Alert archive / Illinois / Flash Flood Warnings in 1990

Flash Flood Warning 4, NWS Chicago, IL

November 28, 1990Cook County, DuPage County, Will County, Illinois

NWS Chicago, IL issued this flash flood warning at Nov 28, 1990, 12:00 AM CST for Cook County, DuPage County, Will County, Illinois. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued
Nov 28, 1990, 12:00 AM CST (06:00 UTC)
Expired
Nov 28, 1990, 6:00 AM CST
In force
6 hr
Issued by
NWS Chicago, IL
Area
Whole counties

Counties Cook County, IL, DuPage 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 00:00Z, 6.0 hours before the alert went out and 306 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, Green Bay/Straub, WI at 00:00Z on 1990-11-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Green Bay/Straub, WI at 00:00Z on 1990-11-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 72 square meters per square second.1939587897117Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
569 m above ground
0-6 km bulk shear
79 kt
0-1 km storm-relative helicity
72 m²/s²
0-3 km storm-relative helicity
148 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 flash flood 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, Nov 27, 6:52 PM CST, 5 hours 8 minutes before
ILZALL-280000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHICAGO IL
6 40 PM CST TUE NOV 27 1990

EFFECTIVE IMMEDIATELY THE CHICAGO AREA PORTION OF THE TORNADO WATCH
HAS BEEN CANCELLED. THE THUNDERSTORMS PRODUCING THE REPORTS OF SEVERE
WEATHER HAVE MOVED EAST AND WEAKENED...AND NO SEVERE WEATHER IS ANTICIPATED
FOR THE METRO AREA. HOWEVER THE WATCH DOES CONTINUE FOR PORTIONS OF EAST
CENTRAL AND SOUTHERN ILLINOIS.

PURPURA
Local storm report, Nov 27, 9:35 PM CST, 2 hours 25 minutes before
STORM REPORT             ...REFERENCE WT 775...
NATIONAL WEATHER SERVICE CHICAGO IL
9 35 PM CST TUE NOV 27 1990

COUNTY         TIME (CST)            EVENT

LASALLE CO     1606CST    LASALLE ESDA REPORTED DAMAGE TO A HOME AND
TSTM WIND                 OUTBUILDINGS AT LAKE HOLIDAY...NE LASALLE CO.

DU PAGE CO.    1610CST    DUPAGE AIRPORT (OMNI WX) REPORTED WIND GUSTS
TSTM WIND                 TO 55 MPH.

KANE CO.       1613CST    UNCONFIRMED TORNADOS AT GENEVA AND BATAVIA.

DU PAGE CO.    1618CST    AN INJURY TO A WOMAN WHEN DEBRIS FROM A ROOF
TSTM WIND                 BROKE THE WINDSHIELD OF HER CAR. SHE SUFFERED
                          LACERATIONS TO HER FACE AND HEAD. OTHER CARS
                          WERE TURNED OVER AND ROOFS DAMAGED.

WILL CO.       1636CST    OHARE TOWER REPORTED A GUST TO 44 KNOTS.
SIMPSON
Special weather statement, Nov 27, 11:16 PM CST, 44 minutes before
ILZ003-005-008-281000-

OVERNIGHT/S WEATHER FOR THE CHICAGO AREA AND NORTHEAST ILLINOIS
NATIONAL WEATHER SERVICE CHICAGO IL
11 25 PM CST TUE NOV 27 1990

...FLASH FLOOD WARNING TONIGHT FOR SOUTH COOK AND EAST WILL COUNTIES
AND LAKE AND PORTER COUNTIES IN NORTHWEST INDIANA...

HEAVY RAINFALL...WHICH HAS BEEN PRODUCING FLOODING OVER THE SOUTHEAST
SECTIONS OF METROPOLITAN CHICAGO...IS DIMINISHING FROM THE WEST AND
SHOULD BECOME OCCASIONAL LIGHT RAIN AOND DRIZZLE SOON AFTER MIDNIGHT.

WINDY AND MUCH COOLER CONDITIONS ARE ON TAP OVERNIGHT WITH WEST WINDS
20 TO 40 MPH BECOMING NORTHWESTERLY AND TEMPERATURES DROPPING INTO
THE 30S.

WILLIAMS

The office that day

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

IssuedProductOfficeCountiesLasted
Nov 27, 7:33 PM CSTFlash Flood WarningLOTCook, Will8 hr

Nearby

Flash Flood Warnings in Illinois, 1990Every flash flood 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.