Alert archive / Illinois / Flash Flood Warnings in 2011

Flash Flood Warning 66, NWS Lincoln, IL

July 12, 2011Crawford County, Jasper County, Illinois

NWS Lincoln, IL issued this flash flood warning at Jul 12, 2011, 6:28 PM CDT for Crawford County, Jasper County, Illinois. It was in force for 5 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: Jul 12, 2011, 6:28 PM CDT (23:28 UTC)
Expired: Jul 12, 2011, 11:43 PM CDT
In force: 5 hr
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Flood severity: None

Counties Crawford County, IL, Jasper County, IL

The radar

The Evansville,IN radar (KVWX), 76 km from the middle of the area, began a volume at 23:29 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 12:00Z, 11.5 hours before the alert went out and 158 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.

968 
WGUS53 KILX 122328
FFWILX
ILC033-079-130530-
/O.NEW.KILX.FF.W.0066.110712T2328Z-110713T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CRAWFORD COUNTY IN EAST CENTRAL ILLINOIS...
  SOUTHEASTERN JASPER COUNTY IN SOUTHEAST ILLINOIS...

* UNTIL 1230 AM CDT

* AT 627 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE 
  WARNED AREA...ESPECIALLY SOUTHEAST JASPER COUNTY AND SOUTHWEST 
  CRAWFORD COUNTY. RADAR ESTIMATES THAT RAINFALL AMOUNTS HAVE 
  REACHED OVER 2 INCHES IN LESS THAN ONE HOUR. AND ADDITIONAL INCH 
  OR TWO OF RAIN WILL BE POSSIBLE THROUGH 8 PM.

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

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 3891 8752 3890 8752 3889 8754 3885 8755
      3885 8815 3906 8812 3906 8757 3900 8757
      3896 8751 3892 8751

$$

SHIMON

1 follow-up statement

236 
WGUS73 KILX 130443
FFSILX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
1143 PM CDT TUE JUL 12 2011

ILC033-079-130458-
/O.CAN.KILX.FF.W.0066.000000T0000Z-110713T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JASPER IL-CRAWFORD IL-
1143 PM CDT TUE JUL 12 2011

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR CRAWFORD AND
SOUTHEASTERN 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 3891 8752 3890 8752 3889 8754 3885 8755
      3885 8815 3906 8812 3906 8757 3900 8757
      3896 8751 3892 8751

$$

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, 5:45 PM CDT	Flash Flood Warning	ILX	Lawrence, Richland	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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.