Alert archive / Illinois / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 1, NWS Chicago, IL

March 13, 1990Grundy County, Will County, Illinois

NWS Chicago, IL issued this severe thunderstorm warning at Mar 13, 1990, 12:29 PM CST for Grundy County, Will County, Illinois. It was in force for 61 min.

The area

The counties it named.

The facts

Issued: Mar 13, 1990, 12:29 PM CST (18:29 UTC)
Expired: Mar 13, 1990, 1:30 PM CST
In force: 61 min
Issued by: NWS Chicago, IL
Area: Whole counties

Counties Grundy County, IL, Will 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

Green Bay/Straub, WI (KGRB), launched 12:00Z, 6.5 hours before the alert went out and 346 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1706 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 1 m²/s²
0-3 km storm-relative helicity: 45 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 13, 11:36 AM CST, 53 minutes before

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Special weather statement, Mar 13, 11:37 AM CST, 52 minutes before

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Special weather statement, Mar 13, 11:39 AM CST, 50 minutes before

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Special weather statement, Mar 13, 11:47 AM CST, 42 minutes before

ILZ-001-002-131830

SPECIAL WEATHER STATEMENT...CORRECTION...
NATIONAL WEATHER SERVICE ROCKFORD IL
11 38 AM CST TUE MAR 13 1990

...STRONG THUNDERSTORM MOVING OUT OF SOUTHERN BOONE COUNTY...
...STRONG THUNDERSTORM ALSO MOVING INTO CENTRAL DE KALB COUNTY...

AT 11 25 AM CST...RADAR INDICATED A STRONG THUNDERSTORM OVER THE
SOUTHEASTERN PORTION OF BOONE COUNTY...ABOUT 10 MILES SOUTHEAST OF
BELVIDERE OR ABOUT 20 MILES SOUTHEAST OF ROCKFORD. MARBLE SIZED HAIL
WAS REPORTED IN THIS STORM BY THE BOONE COUNTY SHERRIFS DEPARTMENT.
THE STROM WAS MOVING TO THE NORTHEAST AT 40 MPH...INTO SOUTHWESTERN
MC HENDRY COUNTY.
ANORTHER STORM WAS ALSO MOVING INTO CENTRAL DEKALB COUNTY FROM NORTH-
EASTERN LEE COUNTY. THE ILLINOIS STATE POLICE REPORTED PEA SIZED HAIL
WITH THIS STORM AROUND 8 MILES SOUTH OF ROCHELLE...OR ABOUT 28 MILES
SOUTH OF ROCKFORD. PERSONS IN CENTRAL DE KALB COUNTY CAN EXPECT SMALL
HAIL AND STRONG GUSTY WINDS FROM THIS THUNDERSTORM DURING THE NEXT HALF
HOUR.

ATTN ISP DIST...1.
SANDERS

Special weather statement, Mar 13, 11:49 AM CST, 40 minutes before

ILZ003-151900-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHICAGO IL
11 45 AM CST TUE MAR 13 1990

AT 11 45 AM A STRONG THUNDERSTORM WAS LOCATED 8 MILES WEST OF CRYSTAL
LAKE ILLINOIS OR 45 MILES NORTHWEST OF DOWNTOWN CHICAGO WITH HAIL.

THIS STORM WAS MOVING EAST NORTHEAST AT 40 MPH AND THE FOLLOWING
TOWNS OF WAUCONDA...LIBERTYVILLE...WAUKEGAN ARE IN THE PATH OF THIS
STORM.

MORRISON

Special weather statement, Mar 13, 11:53 AM CST, 36 minutes before

ILZ003-151900-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHICAGO IL
11 53 AM CST TUE MAR 13 1990

AT 11 45 AM A STRONG THUNDERSTORM WAS LOCATED JUST NORTH OF ODELL IN
NORTHERN LIVINGSTON COUNTY OR ABOUT 35 MILES WEST OF KANKANKEE. HAIL
IS LIKELY WITH THIS STORM AS IT MOVES EAST NORTHEAST AT 40 MPH.

THE STORM IS MOVING TOWARD UNION HILL AND SHOULD PASS JUST NORTH OF
KANKAKEE.

MORRISON

The office that day

Everything else NWS Chicago, IL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 13, 3:24 PM CST	Severe Thunderstorm Warning	LOT	McHenry	36 min

Nearby

Severe Thunderstorm Warnings in Illinois, 1990 Every 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.