Alert archive / Illinois / Flash Flood Warnings in 2002

Flash Flood Warning 7, NWS Lincoln, IL

April 19, 2002Sangamon County, Illinois

NWS Lincoln, IL issued this flash flood warning at Apr 19, 2002, 8:49 PM CDT for Sangamon 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: Apr 19, 2002, 8:49 PM CDT (01:49 UTC)
Expired: Apr 20, 2002, 2:00 AM CDT
In force: 5 hr
Issued by: NWS Lincoln, IL
Area: Counties, with a storm outline in the text

County Sangamon County, IL

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 1.8 hours before the alert went out and 92 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: 49 J/kg
Mixed-layer CIN: -173 J/kg
Mixed-layer LCL: 1566 m above ground
0-6 km bulk shear: 70 kt
0-1 km storm-relative helicity: 127 m²/s²
0-3 km storm-relative helicity: 186 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KILX 200149 CCA
FFWSPI
ILC167-200700-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING...CORRECTED
NATIONAL WEATHER SERVICE LINCOLN IL
845 PM CDT FRI APR 19 2002

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

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

* UNTIL 200 AM CDT

* AT 835 PM CDT...FLASH FLOODING WAS REPORTED AT MILE MARKER 100 ON
  INTERSTATE 55. NATIONAL WEATHER SERVICE DOPPLER RADAR ESTIMATED THAT
  4 INCHES OF RAIN HAD FALLEN OVER THE AREA SINCE 8 PM.

* THUNDERSTORMS WITH EXCESSIVE RAINFALL RATES OF 2 TO 3
  INCHES PER HOUR WILL CONTINUE ACROSS SPRINGFIELD THROUGH
  930 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 3992 8931 3975 8942 3957 8991 3990 8999

BARKER

NNNN

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 19, 7:03 PM CDT	Severe Thunderstorm Warning	ILX	Champaign, Douglas	42 min
Apr 19, 7:19 PM CDT	Tornado Warning	ILX	Champaign	56 min
Apr 19, 7:25 PM CDT	Severe Thunderstorm Warning	ILX	Cass	50 min
Apr 19, 7:25 PM CDT	Severe Thunderstorm Warning	ILX	Macon	65 min
Apr 19, 7:29 PM CDT	Severe Thunderstorm Warning	ILX	Piatt	46 min
Apr 19, 7:54 PM CDT	Severe Thunderstorm Warning	ILX	Menard, Sangamon	66 min
Apr 19, 7:55 PM CDT	Flash Flood Warning	ILX	Champaign, Douglas	6 hr
Apr 19, 8:05 PM CDT	Severe Thunderstorm Warning	ILX	Champaign, Douglas	55 min
Apr 19, 8:37 PM CDT	Flash Flood Warning	ILX	Vermilion	5 hr
Apr 19, 8:43 PM CDT	Severe Thunderstorm Warning	ILX	Christian	62 min
Apr 19, 8:45 PM CDT	Flash Flood Warning	ILX	Piatt	5 hr
Apr 19, 8:46 PM CDT	Flash Flood Warning	ILX	Piatt, Sangamon	5 hr
Apr 19, 8:47 PM CDT	Flash Flood Warning	ILX	Piatt	5 hr
Apr 19, 8:53 PM CDT	Severe Thunderstorm Warning	ILX	Logan, Macon, Sangamon	52 min
Apr 19, 9:00 PM CDT	Flash Flood Warning	ILX	Christian, Macon	5 hr
Apr 19, 9:31 PM CDT	Flash Flood Warning	ILX	DeWitt, Logan	4 hr
Apr 20, 2:09 AM CDT	Flash Flood Warning	ILX	Champaign, Douglas	6 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.