Jump to content

Tropical Storm Danny (2009): Difference between revisions

This is a good article. Click here for more information.
From Wikipedia, the free encyclopedia
Browse history interactively
← Previous edit
Content deleted Content added
VisualWikitext
No edit summary
Hurricane Noah (talk | contribs)
29,117 edits
Added {{Merge to}} tag
 
(34 intermediate revisions by 26 users not shown)
Line 1: Line 1:
{{otherhurricaneuses|Hurricane Danny|the 2009 tropical storm}}
{{Short description|Atlantic tropical storm in 2009}}
{{Merge to|2009 Atlantic hurricane season|discuss=Talk:2009 Atlantic hurricane season#Proposed merge of Tropical Storm Danny (2009) into 2009 Atlantic hurricane season|date=February 2024}}
{{Infobox Hurricane
{{Infobox weather event
| Name=Tropical Storm Danny
| Type=Tropical storm
| name = Tropical Storm Danny
⚫
| image = Danny A2009238 1730 1km.jpg
| Year=2009
| caption = Tropical Storm Danny intensifying off [[the Bahamas]] on August 26
| Basin=Atl
⚫
| formed = August 26, 2009
⚫
| Image location=Danny A2009238 1730 1km.jpg
⚫
| dissipated = August 29, 2009
| Image name=Tropical Storm Danny before weakening
}}{{Infobox weather event/NWS
⚫
| Formed=August 26, 2009
⚫
| winds = 50
⚫
| Dissipated=August 29, 2009
⚫
| pressure = 1006
⚫
| 1-min winds=50
}}{{Infobox weather event/Effects
⚫
| Pressure=1006
| Damages= Minimal
| year = 2009
| Fatalities=1 direct
| fatalities = 1 direct
| damage-suffix = Minimal
| Areas=[[North Carolina]], [[Northeastern United States]] and [[Atlantic Canada]]
| areas = [[North Carolina]], [[Northeastern United States]] and [[Atlantic Canada]]
⚫
| Hurricane season=[[2009 Atlantic hurricane season]]
| refs =
}}{{Infobox weather event/Footer
⚫
| season = [[2009 Atlantic hurricane season]]
}}
}}
'''Tropical Storm Danny''' was a weak and disorganized [[tropical cyclone]] that formed in August 2009. The fourth tropical system and third named storm of the [[2009 Atlantic hurricane season]], Danny developed on August 26 from the interaction between a westward-moving [[tropical wave]] and an upper-level [[trough (meteorology)|trough]] while situated east of the [[Bahamas]]. The storm never fully matured, and resembled a [[subtropical cyclone]]. It meandered generally northwestward before being absorbed into another weather system on August 29.
'''Tropical Storm Danny''' was a weak and disorganized [[tropical cyclone]] that formed in August 2009. The fifth tropical depression and fourth named storm of the [[2009 Atlantic hurricane season]], Danny developed on August 26 from the interaction between a westward-moving [[tropical wave]] and an upper-level [[trough (meteorology)|trough]] while situated east of the [[Bahamas]]. The storm never fully matured, and resembled a [[subtropical cyclone]]. It meandered generally northwestward before being absorbed into another weather system on August 29.


Danny had only minor effects on land. However, it triggered high surf and rip currents from [[Florida]] through the [[Mid-Atlantic states]], leading to the death of a 12-year-old boy in [[North Carolina]]. The cyclone's remnants contributed to widespread rainfall in the northeast United States. At one point, some weather forecasts predicted Danny to rapidly strengthen, and hit Nantucket as a Category 1 Hurricane, although this never occured. Localized flooding was reported, particularly in [[Pennsylvania]]. It later caused heavy precipitation and power outages in [[Atlantic Canada]].
Danny had only minor effects on land. However, it triggered high surf and rip currents from [[Florida]] through the [[Mid-Atlantic states]], leading to the death of a 12-year-old boy in [[North Carolina]]. The cyclone's remnants contributed to widespread rainfall in the northeast United States. At one point, some weather forecasts predicted Danny to rapidly strengthen, and hit Nantucket as a Category 1 hurricane, although this never occurred. Localized flooding was reported, particularly in [[Pennsylvania]]. It later caused heavy precipitation and power outages in [[Atlantic Canada]].


==Meteorological history==
==Meteorological history==
{{storm path|Danny 2009 track.png}}
{{storm path|Danny 2009 track.png}}
Danny originated in a [[tropical wave]] that exited the west coast of [[Africa]] on August 18 and entered the [[Atlantic Ocean]]. [[atmospheric convection|Convective activity]] associated with the system briefly showed signs of organization on August 22; however, [[wind shear]] stunted further development. On August 24, shower activity once again increased as the disturbance interacted with an upper-level [[trough (meteorology)|trough]].<ref name="report">{{cite web|author=John L. Beven|title=Tropical Storm Danny Tropical Cyclone Report|date=January 6, 2010|publisher=National Hurricane Center|accessdate=January 12, 2010|url=http://www.nhc.noaa.gov/pdf/TCR-AL052009_Danny.pdf}}</ref> On the afternoon of August 25, the [[National Hurricane Center]] assessed a high chance of tropical cyclone formation within 48 hours.<ref name="disc1">{{cite web|author=Forecaster Wallace|title=Tropical Weather Discussion for August 25, 2009|date=August 25, 2009|publisher=National Hurricane Center|accessdate=January 12, 2010|url=http://www.nhc.noaa.gov/archive/text/TWDAT/TWDAT.200908251749.txt}}</ref> That same day, a [[Hurricane Hunters]] mission into the system revealed a broad area of tropical-storm force winds, but no closed circulation center. However, around 0900 UTC on August 26, satellite imagery and [[QuikSCAT]] information indicated that a closed circulation had formed. While situated about {{convert|430|mi|km|abbr=on}} to the east of [[Nassau, Bahamas]], the feature was declared a tropical storm—skipping the tropical depression stage.<ref name="report"/>
Danny originated in a [[tropical wave]] that exited the west coast of [[Africa]] on August 18. [[atmospheric convection|Convective activity]] associated with the system briefly began to organize on August 22, but [[wind shear]] soon halted further development. On August 24, thunderstorms once again increased as the disturbance interacted with an upper-level [[trough (meteorology)|trough]].<ref name="report">{{cite web|author=John L. Beven|title=Tropical Storm Danny Tropical Cyclone Report|date=January 6, 2010|publisher=National Hurricane Center|access-date=January 12, 2010|url={{NHC TCR url|id=AL052009_Danny}}}}</ref> On August 25, a [[Hurricane Hunters]] mission into the system revealed a broad area of tropical-storm force winds, but no closed circulation center. However, around 0900 UTC on August 26, satellite imagery and [[QuikSCAT]] data indicated that a closed low had formed. While situated about {{convert|430|mi|km|abbr=on}} east of [[Nassau, Bahamas]], the feature was declared a tropical storm—skipping the tropical depression stage.<ref name="report"/>


