Alert archive / Illinois / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 33, NWS Quad Cities, IA
NWS Quad Cities, IA issued this severe thunderstorm warning at Jul 9, 1990, 9:58 PM CDT for Mercer County, Illinois. It was in force for 32 min.
The area
The counties it named.
The facts
- Issued
- Jul 9, 1990, 9:58 PM CDT (02:58 UTC)
- Expired
- Jul 9, 1990, 10:30 PM CDT
- In force
- 32 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, 3.0 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1577 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 11 m²/s²
- 0-3 km storm-relative helicity
- 59 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KMLI 100258
SVRMLI
ILC131-100345-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOLINE IL
958 PM CDT MON JUL 9 1990
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 1045 PM CDT FOR PEOPLE IN THE FOLLOWING
COUNTY
IN THE NORTHWEST PART OF ILLINOIS
MERCER
AT 10 50 PM CDT A LINE OF SEVERE THUNDERSTORMS WAS MOVING INTO WEST
MERCER COUNTY OF NORTHWEST ILLINOIS...EXTENDING FROM 20 MILES
SOUTHWEST OF THE QUAD CITIES TO NEAR KEITHSBURG ILLINOIS WHICH IS
30 MILES SOUTHWEST OF THE QUAD CITIES. 60 MPH WINDS HAVE BEEN
REPORTED WITH THESE SEVERE THUNDERSTORMS.
SOME CITIES/TOWNS IN THE PATH OF THIS STORM INCLUDE... ALEDO...
KEITHSBURG...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.
IF TIME PERMITS...ASK THE NEAREST LAW E)NFORCEMENT AGENCY TO RELAY
YOUR REPORT OF SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE.
ATTN ISP 7 AND 1
MEYER 0257ZWhat 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, Jul 9, 7:50 PM CDT, 2 hours 8 minutes before
ILZ004-IAZ015-100130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MOLINE IL 745 PM CDT MON JUL 9 1990 A LINE OF SHOWERS AND THUNDERSTORMS IS DEVELOPING ACROSS SOUTHERN IOWA INTO CENTRAL ILLINOIS THIS EVENING. STORMS EXTEND ACROSS HENRY, LEE, AND DES MOINES COUNTIES OF IOWA, INTO SOUTHERN MERCER, HENDERSON, AND WARREN COUNTIES OF ILLINOIS. THESE THUNDERSTORMS WILL PRODUCE BRIEF PERIODS OF HEAVY RAIN. THEY ARE MOVING TO THE EAST-NORTHEA]ST AT 20 MPH STRONGER STORMS HAVE DEVELOPED IN SOUTHCENTRAL IOWA AND ARE EXPECTED TO MOVE INTO SOUTHEASTERN PORTIONS OF IOWA LATER ON THIS EVENING. COOPER
Special weather statement, Jul 9, 9:03 PM CDT, 55 minutes before
ILZ004-IAZ015-100300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MOLINE IL 900 PM CDT MON JUL 9 1990 ...SEVERE THUNDERSTORM WATCH IN EFFECT TONIGHT AND UNTIL 300 AM CDT TUESDAY MORNING... STRONG THUNDERSTORMS WERE ROLLING ACROSS SOUTHEAST IOWA TONIGHT. AT 900 PM CDT STRONG THUNDERSTORMS WERE 5 MILES SOUTHWEST OF MT. PLEASANT IOWA IN CENTRAL HENRY COUNTY OF SOUTHEAST IOWA. THIS WOULD PLACE THE STRONG THUNDERSTORMS 20 MILES WEST OF BURLINGTON IOWA. OTHER STRONG THUNDERSTORMS WERE SCATTERED ACROSS LEE AND LOUISA COUNTIES OF SOUTHEAST IOWA. ALL THUNDERSTORMS WERE MOVING NORTHEAST AT 30 MILES AN HOUR. AT 845 PM CDT...SALEM IOWA IN SOUTH CENTRAL HENRY COUNTY REPORTED 40 MPH WINDS AND HEAVY RAIN. IF YOU LIVE IN SOUTHEAST IOWA...BE ON THE LOOKOUT FOR RAPIDLY CHANGING WEATHER CONDITIONS. BE PREPARED TO MOVE TO A SAFE LOCATION IN CASE OF THREATENING WEATHER. MEYER
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.