Hurricane Danielle (2004): Difference between revisions
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#REDIRECT [[2004 Atlantic hurricane season#Hurricane Danielle]] |
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{{Infobox Hurricane |
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| Name=Hurricane Danielle |
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| Type=hurricane |
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| Year=2004 |
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| Basin=Atl |
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| Image location=File:Danielle 2004-08-16 1615Z.png |
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| Image name=Hurricane Danielle near peak intensity on August 16 |
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| Formed=August 13, 2004 |
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| Dissipated=August 21, 2004 |
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| 1-min winds=95 |
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| Pressure=964 |
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| Damages=None |
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| Fatalities=None |
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| Areas=[[Cape Verde]] |
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| Hurricane season=[[2004 Atlantic hurricane season]] |
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}} |
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'''Hurricane Danielle''' was the first of several [[Cape Verde hurricane]]s to form during the [[2004 Atlantic hurricane season]]. Danielle was the fourth [[tropical cyclone|named storm]] and third hurricane of the season. Danielle formed on August 13, 2004 in the far eastern [[Atlantic Ocean]] and remained over the central Atlantic, peaking as a strong [[Saffir-Simpson hurricane scale#Category 2|Category 2 hurricane]] on August 16. Reaching cooler waters, Danielle began to weaken, becoming a [[Low pressure area|remnant low]] on August 21 and dissipating on August 24. Danielle never approached land, although it briefly threatened the [[Azores]] as it made a northerly turn. As a result, there was no impact caused by the storm. |
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==Meteorological history== |
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{{storm path|Danielle 2004 track.png}} |
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Hurricane Danielle began as a vigorous [[tropical wave]] over [[Africa]]. As the wave emerged into the Atlantic, it quickly became more organized due to favorable conditions, including low [[wind shear]]. The circulation consolidated and spawned Tropical Depression Four on the morning of August 13 south-southeast of the [[Cape Verde]] islands.<ref name="DanielleTCR">{{cite web| author=Stacy R. Stewart | date=November 19, 2004| title=Tropical Cyclone Report: Hurricane Danielle| publisher=National Hurricane Center| accessdate=October 26, 2006| url={{NHC TCR url|id=AL042004_Danielle}}|format=[[PDF]]}}</ref> The system was over somewhat cooler water at first with [[sea surface temperatures]] around 79 °F (26 °C);<ref>{{cite web|author=Stewart|publisher=National Hurricane Center|date=August 13, 2004|accessdate=October 26, 2006|title=Tropical Depression Four Discussion Two|url=http://www.nhc.noaa.gov/archive/2004/dis/al042004.discus.002.shtml}}</ref> however, the low shear environment allowed the depression to continue to organize. Late that evening, the system strengthened into Tropical Storm Danielle.<ref name="DanielleTCR"/> |
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As Danielle tracked westward into the open Atlantic early on August 14, the storm encountered warmer water southwest of Cape Verde and began to gradually intensify, becoming a moderate tropical storm with 50 mph (85 km/h) winds that morning. At that point, a bout of [[Rapid deepening|rapid intensification]] began to take place, and the storm was upgraded to Hurricane Danielle that evening as an [[eye (cyclone)|eye]] began to form.<ref>{{cite web|author=Brown and Beven|publisher=National Hurricane Center|date=August 14, 2004|accessdate=October 26, 2006|title=Tropical Storm Danielle Discussion Seven|url=http://www.nhc.noaa.gov/archive/2004/dis/al042004.discus.007.shtml}}</ref> Over a 24‑hour period ending in the morning of August 15, the [[Atmospheric pressure|pressure]] fell from 1004 to 978 [[Bar (unit)|mbar]] and the winds increased to 90 mph (145 km/h), making it a high-end [[SSHS#Category 1|Category 1 hurricane]] on the [[Saffir-Simpson hurricane scale]].<ref name="NASA-DAAC">{{cite web| author=Staff Writer| year=2004| title=Hurricane Danielle| publisher=[[NASA]]| accessdate=October 26, 2006| url=http://daac.gsfc.nasa.gov/hurricane/HurricaneDanielle2004.shtml| archive-url=https://web.archive.org/web/20061004132941/http://daac.gsfc.nasa.gov/hurricane/HurricaneDanielle2004.shtml| archive-date=October 4, 2006| url-status=dead}}</ref> |
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Danielle levelled off somewhat in intensity after that round of rapid intensification, only gradually strengthening afterward due to structural changes in the storm related to the small wind field relative to the size of the eye.<ref name="DanielleTCR"/> Nonetheless, Danielle became a Category 2 hurricane on the afternoon of August 15 as it approached the [[subtropical ridge]] which blocked the continued westward movement. Beginning late on August 15, at about 35°W, Danielle began to recurve to the northwest and eventually north while continuing to gradually strengthen.<ref name="DanielleTCR"/> Early on August 16, the recurvature became more pronounced, and Danielle turned abruptly northward in the central [[Atlantic Ocean]] as an upper-level [[Trough (meteorology)|trough]] opened up a large break in the ridge.<ref>{{cite web|author=Stewart Sisko|publisher=National Hurricane Center|date=August 16, 2004|accessdate=October 26, 2006|title=Hurricane Danielle Discussion Twelve|url=http://www.nhc.noaa.gov/archive/2004/dis/al042004.discus.012.shtml}}</ref> That movement took it along the eastern side of the subtropical ridge, preventing Danielle from moving any farther west and becoming any threat to [[North America]] or the [[Caribbean]].<ref name="NASA-DAAC"/> While moving northwest, Danielle strengthened a bit more, reaching its peak intensity of 110 mph (175 km/h), just under Category 3 intensity, on the afternoon of August 16.<ref name="DanielleTCR"/> |