Due to the interaction of the initial wave and the upper-level trough, Danny maintained a "non-classical" structure resembling that of a [[subtropical cyclone]].<ref name="report"/> Even after its designation as a tropical storm, the storm was highly disorganized. Little or no deep thunderstorm activity surrounded the center, and the highest winds in relation to the cyclone were confined to a [[rainband]] in the northern semicircle.<ref name="adv1">{{cite web|author=Forecaster Beven|title=Tropical Storm Danny Discussion Number 2|date=August 26, 2009|publisher=National Hurricane Center|accessdate=January 12, 2010|url=http://www.nhc.noaa.gov/archive/2009/al05/al052009.discus.002.shtml?}}</ref> The storm moved erratically northwestward throughout the day, strengthening slightly.<ref name="report"/> Danny's center reformed several times, making it difficult to determine its exact forward motion.<ref name="adv4">{{cite web|author=Forecaster Blake|title=Tropical Storm Danny Discussion Number 4|date=August 27, 2009|publisher=National Hurricane Center|accessdate=January 12, 2010|url=http://www.nhc.noaa.gov/archive/2009/al05/al052009.discus.004.shtml?}}</ref>
Due to the interaction of the initial wave and the upper-level trough, Danny maintained a "non-classical" structure resembling that of a [[subtropical cyclone]].<ref name="report"/> Even after its designation as a tropical storm, the storm was highly disorganized. Little or no deep thunderstorm activity surrounded the center, and the highest winds were confined to a [[rainband]] in the northern semicircle of the cyclone.<ref name="adv1">{{cite web|author=Forecaster Beven|title=Tropical Storm Danny Discussion Number 2|date=August 26, 2009|publisher=National Hurricane Center|access-date=January 12, 2010|url=http://www.nhc.noaa.gov/archive/2009/al05/al052009.discus.002.shtml?}}</ref> The storm moved erratically northwestward throughout the day on August 26, strengthening only slightly.<ref name="report"/> Danny's center reformed several times, making it difficult to determine its direction of movement.<ref name="adv4">{{cite web|author=Forecaster Blake|title=Tropical Storm Danny Discussion Number 4|date=August 27, 2009|publisher=National Hurricane Center|access-date=January 12, 2010|url=http://www.nhc.noaa.gov/archive/2009/al05/al052009.discus.004.shtml?}}</ref>


By early on August 27, the tropical storm became slightly better organized, although the most intense winds were still removed from the center.<ref name="adv4">{{cite web|author=Forecaster Beven|title=Tropical Storm Danny Discussion Number 5|date=August 27, 2009|publisher=National Hurricane Center|accessdate=January 12, 2010|url=http://www.nhc.noaa.gov/archive/2009/al05/al052009.discus.005.shtml?}}</ref> Danny peaked with [[maximum sustained winds]] of 60&nbsp;mph (95&nbsp;km/h) and a minimum pressure of 1006 mbar (hPa; 29.71 inHg). It held this strength for about 12 hours before [[wind shear]] caused the storm to gradually weaken as it meandered northward.<ref name="report"/> By August 28, Danny further deteriorated, and reconnaissance aircraft found that it was barely a tropical storm.<ref name="adv8">{{cite web|author=Forecaster Avila|title=Tropical Storm Danny Discussion Number 8|date=August 28, 2009|publisher=National Hurricane Center|accessdate=January 12, 2010|url=http://www.nhc.noaa.gov/archive/2009/al05/al052009.discus.008.shtml}}</ref> After stalling during the afternoon, the center resumed a north or north-northwestward drift.<ref name="adv9">{{cite web|author=Forecaster Brennan|title=Tropical Storm Danny Discussion Number 10|date=August 28, 2009|publisher=National Hurricane Center|accessdate=January 12, 2010|url=http://www.nhc.noaa.gov/archive/2009/al05/al052009.discus.010.shtml?}}</ref>
By early on August 27, the tropical storm became slightly better organized, although the most intense winds were still removed from the center.<ref name="adv5">{{cite web|author=Forecaster Beven|title=Tropical Storm Danny Discussion Number 5|date=August 27, 2009|publisher=National Hurricane Center|access-date=January 12, 2010|url=http://www.nhc.noaa.gov/archive/2009/al05/al052009.discus.005.shtml?}}</ref> Danny peaked with [[maximum sustained winds]] of 60&nbsp;mph (95&nbsp;km/h) and a minimum pressure of 1006 mbar (hPa; 29.71 inHg). It held this strength for about 12 hours before reinvigorated shear caused the storm to gradually weaken as it meandered northward.<ref name="report"/> By August 28, Danny further deteriorated, and reconnaissance aircraft found that it was barely a tropical storm.<ref name="adv8">{{cite web|author=Forecaster Avila|title=Tropical Storm Danny Discussion Number 8|date=August 28, 2009|publisher=National Hurricane Center|access-date=January 12, 2010|url=http://www.nhc.noaa.gov/archive/2009/al05/al052009.discus.008.shtml}}</ref> After stalling during the afternoon, the center resumed a north or north-northwestward drift.<ref name="adv9">{{cite web|author=Forecaster Brennan|title=Tropical Storm Danny Discussion Number 10|date=August 28, 2009|publisher=National Hurricane Center|access-date=January 12, 2010|url=http://www.nhc.noaa.gov/archive/2009/al05/al052009.discus.010.shtml?}}</ref>


