Jefferson County - East-West Gateway Coordinating Council

A Regional Overview All-Hazard Mitigation Plan 65
January
FIGURE J42 TORNADO OCCURRENCES
Source: NOAA
TABLE J38 OCCURRENCES OF TORNADOES IN JEFFERSON COUNTY
FROM 1950 TO 1998
February
Intensity or Strength
March
April
May
June
0 0 0 8 7 2 2 0 1 1 1 1
Storms in Jefferson County range from F0 to F4. There have been no recorded F5 storms.
Refer to Table J39 and Figure J43 below.
TABLE J39 STORM INTENSITIES FOR JEFFERSON COUNTY
JURISDICTIONS F0 F1 F2 F3 F4 Total
St. Louis City 0 2 3 2 2 9
St. Louis County 2 8 11 5 2 28
St. Charles County 6 10 11 7 1 35
Jefferson County 5 11 4 2 1 23
Franklin County 6 6 8 0 0 20
Total 19 37 37 16 6 115
Lives Lost, Injuries, Property Damage, Economic Losses/Other Losses
Even though only about 10% of tornadoes are significant, these tornadoes are responsible
for the majority of deaths caused by tornadoes in the country, with violent tornadoes
claiming 67% of the total casualties. Furthermore, the US suffers millions of dollars in
damage costs in the aftermath of such events- an important consideration for the
insurance industry.
July
August
September
October
November
December