Alert archive / Illinois / Flash Flood Warnings in 2002

Flash Flood Warning 91, NWS Lincoln, IL

August 19, 2002Champaign County, Vermilion County, Illinois

NWS Lincoln, IL issued this flash flood warning at Aug 19, 2002, 5:32 AM CDT for Champaign County, 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 19, 2002, 5:32 AM CDT (10:32 UTC)
Expired
Aug 19, 2002, 11:30 AM CDT
In force
6 hr
Issued by
NWS Lincoln, IL
Area
Counties, with a storm outline in the text

Counties Champaign County, IL, Vermilion County, IL

The radar

The Lincoln radar (KILX), 121 km from the middle of the area, began a volume at 10:32 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, 10.5 hours before the alert went out and 59 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, Lincoln, IL at 00:00Z on 2002-08-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 523 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 00:00Z on 2002-08-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 172 square meters per square second.193958Sfc1 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
523 J/kg
Mixed-layer CIN
-272 J/kg
Mixed-layer LCL
743 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
172 m²/s²
0-3 km storm-relative helicity
282 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.1

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KILX 191032
FFWSPI
ILC019-183-191630-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
525 AM CDT MON AUG 19 2002

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

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

* UNTIL 1130 AM CDT

* AT 525 AM CDT...THUNDERSTORMS WITH EXCESSIVE RAINFALL CONTINUE 
  ACROSS PARTS OF CHAMPAIGN AND VERMILION COUNTIES. THIS WARNING 
  REPLACES THE PREVIOUS WARNINGS THAT WERE ISSUED FOR NORTHERN 
  VERMILION AND CHAMPAIGN COUNTIES EARLIER THIS MORNING. AREAS
  FROM RANKIN TO JUST SOUTH OF HOOPESTON HAVE RECEIVED IN EXCESS
  OF 6 INCHES OF RAIN SINCE LATE LAST NIGHT WITH DOPPLER RAINFALL
  ESTIMATES CLOSING IN ON TEN INCHES. VERMILION COUNTY ESDA REPORTED
  THAT EVACUATIONS WERE UNDERWAY IN THE TOWN OF HOOPESTON. 

  FURTHER EAST AND SOUTH IN CHAMPAIGN COUNTY...RAINFALL ESTIMATES RANGE 
  FROM 2 TO 3 INCHES ACROSS THE NORTHERN PORTION OF THE COUNTY. THE BAND 
  OF HEAVY RAINFALL WILL CONTINUE TO SLIP SOUTH ACROSS BOTH VERMILION AND 
  CHAMPAIGN COUNTIES OVER THE NEXT HOUR OR TWO WITH RAINFALL RATES OF FROM
  1 TO 2 INCHES PER HOUR POSSIBLE.

THIS IS AN EXTREMELY DANGEROUS SITUATION IN THESE COUNTIES. 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 4042 8760 3993 8758 3994 8840 4038 8840


SMITH
NNNN

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 19, 12:20 AM CDTSevere Thunderstorm WarningILXMcLean40 min
Aug 19, 1:03 AM CDTSevere Thunderstorm WarningILXMcLean27 min
Aug 19, 2:03 AM CDTSevere Thunderstorm WarningILXVermilion42 min
Aug 19, 2:34 AM CDTFlash Flood WarningILXVermilion6 hr
Aug 19, 4:13 AM CDTSevere Thunderstorm WarningILXMason47 min
Aug 19, 4:36 AM CDTFlash Flood WarningILXChampaign6 hr
Aug 19, 5:32 AM CDTSevere Thunderstorm WarningILXSangamon58 min

Nearby

Flash Flood Warnings in Illinois, 2002Every 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; radar from the NEXRAD Level II archive.