Alert archive / Illinois / Flash Flood Warnings in 2004

Flash Flood Warning 67, NWS Lincoln, IL

August 25, 2004Piatt County, Illinois

NWS Lincoln, IL issued this flash flood warning at Aug 25, 2004, 7:10 PM CDT for Piatt 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
Aug 25, 2004, 7:10 PM CDT (00:10 UTC)
Expired
Aug 26, 2004, 1:00 AM CDT
In force
6 hr
Issued by
NWS Lincoln, IL
Area
Counties, with a storm outline in the text

County Piatt County, IL

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 0.2 hours before the alert went out and 237 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 2004-08-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1111 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, Davenport, at 00:00Z on 2004-08-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 169 square meters per square second.1939587897117Sfc1 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
1111 J/kg
Mixed-layer CIN
-84 J/kg
Mixed-layer LCL
904 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
169 m²/s²
0-3 km storm-relative helicity
282 m²/s²
Significant tornado parameter
0.7
Supercell composite
7.0

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KILX 260011
FFWILX
ILC147-260600-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
710 PM CDT WED AUG 25 2004

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  PIATT COUNTY IN CENTRAL ILLINOIS

* UNTIL 100 AM CDT

* AT 707 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN HAS FALLEN 1 TO 3 INCHES OF RAIN HAS BEEN
  ESTIMATED SINCE 530 PM.

* THUNDERSTORMS WITH EXCESSIVE RAINFALL WILL CONTINUE ACROSS
  PIATT COUNTY. RAINFALL AMOUNTS WILL LIKELY RANGE FROM 2 TO 5
  INCHES BY 1000 PM. THESE RAINFALL AMOUNTS 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.

MOST DEATHS IN FLASH FLOODING OCCUR IN AUTOMOBILES. DO NOT DRIVE YOUR
VEHICLE INTO AREAS IN WHICH WATER COVERS THE ROADWAY. IT ONLY TAKES A
FOOT OR TWO OF WATER TO WASH MOST VEHICLES AWAY. VEHICLES CAUGHT IN
RISING WATERS SHOULD BE ABANDONED QUICKLY.

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 3979 8847 3980 8874 3989 8874 3990 8875
      4009 8875 4009 8869 4010 8868 4016 8868
      4029 8857 4028 8847

$$

EH

NNNN
2 follow-up statements
000 
WGUS73 KILX 260318
FFSILX
ILC019-147-260600-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
1016 PM CDT WED AUG 25 2004

...A FLASH FLOOD WARNING CONTINUES FOR CHAMPAIGN AND PIATT COUNTIES
UNTIL 100 AM CDT...

AT 1016 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THAT THE HEAVY RAINFALL HAS PUSHED EAST OF THE WARNED AREA. 
HOWEVER...THE FLASH FLOOD THREAT WILL CONTINUE INTO THE EARLY 
MORNING HOURS OF THURSDAY DUE TO THE EXCESSIVE RAINFALL AMOUNTS 
RECEIVED EARLIER THIS EVENING.

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 4025 8803 3991 8800 3990 8853 4026 8853

$$
SMITH
000 
WGUS73 KILX 260416
FFSILX
ILC019-147-260430-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
1116 PM CDT WED AUG 25 2004

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR CHAMPAIGN AND 
PIATT COUNTIES UNTIL 100 AM CDT HAS BEEN CANCELLED...

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

LAT...LON 4035 8808 3994 8809 3988 8864 4023 8859

$$
SMITH

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 25, 7:34 PM CDTFlash Flood WarningILXChampaign5 hr
Aug 26, 4:01 AM CDTFlash Flood WarningILXClay, Effingham4 hr
Aug 26, 7:56 AM CDTFlash Flood WarningILXEffingham, Jasper3 hr
Aug 26, 5:42 PM CDTSevere Thunderstorm WarningILXMorgan, Sangamon63 min
Aug 26, 6:54 PM CDTTornado WarningILXFulton51 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.