barry d. keim louisiana state climatologist louisiana state university hurricane history of the gulf...
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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
Dry Spells Across the South Central United States
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
Time-Space Continuum of Hurricanes in U.S and Mexico
What’s driving the increased storm counts?
Atlantic Multidecadal Oscillation Index
Hurricane Observing Platforms Over Time
Open AtlanticOcean Differences
1933 Hurricane Season
2005 Hurricane Season
Source: Landsea (2007)
The 2 most active seasons
on record
Galveston 1900
Hurricane Ike 2008
Sunset at Cameron, LA