Alert archive / Iowa / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 34, NWS Quad Cities, IA
NWS Quad Cities, IA issued this severe thunderstorm warning at Aug 19, 1990, 5:01 PM CDT for Clinton County, Iowa. It was in force for 44 min. 1 report 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 19, 1990, 5:01 PM CDT (22:01 UTC)
- Expired
- Aug 19, 1990, 5:45 PM CDT
- In force
- 44 min
- Issued by
- NWS Quad Cities, IA
- Area
- Whole counties
County Clinton County, IA
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 19, 5:20 PM CDT | Thunderstorm Wind 50 | Clinton, IA |
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, 10.0 hours before the alert went out and 348 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
- 1 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 531 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 126 m²/s²
- 0-3 km storm-relative helicity
- 159 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 192201
SVRMLI
IAC045-192245-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOLINE IL
501 PM CDT SUN AUG 19 1990
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 545 PM CDT FOR PEOPLE IN THE FOLLOWING
COUNTY
IN THE EXTREME EAST PART OF IOWA
CLINTON
AT 450 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM IN WESTERN
CLINTON COUNTY IN EAST CENTRAL IOWA...NEAR WHEATLAND OR 35 MILES
NORTHWEST OF MOLINE.
THE THUNDERSTORM IS MOVING EAST AT 25 MPH.
SOME CITIES/TOWNS IN THE PATH OF THIS STORM INCLUDE... WELTON...
CHARLOTTE...CLINTON, IOWA.
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.
THESE SLOW MOVING THUNDERSTORMS MAY CAUSE FLOODING OF SMALL
STREAMS AND UNDERPASSES. DO NOT DRIVE THROUGH FLOODED AREAS.
IF TIME PERMITS...ASK THE NEAREST LAW ENFORCEMENT AGENCY TO RELAY
YOUR REPORT OF SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE.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 19, 1:27 PM CDT, 3 hours 34 minutes before
ILZ004-IAZ015-191500- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MOLINE IL 855 AM CDT SUN AUG 19 1990 RADAR WAS SHOWING AN AREA OF SHOWERS AND THUNDERSTORMS MOVING FROM SOUTHCENTRAL IOWA INTO EAST-CENTRAL PORTIONS OF THE STATE. AT 845 AM CDT THE EASTERN EDGE OF THE RAIN EXTENDED FROM JUST WEST OF CEDAR RAPIDS AND IOWA CITY SOUTH TO MT. PLEASANT IN HENRY COUNTY OF IOWA. THE AREA WAS MOVING TO THE NORTHEAST AT 30 MPH AND MAY BRING BRIEF PERIODS OF HEAVY RAIN AND GUSTY WINDS AS IT MOVES THROUGH HENRY... DES MOINES...LOUISA...MUSCATINE...AND CEDAR COUNTIES OF IOWA OVER THE NEXT HOUR TO TWO HOURS. COOPER
Nearby
Severe Thunderstorm Warnings in Iowa, 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.