Alert archive / Illinois / Flash Flood Warnings in 2002

Flash Flood Warning 29, NWS Lincoln, IL

May 7, 20029 counties in Illinois

NWS Lincoln, IL issued this flash flood warning at May 7, 2002, 2:41 AM CDT for 9 counties in 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: May 7, 2002, 2:41 AM CDT (07:41 UTC)
Expired: May 7, 2002, 9:00 AM CDT
In force: 6 hr
Issued by: NWS Lincoln, IL
Area: Counties, with a storm outline in the text

Counties Cass County, IL, Christian County, IL, Logan County, IL, Macon County, IL, Menard County, IL, Morgan County, IL, Piatt County, IL, Sangamon County, IL, Scott County, IL

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 7.7 hours before the alert went out and 68 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: 854 J/kg
Mixed-layer CIN: -111 J/kg
Mixed-layer LCL: 913 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 72 m²/s²
0-3 km storm-relative helicity: 71 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 2.1

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KILX 070741
FFWSPI
ILC017-021-107-115-129-137-147-167-171-071400-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
218 AM CDT TUE MAY 7 2002

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CHRISTIAN COUNTY IN CENTRAL ILLINOIS
  SANGAMON COUNTY IN CENTRAL ILLINOIS
  MACON COUNTY IN CENTRAL ILLINOIS
  MENARD COUNTY IN CENTRAL ILLINOIS
  PIATT COUNTY IN CENTRAL ILLINOIS
  LOGAN COUNTY IN CENTRAL ILLINOIS
  SCOTT COUNTY IN WEST CENTRAL ILLINOIS
  MORGAN COUNTY IN WEST CENTRAL ILLINOIS
  CASS COUNTY IN WEST CENTRAL ILLINOIS

* UNTIL 900 AM CDT

* AT 210 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  HEAVY RAINS FALLING OVER AREAS ALONG AND NORTH OF INTERSTATE 72 
  IN CENTRAL ILLINOIS. ONE TO THREE INCHES OF RAIN HAS BEEN 
  ESTIMATED SINCE 11 PM.

* THUNDERSTORMS WITH EXCESSIVE RAINFALL WILL CONTINUE ACROSS THE 
  SAME AREA DURING THE EARLY MORNING HOURS. ADDITIONAL RAINFALL 
  AMOUNTS WILL LIKELY RANGE FROM ONE TO THREE INCHES OVER THE NEXT 
  SEVERAL HOURS WITH TOTAL ACCUMULATIONS FROM 4 TO 6 INCHES BY 
  MORNING. 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 4006 8926 4005 8876 4012 8848 3986 8850
          3968 8904 3955 8955 3954 9059 4006 9039

AUTEN

NNNN

The office that day

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

Issued	Product	Office	Counties	Lasted
May 7, 12:12 AM CDT	Severe Thunderstorm Warning	ILX	Sangamon	48 min
May 7, 1:02 AM CDT	Severe Thunderstorm Warning	ILX	Sangamon	43 min
May 7, 1:25 AM CDT	Severe Thunderstorm Warning	ILX	Logan	50 min
May 7, 1:28 AM CDT	Severe Thunderstorm Warning	ILX	Christian	47 min
May 7, 1:36 AM CDT	Severe Thunderstorm Warning	ILX	Cass, Menard	39 min
May 7, 1:49 AM CDT	Severe Thunderstorm Warning	ILX	Macon	41 min
May 7, 3:18 AM CDT	Severe Thunderstorm Warning	ILX	Effingham, Shelby	42 min
May 7, 3:22 AM CDT	Flash Flood Warning	ILX	Champaign, Clark, Coles, Cumberland, Douglas, Edgar and 3 more	7 hr
May 7, 3:40 AM CDT	Severe Thunderstorm Warning	ILX	Coles, Cumberland, Jasper	35 min
May 7, 4:02 AM CDT	Flash Flood Warning	ILX	Crawford, Effingham, Jasper	7 hr

Nearby

Flash Flood Warnings in Illinois, 2002 Every 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.