Peak Tropical Storm Periods in the Atlantic
When is Hurricane Season ?
The Atlantic hurricane season is "officially" from June 1st to November 30th. Peak activity is in early
to mid September--the statistical peak of the Atlantic hurricane season is 10 September.
August through October account for:
What is the chance of having a tropical storm or hurricane strike by each month?
When is Hurricane Season ?
The Atlantic hurricane season is "officially" from June 1st to November 30th. Peak activity is in early
to mid September--the statistical peak of the Atlantic hurricane season is 10 September.
August through October account for:
78% of the tropical storm days 87% of the minor hurricane days 96% of the major hurricane days.
What is the chance of having a tropical storm or hurricane strike by each month?
| All Named Storms | Hurricanes | Major Hurricanes |
| June | June | None |
| July | July | None |
| August | August | August |
| ** September ** | ** September ** | ** September ** |
| October | October | October |
| November | November | None |
**peak months**
Average landfalls for the U.S. East Coast:
Average landfalls for the U.S. East Coast:
| First Date
of Landfall |
Median Date
of Landfall |
Last Date |
| Aug. 12 | Sept. 24 | Oct. 25 |
Average monthly occurrence of tropical storms by intensity in the
Atlantic regions
(in percents of total annual)
| PERCENTAGES | |||||||||
| Intensity | Jan-Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| Tropical Storms | 0.1 | 1.7 | 6.6 | 6.2 | 20.0 | 35.5 | 22.9 | 6.3 | 0.8 |
| Minor Hurricanes | 0.3 | 0.5 | 2.6 | 4.4 | 21.6 | 46.0 | 19.8 | 4.2 | 0.6 |
| Intense Hurricanes | 0.0 | 0.1 | 0.2 | 1.7 | 21.9 | 57.2 | 16.6 | 2.3 | 0.0 |
| Named Storms | 0.2 | 1.1 | 4.5 | 5.1 | 20.8 | 41.5 | 21.1 | 5.1 | 0.6 |
| U.S. Intense Hurricanes | |||||||||
| East Coast | 0.0 | 0.0 | 0.0 | 0.0 | 11.8 | 67.6 | 20.6 | 0.0 | 0.0 |
| Gulf Coast | 0.0 | 0.0 | 5.7 | 8.6 | 31.4 | 51.4 | 2.9 | 0.0 | 0.0 |
Major Hurricane Direct Hits on the U.S. Mainland and Individual States, 1851-2006
| AREA | Jun | Jul | Aug | Sep | Oct |
All |
| U.S. Coastline (Texas to Maine) | 2 | 4 | 26 | 43 | 17 | 92 |
| Florida | 0 | 2 | 6 | 19 | 10 | 37 |
| Georgia | 0 | 0 | 1 | 1 | 1 | 3 |
| South Carolina | 0 | 0 | 2 | 2 | 2 | 6 |
| North Carolina | 0 | 0 | 4 | 7 | 1 | 12 |
| Virginia | 0 | 0 | 0 | 1 | 0 | 1 |
| Maryland | 0 | 0 | 0 | 0 | 0 | 0 |
Hurricane Research Division, Atlantic Oceanographic and Meteorological Laboratory, Ocean and Atmospheric Research,
National Oceanic and Atmospheric Administration
Does an active June and July mean the rest of the season will be busy too?
No. There is very little correlation between the number of named storms (hurricanes) occurring in June and July significant versus the enntire season's activity. In fact, there is a slight negative association of early season storms (hurricanes) versus late season, August through November.
Click here for frequency diagrams
of Tropical storms in the Atlantic region.
Sources:
FAQ : HURRICANES, TYPHOONS, AND TROPICAL CYCLONES -- FAQ
Main Page,
By Christopher W. Landsea, Version 2.10, 09 August, 2000
http://www.aoml.noaa.gov/hrd/tcfaq/tcfaqHED.html
A CLIMATOLOGY OF INTENSE (OR MAJOR) ATLANTIC HURRICANES,
By: Christopher W. Landsea, Department of Atmospheric Science,
Colorado State University, Fort Collins, Colorado 80523
Monthly Weather Review, Vol.121, pg. 1703-1713, (1993)
http://www.aoml.noaa.gov/hrd/Landsea/climo/index.html
By: Christopher W. Landsea, Department of Atmospheric Science,
Colorado State University, Fort Collins, Colorado 80523
Monthly Weather Review, Vol.121, pg. 1703-1713, (1993)
http://www.aoml.noaa.gov/hrd/Landsea/climo/index.html