[[File:Tropical Storm Danny 2009-08-28 1540Z.jpg|right|thumb|Tropical Storm Danny with its convection displaced by vertical [[wind shear]] on August 28]]
A strong upper-level trough moving through the southeastern United States forced Danny northeastward, and also triggered the formation of another low pressure system near the coast of [[North Carolina]] early on August 29. Although this low formed within Danny's cyclonic envelope, satellite imagery indicates that it did not have the characteristics of a tropical cyclone. Therefore, it is not considered to be a continuation of Danny. The new low caused the tropical storm to degenerate into a trough about 275 mi (445 km) southeast of [[Wilmington, North Carolina]], and Danny's remnants were absorbed into a developing [[weather front|frontal zone]] shortly thereafter.<ref name="report"/>
A strong upper-level trough moving through the southeastern United States forced Danny northeastward. It also triggered the formation of another low pressure system near the coast of [[North Carolina]] early on August 29. Although this low formed within Danny's cyclonic envelope, satellite imagery indicated that it did not have the characteristics of a tropical cyclone. Therefore, it is not considered to be a continuation of Danny. The new low caused the tropical storm to degenerate into a trough about 275&nbsp;mi (445&nbsp;km) southeast of [[Wilmington, North Carolina]], and Danny's remnants were absorbed into a developing [[weather front|frontal zone]] shortly thereafter.<ref name="report"/>


==Impact==
==Impact==
⚫
In advance of the cyclone, a [[tropical storm watch]] was posted for [[North Carolina]] from [[Cape Lookout, North Carolina|Cape Lookout]] to the town of [[Duck, North Carolina|Duck]] at 2100 UTC on August 27. It was discontinued on August 29.<ref name="report"/>
[[File:Overcast skies from Tropical Storm Danny.jpg|left|thumb|Overcast skies from Danny]]
⚫
In advance of the cyclone, a [[tropical storm watch]] was posted for [[North Carolina]] from [[Cape Lookout, North Carolina|Cape Lookout]] to [[Duck, North Carolina|Duck]] at 2100 UTC on August 27. It was discontinued on August 29.<ref name="report"/>


