Alert archive / Illinois / Flash Flood Warnings in 2004

Flash Flood Warning 71, NWS Lincoln, IL

August 27, 2004Vermilion County, Illinois

NWS Lincoln, IL issued this flash flood warning at Aug 27, 2004, 10:15 PM CDT for Vermilion 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 27, 2004, 10:15 PM CDT (03:15 UTC)
Expired: Aug 28, 2004, 4:15 AM CDT
In force: 6 hr
Issued by: NWS Lincoln, IL
Area: Counties, with a storm outline in the text

County Vermilion County, IL

The radar

The Lincoln radar (KILX), 138 km from the middle of the area, began a volume at 03:14 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 3.3 hours before the alert went out and 77 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: 3296 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 784 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 94 m²/s²
0-3 km storm-relative helicity: 93 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.5

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KILX 280317
FFWILX
ILC183-280915-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
1015 PM CDT FRI AUG 27 2004

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

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

* UNTIL 415 AM CDT

* AT 1009 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  HEAVY RAINS CONTINUING TO FALL FROM NEAR COLLISON TO JUST NORTH
  OF BISMARK. DOPPLER RAINFALL ESTIMATES OVER THE PAST HOUR RANGE
  FROM 1.5 TO NEARLY 3 INCHES IN THIS AREA. 

* THUNDERSTORMS WITH EXCESSIVE RAINFALL WILL CONTINUE ACROSS
  MAINLY THE NORTHERN HALF OF VERMILION COUNTY. RAINFALL AMOUNTS 
  WILL LIKELY RANGE FROM 2 TO LOCALLY 3 INCHES BY MIDNIGHT. 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.

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 4048 8759 4011 8758 4013 8792 4048 8794

$$
SMITH

2 follow-up statements

000 
WGUS73 KILX 280520
FFSILX
ILC183-280915-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
1215 AM CDT SAT AUG 28 2004

...A FLASH FLOOD WARNING CONTINUES FOR VERMILION COUNTY UNTIL 415 AM
CDT...

AT 1215 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
HEAVY RAINS HAVE SHIFTED NORTH OF THE AREA...HOWEVER...ADDITIONAL
THUNDERSTORMS WITH HEAVY RAINFALL ARE EXPECTED TO DEVELOP ACROSS THE
AREA AGAIN OVER THE NEXT HOUR OR TWO. DOPPLER THREE HOURLY RAINFALL 
ESTIMATES SINCE 900 PM...RANGE FROM 3 TO 4 INCHES IN AN AREA BETWEEN 
ROSSVILLE AND HOOPESTON IN NORTHERN VERMILION COUNTY. 

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 4048 8756 4025 8757 4026 8791 4047 8792

$$
SMITH

000 
WGUS73 KILX 280657
FFSILX
ILC183-280715-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
156 AM CDT SAT AUG 28 2004

...THE FLASH FLOOD WARNING FOR VERMILION COUNTY 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 4049 8757 4007 8755 4006 8793 4047 8788

$$
SMITH

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 27, 9:06 PM CDT	Severe Thunderstorm Warning	ILX	Macon	54 min
Aug 27, 9:43 PM CDT	Severe Thunderstorm Warning	ILX	Piatt	62 min
Aug 28, 5:21 PM CDT	Flash Flood Warning	ILX	Clay, Lawrence, Richland	6 hr
Aug 28, 5:37 PM CDT	Flash Flood Warning	ILX	Crawford, Jasper	6 hr
Aug 28, 6:30 PM CDT	Flash Flood Warning	ILX	Vermilion	6 hr

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; radar from the NEXRAD Level II archive.