Alert archive / Illinois / Flash Flood Warnings in 2011

Flash Flood Warning 15, NWS Lincoln, IL

April 25, 20114 counties in Illinois

NWS Lincoln, IL issued this flash flood warning at Apr 25, 2011, 10:29 PM CDT for 4 counties in Illinois. It was in force for 9 hr. 17 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, 10:29 PM CDT (03:29 UTC)
Expired: Apr 26, 2011, 7:30 AM CDT
In force: 9 hr
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Flood severity: None

Counties Clark County, IL, Crawford County, IL, Edgar County, IL, Lawrence County, IL

The radar

The Evansville,IN radar (KVWX), 95 km from the middle of the area, began a volume at 03:31 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 26, 12:00 AM CDT	HEAVY RAIN 1.4	2 Ne Martinsville, IL	24-HOUR RAINFALL TOTAL ENDING AT MIDNIGHT
Apr 26, 4:08 AM CDT	FLASH FLOOD	3 Sse Vermilion, IL	MIDWESTERN GAS STREET WASHED OUT IN RURAL EDGAR COUNTY.
Apr 26, 4:30 AM CDT	FLASH FLOOD	2 N Hutsonville, IL	WATER OVER THE ROAD NEAR CIPS TO THE NORTH OF HUTSONVILLE.
Apr 26, 5:22 AM CDT	FLASH FLOOD	1 S Sumner, IL	WATER OVER THE ROAD
Apr 26, 5:22 AM CDT	FLASH FLOOD	Bridgeport, IL	WATER OVER MANY STREETS IN BRIDGEPORT.
Apr 26, 6:00 AM CDT	HEAVY RAIN 1.45	3 W Birds, IL	24 HOUR ACCUMULATION
Apr 26, 6:00 AM CDT	HEAVY RAIN 1.75	10 S Martinsville, IL
Apr 26, 6:00 AM CDT	HEAVY RAIN 1.95	Lawrenceville, IL
Apr 26, 6:37 AM CDT	HEAVY RAIN 1.67	Martinsville, IL
Apr 26, 6:51 AM CDT	HEAVY RAIN 1.82	Vermilion, IL
Apr 26, 6:55 AM CDT	HEAVY RAIN 0	2 E Birds, IL	24-HOUR TOTAL...4.64 INCHES THE PAST 4 DAYS.
Apr 26, 7:00 AM CDT	HEAVY RAIN 1.51	Paris, IL
Apr 26, 7:00 AM CDT	HEAVY RAIN 1.91	2 E Birds, IL
Apr 26, 7:00 AM CDT	HEAVY RAIN 2.24	Robinson, IL
Apr 26, 7:00 AM CDT	HEAVY RAIN 2.4	3 W Robinson, IL
Apr 26, 7:00 AM CDT	HEAVY RAIN 2.51	Hutsonville, IL
Apr 26, 7:30 AM CDT	HEAVY RAIN 1.65	Casey, 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 00:00Z, 3.5 hours before the alert went out and 138 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.

811 
WGUS53 KILX 260329
FFWILX
ILC023-033-045-101-261230-
/O.NEW.KILX.FF.W.0015.110426T0329Z-110426T1230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
1029 PM CDT MON APR 25 2011

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CLARK COUNTY IN EAST CENTRAL ILLINOIS...
  CRAWFORD COUNTY IN EAST CENTRAL ILLINOIS...
  EDGAR COUNTY IN EAST CENTRAL ILLINOIS...
  LAWRENCE COUNTY IN SOUTHEAST ILLINOIS...

* UNTIL 730 AM CDT TUESDAY

* AT 1029 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...
  LAWRENCEVILLE...MARSHALL...PARIS...ROBINSON...ANNAPOLIS...BIRDS...
  BRIDGEPORT...BROCTON...CASEY...CHAUNCEY...CHRISMAN...CLARKSVILLE...
  DENNISON...EATON...FLAT ROCK...HARDINVILLE...HUME...HUTSONVILLE...
  KANSAS...MARTINSVILLE...NEW HEBRON...OBLONG...OLIVER...PALESTINE...
  REDMON...ST. FRANCISVILLE...SUMNER...VERMILION...WEST UNION AND   
  WESTFIELD.

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 3864 8762 3857 8764 3857 8791 3917 8795
      3918 8801 3937 8802 3948 8801 3948 8796
      3988 8793 3988 8754 3935 8752 3931 8761
      3921 8757 3914 8765 3906 8757 3899 8757
      3899 8758 3895 8751 3886 8755 3874 8750

$$

BAK

1 follow-up statement

123 
WGUS73 KILX 260615
FFSILX

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

ILC023-033-045-101-261230-
/O.CON.KILX.FF.W.0015.000000T0000Z-110426T1230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LAWRENCE IL-CLARK IL-CRAWFORD IL-EDGAR IL-
115 AM CDT TUE APR 26 2011

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR EDGAR...CRAWFORD...CLARK
AND LAWRENCE COUNTIES UNTIL 730 AM CDT...

AT 113 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA. ONE 
TO TWO INCHES OF RAIN HAS ALREADY FALLEN OVER THE AREA. AN 
ADDITIONAL ONE TO TWO INCHES OF RAINFALL WILL BE LIKELY BY DAWN.

RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLASH FLOODING INCLUDE...
LAWRENCEVILLE...MARSHALL...PARIS...ROBINSON...ANNAPOLIS...BIRDS...
BRIDGEPORT...BROCTON...CASEY...CHAUNCEY...CHRISMAN...CLARKSVILLE...
DENNISON...EATON...FLAT ROCK...HARDINVILLE...HUME...HUTSONVILLE...
KANSAS...MARTINSVILLE...NEW HEBRON...OBLONG...OLIVER...PALESTINE...
REDMON...ST. FRANCISVILLE...SUMNER...VERMILION...WEST UNION AND
WESTFIELD.

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 3864 8762 3857 8764 3857 8791 3917 8795
      3918 8801 3937 8802 3948 8801 3948 8796
      3988 8793 3988 8754 3935 8752 3931 8761
      3921 8757 3914 8765 3906 8757 3899 8757
      3899 8758 3895 8751 3886 8755 3874 8750

$$

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, 9:19 PM CDT	Flash Flood Warning	ILX	Clay, Jasper, Richland	8 hr
Apr 25, 10:12 PM CDT	Flash Flood Warning	ILX	Douglas	8 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.