Since the storm remained offshore for the most part, its effects were limited. However, it generated strong rip currents and rough waves on the [[U.S. East Coast]] which may have resulted in the death of a 12-year-old boy who went was missing while body-boarding near [[Corolla, North Carolina]] on August 28.<ref>{{cite web|author=Jeff Hampton and Patrick Wilson|title=Coast Guard ends search for boy missing off Corolla|date=August 29, 2009|publisher=''The Virginian-Pilot''|accessdate=December 9, 2009|url=http://www.norfolk.com/2009/08/12yearold-missing-after-falling-bodyboard-corolla}}</ref> On September 1, the [[Currituck County, North Carolina|Currituck County]] Sheriff's Office reported that the boy's body was found on the beach about {{convert|1|mi|km|abbr=on}} north of where he went missing.<ref>{{cite web|author=Paul Cox|title=Authorities find body of N.Y. boy who disappeared along N.C. coast|date=September 1, 2009|publisher=''The Star-Ledger''|accessdate=December 9, 2009|url=http://www.nj.com/news/index.ssf/2009/09/authorities_find_body_of_12yea.html}}</ref> Further to the south, Danny created waves {{convert|6|to|7|ft|m|abbr=on}} in height along [[Florida]]'s coast.<ref>{{cite web|author=|title=Event Record Details for Florida: High Surf|year=2009|publisher=[[National Climatic Data Center]]|accessdate=December 9, 2009|url=http://www4.ncdc.noaa.gov/cgi-win/wwcgi.dll?wwevent~ShowEvent~781449}}</ref> High surf and rip currents also affected [[Delaware]] and [[New Jersey]], prompting officials to issue bathing restrictions.<ref>{{cite web|author=|title=Event Record Details for Delaware: High Surf|year=2009|publisher=National Climatic Data Center|accessdate=December 9, 2009|url=http://www4.ncdc.noaa.gov/cgi-win/wwcgi.dll?wwevent~ShowEvent~783354}}</ref> A surfer in [[Monmouth County, New Jersey|Monmouth County]] broke his leg in the rough conditions.<ref>{{cite web|author=|title=Event Record Details for New Jersey: High Surf|year=2009|publisher=National Climatic Data Center|accessdate=December 9, 2009|url=http://www4.ncdc.noaa.gov/cgi-win/wwcgi.dll?wwevent~ShowEvent~784011}}</ref>
As the storm remained offshore, its effects were limited. However, it generated strong rip currents and high waves along the [[U.S. East Coast]] which may have resulted in the drowning death of a 12-year-old boy near [[Corolla, North Carolina]], on August 28.<ref>{{cite news|author=Jeff Hampton and Patrick Wilson|title=Coast Guard ends search for boy missing off Corolla|date=August 29, 2009|newspaper=The Virginian-Pilot}}</ref> On September 1, the [[Currituck County, North Carolina|Currituck County]] Sheriff's Office reported that the boy's body was found on the beach about {{convert|1|mi|km|abbr=on}} north of where he went missing.<ref>{{cite news|author=Paul Cox|title=Authorities find body of N.Y. boy who disappeared along N.C. coast|date=September 1, 2009|newspaper=The Star-Ledger|access-date=December 9, 2009|url=http://www.nj.com/news/index.ssf/2009/09/authorities_find_body_of_12yea.html}}</ref> Farther south, {{convert|7|ft|m|sigfig=1|adj=on}} swells reached [[Florida]]'s Atlantic coast.<ref>{{cite web|author=|title=Event Record Details for Florida: High Surf|year=2009|publisher=[[National Climatic Data Center]]|access-date=December 9, 2009|url=http://www4.ncdc.noaa.gov/cgi-win/wwcgi.dll?wwevent~ShowEvent~781449}}{{Dead link|date=November 2018 |bot=InternetArchiveBot |fix-attempted=yes }}</ref> High surf and rip currents also affected the [[Mid-Atlantic states]], prompting officials to issue bathing restrictions.<ref>{{cite web|author=|title=Event Record Details for Delaware: High Surf|year=2009|publisher=National Climatic Data Center|access-date=December 9, 2009|url=http://www4.ncdc.noaa.gov/cgi-win/wwcgi.dll?wwevent~ShowEvent~783354}}{{Dead link|date=November 2018 |bot=InternetArchiveBot |fix-attempted=yes }}</ref> A surfer in [[Monmouth County, New Jersey]], broke his leg in the rough conditions.<ref>{{cite web|author=|title=Event Record Details for New Jersey: High Surf|year=2009|publisher=National Climatic Data Center|access-date=December 9, 2009|url=http://www4.ncdc.noaa.gov/cgi-win/wwcgi.dll?wwevent~ShowEvent~784011}}{{Dead link|date=November 2018 |bot=InternetArchiveBot |fix-attempted=yes }}</ref>
[[File:TS Danny 2009 Aug 26 1415Z.jpg|right|thumb|The storm system on August 26]]


