Alert archive / Illinois / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 76, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Aug 3, 1991, 5:06 PM CDT for Randolph County, Illinois. It was in force for 54 min.
The area
The counties it named.
The facts
- Issued
- Aug 3, 1991, 5:06 PM CDT (22:06 UTC)
- Expired
- Aug 3, 1991, 6:00 PM CDT
- In force
- 54 min
- Issued by
- NWS St. Louis, MO
- Area
- Whole counties
County Randolph County, IL
The nearest sounding before it
Paducah/Barkley, KY (KPAH), launched 12:00Z, 10.1 hours before the alert went out and 147 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
- 0 m above ground
- 0-6 km bulk shear
- 5 kt
- 0-1 km storm-relative helicity
- -52 m²/s²
- 0-3 km storm-relative helicity
- 58 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, Aug 3, 1:38 PM CDT, 3 hours 28 minutes before
MOZ011-012-032300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 135 PM CDT SAT AUG 3 1991 ...HEAT ADVISORY IS IN EFFECT FOR EAST-CENTRAL MISSOURI THIS AFTERNOON... THE NATIONAL WEATHER SERVICE HAS ISSUED A HEAT ADVISORY FOR EAST CENTRAL MISSOURI INCLUDING THE ST LOUIS METROPOLITAN AREA FOR THIS AFTERNOON. DAYTIME HIGHS ARE EXPECTED TO BE AROUND 100 DEGREES. THE COMBINATION OF THIS INTENSE HEAT AND HIGH HUMIDITY WILL RESUL,T IN HEAT INDICES IN THE 105 TO 110 DEGREE RANGE. PLEASE EXERCISE CAUTION IF YOU ENGAGE IN OUTDOOR ACTIVITIES. DRINK PLENTY OF FLUIDS AND TAKE FREQUENT BREAKS IN THE SHADE OR AIR CONDITIONED PLACES IF POSSIBLE. SMALL
Special weather statement, Aug 3, 3:31 PM CDT, 1 hour 35 minutes before
MOZ011-012-017-018-032130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 325 PM CDT SAT AUG 3 1991 AT 320 PM CDT...STRONG THUNDERSTORMS WERE SCATTERED OVER PARTS OF SOUTHWEST ILLINOIS AND EAST CENTRAL MISSOURI. THE AREA OF THUNDERSTORMS EXTENDED FROM 20 MILES NORTH OF ROLLA MISSOURI TO 15 MILES SOUTHEAST OF BELLEVILLE ILLINOIS. THE STRONGEST THUNDERSTORMS WERE LOCATED 10 MILES NORTH OF ROLLA...AND BETWEEN 15 MILES SOUTHWEST OF ST. LOUIS TO 40 MILES SOUTHEAST OF ST. LOUIS. AT 310 PM CDT...A SEVERE WEATHER SPOTTER IN WATERLOO ILLINOIS...ABOUT 15 MILES SOUTHEAST OF ST. LOUIS REPORTED WINDS GUSTING TO NEAR 50 MILES AN HOUR IN A THUNDERSTORM. BRIEF GUSTY SURFACE WINDS...HAIL...HEAVY DOWNPOURS AND DANGEROUS LIGHTNING WILL ACCOMPANY MANY OF THESE STORMS. THE THUNDERSTORMS WERE MOVING TO THE EAST AT 20 MILES AN HOUR. PRZYBYLINSKI
Special weather statement, Aug 3, 4:51 PM CDT, 15 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 |
|---|---|---|---|---|
| Aug 3, 4:48 PM CDT | Severe Thunderstorm Warning | LSX | Sainte Genevieve | 42 min |
| Aug 3, 6:31 PM CDT | Severe Thunderstorm Warning | LSX | Jefferson, Washington | 44 min |
| Aug 3, 3:38 PM CDT | Severe Thunderstorm Warning | LSX | Monroe, Saint Clair | 52 min |
| Aug 3, 4:09 PM CDT | Severe Thunderstorm Warning | LSX | Randolph | 51 min |
| Aug 3, 5:10 PM CDT | Severe Thunderstorm Warning | LSX | Jefferson, Perry | 50 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.