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[[File:Hurricane Danielle 17 aug 2004 1255Z.jpg|right|thumb|Hurricane Danielle weakening on August 17]] |
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The northward movement also sent Danielle into somewhat increased shear, which allowed it to begin to weaken. However, the weakening was gradual at first as the waters remained fairly warm. The abrupt northerly turn meant that, for a while on August 17, the [[Azores]] were threatened by Danielle in the long-range forecast, as a weakened tropical storm or extratropical cyclone.<ref>{{cite web|author=Franklin|publisher=National Hurricane Center|date=August 17, 2004|accessdate=October 26, 2006|title=Hurricane Danielle Discussion Nineteen|url=http://www.nhc.noaa.gov/archive/2004/dis/al042004.discus.019.shtml}}</ref> Danielle weakened to a Category 1 hurricane on the evening of August 17 as shear continued to increase.<ref name="DanielleTCR"/> Danielle began to turn to the northeast early on August 18, and at that point, the weakening trend accelerated. Some of the deep convection was being removed from the system due to wind shear,<ref name="NASA-DAAC"/> and that morning, Danielle weakened to a tropical storm. The rapid weakening trend continued that afternoon, and Danielle weakened to a low-end tropical storm with 45 mph (75 km/h) winds late that evening. However, the intensity levelled off early on August 19 and Danielle remained a tropical storm for the next couple days over moderately warm water of around 78 °F (just under 26 °C) while south-southwest of the Azores.<ref name="DanielleTCR"/> |
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Intermittent deep convection continued to fire up, keeping the storm afloat for the next day and turning it away from the Azores. Danielle also changed direction and meandered slightly to the northwest, away from the Azores, due to very weak steering currents.<ref>{{cite web|author=Avila|publisher=National Hurricane Center|date=August 19, 2004|accessdate=October 26, 2006|title=Tropical Storm Danielle Discussion Twenty-Five|url=http://www.nhc.noaa.gov/archive/2004/dis/al042004.discus.025.shtml}}</ref> After holding on as a minimal tropical storm, Danielle finally lost its deep convection due to high upper-level vertical shear<ref>{{cite web|author=Avila|publisher=National Hurricane Center|date=August 20, 2004|accessdate=October 26, 2006|title=Tropical Depression Danielle Discussion Thirty|url=http://www.nhc.noaa.gov/archive/2004/dis/al042004.discus.030.shtml}}</ref> and was downgraded to a tropical depression on the afternoon of August 20.<ref name="DanielleTCR"/> The depression turned once again to the north, and continued to lose organization over cooler water. It degenerated into a remnant low on the afternoon of August 21 as the convection was completely sheared away from the center of Danielle.<ref>{{cite web|author=Avila|publisher=National Hurricane Center|date=August 21, 2004|accessdate=October 26, 2006|title=Tropical Depression Danielle Discussion Thirty-Three|url=http://www.nhc.noaa.gov/archive/2004/dis/al042004.discus.033.shtml}}</ref> The remnant low remained in the open ocean, remaining devoid of any deep convection, until August 24 when it dissipated west-southwest of the Azores.<ref name="DanielleTCR"/> |
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==Impact, naming, and records== |
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Hurricane Danielle did not have any impact on land and no damage or fatalities were reported. No ships were reported to have come into contact with Danielle.<ref name="DanielleTCR"/> When Danielle became a tropical storm at 24.8°W, it was the farthest east that a storm had received a name since [[Hurricane Alberto (2000)|Hurricane Alberto]] in the [[2000 Atlantic hurricane season]].<ref>{{cite web|author=William M. Gray and Philip J. Klotzbach|publisher=Colorado State University|date=November 19, 2004|accessdate=October 26, 2006|title=Summary of the 2004 Atlantic Tropical Cyclone Activity and Verification of Author's Seasonal and Monthly Forecasts|url=http://hurricane.atmos.colostate.edu/forecasts/2004/nov2004/|archive-url=https://web.archive.org/web/20130614203629/http://hurricane.atmos.colostate.edu/forecasts/2004/nov2004/|archive-date=June 14, 2013|url-status=dead}}</ref> |
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==See also== |
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{{Portal|Tropical cyclones}} |
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* [[Hurricane Danielle (disambiguation)|Other storms of the same name]] |
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==References== |
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{{Reflist}} |
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==External links== |
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{{Commons category}} |
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* NHC's {{NHC TCR url|id=AL042004_Danielle|title=Tropical Cyclone Report}} on Hurricane Danielle |
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{{2004 Atlantic hurricane season buttons}} |
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{{Good article}} |
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[[Category:2004 Atlantic hurricane season|Danielle]] |
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[[Category:Cape Verde hurricanes|Danielle (2004)]] |
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[[Category:Category 2 Atlantic hurricanes|Danielle (2004)]] |
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[[Category:Tropical cyclones in 2004|Danielle]] |
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Revision as of 06:01, 14 March 2021