The remnants of the storm interacted with a [[weather front|frontal boundary]], triggering widespread rainfall in numerous states which led to localized flooding. In [[Delaware County, Pennsylvania|Delaware County]], torrential rainfall produced flash flooding that trapped one family in their basement.<ref>{{cite web|author=|title=Event Record Details for Pennsylvania: Flash Flood|year=2009|publisher=National Climatic Data Center|accessdate=December 9, 2009|url=http://www4.ncdc.noaa.gov/cgi-win/wwcgi.dll?wwevent~ShowEvent~781744}}</ref> A creek near [[Philadelphia]] overflowed its banks and caused minor flooding.<ref>{{cite web|author=|title=Event Record Details for Pennsylvania: Flood|year=2009|publisher=National Climatic Data Center|accessdate=December 9, 2009|url=http://www4.ncdc.noaa.gov/cgi-win/wwcgi.dll?wwevent~ShowEvent~781743}}</ref> Several roads in [[Lehigh County, Pennsylvania|Lehigh County]], including one lane of [[U.S. Route 222]], were closed due to flood waters.<ref>{{cite web|author=|title=Event Record Details for Pennsylvania: Flash Flood|year=2009|publisher=National Climatic Data Center|accessdate=December 9, 2009|url=http://www4.ncdc.noaa.gov/cgi-win/wwcgi.dll?wwevent~ShowEvent~782565}}</ref> Flooding also took place in New Jersey; numerous basements were submerged and water rescues from vehicles were performed in [[Camden County, New Jersey|Camden County]].<ref>{{cite web|author=|title=Event Record Details for New Jersey: Flash Flood|year=2009|publisher=National Climatic Data Center|accessdate=December 9, 2009|url=http://www4.ncdc.noaa.gov/cgi-win/wwcgi.dll?wwevent~ShowEvent~782565}}</ref> Isolated reports of {{convert|7|in|mm|abbr=on}} of precipitation were received in [[Maryland]].<ref>{{cite web|author=|title=Event Record Details for Maryland: Flash Flood|year=2009|publisher=National Climatic Data Center|accessdate=December 9, 2009|url=http://www4.ncdc.noaa.gov/cgi-win/wwcgi.dll?wwevent~ShowEvent~782331}}</ref>
The remnants of the storm interacted with a [[weather front|frontal boundary]], triggering widespread precipitation across numerous states. In [[Delaware County, Pennsylvania]], torrential rainfall produced flash flooding that trapped one family in their basement.<ref>{{cite web|author=|title=Event Record Details for Pennsylvania: Flash Flood|year=2009|publisher=National Climatic Data Center|access-date=December 9, 2009|url=http://www4.ncdc.noaa.gov/cgi-win/wwcgi.dll?wwevent~ShowEvent~781744}}{{Dead link|date=November 2018 |bot=InternetArchiveBot |fix-attempted=yes }}</ref> A creek near [[Philadelphia]] overflowed its banks and caused minor flooding.<ref>{{cite web|author=|title=Event Record Details for Pennsylvania: Flood|year=2009|publisher=National Climatic Data Center|access-date=December 9, 2009|url=http://www4.ncdc.noaa.gov/cgi-win/wwcgi.dll?wwevent~ShowEvent~781743}}{{Dead link|date=November 2018 |bot=InternetArchiveBot |fix-attempted=yes }}</ref> Several roads in [[Lehigh County, Pennsylvania|Lehigh County]], including one lane of [[U.S. Route 222]], were closed due to flood waters.<ref>{{cite web|author=|title=Event Record Details for Pennsylvania: Flash Flood|year=2009|publisher=National Climatic Data Center|access-date=December 9, 2009|url=http://www4.ncdc.noaa.gov/cgi-win/wwcgi.dll?wwevent~ShowEvent~782565}}{{Dead link|date=November 2018 |bot=InternetArchiveBot |fix-attempted=yes }}</ref> Flooding also took place in New Jersey; numerous basements were submerged and motorists in [[Camden County, New Jersey|Camden County]] had to be rescued from their vehicles.<ref>{{cite web|author=|title=Event Record Details for New Jersey: Flash Flood|year=2009|publisher=National Climatic Data Center|access-date=December 9, 2009|url=http://www4.ncdc.noaa.gov/cgi-win/wwcgi.dll?wwevent~ShowEvent~782565}}{{Dead link|date=November 2018 |bot=InternetArchiveBot |fix-attempted=yes }}</ref> In [[Maryland]], rainfall peaked at {{convert|7|in|mm|abbr=on}}.<ref>{{cite web|author=|title=Event Record Details for Maryland: Flash Flood|year=2009|publisher=National Climatic Data Center|access-date=December 9, 2009|url=http://www4.ncdc.noaa.gov/cgi-win/wwcgi.dll?wwevent~ShowEvent~782331}}{{Dead link|date=November 2018 |bot=InternetArchiveBot |fix-attempted=yes }}</ref> The extratropical system impacted [[New England]] with high winds and heavy rainfall. At least {{convert|2|in|mm|abbr=on|sigfig=1}} of rain fell in [[Massachusetts]] and [[Rhode Island]]. Some roads throughout the region became impassable due to standing water.<ref>{{cite web|author=|title=Even Record Details for Massachusetts|year=2009|publisher=National Climatic Data Center|access-date=December 9, 2009|url=http://www4.ncdc.noaa.gov/cgi-win/wwcgi.dll?wwevent~ShowEvent~782000}}{{Dead link|date=November 2018 |bot=InternetArchiveBot |fix-attempted=yes }}</ref> A site in the [[Nantucket Sound]] recorded a wind gust to {{convert|61|mph|km/h|abbr=on}}.<ref>{{cite web|author=|title=Event Record Details for North Atlantic to Canada: Marine High Wind|year=2009|publisher=National Climatic Data Center|access-date=December 9, 2009|url=http://www4.ncdc.noaa.gov/cgi-win/wwcgi.dll?wwevent~ShowEvent~782033}}{{Dead link|date=November 2018 |bot=InternetArchiveBot |fix-attempted=yes }}</ref> The former tropical cyclone produced wind gusts of {{convert|60|mph|km/h|abbr=on}} in [[Maine]], toppling trees and ripping boats from their [[mooring (watercraft)|mooring]]s at a harbor in [[Eastport, Maine|Eastport]].<ref>{{cite web|author=|title=Event Record Details for Maine: High Wind|year=2009|publisher=National Climatic Data Center|access-date=December 9, 2009|url=http://www4.ncdc.noaa.gov/cgi-win/wwcgi.dll?wwevent~ShowEvent~782736}}{{Dead link|date=November 2018 |bot=InternetArchiveBot |fix-attempted=yes }}</ref>


