Alert archive / Iowa / Severe Thunderstorm Warnings in 1990
Severe Thunderstorm Warning 32, NWS Quad Cities, IA
NWS Quad Cities, IA issued this severe thunderstorm warning at Jul 9, 1990, 9:22 PM CDT for Des Moines County, Henry County, Louisa County, Iowa. It was in force for 53 min. 2 reports 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
- Jul 9, 1990, 9:22 PM CDT (02:22 UTC)
- Expired
- Jul 9, 1990, 10:15 PM CDT
- In force
- 53 min
- Issued by
- NWS Quad Cities, IA
- Area
- Whole counties
Counties Des Moines County, IA, Henry County, IA, Louisa 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 |
|---|---|---|---|
| Jul 9, 9:38 PM CDT | Thunderstorm Wind 50 | Henry, IA | |
| Jul 9, 10:13 PM CDT | Thunderstorm Wind 52 | Louisa, 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
Omaha, NE (KOAX), launched 00:00Z, 2.4 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
- 3634 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 114 m²/s²
- 0-3 km storm-relative helicity
- 246 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 100222
SVRMLI
IAC115-087-057-100315-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOLINE IL
922 PM CDT MON JUL 9 1990
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 1015 PM CDT FOR PEOPLE IN THE FOLLOWING
COUNTIES
IN THE EXTREME EAST PART OF IOWA
LOUISA...
IN THE SOUTHEAST PART OF IOWA
HENRY...DES-MOINES...
AT 910 PM CDT, A LINE OF SEVERE THUNDERSTORMS WAS MOVING ACROSS
CENTRAL HENRY COUNTY OF SOUTHEAST IOWA.
AT 900 PM CDT TREES WERE BLOWN DOWN IN MOUNT PLEASANT IOWA...ABOUT
60 MILES SOUTHWEST OF THE QUAD-CITIES.
THESE SEVERE THUNDERSTORMS WILL REACH WAYLAND AND WINFIELD IOWA BY
920 PM CDT.
SOME CITIES/TOWNS IN THE PATH OF THIS STORM INCLUDE...
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.
COOPER/MEYER 0221What 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, 1 hour 32 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, 19 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 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.