Tag Archives: Hurricanes

2015 Atlantic Hurricane Season Forecast

The first early forecast for the 2015 hurricane season has been released by the Colorado State University Tropical Meteorology Project, predicting another quiet year:

We anticipate that the 2015 Atlantic basin hurricane season will be one of the least active seasons since the middle of the 20th century.
It appears quite likely that an El Niño of at least moderate strength will develop this summer and fall.
The tropical and subtropical Atlantic are also quite cool at present.
We anticipate a below-average probability for major hurricanes making landfall along the United States coastline and in the Caribbean.

– Drs Philip J. Klotzbach and William M. Gray, Colorado State University, April 9, 2015

Atlantic Hurricane Season April 2015 forecastAverage
Named storms (>35mph winds)  7
12
Hurricanes (>72mph winds)  3  6.5
Major hurricanes (>111mph winds)  1   2
US landfall likelihood28%52%
Gulf Coast landfall probability15%30%
Major Hurricane in Caribbean probability22%42%
Manatee County hurricane landfall probability *0.3%0.7%
Manatee County tropical storm probability*8.1%17.1%
Manatee County >75mph wind gusts probability*2.3%5.0%

http://landfalldisplay.geolabvirtualmaps.com

Early season forecasts are based on historical statistics and computer models that predict outcomes using climatological conditions present in January to March. The CSU model has been accurate in predicting above or below average seasons 23 out of 33 times, or 70%.

Measurements used include sea surface temperature, sea level pressure, and zonal wind strengths. Eastern tropical Pacific conditions in August to October, such as weak trades, low SST and SLP, are associated with La Nina formation, which is conducive to high activity in the tropical Atlantic. High SST, SLP and strong trades prevent warm air propagating from Western Pacific to the tropical Atlantic area and is referred to as El Nino, which correlates to a quieter Caribbean summer.

2015 Western Pacific Sea Surface Temperature Anomaly - El Nino

2015 Western Pacific Sea Surface Temperature Anomaly – El Nino

Continue reading “2015 Atlantic Hurricane Season Forecast” »

2014 Atlantic Hurricane Season Review

2014 Atlantic Storm tracks

2014 Atlantic Storm tracks

Summary:

  • Below average activity with fewest named storms since 1997
  • No effects on Anna Maria Island
  • No landfalls on Florida
  • 1 Gulf of Mexico storm (TS Dolly)
  • 1 US mainland landfall (Arthur)
  • 2 major hurricanes (Cat 3 Edouard and Cat 4 Gonzalo)
  • The US broke a record of 9 years without a major hurricane landfall. The last major hurricane to make US landfall was Wilma (2005). The previous record of eight years was from 1861-1868.
  • Florida broke a record of 9 years without a hurricane impact (since 1851). The previous record of five years was from 1980-1984.
Atlantic Hurricane Season June 2014 forecast 2014 Actual
Named storms (>35mph) 10 8
Hurricanes (>72mph) 4 6
Major hurricanes (>111mph) 1 2
US landfall likelihood 40% 12%
Gulf Coast landfall 23% 12%

Continue reading “2014 Atlantic Hurricane Season Review” »

2014 Atlantic Hurricane Season Forecast

The 2014 hurricane season has arrived and the extended range summer analysis forecasts below-average activity and landfall strike possibility.

“We continue to foresee a below-average 2014 Atlantic hurricane season. The tropical Atlantic remains slightly cooler than normal, while El Niño is in the process of developing. However, the transition to El Niño has slowed some in recent weeks, and the tropical Atlantic has anomalously warmed, causing us to increase our forecast slightly. We are still calling for a below-average probability of United States and Caribbean major hurricane landfall.”

Drs Philip J. Klotzbach and William M. Gray, Colorado State University, June 2, 2014

Atlantic Hurricane Season June 2014 forecastAverage
Named storms (>35mph winds) 10
12
Hurricanes (>72mph winds)  4  6.5
Major hurricanes (>111mph winds)  1   2
US landfall likelihood40%52%
Gulf Coast landfall probability23%30%
Manatee County hurricane landfall probability0.5%0.7%
Manatee County tropical storm probability12.3%17.1%
Manatee County >75mph wind gusts probability3.5%5.0%

Information obtained through May 2014 indicates that the 2014 Atlantic hurricane season will have less activity than the median 1981-2010 season. The probability of U.S. major hurricane landfall is estimated to be about 80 percent of the long-period average. An anticipated below-average Atlantic basin hurricane season is due to the likelihood of El Niño development along with a slighter cooler than normal tropical Atlantic.

Continue reading “2014 Atlantic Hurricane Season Forecast” »

2013 Atlantic Hurricane Season Review

2013 Atlantic Storm Tracks

2013 Atlantic Storm Tracks

Summary:

  • The 2013 Atlantic hurricane season was the least active season so far this century, and
    the quietest on record since 1950.
  • No effects on Anna Maria Island.
  • 1 storm made US landfall in NW Florida (T.S. Andrea).
  • 2 hurricanes barely reached Cat 1 (Humberto, Ingrid).
  • Season’s latest recorded hurricane since 1960 (Humberto, September 11th).
  • Fewest hurricanes per named storms in historical records.
  • No “major hurricanes” (Cat 3 or higher).
  • Lowest Accumulated Cyclone Energy since 1983.
Atlantic Hurricane Season June 2013 forecast 2013 Actual
Named storms (>35mph) 18 13
Hurricanes (>72mph) 8 2
Major hurricanes (>111mph) 3 0
US landfall likelihood 72% 7%
Gulf Coast landfall 47% 7%

The Named Storms

Andrea – Tropical Storm,  June 5-7, 55kn wind, landfall ‘Big Bend’ of Florida.

Barry – Tropical Storm,  June 17-19, 40kn wind, landfall Belize; then Veracruz, Mexico.

Continue reading “2013 Atlantic Hurricane Season Review” »

2013 Atlantic Hurricane Season Forecast

The 2013 Atlantic basin hurricane forecast from Drs. Philip J. Klotzbach and William M. Gray at the Department of Atmospheric Science, Colorado State University in Fort Collins, Colorado, was released April 10. The forecast anticipates enhanced activity compared to 1981-2010 climatological averages.

“The tropical Atlantic has anomalously warmed over the past several months, and it appears that the chances of an El Niño event this summer and fall are unlikely. We anticipate an above-average probability for major hurricanes making landfall along the United States coastline and in the Caribbean.”

Atlantic Hurricane SeasonApril August 2013 forecast1981 – 2010 average
Named storms (>35mph winds) 18    18
12
Hurricanes (>72mph winds) 9        8
6.5
Major hurricanes (>111mph winds) 4        3
2
US landfall likelihood72%52%
Gulf Coast landfall probability47%30%
Manatee County hurricane landfall probability1.7%0.7%
Manatee County tropical storm probability27.9%17.1%
Manatee County >75mph wind gusts probability8.5%5.0%
Florida hurricane tracks since 1851

Florida hurricane tracks since 1851

Continue reading “2013 Atlantic Hurricane Season Forecast” »