Alert archive / Illinois / Flash Flood Warnings in 2004

Flash Flood Warning 68, NWS Lincoln, IL

August 25, 2004Champaign County, Illinois

NWS Lincoln, IL issued this flash flood warning at Aug 25, 2004, 7:34 PM CDT for Champaign County, Illinois. It was in force for 5 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, 7:34 PM CDT (00:34 UTC)
Expired: Aug 26, 2004, 1:00 AM CDT
In force: 5 hr
Issued by: NWS Lincoln, IL
Area: Counties, with a storm outline in the text

County Champaign County, IL

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 0.6 hours before the alert went out and 254 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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 260038
FFWILX
ILC019-260600-

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

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CHAMPAIGN COUNTY IN EAST CENTRAL ILLINOIS

* UNTIL 100 AM CDT

* AT 731 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN HAS FALLEN FROM MAHOMET TO FOOSLAND. 1 TO 2
  INCHES OF RAIN HAS BEEN ESTIMATED SINCE 630 PM.

* THUNDERSTORMS WITH EXCESSIVE RAINFALL WILL CONTINUE ACROSS
  CHAMPAIGN 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 3991 8843 3992 8798 4037 8796 4038 8843

$$
13

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.

Issued	Product	Office	Counties	Lasted
Aug 25, 7:10 PM CDT	Flash Flood Warning	ILX	Piatt	6 hr
Aug 26, 4:01 AM CDT	Flash Flood Warning	ILX	Clay, Effingham	4 hr
Aug 26, 7:56 AM CDT	Flash Flood Warning	ILX	Effingham, Jasper	3 hr
Aug 26, 5:42 PM CDT	Severe Thunderstorm Warning	ILX	Morgan, Sangamon	63 min
Aug 26, 6:54 PM CDT	Tornado Warning	ILX	Fulton	51 min

Nearby

Flash Flood Warnings in Illinois, 2004 Every 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.