Alert archive / Illinois / Flash Flood Warnings in 2004

Flash Flood Warning 50, NWS Lincoln, IL

July 11, 2004Clay County, Illinois

NWS Lincoln, IL issued this flash flood warning at Jul 11, 2004, 8:35 PM CDT for Clay County, Illinois. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 11, 2004, 8:35 PM CDT (01:35 UTC)
Expired
Jul 12, 2004, 2:30 AM CDT
In force
6 hr
Issued by
NWS Lincoln, IL
Area
Counties, with a storm outline in the text

County Clay County, IL

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 1.6 hours before the alert went out and 162 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, Lincoln, IL at 00:00Z on 2004-07-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 168 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, Lincoln, IL at 00:00Z on 2004-07-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 6 square meters per square second.193958Sfc1 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
168 J/kg
Mixed-layer CIN
-214 J/kg
Mixed-layer LCL
1322 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
6 m²/s²
0-3 km storm-relative helicity
17 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.1

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KILX 120137
FFWILX
ILC025-120730-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
835 PM CDT SUN JUL 11 2004

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CLAY COUNTY IN SOUTH CENTRAL ILLINOIS

* UNTIL 230 AM CDT

* AT 828 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN HAS FALLEN ACROSS SOUTHERN CLAY COUNTY...
  PARTICULARLY IN THE ELM CREEK AND BUCK CREEK BASINS. THREE TO FOUR
  INCHES OF RAIN HAS BEEN ESTIMATED SINCE 630 PM.

* THUNDERSTORMS WITH EXCESSIVE RAINFALL RATES OF TWO TO THREE
  INCHES PER HOUR WILL CONTINUE ACROSS SOUTHERN CLAY COUNTY THROUGH
  10 PM. THESE RAINFALL RATES WILL LIKELY PRODUCE FLASH FLOODING.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF IN A FLOOD PRONE AREA...MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG CREEKS AND STREAMS ARE ESPECIALLY VULNERABLE
TO THE EFFECTS OF FLASH FLOODING. DO NOT ATTEMPT TO CROSS FLOODED
AREAS BY FOOT OR AUTOMOBILE.

REPORT FLASH FLOODING TO YOUR LOCAL ESDA...OR THE NEAREST LAW
ENFORCEMENT AGENCY...FOR RELAY TO THE NATIONAL WEATHER SERVICE. STAY
TUNED FOR LATER STATEMENTS.

LAT...LON 3875 8827 3862 8829 3862 8869 3876 8869

$$

BARKER
2 follow-up statements
000 
WGUS73 KILX 120449
FFSILX
ILC025-120730-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
1146 PM CDT SUN JUL 11 2004

...A FLASH FLOOD WARNING CONTINUES FOR CLAY COUNTY UNTIL 230 AM
CDT...

ALTHOUGH HEAVY RAINS OVER CLAY COUNTY HAVE TAPERED OFF...A FEW LIGHT 
SHOWERS WILL CONTINUE INTO THE EARLY MORNING HOURS. ADDITIONAL 
RAINFALL AMOUNTS WILL BE LIGHT...HOWEVER RUNOFF FROM THE PREVIOUS 
RAIN WILL CAUSE LOCALIZED FLOODING TO PERSIST.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLASH FLOODS. IT IS VERY DIFFICULT AT NIGHT TO JUDGE HOW
MUCH WATER COVERS ROADWAYS. DO NOT ATTEMPT TO CROSS FLOODED ROADWAYS.

REPORT FLASH FLOODING TO YOUR LOCAL ESDA...OR THE NEAREST LAW
ENFORCEMENT AGENCY...FOR RELAY TO THE NATIONAL WEATHER SERVICE. STAY
TUNED FOR LATER STATEMENTS.

LAT...LON 3884 8832 3865 8830 3863 8868 3889 8868

$$

CHURCHILL
000 
WGUS73 KILX 120731
FFSILX
ILC025-120745-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
230 AM CDT MON JUL 12 2004

...THE FLASH FLOOD WARNING FOR CLAY COUNTY IS BEING ALLOWED TO
EXPIRE...

THE HEAVY RAINFALL AND FLOOD THREAT HAS ENDED ACROSS THE WARNED AREA.
THEREFORE...THE FLASH FLOOD WARNING HAS BEEN ALLOWED TO EXPIRE.

LAT...LON 3890 8839 3889 8867 3864 8868 3864 8829

$$
SMITH

The office that day

Everything else NWS Lincoln, IL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 11, 7:12 PM CDTSevere Thunderstorm WarningILXLawrence48 min

Nearby

Flash Flood Warnings in Illinois, 2004Every flash flood warning in 2004

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.