Alert archive / Illinois / Flash Flood Warnings in 2011

Flash Flood Warning 11, NWS Lincoln, IL

April 22, 20114 counties in Illinois

NWS Lincoln, IL issued this flash flood warning at Apr 22, 2011, 10:17 PM CDT for 4 counties in Illinois. It was in force for 5 hr. 3 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Apr 22, 2011, 10:17 PM CDT (03:17 UTC)
Expired: Apr 23, 2011, 3:39 AM CDT
In force: 5 hr
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Flood severity: None

Counties Clay County, IL, Crawford County, IL, Effingham County, IL, Jasper County, IL

The radar

The Evansville,IN radar (KVWX), 83 km from the middle of the area, began a volume at 03:18 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.

What was reported inside it

Time	Report	Where	Remark
Apr 22, 10:40 PM CDT	FLASH FLOOD	1 Ne Robinson, IL	WATER COVERING ROADS. ROUTE 1150 BY THE COUNTRY CLUB IS CLOSED.
Apr 22, 11:15 PM CDT	FLASH FLOOD	Newton, IL	STREETS FLOODED IN NEWTON.
Apr 22, 11:15 PM CDT	FLASH FLOOD	Ste. Marie, IL	SPUR ROAD AND COUNTY ROAD 600N UNDER WATER.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 3.3 hours before the alert went out and 140 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: 342 J/kg
Mixed-layer CIN: -152 J/kg
Mixed-layer LCL: 492 m above ground
0-6 km bulk shear: 69 kt
0-1 km storm-relative helicity: 351 m²/s²
0-3 km storm-relative helicity: 346 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

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

665 
WGUS53 KILX 230317
FFWILX
ILC025-033-049-079-230900-
/O.NEW.KILX.FF.W.0011.110423T0317Z-110423T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
1017 PM CDT FRI APR 22 2011

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CRAWFORD COUNTY IN EAST CENTRAL ILLINOIS...
  EFFINGHAM COUNTY IN SOUTH CENTRAL ILLINOIS...
  JASPER COUNTY IN SOUTHEAST ILLINOIS...
  NORTHERN CLAY COUNTY IN SOUTH CENTRAL ILLINOIS...

* UNTIL 400 AM CDT

* AT 1014 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE
  WARNED AREA. RAINFALL AMOUNTS HAVE AVERAGED 1 TO 1.5 INCHES...
  WITH ADDITIONAL RAINFALL AMOUNTS OF UP TO THREE QUARTERS OF AN
  INCH POSSIBLE.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  EFFINGHAM...NEWTON...ROBINSON...ALTAMONT...ANNAPOLIS...BIBLE
  GROVE...BOGOTA...DIETERICH...EATON...EDGEWOOD...FLAT ROCK...
  HARDINVILLE...HIDALGO...HUTSONVILLE...INGAHAM...IOLA...
  LOUISVILLE...MONTROSE...NEW HEBRON...OBLONG...PALESTINE...STE.
  MARIE...TEUTOPOLIS...WATSON...WEST LIBERTY...WHEELER AND WILLOW
  HILL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. DO
NOT ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND TO
ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN
WATER BEGINS RISING.

&&

LAT...LON 3887 8754 3885 8755 3885 8826 3867 8869
      3892 8868 3891 8880 3914 8880 3917 8847
      3917 8766 3914 8765 3911 8762 3900 8757
      3894 8752

$$

GOETSCH

2 follow-up statements

970 
WGUS73 KILX 230441
FFSILX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
1141 PM CDT FRI APR 22 2011

ILC025-049-230450-
/O.CAN.KILX.FF.W.0011.000000T0000Z-110423T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CLAY IL-EFFINGHAM IL-
1141 PM CDT FRI APR 22 2011

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR EFFINGHAM AND
NORTHERN CLAY COUNTIES IS CANCELLED...

EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. STREAMS
AND CREEKS IN THE WARNED AREA HAVE RECEDED OR WERE BEGINNING TO
RECEDE...ENDING THE FLOOD THREAT. IF FLOODING HAS BEEN OBSERVED...
PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY.

LAT...LON 3887 8754 3885 8755 3885 8835 3917 8836
      3917 8766 3900 8757 3894 8752

$$

ILC033-079-230900-
/O.CON.KILX.FF.W.0011.000000T0000Z-110423T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JASPER IL-CRAWFORD IL-
1141 PM CDT FRI APR 22 2011

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR CRAWFORD AND JASPER
COUNTIES UNTIL 400 AM CDT...

AT 1140 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
SHOWERS THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED 
AREA SOUTHEAST OF I-70. RADAR ESTIMATED BETWEEN 2 AND 3 INCHES OF 
RAIN HAS FALLEN ALONG A LINE FROM NEWTON TO ROBINSON IN CENTRAL 
PARTS OF JASPER AND CRAWFORD COUNTIES THIS EVENING WITH LOCALLY 
HIGHER AMOUNTS. FLOODING WAS REPORTED IN PARTS OF NEWTON AND STE 
MARIE IN JASPER COUNTY AND ACROSS CENTRAL CRAWFORD COUNTY ESPECIALLY 
AROUND ROBINSON.  

RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE...
NEWTON...ROBINSON...ANNAPOLIS...BOGOTA...EATON...FLAT ROCK...
HARDINVILLE...HIDALGO...HUTSONVILLE...NEW HEBRON...OBLONG...
PALESTINE...STE. MARIE...WEST LIBERTY...WHEELER AND WILLOW HILL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL AMOUNTS UP TO A HALF INCH ARE POSSIBLE IN THE 
WARNED AREA SOUTHEAST OF I-70 UNTIL 1 AM.

EXCESSIVE RUNOFF FROM HEAVY RAINS THIS EVENING WILL CAUSE FLOODING 
OF SMALL CREEKS AND STREAMS...COUNTRY ROADS...NORMALLY DRY WASHES... 
AS WELL AS FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLOODING IS OBSERVED...ACT QUICKLY. DO NOT
ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND. DO NOT
STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

&&

LAT...LON 3887 8754 3885 8755 3885 8835 3917 8836
      3917 8766 3900 8757 3894 8752

$$

HUETTL

056 
WGUS73 KILX 230839
FFSILX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
339 AM CDT SAT APR 23 2011

ILC033-079-230852-
/O.CAN.KILX.FF.W.0011.000000T0000Z-110423T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JASPER IL-CRAWFORD IL-
339 AM CDT SAT APR 23 2011

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR CRAWFORD AND JASPER
COUNTIES IS CANCELLED...

EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. STREAMS
AND CREEKS IN THE WARNED AREA HAVE RECEDED OR WERE BEGINNING TO
RECEDE...ENDING THE FLOOD THREAT. IF FLOODING HAS BEEN OBSERVED...
PLEASE REPORT IT TO YOUR LOCAL LAW ENFORCEMENT AGENCY.

LAT...LON 3887 8754 3885 8755 3885 8835 3917 8836
      3917 8766 3900 8757 3894 8752

$$

CHURCHILL

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 22, 7:35 PM CDT	Severe Thunderstorm Warning	ILX	Fulton, Schuyler	40 min
Apr 22, 8:14 PM CDT	Severe Thunderstorm Warning	ILX	Fulton, Peoria	31 min
Apr 22, 10:41 PM CDT	Severe Thunderstorm Warning	ILX	Crawford, Lawrence	21 min
Apr 23, 11:09 AM CDT	River Flood Warning	ILX	Marshall, Putnam	15 days
Apr 23, 11:09 AM CDT	River Flood Warning	ILX	Peoria, Tazewell, Woodford	19 days
Apr 23, 11:43 AM CDT	River Flood Warning	ILX	Cass, Mason	9 days

Nearby

Flash Flood Warnings in Illinois, 2011 Every flash flood warning in 2011

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.