Alert archive / Illinois / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 1, NWS Lincoln, IL
NWS Lincoln, IL issued this severe thunderstorm warning at Mar 22, 1991, 8:30 PM CST for Knox County, Warren County, Illinois. It was in force for 25 min.
The area
The counties it named.
The facts
- Issued
- Mar 22, 1991, 8:30 PM CST (02:30 UTC)
- Expired
- Mar 22, 1991, 8:55 PM CST
- In force
- 25 min
- Issued by
- NWS Lincoln, IL
- Area
- Whole counties
Counties Knox County, IL, Warren County, IL
The nearest sounding before it
Green Bay/Straub, WI (KGRB), launched 00:00Z, 2.5 hours before the alert went out and 442 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
- 521 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- 223 m²/s²
- 0-3 km storm-relative helicity
- 281 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 22, 6:19 PM CST, 2 hours 11 minutes before
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</html>Special weather statement, Mar 22, 7:14 PM CST, 1 hour 16 minutes before
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The site you requested is temporarily down for maintenance or an unexpected outage.
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</html>Special weather statement, Mar 22, 8:08 PM CST, 22 minutes before
ILZ005>007-009-230305- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PEORIA IL 805 PM CST FRI MAR 22 1991 ...TORNADO WATCH NUMBER 58 IN EFFECT FOR MUCH OF WEST CENTRAL ILLINOIS UNTIL 11PM CST... ...SEVERE THUNDERSTORM WARNING IN EFFECT FOR HENDERSON COUNTY UNTIL 845 PM... AT 800 PM CST... RADAR INDICATED A LINE OF THUNDERSTORMS FROM MOLINE SOUTH TO BURLINTON WITH THE STRONGEST STORMS LOCATED BETWEEN OQUAWKA AND BALD BLUFF IN HENDERSON COUNTY. ANOTHER AREA OF THUNDERSTORMS HAS DEVELOPED ON THE BORDERS OF MCDONOUGH AND HANCOCK COUNTIES. THE STRONGEST STORMS WERE MOVING INTO THE BLANDESVILLE AREA IN MCDONOUGH COUNTY. ALL THE STORMS CONTINUE TO MOVE TO THE NORTHEAST AT 35 MPH. 0 MOGGED
The office that day
Everything else NWS Lincoln, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 22, 9:47 PM CST | Severe Thunderstorm Warning | ILX | McLean | 33 min |
| Mar 22, 9:49 PM CST | Tornado Warning | ILX | Bureau, Stark | 31 min |
| Mar 22, 11:33 PM CST | Tornado Warning | ILX | Vermilion | 32 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.