Alert archive / Illinois / Severe Thunderstorm Warnings in 1994
Severe Thunderstorm Warning 73, NWS Lincoln, IL
NWS Lincoln, IL issued this severe thunderstorm warning at Jul 21, 1994, 5:54 PM CDT for DeKalb County, Illinois. It was in force for 31 min.
The area
The counties it named.
The facts
- Issued
- Jul 21, 1994, 5:54 PM CDT (22:54 UTC)
- Expired
- Jul 21, 1994, 6:25 PM CDT
- In force
- 31 min
- Issued by
- NWS Lincoln, IL
- Area
- Whole counties
County DeKalb County, IL
The nearest sounding before it
Green Bay/Straub, WI (KGRB), launched 12:00Z, 10.9 hours before the alert went out and 293 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
- 439 J/kg
- Mixed-layer CIN
- -54 J/kg
- Mixed-layer LCL
- 998 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 14 m²/s²
- 0-3 km storm-relative helicity
- 36 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WUUS1 KRFD 212254 RRA
SVRRFD
ILC037-212345-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ROCKFORD IL
554 PM CDT THU JUL 21 1994
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 645 PM CDT FOR PEOPLE IN THE FOLLOWING
COUNTY
IN THE NORTH CENTRAL PART OF ILLINOIS
SOUTHERN DEKALB
AT 550 PM RADAR INDICATED A SEVERE THUNDERSTORM ON THE DEKALB-
LA SALLE COUNTY LINE IN THE VICINITY OF SOMONAUK. THE CELL WAS
MOVING TO THE NORTHEAST AT 30 MPH.
SOME COMMUNITIES THAT WILL BE AFFECTED BY THIS SEVERE THUNDERSTORM...
SOMONAUK...SANDWICH...HINCKLEY
IF YOU ARE IN THE PATH OF THIS STORM...MOVE OUT OF AREAS THAT ARE
PRONE TO FLOODING AND TAKE SHELTER. DAMAGING WINDS...LARGE HAIL
AND VERY HEAVY RAIN IS IMMINENT! REMEMBER...SEVERE THUNDERSTORMS
CAN ALSO PRODUCE TORNADOES WITH LITTLE OR NO WARNING!
REHWALDWhat 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, Jul 21, 5:19 PM CDT, 35 minutes before
ILZ029-031-037-212320- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PEORIA IL 519 PM CDT THU JUL 21 1994 ...THUNDERSTORMS WILL CONTINUE TO PUSH THROUGH CENTRAL ILLINOIS... A SMALL AREA OF THUNDERSTORMS...THAT EXTENDED FROM ABOUT WASHINGTON THROUGH PEKIN TO GLASFORD...IS EXPECTED TO MOVE EAST NORTHEAST INTO WOODFORD COUNTY EARLY THIS EVENING. THE STORMS WILL BE ALONG AND SOUTH OF HIGHWAY 24 IN WOODFORD COUNTY BY 615 PM. PERIODS OF HEAVY RAIN CAN BE EXPECTED WITH THESE THUNDERSTORMS. MILLER
Special weather statement, Jul 21, 5:22 PM CDT, 32 minutes before
ILZ029-031-037-212320- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PEORIA IL 519 PM CDT THU JUL 21 1994 ...THUNDERSTORMS WILL CONTINUE TO PUSH THROUGH CENTRAL ILLINOIS... A SMALL AREA OF THUNDERSTORMS...THAT EXTENDED FROM ABOUT WASHINGTON THROUGH PEKIN TO GLASFORD...IS EXPECTED TO MOVE EAST NORTHEAST INTO WOODFORD COUNTY EARLY THIS EVENING. THE STORMS WILL BE ALONG AND SOUTH OF HIGHWAY 24 IN WOODFORD COUNTY BY 615 PM. PERIODS OF HEAVY RAI2N CAN BE EXPECTED WITH THESE THUNDERSTORMS. MILLER
The office that day
Everything else NWS Lincoln, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 6:13 PM CDT | Severe Thunderstorm Warning | ILX | McLean | 57 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 1994Every severe thunderstorm warning in 1994
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.