Alert archive / Illinois / Flash Flood Warnings in 1990

Flash Flood Warning 2, NWS Quad Cities, IA

June 16, 1990Rock Island County, Illinois

NWS Quad Cities, IA issued this flash flood warning at Jun 16, 1990, 7:52 AM CDT for Rock Island County, Illinois. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Jun 16, 1990, 7:52 AM CDT (12:52 UTC)
Expired
Jun 16, 1990, 12:00 PM CDT
In force
4 hr
Issued by
NWS Quad Cities, IA
Area
Whole counties

County 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 12:00Z, 0.9 hours before the alert went out and 391 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, Green Bay/Straub, WI at 12:00Z on 1990-06-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Green Bay/Straub, WI at 12:00Z on 1990-06-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 158 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1259 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
158 m²/s²
0-3 km storm-relative helicity
170 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 161252
FFWMLI
IAC163-045-031-139-ILC161-161700-

BULLETIN - IMMEDIATE BROADCAST REQUESTED/EBS ACTIVATION REQUESTED 
FLASH FLOOD WARNING 
NATIONAL WEATHER SERVICE MOLINE IL
752 AM CDT SAT JUN 16 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A FLASH FLOOD WARNING 
EFFECTIVE UNTIL 1200 PM CDT FOR PEOPLE IN THE FOLLOWING 
COUNTIES

   IN THE EXTREME EAST PART OF IOWA
      SCOTT...CLINTON...CEDAR...MUSCATINE...

   IN THE NORTHWEST PART OF ILLINOIS
      ROCK-ISLAND...

STRONG THUNDERSTORMS WITH HEAVY RAINFALL WAS OCCURRING OVER
EAST CENTRAL IA AND PARTS OF EXTREME NORTHWEST ILLINOIS.

LOWDEN IA IN NORTHEAST CEDAR COUNTY IA REPORTED 3 INCHES OF
RAIN BETWEEN 5 AND 7 AM CDT WHILE IN MUSCATINE COUNTY 21/2
INCHES OF RAIN FELL IN 30 MINUTE SPAN AROUND 7 30 THIS MORNING.

THE THUNDERSTORMS WERE MOVING TOWARD THE EAST AT 30 MPH.

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

KRAEMER

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 16, 8:48 AM CDTFlash Flood WarningDVNWhiteside3 hr
Jun 16, 11:52 AM CDTFlash Flood WarningDVNRock Island, Whiteside4 hr
Jun 16, 4:03 PM CDTFlash Flood WarningDVNRock Island3 hr
Jun 16, 4:03 PM CDTFlash Flood WarningDVNWhiteside3 hr
Jun 16, 4:18 PM CDTTornado WarningDVNMercer27 min
Jun 16, 5:07 PM CDTSevere Thunderstorm WarningDVNHenry, Whiteside38 min

Nearby

Flash 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.