Alert archive / Illinois / Flash Flood Warnings in 2011

Flash Flood Warning 13, NWS Lincoln, IL

April 25, 2011Clay County, Jasper County, Richland County, Illinois

NWS Lincoln, IL issued this flash flood warning at Apr 25, 2011, 9:19 PM CDT for Clay County, Jasper County, Richland County, Illinois. It was in force for 8 hr. 2 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 25, 2011, 9:19 PM CDT (02:19 UTC)
Expired: Apr 26, 2011, 5:43 AM CDT
In force: 8 hr
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Flood severity: None

Counties Clay County, IL, Jasper County, IL, Richland County, IL

The radar

The Evansville,IN radar (KVWX), 73 km from the middle of the area, began a volume at 02:22 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 25, 10:33 PM CDT	FLASH FLOOD	Flora, IL	WATER COVERING SEVERAL STREETS IN FLORA.
Apr 25, 10:33 PM CDT	FLASH FLOOD	Xenia, IL	SEVERAL STREETS ARE COVERED WITH WATER IN XENIA.

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, 2.3 hours before the alert went out and 154 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: 48 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 580 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 83 m²/s²
0-3 km storm-relative helicity: 159 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.

633 
WGUS53 KILX 260219
FFWILX
ILC025-079-159-261130-
/O.NEW.KILX.FF.W.0013.110426T0219Z-110426T1130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
919 PM CDT MON APR 25 2011

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CLAY COUNTY IN SOUTH CENTRAL ILLINOIS...
  JASPER COUNTY IN SOUTHEAST ILLINOIS...
  RICHLAND COUNTY IN SOUTHEAST ILLINOIS...

* UNTIL 630 AM CDT TUESDAY

* AT 918 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE
  WARNED AREA. RADAR INDICATED UP AN INCH OF RAIN HAD FALLEN IN THE
  PAST HOUR ACROSS A PORTION OF THE WARNING AREA.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  FLORA...NEWTON...OLNEY...BIBLE GROVE...BOGOTA...CALHOUN...
  CLAREMONT...CLAY CITY...DUNDAS...HIDALGO...INGAHAM...IOLA...
  LOUISVILLE...NOBLE...PARKERSBURG...SAILOR SPRINGS...
  SCHNELL...STE.   MARIE...WEST LIBERTY...WHEELER...WILLOW HILL AND
  XENIA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3860 8815 3861 8870 3891 8869 3891 8836
      3917 8836 3917 8795 3885 8794 3885 8791
      3857 8792 3857 8815

$$

BAK

2 follow-up statements

063 
WGUS73 KILX 260447
FFSILX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
1147 PM CDT MON APR 25 2011

ILC025-079-159-261130-
/O.CON.KILX.FF.W.0013.000000T0000Z-110426T1130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JASPER IL-RICHLAND IL-CLAY IL-
1147 PM CDT MON APR 25 2011

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR CLAY...RICHLAND AND
JASPER COUNTIES UNTIL 630 AM CDT TUESDAY...

AT 1146 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA. 
RAINFALL TOTALS IN EXCESS OF 2 INCHES HAVE FALLEN ACROSS A PORTION 
OF THE WARNED AREA SINCE 8 PM.

RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE...
FLORA...NEWTON...OLNEY...BIBLE GROVE...BOGOTA...CALHOUN...
CLAREMONT...CLAY CITY...DUNDAS...HIDALGO...INGAHAM...IOLA...
LOUISVILLE...NOBLE...PARKERSBURG...SAILOR SPRINGS...SCHNELL...STE.
MARIE...WEST LIBERTY...WHEELER...WILLOW HILL AND XENIA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3860 8815 3861 8870 3891 8869 3891 8836
      3917 8836 3917 8795 3885 8794 3885 8791
      3857 8792 3857 8815

$$

BAK

512 
WGUS73 KILX 261043
FFSILX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
543 AM CDT TUE APR 26 2011

ILC025-079-159-261058-
/O.CAN.KILX.FF.W.0013.000000T0000Z-110426T1130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JASPER IL-RICHLAND IL-CLAY IL-
543 AM CDT TUE APR 26 2011

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR CLAY...RICHLAND 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 3860 8815 3861 8870 3891 8869 3891 8836
      3917 8836 3917 8795 3885 8794 3885 8791
      3857 8792 3857 8815

$$

CHURCHILL

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 25, 8:43 PM CDT	Flash Flood Warning	ILX	Coles, Cumberland, Effingham, Moultrie, Shelby	9 hr
Apr 25, 10:12 PM CDT	Flash Flood Warning	ILX	Douglas	8 hr
Apr 25, 10:29 PM CDT	Flash Flood Warning	ILX	Clark, Crawford, Edgar, Lawrence	9 hr
Apr 26, 7:26 AM CDT	Areal Flood Warning	ILX	Crawford, Lawrence	4 hr
Apr 26, 7:30 AM CDT	Areal Flood Warning	ILX	Edgar	4 hr
Apr 26, 11:09 AM CDT	River Flood Warning	ILX	Vermilion	34 hr
Apr 26, 11:22 AM CDT	Areal Flood Warning	ILX	Edgar	6 hr
Apr 26, 11:24 AM CDT	Areal Flood Warning	ILX	Crawford, Lawrence	6 hr
Apr 26, 12:03 PM CDT	Special Weather Statement	ILX	Christian, Macon	57 min

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.