⚫
Danny's remnants later caused heavy rain across [[Atlantic Canada]]. At [[Saint John, New Brunswick]], {{convert|100|mm|in|abbr=on}} of rain flooded at least 50 basements. The [[Meteorological Service of Canada]] hoisted several weather advisories for [[New Brunswick]], [[Newfoundland and Labrador|Newfoundland]], [[Prince Edward Island]] and [[Nova Scotia]].<ref name="canada">{{cite news|author=The Canadian Press|title=Remnants of Danny bring wind, rain to N.L. after moving through Cape Breton|date=August 30, 2009|newspaper=The Cape Breton Post|access-date=December 9, 2009|url=http://www.capebretonpost.com/index.cfm?sid=282214&sc=145|archive-url=https://web.archive.org/web/20180909073904/http://www.capebretonpost.com/index.cfm?sid=282214&sc=145|archive-date=September 9, 2018|url-status=dead}}</ref><ref name="Canada">{{cite web|author=Forecaster Campbell|title=Hurricane Danny Information Statement|date=August 29, 2009|publisher=Canadian Hurricane Centre|access-date=January 13, 2010|url=http://www.atl.ec.gc.ca/weather/hurricane/bulletins/20090829234613.Danny.txt.en|url-status=dead|archive-url=https://web.archive.org/web/20110611115013/http://www.atl.ec.gc.ca/weather/hurricane/bulletins/20090829234613.Danny.txt.en|archive-date=June 11, 2011}}</ref> In Nova Scotia, over 16,000 residences lost power at the height of the storm.<ref>{{cite news|author=The Canadian Press|title=Post-tropical storm Danny moving across Cape Breton|date=August 30, 2009|newspaper=The Cape Breton Post|access-date=December 9, 2009|url=http://www.capebretonpost.com/index.cfm?sid=282211&sc=145|archive-url=https://web.archive.org/web/20180909112117/http://www.capebretonpost.com/index.cfm?sid=282211&sc=145|archive-date=September 9, 2018|url-status=dead}}</ref>
Once extratropical, the system impacted [[New England]] with high winds and heavy rainfall. At least {{convert|2|in|mm|abbr=on}} of rain fell in [[Massachusetts]] and [[Rhode Island]]. Some roads throughout the region became impassable due to standing water.<ref>{{cite web|author=|title=Even Record Details for Massachusetts|year=2009|publisher=National Climatic Data Center|accessdate=December 9, 2009|url=http://www4.ncdc.noaa.gov/cgi-win/wwcgi.dll?wwevent~ShowEvent~782000}}</ref> A site in the [[Nantucket Sound]] recorded a wind gust to {{convert|61|mph|km/h|abbr=on}}.<ref>{{cite web|author=|title=Event Record Details for North Atlantic to Canada: Marine High Wind|year=2009|publisher=National Climatic Data Center|accessdate=December 9, 2009|url=http://www4.ncdc.noaa.gov/cgi-win/wwcgi.dll?wwevent~ShowEvent~782033}}</ref> The former tropical cyclone produced wind gusts of {{convert|60|mph|km/h|abbr=on}} in [[Maine]], toppling trees and ripping boats from their [[mooring]]s at a harbor in [[Eastport, Maine|Eastport]].<ref>{{cite web|author=|title=Event Record Details for Maine: High Wind|year=2009|publisher=National Climatic Data Center|accessdate=December 9, 2009|url=http://www4.ncdc.noaa.gov/cgi-win/wwcgi.dll?wwevent~ShowEvent~782736}}</ref> The system also brought heavy rainfall to the area.<ref>{{cite web|author=|title=Event Record Details for Maine: Flood|year=2009|publisher=National Climatic Data Center|accessdate=December 9, 2009|url=http://www4.ncdc.noaa.gov/cgi-win/wwcgi.dll?wwevent~ShowEvent~783827}}</ref>

⚫
Danny's remnants later caused heavy rain across [[Atlantic Canada]]. At [[Saint John, New Brunswick]], {{convert|100|mm|in|abbr=on}} of rain fell, and at least 50 basements were flooded. The [[Meteorological Service of Canada]] declared several weather advisories for [[New Brunswick]], [[Newfoundland and Labrador|Newfoundland]], [[Prince Edward Island]] and [[Nova Scotia]].<ref name="canada">{{cite web|author=''The Canadian Press''|title=Remnants of Danny bring wind, rain to N.L. after moving through Cape Breton|date=August 30, 2009|publisher=''The Cape Breton Post''|accessdate=December 9, 2009|url=http://www.capebretonpost.com/index.cfm?sid=282214&sc=145}}</ref><ref name="Canada">{{cite web|author=Forecaster Campbell|title=Hurricane Danny Information Statement|date=August 29, 2009|publisher=Canadian Hurricane Centre|accessdate=January 13, 2010|url=http://www.atl.ec.gc.ca/weather/hurricane/bulletins/20090829234613.Danny.txt.en}}</ref> In Nova Scotia, during the storm's worst, over 16,000 residences lost power.<ref>{{cite web|author=''The Canadian Press''|title=Post-tropical storm Danny moving across Cape Breton|date=August 30, 2009|publisher=''The Cape Breton Post''|accessdate=December 9, 2009|url=http://www.capebretonpost.com/index.cfm?sid=282211&sc=145}}</ref> The name "Danny" was not [[List of retired Atlantic hurricane names|retired]] following its usage; as such, it is scheduled to be used again in 2015.<ref name="names">{{cite web|title=Worldwide Tropical Cyclone Names|year=2010|publisher=National Hurricane Center|accessdate=January 12, 2010|url=http://www.nhc.noaa.gov/aboutnames.shtml}}</ref>


==See also==
==See also==
{{Portal|Tropical cyclones}}
{{tcportal}}
{{wikinews|Tropical Storm Danny to threaten the U.S. East Coast this weekend}}
{{Wikinews|Tropical Storm Danny to threaten the U.S. East Coast this weekend}}
*[[Timeline of the 2009 Atlantic hurricane season]]
*[[Timeline of the 2009 Atlantic hurricane season]]
*[[List of North Carolina hurricanes (1980–present)]]
*[[List of North Carolina hurricanes (2000–present)]]
*[[List of New England hurricanes]]
*[[List of New England hurricanes]]
*[[List of Canada hurricanes]]
*[[List of Canada hurricanes]]
*[[Hurricane Danny (disambiguation)|Other storms of the same name]]


==References==
==References==
{{reflist|2}}
{{Reflist|2}}


==External links==
==External links==
{{Commons category}}
{{commonscat}}
*[http://www.nhc.noaa.gov/archive/2009/DANNY.shtml? Advisory archive for Tropical Storm Danny]
*[http://www.nhc.noaa.gov/archive/2009/DANNY.shtml? Advisory archive for Tropical Storm Danny]
*[http://www.atl.ec.gc.ca/weather/hurricane/bulletins_all_e.html#2009:Danny List of bulletins] from the Canadian Hurricane Centre
*[https://web.archive.org/web/20110611125232/http://www.atl.ec.gc.ca/weather/hurricane/bulletins_all_e.html#2009:Danny List of bulletins] from the Canadian Hurricane Centre


{{2009 Atlantic hurricane season buttons}}
{{2009 Atlantic hurricane season buttons}}

