Alert archive / Illinois / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 16, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Mar 21, 1991, 3:31 PM CST for Madison County, Illinois. It was in force for 44 min.
The area
The counties it named.
The facts
- Issued
- Mar 21, 1991, 3:31 PM CST (21:31 UTC)
- Expired
- Mar 21, 1991, 4:15 PM CST
- In force
- 44 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
County Madison County, IL
The nearest sounding before it
Paducah/Barkley, KY (KPAH), launched 12:00Z, 9.5 hours before the alert went out and 222 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 978 m above ground
- 0-6 km bulk shear
- 65 kt
- 0-1 km storm-relative helicity
- 362 m²/s²
- 0-3 km storm-relative helicity
- 384 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Mar 21, 2:09 PM CST, 1 hour 22 minutes before
MOZALL-222210- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 205 PM CST THU MAR 21 1991 ...TORNADO WATCH IN EFFECT UNTIL 7 PM FOR MOST OF SOUTHWEST MISSOURI... SEVERE THUNDERSTORMS DEVELOPED OVER PORTIONS OF SOUTHWEST MISSOURI DURING THE EARLY AFTERNOON ON THURSDAY. A NUMBER OF SEVERE THUNDERSTORM WARNINGS WERE ISSUED FOR THAT AREA. AT 2 PM ON WEATHER RADAR...STRONG THUNDERSTORMS WERE ALSO LOCATED 20 MILES SOUTHEAST OF ROLLA...NEAR COOK STATION...IN SOUTHWEST CRAWFORD COUNTY. THIS STORM WAS MOVING TO THE NORTHEAST AT 40 MPH AND WILL MOVE INTO THE KEYSVILLE AND CHERRYVILLE AREAS BY 220 PM. DURING THE REST OF THE AFTERNOON...SEVERE THUNDERSTORMS WILL REMAIN POSSIBLE OVER ALL OF THE SOUTHERN HALF OF MISSOURI. A TORNADO WATCH CONTINUES FOR SOUTHWEST MISSOURI UNTIL 7 PM. TORNADOES CAN OFTEN OCCUR WITH NO ADVANCED WARNING. REMAIN ALERT TO RAPIDLY CHANGING WEATHER SITUATIONS AND STAY TUNED TO NOAA WEATHER RADIO OR LOCAL TV BROADCASTS FOR LATER STATEMENTS OR WARNINGS. GOETSCH
Special weather statement, Mar 21, 2:35 PM CST, 56 minutes before
MOZ013-014-212130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE COLUMBIA MO 230 PM CDT THU APR 21 1991 ...A TORNADO WATCH IS IN EFFECT FOR SOUTHERN AND EASTERN MISSOURI UNTIL 800 PM... AT 230 PM THE COLUMBIA WEATHER RADAR INDICATED A DANGEROUS STORM MOVING ACROSS THE LAKE OF THE OZARK...40 SOUTHWEST OF JEFFERSON CITY. THE STORM WAS MOVING NORTHEAST AT 40 MILES AN HOUR. OTHER THUNDERSTORMS WERE LOCATED 30 MILES SOUTH OF SEDALIA AND 50 EAST OF ROLLA. PERSONS IN WESTERN MORGAN AND NORTHERN MILLER COUNTY SHOULD BE ON THE ALERT FOR CHANGING WEATHER CONDITIONS. HAIL...BRIEF HEAVY SHOWERS... STRONG GUSTY WINDS...AND DANGEROUS LIGHTNING WILL ACCOMPANY THESE STORMS AS THEY MOVE THROUGH CENTRAL MISSOURI. A LAKE WIND ADVISORY IS ALSO IN EFFECT. PERLOW
Special weather statement, Mar 21, 3:15 PM CST, 16 minutes before
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</html>The office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 21, 2:23 PM CST | Severe Thunderstorm Warning | LSX | Washington | 52 min |
| Mar 21, 2:43 PM CST | Severe Thunderstorm Warning | LSX | Saint Francois | 47 min |
| Mar 21, 2:51 PM CST | Severe Thunderstorm Warning | LSX | Franklin, Jefferson | 54 min |
| Mar 21, 2:57 PM CST | Severe Thunderstorm Warning | LSX | Saint Louis, City of Saint Louis | 33 min |
| Mar 21, 3:08 PM CST | Severe Thunderstorm Warning | LSX | Sainte Genevieve, Saint Francois | 52 min |
| Mar 21, 3:22 PM CST | Severe Thunderstorm Warning | LSX | Randolph | 38 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 1991Every severe thunderstorm warning in 1991
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.