Alert archive / Illinois / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 27, NWS Chicago, IL
NWS Chicago, IL issued this severe thunderstorm warning at Aug 29, 1990, 1:47 AM CDT for Ford County, Iroquois County, Illinois. It was in force for 58 min.
The area
The counties it named.
The facts
- Issued
- Aug 29, 1990, 1:47 AM CDT (06:47 UTC)
- Expired
- Aug 29, 1990, 2:45 AM CDT
- In force
- 58 min
- Issued by
- NWS Chicago, IL
- Area
- Whole counties
Counties Ford County, IL, Iroquois County, IL
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Dayton/James M C, OH (KDAY), launched 00:00Z, 6.8 hours before the alert went out and 335 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
- 1965 J/kg
- Mixed-layer CIN
- -35 J/kg
- Mixed-layer LCL
- 1458 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 61 m²/s²
- 0-3 km storm-relative helicity
- 99 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 6.6
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KCHI 290647
SVRCHI
ILC053-075-290745-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHICAGO IL
147 AM CDT WED AUG 29 1990
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 245 AM CDT FOR PEOPLE IN THE FOLLOWING
COUNTIES
IN THE EAST CENTRAL PART OF ILLINOIS
NORTHERN FORD...SOUTHERN IROQUOIS
AT 1 39 AM CDT NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE
THUNDERSTORM JUST NORTH OF PIPER CITY IN FORD COUNTY. THE STORM
WAS MOVING SOUTHEAST AT ABOUT 25 MPH.
DAMAGING HAIL AND WINDS ARE POSSIBLE WITH THIS STORM AS IT MOVES
ACROSS NORTHERN FORD AND SOUTHWEST IROQUOIS COUNTY.
ONARGA...WOODWORTH...GOODWINE...A_ND MILFORD IN IROQUOIS COUNTY ARE
IN THE PATH OF THIS STORM. PIPER CITY IN NORTHERN FORD COUNTY WILL_
ALSO BE AFFECTED.
AT CULLON IN EAST CENTRAL LIGINGSTON COUNTY STATE POLICE REPORTED
GOLF BALL HAIL AT 1 40 AM.
KOENEMAN
ATTN ISP 21What 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 28, 8:36 PM CDT, 5 hours 11 minutes before
ILZ001-002-290200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ROCKFORD IL 830 PM CDT TUE AUG 28 1990 ...SEVERE THUNDERSTORM WATCH FOR NORTHERN ILLINOIS CANCELLED... THE SEVERE THUNDERSTORM WATCH FOR NORTHERN ILLINOIS WAS CANCELLLED THIS EVENING. THUNDERSTORMS HAD MOVED INTO CENTRAL ILLINOIS. THE STORMS WERE IN ADVANCE OF A SOUTHWARD MOVING COLD FRONT WHICH HAD MOVED THROUGH THE STATELINE AREA AT 700 PM CDT. PETROVICH FIELDS ATTN: ISP 1..2..16
Special weather statement, Aug 28, 8:38 PM CDT, 5 hours 9 minutes before
ILZ001-002-290200- SPECIAL WEATHER STATEMENT...CORRECTED... NATIONAL WEATHER SERVICE ROCKFORD IL 830 PM CDT TUE AUG 28 1990 ...SEVERE THUNDERSTORM WATCH FOR NORTHERN ILLINOIS CANCELLED... THE SEVERE THUNDERSTORM WATCH FOR NORTHERN ILLINOIS WAS CANCELLLED THIS EVENING. THUNDERSTORMS HAD MOVED INTO CENTRAL ILLINOIS. THE STORMS WERE IN ADVANCE OF A SOUTHWARD MOVING COLD FRONT WHICH HAD MOVED THROUGH THE STATELINE AREA AT 700 PM CDT. PETROVICH
Special weather statement, Aug 29, 1:04 AM CDT, 43 minutes before
ILZ003-200700- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHICAGO IL 1 00 AM CDT WED AUG 29 1990 CHICAGO RADIO MEDIA REPORTED AT 12 30 AM THAT THE TOLL IN YESTERDAY/S TORNADO IN THE JOLIET AREA 3NOW STANDS AT 23 DEAD AND 353 INJURED. A CALL FROM THIS OFFICE TO THE ILLINOIS STATE POLICE CONFIRMS THAT THOSE STATISTICS ARE ACCURATE QUOTE FOR THE MOMENT UNQUOTE...AS OF 12 30 AM. KOENEMAN
Nearby
Severe Thunderstorm Warnings in Illinois, 1990Every severe thunderstorm warning in 1990
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.