{{Good article}}


{{DEFAULTSORT:Danny (2009)}}
{{DEFAULTSORT:Danny (2009)}}
Line 65: Line 68:
[[Category:Atlantic tropical storms]]
[[Category:Atlantic tropical storms]]
[[Category:Hurricanes in Canada]]
[[Category:Hurricanes in Canada]]
[[Category:North Carolina hurricanes]]
[[Category:Hurricanes in North Carolina]]
[[Category:Tropical cyclones in 2009|Danny]]

[[eu:Danny ekaitz tropikala (2009)]]
[[fr:Tempête tropicale Danny (2009)]]
[[pt:Tempestade tropical Danny (2009)]]
[[ru:Тропический шторм Дэнни (2009)]]

Latest revision as of 14:11, 23 February 2024

Tropical Storm Danny
Tropical Storm Danny intensifying off the Bahamas on August 26
Meteorological history
FormedAugust 26, 2009
DissipatedAugust 29, 2009
Tropical storm
1-minute sustained (SSHWS/NWS)
Highest winds60 mph (95 km/h)
Lowest pressure1006 mbar (hPa); 29.71 inHg
Overall effects
Fatalities1 direct
DamageMinimal
Areas affectedNorth Carolina, Northeastern United States and Atlantic Canada
IBTrACSEdit this at Wikidata
Part of the 2009 Atlantic hurricane season

Tropical Storm Danny was a weak and disorganized tropical cyclone that formed in August 2009. The fifth tropical depression and fourth named storm of the 2009 Atlantic hurricane season, Danny developed on August 26 from the interaction between a westward-moving tropical wave and an upper-level trough while situated east of the Bahamas. The storm never fully matured, and resembled a subtropical cyclone. It meandered generally northwestward before being absorbed into another weather system on August 29.

Danny had only minor effects on land. However, it triggered high surf and rip currents from Florida through the Mid-Atlantic states, leading to the death of a 12-year-old boy in North Carolina. The cyclone's remnants contributed to widespread rainfall in the northeast United States. At one point, some weather forecasts predicted Danny to rapidly strengthen, and hit Nantucket as a Category 1 hurricane, although this never occurred. Localized flooding was reported, particularly in Pennsylvania. It later caused heavy precipitation and power outages in Atlantic Canada.

Meteorological history

[edit]
Map plotting the storm's track and intensity, according to the Saffir–Simpson scale
Map key
Saffir–Simpson scale
  Tropical depression (≤38 mph, ≤62 km/h)
  Tropical storm (39–73 mph, 63–118 km/h)
  Category 1 (74–95 mph, 119–153 km/h)
  Category 2 (96–110 mph, 154–177 km/h)
  Category 3 (111–129 mph, 178–208 km/h)
  Category 4 (130–156 mph, 209–251 km/h)
  Category 5 (≥157 mph, ≥252 km/h)
  Unknown
Storm type
triangle Extratropical cyclone, remnant low, tropical disturbance, or monsoon depression

Danny originated in a tropical wave that exited the west coast of Africa on August 18. Convective activity associated with the system briefly began to organize on August 22, but wind shear soon halted further development. On August 24, thunderstorms once again increased as the disturbance interacted with an upper-level trough.[1] On August 25, a Hurricane Hunters mission into the system revealed a broad area of tropical-storm force winds, but no closed circulation center. However, around 0900 UTC on August 26, satellite imagery and QuikSCAT data indicated that a closed low had formed. While situated about 430 mi (690 km) east of Nassau, Bahamas, the feature was declared a tropical storm—skipping the tropical depression stage.[1]

Due to the interaction of the initial wave and the upper-level trough, Danny maintained a "non-classical" structure resembling that of a subtropical cyclone.[1] Even after its designation as a tropical storm, the storm was highly disorganized. Little or no deep thunderstorm activity surrounded the center, and the highest winds were confined to a rainband in the northern semicircle of the cyclone.[2] The storm moved erratically northwestward throughout the day on August 26, strengthening only slightly.[1] Danny's center reformed several times, making it difficult to determine its direction of movement.[3]

By early on August 27, the tropical storm became slightly better organized, although the most intense winds were still removed from the center.[4] Danny peaked with maximum sustained winds of 60 mph (95 km/h) and a minimum pressure of 1006 mbar (hPa; 29.71 inHg). It held this strength for about 12 hours before reinvigorated shear caused the storm to gradually weaken as it meandered northward.[1] By August 28, Danny further deteriorated, and reconnaissance aircraft found that it was barely a tropical storm.[5] After stalling during the afternoon, the center resumed a north or north-northwestward drift.[6]

Tropical Storm Danny with its convection displaced by vertical wind shear on August 28

A strong upper-level trough moving through the southeastern United States forced Danny northeastward. It also triggered the formation of another low pressure system near the coast of North Carolina early on August 29. Although this low formed within Danny's cyclonic envelope, satellite imagery indicated that it did not have the characteristics of a tropical cyclone. Therefore, it is not considered to be a continuation of Danny. The new low caused the tropical storm to degenerate into a trough about 275 mi (445 km) southeast of Wilmington, North Carolina, and Danny's remnants were absorbed into a developing frontal zone shortly thereafter.[1]

Impact

[edit]

In advance of the cyclone, a tropical storm watch was posted for North Carolina from Cape Lookout to the town of Duck at 2100 UTC on August 27. It was discontinued on August 29.[1]

As the storm remained offshore, its effects were limited. However, it generated strong rip currents and high waves along the U.S. East Coast which may have resulted in the drowning death of a 12-year-old boy near Corolla, North Carolina, on August 28.[7] On September 1, the Currituck County Sheriff's Office reported that the boy's body was found on the beach about 1 mi (1.6 km) north of where he went missing.[8] Farther south, 7-foot (2 m) swells reached Florida's Atlantic coast.[9] High surf and rip currents also affected the Mid-Atlantic states, prompting officials to issue bathing restrictions.[10] A surfer in Monmouth County, New Jersey, broke his leg in the rough conditions.[11]

