Alert archive / Iowa / Flash Flood Warnings in 1986

Flash Flood Warning 2, NWS Quad Cities, IA

June 4, 1986Des Moines County, Louisa County, Iowa

NWS Quad Cities, IA issued this flash flood warning at Jun 4, 1986, 3:36 PM CDT for Des Moines County, Louisa County, Iowa. It was in force for 114 min.

The area

The counties it named.

The facts

Issued
Jun 4, 1986, 3:36 PM CDT (20:36 UTC)
Expired
Jun 4, 1986, 5:30 PM CDT
In force
114 min
Issued by
NWS Quad Cities, IA
Area
Whole counties

Counties Des Moines 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.

The nearest sounding before it

Peoria Regional, IL (KPIA), launched 12:00Z, 8.6 hours before the alert went out and 143 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-pSkew-T log-p diagram, Peoria Regional, IL at 12:00Z on 1986-06-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 869 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Peoria Regional, IL at 12:00Z on 1986-06-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 61 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
869 J/kg
Mixed-layer CIN
-26 J/kg
Mixed-layer LCL
661 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
61 m²/s²
0-3 km storm-relative helicity
63 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 042039 COR
FFWMLI
ILC187-131-073-071-IAC115-057-042145-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MOLINE IL
336 PM CDT WED JUN 4 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING
EFFECTIVE UNTIL 730 PM CDT FOR PEOPLE IN THE FOLLOWING COUNTIES OF

NORTHWEST ILLINOIS...NORTHERN WARREN...SOUTHERN MERCER...SOUTHERN
 HENRY AND NORTHERN HENDERSON
SOUTHEAST IOWA...SOUTHEAST LOUISA AND EASTERN DES-MOINES

AT 3-20 PM CDT RADIO STATION KBUR IN BURLINGTON IOWA REPORTED
3.90 INCHES OF RAIN BETWEEN 2-05 AND 305 PM CDT.

 FLASH FLOOD WARNING MEANS FLASH FLOODING IS OCCURRING OR IS
 IMMINENT IN THE SPECIFIED AREA.

 DO NOT TRY TO DRIVE THROUGH FLOODED AREAS.

 PERSONS ALONG OR NEAR STREAMS SUBJECT TO FLASH FLOODING SHOULD
 BE PREPARED TO MOVE TO A PLACE OF SAFETY IMMEDIATELY.

WIGGINS

Nearby

Flash Flood Warnings in Iowa, 1986Every flash flood warning in 1986

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.