Flash Flood Warning 7, NWS Chicago, IL

Issued

Aug 19, 2002, 2:12 AM CDT (07:12 UTC)

Expired

Aug 19, 2002, 6:00 AM CDT

In force

4 hr

Issued by

NWS Chicago, IL

Area

Counties, with a storm outline in the text

Counties Ford County, IL, Iroquois County, IL

The Lincoln radar (KILX), 113 km from the middle of the area, began a volume at 07:15 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.

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this flash flood warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

000 
WGUS53 KLOT 190712
FFWCHI
ILC053-075-191100-

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

THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  FORD COUNTY IN EAST CENTRAL ILLINOIS
  IROQUOIS COUNTY IN EAST CENTRAL ILLINOIS

* UNTIL 600 AM CDT

* AT 206 AM CDT...WEATHER SERVICE RADAR INDICATED THAT THUNDERSTORMS 
WERE PRODUCING VERY HEAVY RAIN ACROSS SOUTHERN FORD COUNTY INTO 
SOUTHWESTERN IROQUOIS COUNTY.  RADAR ESTIMATED THAT 2 TO 3 INCHES 
HAD FALLEN BETWEEN 1 AND 2 AM OVER MUCH OF THIS AREA. 

* SOME LOCATIONS AFFECTED INCLUDE...
  BUCKLEY...
  CISSNA PARK...
  ELLIOTT...
  GIBSON...
  LODA...
  PAXTON...

ADDITIONAL THUNDERSTORMS WITH HEAVY RAIN ARE EXPECTED OVERNIGHT INTO 
MONDAY MORNING.
 
BE ESPECIALLY CAUTIOUS AT NIGHT...AND WATCH FOR FLOODED ROADS.

IF YOU ENCOUNTER A FLOODED ROAD...TURN AROUND AND FIND AN ALTERNATE
ROUTE. A CAR OR SMALL TRUCK CAN BE SWEPT OFF A ROAD AND INTO A STREAM
BY AS LITTLE AS TWO FEET OF WATER.

LAT...LON 4063 8786 4041 8786 4040 8846 4062 8847

NNNN

NWS Chicago, IL wrote its last area forecast discussion before this flash flood warning went out at Aug 19, 2:05 AM CDT, 7 minutes earlier.

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHICAGO IL
205 AM CDT MON AUG 19 2002

ANALYSIS SHOWING INVERTED TROF EXTENDING FROM THE SRN PLAINS NEWD
THRU NERN MO TO CHI AREA. SEVERAL AREAS OF HEAVY RAIN ASSOC WITH
THIS SYSTEM. THIS FIRST NOW MOVING EWD ACROSS THE SRN PTN OF CWFA
WHICH MODELS ACCOUNT FOR. ANOTHER AREA IN WI WHICH AVN CATCHES BUT
NOT ETA. ANOTHER AREA IN SRN IA NOW CROSSING THE MS RVR AT DVN WHICH
IS ACCOUNTED FOR VIA RH ON MODELS BUT NOT QPF-WISE AS A BAND OF HVY
RAIN. THIS LAST AREA IF CONT EWD WILL BRING MUCH NEEDED RELIEF TO
MOST PARCHED AREA OF NERN IL.

MODELS NOT IN GOOD AGREEMENT WITH THIS SYSTEM OR THE NEXT. S/W
EMBEDDED IN MID LVL TROF SWEEPS THRU THUS AM AND CLEARS PCPN OUT OF
CWFA TO THE SOUTH IN THE AFTN...AT LEAST SO SAYS THE AVN AND NGM.
ETA RELUCTANT TO PUSH INVERTED TROF SWD AND MAINTAINS PCPN TNGT IN
SRN PTN OF CWFA UNDERNEATH BLDG 850 RIDGE. AM SKEPTICALLY LAYING
ASIDE ETA WITH THIS SYSTEM AND STICKING WITH AVN.

THUS TUE DRY UNDER BLDG HI PRESSURE. BUT RETURN FLOW ARND SFC HIGH
BRINGING MSTR UP THRU PLAINS ON TUESDAY. THIS MSTR FINDING LIFT BY
WEAK WAVE ALG 5H RIDGE OVER IA TUES NGT. WAVES SLIDING UP OVER RIDGE
INTO WI LT TUES NGT AND SLIPPING EAST JUST OVER IL BORDER. RESORTING
TO ETA AGAIN SHOWS WV PASSING ACROSS NRN WI. QUESTIONABLE AS TO
WHETHER CHC OF RAIN IS NEEDED NRN CNTYS ERY WED AM FROM PROXIMITY OR
FROM ANY OUTFLOWS THAT MAY DROP DOWN INTO IL.

CONSIDERING FLIP FLOP OF QPF WITH THIS CURRENT EVENT...WILL HOLD OFF
PUTTING IN CHC PCPN TUES NGT/WED AND LV PARTLY TO MOSTLY CLDY WED.

CONTD PUMPING OF GULF MSTR INTO PLAINS WARMS THINGS UP AGAIN ALG
WITH RAISING DEWPTS TO 70-ISH AGAIN FOR MIDWEEK.

ANOTHER WAVE DROPPING DOWN ACROSS NRN PLAINS THURSDAY WILL AGAIN
LIFT THIS MSTR ACROSS MN THURSDAY...MOVING EAST ACRS WI AGAIN THURS
NGT AND DRAGGING A COLD FNT THRU NRN IL/NW IN ON FRIDAY. THIS FNT
STAGNATING ACROSS NRN IL/NRN BY FRI EVE...RETURNING FRI NGT AS A
WARM FNT AS A SECONDARY WAVE APPROACHES FROM THE NW. THIS MAIN UPR
TROF PUSHING THRU BY SAT MRNG WITH STRONG COLD FNT AND BLDG HIGH
PRESS BEHIND IT THRU SUNDAY.

TEMPS PRETTY CLOSE AND WILL ABIDE...LEANING TO WARMER VALUES WHERE
DIFFS ARISE.

.CHI...NONE

BRUMER

Flash Flood Warnings in Illinois, 2002Every flash flood warning in 2002

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.