Alert archive / Iowa / Flash Flood Warnings in 1990

Flash Flood Warning 13, NWS Quad Cities, IA

June 19, 1990Louisa County, Muscatine County, Iowa

NWS Quad Cities, IA issued this flash flood warning at Jun 19, 1990, 10:35 PM CDT for Louisa County, Muscatine County, Iowa. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued: Jun 19, 1990, 10:35 PM CDT (03:35 UTC)
Expired: Jun 20, 1990, 1:00 AM CDT
In force: 2 hr
Issued by: NWS Quad Cities, IA
Area: Whole counties

Counties Louisa County, IA, Muscatine County, IA

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, 3.6 hours before the alert went out and 429 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2451 m above ground
0-6 km bulk shear: 64 kt
0-1 km storm-relative helicity: 105 m²/s²
0-3 km storm-relative helicity: 214 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KMLI 200335
FFWMLI
IAC139-115-087-ILC161-131-073-200600-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
FLASH FLOOD WARNING 
NATIONAL WEATHER SERVICE MOLINE IL
1035 PM CDT TUE JUN 19 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING 
EFFECTIVE UNTIL 100 AM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES

   IN THE EXTREME EAST PART OF IOWA
      SOUTHERN MUSCATINE...LOUISA...

   IN THE SOUTHEAST PART OF IOWA
      HENRY...

   IN THE NORTHWEST PART OF ILLINOIS
      SOUTHERN ROCK-ISLAND...MERCER...HENRY...

AT 1030 PM CDT HEAVY RAIN CONTINUED TO FALL ACROSS THE BISTATE
REGION.  SMALL STREAMS IN MERCER COUNTY WERE REPORTED AT BANKFULL
BEGINNING TO OVERFLOW.  AN EAST TO WEST LINE OF THUNDERSTORMS WITH
HEAVY RAIN WAS LOCATED OVER SOUTHEAST IOWA AND WEST ILLINOIS.
ALL THUNDERSTORMS AND SHOWERS WERE MOVING EAST AT 30 MILES AN
HOUR...REPEATING TO COVER TO SAME RAIN SOAKED AREA ONCE AGAIN.

MOVE TO HIGH GROUND IF YOU LIVE NEAR ANY CREEKS...STREAMS...RIVERS
OR STREETS THAT ARE PRONE TO FLOODING.

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..4.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

MEYER 0334Z

The office that day

Everything else NWS Quad Cities, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 19, 10:35 PM CDT	Flash Flood Warning	DVN	Henry	2 hr
Jun 19, 11:06 PM CDT	Flash Flood Warning	DVN	Des Moines, Henry	69 min
Jun 19, 11:06 PM CDT	Severe Thunderstorm Warning	DVN	Des Moines, Henry	69 min

Nearby

Flash Flood Warnings in Iowa, 1990 Every 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.