This graphic produced by the Weather Underground shows all… (Weather Underground )
As the peak of the hurricane season approaches in August and September, the tropics remain quiet in July. If history is any indication, it could stay that way.
On average, one Atlantic tropical storm forms in July seven years out of every decade, with zero the other three years, according to NOAA's Atlantic Oceanographic and Meteorological Laboratory. An Atlantic hurricane meanwhile forms in July three years out of every ten, and none the other seven years.
Tropical Storm Debby, the most recent Atlantic cyclone, dissipated June 27 and the tropics have been quiet since.
It has been rare for severe hurricanes to form in the second half of July, as the Weather Underground's Jeff Masters lays out in a recent blog post. "Wind shear is typically too high and SSTs too cool in July to allow African waves in the Caribbean and tropical Atlantic to develop into tropical storms," he wrote.
A graphic Masters compiled of Atlantic storms to strike July 16-31 from 1851 to 2006, displayed above, shows its rare that any storm of significance impacts Maryland. The only ones that have come close have been tropical depressions and tropical storms. Intense hurricanes have been limited to the warmer waters of the Gulf of Mexico and Caribbean Sea.
The peak of hurricane season begins around Aug. 15 and extends for the next month. A hurricane makes landfall somewhere in the U.S. about every other year in August, two out of every three years in September and one out of every three years in October.
Forecasters are predicting the fewest hurricanes since 2009 for this year's season.
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