Alert archive / Illinois / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 23, NWS Chicago, IL
NWS Chicago, IL issued this severe thunderstorm warning at Aug 28, 1990, 2:32 PM CDT for Kane County, Illinois. It was in force for 58 min. 2 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Aug 28, 1990, 2:32 PM CDT (19:32 UTC)
- Expired
- Aug 28, 1990, 3:30 PM CDT
- In force
- 58 min
- Issued by
- NWS Chicago, IL
- Area
- Whole counties
County Kane County, IL
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 28, 2:55 PM CDT | Thunderstorm Wind 80 | Kane, IL | |
| Aug 28, 3:30 PM CDT | Hail 1.25 | Kane, IL |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Green Bay/Straub, WI (KGRB), launched 12:00Z, 7.5 hours before the alert went out and 284 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
- 2944 J/kg
- Mixed-layer CIN
- -18 J/kg
- Mixed-layer LCL
- 575 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 75 m²/s²
- 0-3 km storm-relative helicity
- 83 m²/s²
- Significant tornado parameter
- 1.1
- Supercell composite
- 4.9
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 28, 1:08 PM CDT, 1 hour 24 minutes before
ILZ001-002-261810- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ROCKFORD IL 105 PM CDT TUE AUG 28 1990 ...TUNDERSTORMS DEVELOP OVER EXTREMEM NORTHERN ILLINOIS... AT 1 PM A CLUSTER OF STRONG THUNDERSTORMS HAVE DEVELOPED RAPIDLY OVER EXTEREME NORTHERN ILLINOIS. THE STORMS WERE LOCATED NORTH OF A LINE FORM ORANGEVILLE TO DURAND TO ROCKTON NEAR THE ILLINOIS WISCONSIN BORDERS THEY WERE WERE MOVING TO THE EAST SOUTHEAST AT 30 MPH. BREIF HEAKVY RAINFALL STRONG GUSTY WINDS AND SMALL HAIL CAN BE EXPECTED WITH THESE STORMS. PERSONS NEAR THOSE AREAS SHOULD BE ON ALERRT FOR RAPIDLY CHANGING CONDITIONS. LIBRIZZI ATT:ISP...1..16..2
Special weather statement, Aug 28, 1:12 PM CDT, 1 hour 20 minutes before
ILZ001-002-281900- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ROCKFORD IL 105 PM CDT TUE AUG 28 1990 ...TUNDERSTORMS DEVELOP OVER EXTREME NORTHERN ILLINOIS... AT 1 PM A CLUSTER OF STRONG THUNDERSTORMS HAVE DEVELOPED RAPIDLY OVER EXTEREME NORTHERN ILLINOIS. THE STORMS WERE LOCATED NORTH OF A LINE FORM ORANGEVILLE TO DURAND TO ROCKTON NEAR THE ILLINOIS WISCONSIN BORDERS THEY WERE WERE MOVING TO THE EAST SOUTHEAST AT 30 MPH. BREIFV HEAVY RAINFALL STRONG GUSTY WINDS AND SMALL HAIL CAN BE EXPECTED WITH THESE STORMS. PERSONS NEAR THOSE AREAS SHOULD BE ON ALERRT FOR RAPIDLY CHANGING CONDITIONS. LIBRIZZI ATT:ISP...1..16..2
Special weather statement, Aug 28, 1:26 PM CDT, 1 hour 6 minutes before
ILZ001-002-281900- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ROCKFORD IL 125 PM CDT TUE AUG 28 1990 ...STRONG THUNDERSTORM OVER EXTREME NORTHERN ILLINOIS... AT 120 PM RADAR INDICATED A STRONG THUNDERSTORM JUST SOUTH OF DURAND ABOUT 20 MILES NORTHWEST OF THE CITY OF ROCKFORD MOVING TOWARDS THE EAST AT 30 MPH. THIS STORM WILL BRING BRIEF HEAVY RAINFALL ALONG WITH STRONG GUSTY WINDS AND SMALL HAIL. THE STORM WILL MOVE THROUGH THE NORTHERRN PORTIONS OF THE CITY OF ROCKFORD INTO BOONE COUNTY BY 2 PM . PERSONS IN OR NEAR NEAR THOSE AREAS SHOULD BE ON ALERT FOR RAPIDLY CHANGING CONDITIONS. LIBRIZZI ATT:ISP...1..16..2
Special weather statement, Aug 28, 2:01 PM CDT, 31 minutes before
ILZ003-201200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHICAGO IL 2 00 PM CDT TUE AUG 28 1990 A SEVERE THUNDERSTORM WATCH HAS BEEN POSTED FOR NORTHERN ILLINOIS INCLUDING THE CHICAGO AREA FOR THIS AFTERNOON AND EARLY EVENING. A COLD FRONT MOVING SOUTH FROM WISCONSIN HAS FORCED THUNDERSTORMS TO DEVELOP IN SOUTHERN WISCONSIN AND NORTHERN ILLINOIS. AT 2 PM THE THUNDERSTORMS WERE LOCATED IN A LINE FROM JUST SOUTH OF MILWAUKEE TO JUST WEST OF ROCKFORD AND HAD ENTERED THE EXTREME NORTH AND NORTHEST PORTIONS OF THE CHICAGO SUBURBAN AREAS. THE LINE OF THUNDERSTORMS ARE SLIPPING SOUTHEAST AND WILL MOVE ACROSS THE CHICAGO AREA BETWEEN 2 AND 6 PM. SOME OF THE THUNDERSTORMS MAY BE SEVERE2 AND PRODUCE STRONG WINDS AND LARGE HAIL. BE ALERT FOR RAPIDLY CHANGING AND THREATENING WEATHER AND BE PREPARED TO SEEK SHELTER AS NECESSARY. SOMREK
The office that day
Everything else NWS Chicago, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 28, 3:37 PM CDT | Severe Thunderstorm Warning | LOT | DuPage, Kane, Kendall, Will | 68 min |
| Aug 28, 3:51 PM CDT | Tornado Warning | LOT | Will | 69 min |
| Aug 28, 4:31 PM CDT | Severe Thunderstorm Warning | LOT | Kankakee | 59 min |
| Aug 28, 6:15 PM CDT | Severe Thunderstorm Warning | LOT | LaSalle | 60 min |
| Aug 28, 4:50 PM CDT | Tornado Warning | LOT | Lake | 25 min |
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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.