The remnants of the storm interacted with a frontal boundary, triggering widespread precipitation across numerous states. In Delaware County, Pennsylvania, torrential rainfall produced flash flooding that trapped one family in their basement.[12] A creek near Philadelphia overflowed its banks and caused minor flooding.[13] Several roads in Lehigh County, including one lane of U.S. Route 222, were closed due to flood waters.[14] Flooding also took place in New Jersey; numerous basements were submerged and motorists in Camden County had to be rescued from their vehicles.[15] In Maryland, rainfall peaked at 7 in (180 mm).[16] The extratropical system impacted New England with high winds and heavy rainfall. At least 2 in (50 mm) of rain fell in Massachusetts and Rhode Island. Some roads throughout the region became impassable due to standing water.[17] A site in the Nantucket Sound recorded a wind gust to 61 mph (98 km/h).[18] The former tropical cyclone produced wind gusts of 60 mph (97 km/h) in Maine, toppling trees and ripping boats from their moorings at a harbor in Eastport.[19]

Danny's remnants later caused heavy rain across Atlantic Canada. At Saint John, New Brunswick, 100 mm (3.9 in) of rain flooded at least 50 basements. The Meteorological Service of Canada hoisted several weather advisories for New Brunswick, Newfoundland, Prince Edward Island and Nova Scotia.[20][21] In Nova Scotia, over 16,000 residences lost power at the height of the storm.[22]

See also

[edit]
Wikinews has related news:

References

[edit]
  1. ^ a b c d e f g John L. Beven (January 6, 2010). "Tropical Storm Danny Tropical Cyclone Report" (PDF). National Hurricane Center. Retrieved January 12, 2010.
  2. ^ Forecaster Beven (August 26, 2009). "Tropical Storm Danny Discussion Number 2". National Hurricane Center. Retrieved January 12, 2010.
  3. ^ Forecaster Blake (August 27, 2009). "Tropical Storm Danny Discussion Number 4". National Hurricane Center. Retrieved January 12, 2010.
  4. ^ Forecaster Beven (August 27, 2009). "Tropical Storm Danny Discussion Number 5". National Hurricane Center. Retrieved January 12, 2010.
  5. ^ Forecaster Avila (August 28, 2009). "Tropical Storm Danny Discussion Number 8". National Hurricane Center. Retrieved January 12, 2010.
  6. ^ Forecaster Brennan (August 28, 2009). "Tropical Storm Danny Discussion Number 10". National Hurricane Center. Retrieved January 12, 2010.
  7. ^ Jeff Hampton and Patrick Wilson (August 29, 2009). "Coast Guard ends search for boy missing off Corolla". The Virginian-Pilot.
  8. ^ Paul Cox (September 1, 2009). "Authorities find body of N.Y. boy who disappeared along N.C. coast". The Star-Ledger. Retrieved December 9, 2009.
  9. ^ "Event Record Details for Florida: High Surf". National Climatic Data Center. 2009. Retrieved December 9, 2009.[permanent dead link]
  10. ^ "Event Record Details for Delaware: High Surf". National Climatic Data Center. 2009. Retrieved December 9, 2009.[permanent dead link]
  11. ^ "Event Record Details for New Jersey: High Surf". National Climatic Data Center. 2009. Retrieved December 9, 2009.[permanent dead link]
  12. ^ "Event Record Details for Pennsylvania: Flash Flood". National Climatic Data Center. 2009. Retrieved December 9, 2009.[permanent dead link]
  13. ^ "Event Record Details for Pennsylvania: Flood". National Climatic Data Center. 2009. Retrieved December 9, 2009.[permanent dead link]
  14. ^ "Event Record Details for Pennsylvania: Flash Flood". National Climatic Data Center. 2009. Retrieved December 9, 2009.[permanent dead link]
  15. ^ "Event Record Details for New Jersey: Flash Flood". National Climatic Data Center. 2009. Retrieved December 9, 2009.[permanent dead link]
  16. ^ "Event Record Details for Maryland: Flash Flood". National Climatic Data Center. 2009. Retrieved December 9, 2009.[permanent dead link]
  17. ^ "Even Record Details for Massachusetts". National Climatic Data Center. 2009. Retrieved December 9, 2009.[permanent dead link]
  18. ^ "Event Record Details for North Atlantic to Canada: Marine High Wind". National Climatic Data Center. 2009. Retrieved December 9, 2009.[permanent dead link]
  19. ^ "Event Record Details for Maine: High Wind". National Climatic Data Center. 2009. Retrieved December 9, 2009.[permanent dead link]
  20. ^ The Canadian Press (August 30, 2009). "Remnants of Danny bring wind, rain to N.L. after moving through Cape Breton". The Cape Breton Post. Archived from the original on September 9, 2018. Retrieved December 9, 2009.
  21. ^ Forecaster Campbell (August 29, 2009). "Hurricane Danny Information Statement". Canadian Hurricane Centre. Archived from the original on June 11, 2011. Retrieved January 13, 2010.
  22. ^ The Canadian Press (August 30, 2009). "Post-tropical storm Danny moving across Cape Breton". The Cape Breton Post. Archived from the original on September 9, 2018. Retrieved December 9, 2009.
[edit]
Wikimedia Commons has media related to Tropical Storm Danny (2009).

Retrieved from "https://en.wikipedia.org/w/index.php?title=Tropical_Storm_Danny_(2009)&oldid=1209771030"