Alert archive / Illinois / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 36, NWS Quad Cities, IA
NWS Quad Cities, IA issued this severe thunderstorm warning at Aug 29, 1990, 12:11 AM CDT for Mercer County, Illinois. It was in force for 24 min.
The area
The counties it named.
The facts
- Issued
- Aug 29, 1990, 12:11 AM CDT (05:11 UTC)
- Expired
- Aug 29, 1990, 12:35 AM CDT
- In force
- 24 min
- Issued by
- NWS Quad Cities, IA
- Area
- Whole counties
County Mercer 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, 5.2 hours before the alert went out and 423 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
- 15 J/kg
- Mixed-layer CIN
- -193 J/kg
- Mixed-layer LCL
- 1872 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- -45 m²/s²
- 0-3 km storm-relative helicity
- -38 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.2
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KMLI 290511
SVRMLI
ILC131-290545-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOLINE IL
1211 AM CDT WED AUG 29 1990
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 1245 AM CDT FOR PEOPLE IN THE FOLLOWING
COUNTY
IN THE NORTHWEST PART OF ILLINOIS
MERCER
AT 1205 AM CDT RADAR SHOWS A SEVERE THUNDERSTORM IN NORTHWEST
MERCER COUNTY...ABOUT 20 MILES SOUTHWEST OF THE QUAD CITIES.
SHORTLY BEFORE MIDNIGHT...GOLF BALL SIZE HAIL WAS REPORTED IN
SOUTHERN MUSCATINE COUNTY OF IOWA.
THE THUNDERSTORMS WAS MOVING TOWARD THE EAST SOUTHEAST AT 30 MPH.
SOME CITIES/TOWNS IN THE PATH OF THIS STORM INCLUDE... ALEDO...
MATHERVILLE AND VIOLA.
FOR YOUR PROTECTION GO TO A SAFE PLACE IMMEDIATELY. STAY INDOORS
AND AVOID WINDOWS. IF OUTDOORS...DO NOT STAND UNDER A TREE OR IN
OPEN AREAS SUCH AS A FIELD.
A SEVERE THUNDERSTORM CAN PRODUCE DAMAGING WIND OF 60 MPH OR MORE...
LARGE HAIL...FREQUENT DANGEROUS LIGHTNING AND HEAVY RAIN.
IF TIME PERMITS...ASK THE NEAREST LAW ENFORCEMENT AGENCY TO RELAY
YOUR REPORT OF SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE.
ATTN ISP 7 AND 1
KRAEMERWhat 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, 7:47 PM CDT, 4 hours 24 minutes before
ILZ004-IAZ015-290130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MOLINE IL 745 PM CDT TUE AUG 28 1990 ...SEVERE THUNDERSTORM WATCH #691 CANCELLED... THE SEVERE THUNDERSTORM WATCH THAT WAS IN EFFECT FOR NORTHWEST ILLINOIS HAS BEEN CANCELLED. RADAR IS INDICATING STRONG THUNDERSTORMS OVER CENTRAL ILLINOIS MOVING AWAY FROM THE QUAD-CITY AREA. A FEW THUNDERSHOWERS HAVE ALSO DEVELOPED FROM LOUISA COUNTY IN IOWA INTO MERCER COUNTY OF ILLINO;IS. THESE THUNDERSHOWERS WILL BE MOVING SOUTHEAST THROUGH SOUTHERN MERCER AND EXTREME SOUTHWEST HENRY COUNTIES OF ILLINOIS OVER THE NEXT HOUR. NO SEVERE WEATHER IS EXPECTED. COOPER
Special weather statement, Aug 28, 11:30 PM CDT, 41 minutes before
ILZ004-IAZ015-290530- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MOLINE IL 1130 PM CDT TUE AUG 28 1990 AT 1120 PM CDT...RADAR WAS INDICATING A LINE OF STRONG THUNDERSTORMS EXTENDING FROM JUST SOUTHEAST OF IOWA CITY THROUGH MUSCATINE AND INTO ROCK ISLAND AND MOLINE. THESE THUNDERSTORMS WERE MOVING EAST-SOUTHEAST AT 30 MPH AND CONTAIN HEAVY RAIN AND FREQUENT LIGHTNING. THESE STORMS MAY ALSO CONTAIN SMALL HAIL AND GUSTY WINDS. THESE STORMS WILL BE MOVING THROUGH MUSCATINE COUNTY OF IOWA AND ROCK ISLAND AND NORTHERN MERCER COUNTIES OF ILLINOIS OVER THE NEXT 45 MINUTES TO AN HOUR. COOPER
Special weather statement, Aug 28, 11:38 PM CDT, 33 minutes before
ILZ004-IAZ015-290530- SPECIAL WEATHER STATEMENT...CORRECTION TO LAST LINE NATIONAL WEATHER SERVICE MOLINE IL 1130 PM CDT TUE AUG 28 1990 AT 1120 PM CDT...RADAR WAS INDICATING A LINE OF STRONG THUNDERSTORMS EXTENDING FROM JUST SOUTHEAST OF IOWA CITY THROUGH MUSCATINE AND INTO ROCK ISLAND AND MOLINE. THESE THUNDERSTORMS WERE MOVING EAST-SOUTHEAST AT 30 MPH AND CONTAIN HEAVY RAIN AND FREQUENT LIGHTNING. THESE STORMS MAY ALSO CONTAIN SMALL HAIL AND GUSTY WINDS. THESE STORMS WILL BE MOVING THROUGH MUSCATINE COUNTY OF IOWA AND ROCK ISLAND AND NORTHERN MERCER AND WESTERN HENRY COUNTIES OF ILLINOIS OVER THE NEXT HOUR. COOPER
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.