Alert archive / Iowa / Flash Flood Warnings in 1990
Flash Flood Warning 16, NWS Quad Cities, IA
NWS Quad Cities, IA issued this flash flood warning at Jun 29, 1990, 4:23 AM CDT for Scott County, Iowa; Rock Island County, Illinois. It was in force for 4 hr.
The area
The counties it named.
The facts
- Issued
- Jun 29, 1990, 4:23 AM CDT (09:23 UTC)
- Expired
- Jun 29, 1990, 8:00 AM CDT
- In force
- 4 hr
- Issued by
- NWS Quad Cities, IA
- Area
- Whole counties
Counties Scott County, IA, Rock Island 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, 9.4 hours before the alert went out and 384 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
- 840 J/kg
- Mixed-layer CIN
- -46 J/kg
- Mixed-layer LCL
- 630 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 152 m²/s²
- 0-3 km storm-relative helicity
- 245 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 5.1
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KMLI 290928 COR
FFWMLI
IAC163-ILC161-073-291700-
BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING...CORRECTION FOR TIME
NATIONAL WEATHER SERVICE MOLINE IL
423 AM CDT FRI JUN 29 1990
THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING
EFFECTIVE UNTIL 800 AM CDT FOR PEOPLE IN THE FOLLOWING
COUNTIES
IN THE EXTREME EAST PART OF IOWA
SCOTT...
IN THE NORTHWEST PART OF ILLINOIS
ROCK-ISLAND...HENRY...
AT 4AM...A NARROW LINE OF STRONG THUNDERSTORMS WITH HEAVY RAIN
EXTENDED FROM EAST CENTRAL IOWA INTO NORTHWEST ILLINOIS.
THUNDERSTORMS WERE LOCATED FROM SOUTHEAST CEDAR ACROSS SOUTH
SCOTT IN EAST CENTRAL IOWA INTO UPPER ROCK ISLAND AND NORTH HENRY
COUNTIES IN NORTHWEST ILLINOIS.
ESTIMATED RAINFALL OF UP TO 3 AND A HALF INCHES HAS OCCURRED SO
FAR AND ADDITIONAL THUNDERSTORMS WILL MOVE OVER THE SAME GENERAL
AREA.
FLASH FLOOD WARNING MEANS FLASH FLOODING IS OCCURRING OR IS
IMMINENT IN THE SPECIFIED AREA.
PERSONS ALONG OR NEAR STREAMS SUBJECT TO FLASH FLOODING OR SHARP
RISES SHOULD BE PREPARED TO MOVE TO A PLACE OF SAFETY IMMEDIATELY.
MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO
CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS THE ROADWAY.
NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT.
IF TIME PERMITS...ASK THE NEAREST LAW ENFORECMENT AGENCY TO RELAY
YOUR REPORT OF FLOODING TO THE NATIONAL WEATHER SERVICE.
ATTN ISP 7 AND 1
COOPER/FOBERTThe office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 29, 8:03 AM CDT | Flash Flood Warning | DVN | Clinton, Scott | 3 hr |
| Jun 29, 11:02 AM CDT | Flash Flood Warning | DVN | Clinton | 3 hr |
| Jun 29, 11:02 AM CDT | Flash Flood Warning | DVN | Scott | 3 hr |
| Jun 29, 1:31 AM CDT | Severe Thunderstorm Warning | DVN | Jo Daviess, Stephenson | 59 min |
| Jun 29, 3:04 AM CDT | Severe Thunderstorm Warning | DVN | Henry | 41 min |
| Jun 29, 3:30 AM CDT | Severe Thunderstorm Warning | DVN | Henry, Rock Island | 30 min |
| Jun 29, 4:23 AM CDT | Flash Flood Warning | DVN | Henry | 4 hr |
| Jun 29, 8:03 AM CDT | Flash Flood Warning | DVN | Henry, Rock Island, Whiteside | 3 hr |
Nearby
Flash Flood Warnings in Iowa, 1990Flash 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.