Tornado Warnings in Missouri, 2012

By month

20 of 86 tornado warnings covering Missouri in 2012 had a tornado report inside them; 28 of 41 tornado reports fell inside a warning, on average 18 minutes after it went out.

Missouri, 2012

Each office's whole area, 2012

An office's figures cover every county it serves, including across state lines.

Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.

• Bollinger County12
• Scott County9
• Stoddard County9
• Cape Girardeau County8
• Dunklin County7
• Mississippi County6
• New Madrid County6
• Pemiscot County6
• Butler County5
• Wayne County5
• Saint Charles County5
• Dallas County4
• Jefferson County4
• Ripley County4
• Polk County3
• Phelps County3
• Franklin County3
• Saint Louis County3
• Barton County3
• Dade County3
• Laclede County3
• Hickory County2
• Camden County2
• Miller County2
• Maries County2
• Pulaski County2
• Crawford County2
• Washington County2
• Greene County2
• Barry County2
• Douglas County2
• Madison County2
• Lincoln County2
• Carter County2
• St. Clair County1
• Gasconade County1
• Osage County1
• Cedar County1
• Vernon County1
• Webster County1

1. February 29, 201224tornado warnings
2. September 1, 201216tornado warnings
3. January 17, 201214tornado warnings
4. August 31, 20125tornado warnings
5. March 2, 20124tornado warnings
6. September 6, 20123tornado warnings
7. September 7, 20123tornado warnings
8. April 5, 20122tornado warnings
9. June 4, 20122tornado warnings
10. October 14, 20122tornado warnings
11. October 17, 20122tornado warnings
12. March 20, 20121tornado warnings

Alerts in force nowTornadoes on recordThe radar archive20112013

National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.