Alert archive / Illinois / Flash Flood Warnings in 2002

Flash Flood Warning 5, NWS Quad Cities, IA

May 12, 20024 counties in Illinois; Clark County, Scotland County, Missouri; Lee County, Iowa

NWS Quad Cities, IA issued this flash flood warning at May 12, 2002, 2:16 AM CDT for 4 counties in Illinois; Clark County, Scotland County, Missouri; Lee County, Iowa. It was in force for 8 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
May 12, 2002, 2:16 AM CDT (07:16 UTC)
Expired
May 12, 2002, 10:00 AM CDT
In force
8 hr
Issued by
NWS Quad Cities, IA
Area
Whole counties

Counties Lee County, IA, Hancock County, IL, Henderson County, IL, McDonough County, IL, Warren County, IL, Clark County, MO, Scotland County, MO

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 7.3 hours before the alert went out and 132 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, Davenport, at 00:00Z on 2002-05-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 joules per kilogram.LCLEL10008507005003002001001 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, Davenport, at 00:00Z on 2002-05-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 556 square meters per square second.1939587897Sfc1 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
1 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
424 m above ground
0-6 km bulk shear
80 kt
0-1 km storm-relative helicity
556 m²/s²
0-3 km storm-relative helicity
666 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.6

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KDVN 120716
FFWMLI
IAC111-ILC067-071-109-187-MOC045-199-121500-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
205 AM CDT SUN MAY 12 2002

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS EXTENDED THE 

* FLASH FLOOD WARNING FOR...
  CLARK COUNTY IN NORTHEAST MISSOURI
  SCOTLAND COUNTY IN NORTHEAST MISSOURI
  LEE COUNTY IN SOUTHEAST IOWA
  HENDERSON COUNTY IN WEST CENTRAL ILLINOIS
  WARREN COUNTY IN WEST CENTRAL ILLINOIS
  HANCOCK COUNTY IN WEST CENTRAL ILLINOIS
  MCDONOUGH COUNTY IN WEST CENTRAL ILLINOIS

* UNTIL 1000 AM CDT

* AT 205 AM CDT...LOCAL LAW ENFORCEMENT REPORTED WIDESPREAD FLASH 
FLOODING IN THE WARNED COUNTIES.  MANY SECONDARY ROADS HAVE BEEN 
REPORTED TO BE WATER COVERED AND MANY WERE CLOSED.  SOME COMMUNITIES 
HAD ALSO REPORTED WATER IN BASEMENTS.  

* THE GROUND HAS ALREADY BEEN SATURATED BY RECENT RAINFALL...  
ADDITIONAL HEAVY RAIN HAS RESULTED IN EXCESSIVE RUNOFF...LEADING   
THE LIKELIHOOD OF FLASH FLOODING IN THE WARNED AREA.

EXCESSIVE RUNOFF FROM CONTINUED HEAVY RAIN WILL ONLY CAUSE 
ADDITIONAL FLASH FLOODING OF SMALL CREEKS AND STREAMS...COUNTRY 
ROADS...AS WELL AS FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS.

THIS IS A SERIOUS SITUATION.  MANY FLASH FLOOD FATALITIES OCCUR IN 
AUTOMOBILES.  DO NOT DRIVE YOUR VEHICLE INTO WATER COVERED ROADWAYS. 
THE WATER MAY BE TOO DEEP TO CROSS SAFELY OR THE ROAD COULD BE 
WASHED OUT. ONE VEHICLE RESCUE HAS ALREADY TAKEN PLACE OVERNIGHT IN 
SOUTHEAST MCDONOUGH COUNTY ILLINOIS.  TRAVEL IN THE WARNING 
AREA...ESPECIALLY IN RURAL AREAS...IS NOT RECOMMENDED THIS MORNING.  
IF YOU DO TRAVEL...AND ENCOUNTER WATER COVERED ROADWAYS...TURN 
AROUND. 

$$ 

MEYER

The office that day

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

IssuedProductOfficeCountiesLasted
May 11, 10:24 PM CDTFlash Flood WarningDVNHancock5 hr
May 11, 11:09 PM CDTFlash Flood WarningDVNHenderson, Warren4 hr
May 11, 11:44 PM CDTFlash Flood WarningDVNMcDonough6 hr
May 11, 8:14 PM CDTSevere Thunderstorm WarningDVNScotland46 min
May 11, 9:22 PM CDTFlash Flood WarningDVNClark, Scotland5 hr

Nearby

Flash Flood Warnings in Illinois, 2002Flash Flood Warnings in Missouri, 2002Flash Flood Warnings in Iowa, 2002Every flash flood warning in 2002

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.