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Barry D. Keim
Louisiana State Climatologist
Louisiana State University
Hurricane History of the Gulf and East Coast of
the U.S.
Nashville Storm and FloodingMay 1-2, 2010
• 19.7 Inches in 60 Hours
• Estimated as > 1000 year event
• Within 90% of PMP Estimates
Spatial Pattern of Temperature TrendsDecreasing Trend in Days with Max T > 95 F
Increasing Trend in Min T > 75 FReduction in the Diurnal Temperature Range
Precipitation Indices Across the Southeastern U.S.
Rainfall Intensity is IncreasingDefined as Total Annual Precip Divided by # of Rain
Days
State No. of Counties
1900 1950 2000
Florida 23 175,000 841,000 4,916,000
Alabama 2 76,000 272,000 540,000
Mississippi 3 50,000 127,000 364,000
Louisiana 11 474,000 930,000 1,611,000
Texas 14 178,000 1581,000 5,006,000
Total 53 953,000 3,751,000 12,437,000
Population of U.S. coastal Counties/Parishes
Gulf of Mexico in 1900, 1950, and 2000.
CSU: Bill Gray and Phillip Klotzbach
In 2014, so far: 8 Named Storms 6 Hurricanes 2 Major Hurricanes
Open AtlanticOcean Differences
1933 Hurricane Season
2005 Hurricane Season
Source: Landsea (2007)
The 2 most active seasons
on record