Alert archive / Illinois / Flash Flood Warnings in 2011

Flash Flood Warning 65, NWS Lincoln, IL

July 12, 2011Lawrence County, Richland County, Illinois

NWS Lincoln, IL issued this flash flood warning at Jul 12, 2011, 5:45 PM CDT for Lawrence County, Richland County, 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: Jul 12, 2011, 5:45 PM CDT (22:45 UTC)
Expired: Jul 12, 2011, 11:14 PM CDT
In force: 5 hr
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Flood severity: None

Counties Lawrence County, IL, Richland County, IL

The radar

The Evansville,IN radar (KVWX), 49 km from the middle of the area, began a volume at 22:45 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
Jul 12, 7:30 PM CDT	FLASH FLOOD	Lawrenceville, IL	SEVERAL INCHES OF WATER FLOWING OVER 13TH STREET. TIME ESTIMATED.
Jul 12, 7:30 PM CDT	FLASH FLOOD	Sumner, IL	SEVERAL INCHES OF WATER FLOWING OVER HIGHWAY 250 AT SUMNER. TIME ESTIMATED.
Jul 12, 7:30 PM CDT	HEAVY RAIN 1.65	Lawrenceville, IL

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 12:00Z, 10.8 hours before the alert went out and 182 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: 1615 J/kg
Mixed-layer CIN: -167 J/kg
Mixed-layer LCL: 777 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: -4 m²/s²
0-3 km storm-relative helicity: -14 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

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

156 
WGUS53 KILX 122245
FFWILX
ILC101-159-130430-
/O.NEW.KILX.FF.W.0065.110712T2245Z-110713T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
545 PM CDT TUE JUL 12 2011

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EASTERN RICHLAND COUNTY IN SOUTHEAST ILLINOIS...
  LAWRENCE COUNTY IN SOUTHEAST ILLINOIS...

* UNTIL 1130 PM CDT

* AT 543 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE   
  WARNED AREA...ESPECIALLY FAR WESTERN LAWRENCE COUNTY AND FAR       
  EASTERN RICHLAND COUNTY...BETWEEN SUMNER AND CLAREMONT. RAINFALL 
  AMOUNTS OF AROUND 2 INCHES IN THE LAST HOUR ARE INDICATED BY 
  RADAR. AN ADDITIONAL INCH OR TWO OF RAIN WILL BE POSSIBLE FROM THE 
  SLOW MOVING THUNDERSTORMS.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  LAWRENCEVILLE...BIRDS...BRIDGEPORT...CHAUNCEY...CLAREMONT...
  RUSSELLVILLE...ST. FRANCISVILLE AND SUMNER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.

&&

LAT...LON 3868 8753 3866 8760 3861 8762 3859 8761
      3859 8763 3856 8766 3857 8798 3884 8799
      3885 8752 3882 8752 3879 8749 3874 8749

$$

SHIMON

1 follow-up statement

599 
WGUS73 KILX 130414
FFSILX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
1114 PM CDT TUE JUL 12 2011

ILC101-159-130430-
/O.CAN.KILX.FF.W.0065.000000T0000Z-110713T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LAWRENCE IL-RICHLAND IL-
1114 PM CDT TUE JUL 12 2011

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR EASTERN RICHLAND
AND LAWRENCE 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 3868 8753 3866 8760 3861 8762 3859 8761
      3859 8763 3856 8766 3857 8798 3884 8799
      3885 8752 3882 8752 3879 8749 3874 8749

$$

SHIMON

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 12, 3:42 PM CDT	Special Weather Statement	ILX	Clay	63 min
Jul 12, 3:56 PM CDT	Special Weather Statement	ILX	Sangamon	64 min
Jul 12, 4:21 PM CDT	Flash Flood Warning	ILX	Clay	6 hr
Jul 12, 4:46 PM CDT	Severe Thunderstorm Warning	ILX	Scott	44 min
Jul 12, 5:39 PM CDT	Severe Thunderstorm Warning	ILX	Lawrence	51 min
Jul 12, 6:28 PM CDT	Flash Flood Warning	ILX	Crawford, Jasper	5 hr
Jul 12, 6:37 PM CDT	Severe Thunderstorm Warning	ILX	Crawford, Lawrence	38 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.