Alert archive / Illinois / Flash Flood Warnings in 2011

Flash Flood Warning 10, NWS Lincoln, IL

April 22, 2011Lawrence County, Illinois

NWS Lincoln, IL issued this flash flood warning at Apr 22, 2011, 2:12 PM CDT for Lawrence County, Illinois. It was in force for 4 hr. 1 report 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, 2:12 PM CDT (19:12 UTC)
Expired: Apr 22, 2011, 5:42 PM CDT
In force: 4 hr
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Flood severity: None

County Lawrence County, IL

The radar

The Evansville,IN radar (KVWX), 46 km from the middle of the area, began a volume at 19:14 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, 2:40 PM CDT	HEAVY RAIN 1.69	Lawrenceville, IL	SINCE 7 CDT

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, 7.2 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 845 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 585 m²/s²
0-3 km storm-relative helicity: 683 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

568 
WGUS53 KILX 221912
FFWILX
ILC101-230100-
/O.NEW.KILX.FF.W.0010.110422T1912Z-110423T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

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

* UNTIL 800 PM CDT

* AT 209 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE
  WARNED AREA. RAINFALL ESTIMATES WERE IN THE 1 TO 2 INCH RANGE.

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

AT 205 PM...A TRAINED WEATHER SPOTTER REPORTED HEAVY RAINFALL 
AND 6 TO 10 INCHES OF WATER ON MOST CITY STREETS IN LAWRENCEVILLE. 
IN ADDITION...ALL THE DITCHES WERE FULL AND SOME WERE SPILLING 
WATER ONTO THE ROADS BETWEEN THE CRAWFORD COUNTY LINE AND 
LAWRENCEVILLE.

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.

&&

LAT...LON 3858 8791 3885 8790 3885 8755 3879 8752
      3869 8752 3867 8759 3864 8762 3860 8762
      3859 8764 3857 8765

$$

GOETSCH

1 follow-up statement

339 
WGUS73 KILX 222242
FFSILX

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

ILC101-222257-
/O.CAN.KILX.FF.W.0010.000000T0000Z-110423T0100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LAWRENCE IL-
542 PM CDT FRI APR 22 2011

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR LAWRENCE COUNTY IS
CANCELLED...

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

LAT...LON 3858 8791 3885 8790 3885 8755 3879 8752
      3869 8752 3867 8759 3864 8762 3860 8762
      3859 8764 3857 8765

$$

AUTEN

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 22, 8:48 AM CDT	Severe Thunderstorm Warning	ILX	Morgan, Scott	27 min
Apr 22, 10:41 AM CDT	Special Weather Statement	ILX	Macon	34 min
Apr 22, 12:07 PM CDT	Flash Flood Warning	ILX	Cass, Morgan, Scott	6 hr
Apr 22, 12:20 PM CDT	Flash Flood Warning	ILX	Menard	2 hr
Apr 22, 12:41 PM CDT	Severe Thunderstorm Warning	ILX	Clay, Effingham, Jasper, Richland	49 min
Apr 22, 1:23 PM CDT	Severe Thunderstorm Warning	ILX	Crawford, Jasper, Lawrence, Richland	37 min
Apr 22, 1:37 PM CDT	Severe Thunderstorm Warning	ILX	Lawrence, Richland	23 min
Apr 22, 2:35 PM CDT	River Flood Warning	ILX	Crawford, Jasper	12 days
Apr 22, 6:29 PM CDT	River Flood Warning	ILX	Fulton, Knox	56 hr

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.