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Methodology
In an attempt to objectively determine the spatial distribution of severe weather reports, a 40km grid was constructed across the contiguous United States. The SPC Severe Thunderstorm and Tornado Database was then written to the grid. The resulting fields are shown in these graphs. A 40km grid size was chosen to best represent a typical county or parish.
 
 Severe Thunderstorms
All
Tornadoes
Wind
Hail

 
 Significant Severe Thunderstorms
All
F2+ Tornadoes
65 knot+ Wind
2"+ Hail

 
 Tornadoes
Killers
Long Track
Causing Injury
F0-F2 Killers
F0-F1
F2-F3
F4-F5
F3+, No Deaths

 
 Monthly Distributions
  January
February
March
April
May
June
July
August
September
October
November
December
ALL  
ALL
ALL
ALL
ALL
ALL
ALL
ALL
ALL
ALL
ALL
ALL
TORN  
TORN  
TORN  
TORN  
TORN  
TORN  
TORN  
TORN  
TORN  
TORN  
TORN  
TORN  
HAIL  
HAIL
HAIL
HAIL
HAIL
HAIL
HAIL
HAIL
HAIL
HAIL
HAIL
HAIL
WIND  
WIND
WIND
WIND
WIND
WIND
WIND
WIND
WIND
WIND
WIND
WIND

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Page last modified: March 06, 2006
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