Alert archive / Illinois / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 74, NWS Lincoln, IL

July 21, 1994McLean County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Jul 21, 1994, 6:13 PM CDT for McLean County, Illinois. It was in force for 57 min.

The area

The counties it named.

The facts

Issued
Jul 21, 1994, 6:13 PM CDT (23:13 UTC)
Expired
Jul 21, 1994, 7:10 PM CDT
In force
57 min
Issued by
NWS Lincoln, IL
Area
Whole counties

County McLean County, IL

The nearest sounding before it

Paducah/Barkley, KY (KPAH), launched 12:00Z, 11.2 hours before the alert went out and 381 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.

Skew-T log-pSkew-T log-p diagram, Paducah/Barkley, KY at 12:00Z on 1994-07-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1946 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Paducah/Barkley, KY at 12:00Z on 1994-07-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 22 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1946 J/kg
Mixed-layer CIN
-40 J/kg
Mixed-layer LCL
860 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
22 m²/s²
0-3 km storm-relative helicity
28 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KPIA 212314 RRA
SVRPIA
ILC113-220015-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PEORIA IL
613 PM CDT THU JUL 21 1994
 
THE NATIONAL WEATHER SERVICE IN PEORIA HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  715 PM CDT
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN CENTRAL ILLINOIS
 
   ...NORTHERN MCLEAN COUNTY
 
AT 610 PM...RADAR INDICATED A SEVERE THUNDERSTORM IN NORTHWEST MCLEAN
COUNTY NEAR THE TOWN OF CARLOCK...10 MILES NORTHWEST OF BLOOMINGTON.
THIS STORM WILL MOVE TO THE EAST-NORTHEAST AROUND 25 MPH AND PRODUCE
GUSTY WINDS...VERY HEAVY RAIN AND POSSIBLY LARGE HAIL. TOWNS IN THE PATH
OF THIS STORM INCLUDE HUDSON AND LEXINGTON.
 
THIS IS A DANGEROUS STORM! STAY INDOORS, AWAY FROM WINDOWS!
 
MILLER

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, Jul 21, 5:19 PM CDT, 54 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, 51 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.

IssuedProductOfficeCountiesLasted
Jul 21, 5:54 PM CDTSevere Thunderstorm WarningILXDeKalb31 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.