Alert archive / Illinois / Flash Flood Warnings in 2011

Flash Flood Warning 18, NWS Lincoln, IL

April 27, 20115 counties in Illinois

NWS Lincoln, IL issued this flash flood warning at Apr 27, 2011, 7:25 PM CDT for 5 counties in Illinois. It was in force for 3 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: Apr 27, 2011, 7:25 PM CDT (00:25 UTC)
Expired: Apr 27, 2011, 10:33 PM CDT
In force: 3 hr
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Flood severity: None

Counties Clark County, IL, Clay County, IL, Cumberland County, IL, Effingham County, IL, Jasper County, IL

The radar

The Evansville,IN radar (KVWX), 108 km from the middle of the area, began a volume at 00:25 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 00:00Z, 0.4 hours before the alert went out and 115 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: 695 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 62 m²/s²
0-3 km storm-relative helicity: 99 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.

249 
WGUS53 KILX 280025
FFWILX
ILC023-025-035-049-079-280430-
/O.NEW.KILX.FF.W.0018.110428T0025Z-110428T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
725 PM CDT WED APR 27 2011

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CLARK COUNTY IN EAST CENTRAL ILLINOIS...
  CUMBERLAND COUNTY IN EAST CENTRAL ILLINOIS...
  EFFINGHAM COUNTY IN SOUTH CENTRAL ILLINOIS...
  NORTHWESTERN CLAY COUNTY IN SOUTH CENTRAL ILLINOIS...
  NORTHWESTERN JASPER COUNTY IN SOUTHEAST ILLINOIS...

* UNTIL 1130 PM CDT

* AT 723 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  THUNDERSTORMS WITH VERY HEAVY RAINFALL MOVING ACROSS THE WARNED    
  AREA. ONE TO 1.5 INCHES OF RAINFALL IS POSSIBLE OVER THE NEXT      
  COUPLE OF HOURS.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  EFFINGHAM...MARSHALL...TOLEDO...ALTAMONT...BEECHER CITY...CASEY...
  CLARKSVILLE...DENNISON...DIETERICH...EDGEWOOD...GREENUP...HAZEL
  DELL...JANESVILLE...JEWETT...MARTINSVILLE...MONTROSE...NEOGA...
  SHUMWAY...TEUTOPOLIS...WATSON...WEST UNION AND WESTFIELD.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL AMOUNTS OF ONE TO 1.5 INCHES ARE POSSIBLE IN THE 
WARNED AREA.

&&

LAT...LON 3933 8756 3931 8761 3926 8760 3926 8757
      3919 8759 3916 8764 3918 8775 3917 8831
      3891 8836 3884 8870 3891 8870 3891 8880
      3892 8881 3922 8880 3922 8847 3937 8847
      3938 8802 3948 8801 3948 8753

$$

AUTEN

1 follow-up statement

436 
WGUS73 KILX 280333
FFSILX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
1033 PM CDT WED APR 27 2011

ILC023-025-035-049-079-280349-
/O.CAN.KILX.FF.W.0018.000000T0000Z-110428T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JASPER IL-CLARK IL-CLAY IL-CUMBERLAND IL-EFFINGHAM IL-
1033 PM CDT WED APR 27 2011

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR EFFINGHAM...
CUMBERLAND...NORTHWESTERN CLAY...CLARK AND NORTHWESTERN 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 3933 8756 3931 8761 3926 8760 3926 8757
      3919 8759 3916 8764 3918 8775 3917 8831
      3891 8836 3884 8870 3891 8870 3891 8880
      3892 8881 3922 8880 3922 8847 3937 8847
      3938 8802 3948 8801 3948 8753

$$

AUTEN

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 27, 9:54 PM CDT	Areal Flood Advisory	ILX	Vermilion	6 hr
Apr 27, 10:40 PM CDT	Areal Flood Advisory	ILX	Clay, Crawford, Effingham, Jasper, Lawrence, Richland	6 hr
Apr 28, 2:44 AM CDT	River Flood Warning	ILX	Vermilion	36 hr
Apr 28, 4:32 AM CDT	Areal Flood Advisory	ILX	Crawford, Effingham, Jasper, Lawrence	6 hr
Apr 28, 10:30 AM CDT	Areal Flood Advisory	ILX	Lawrence	69 min
Apr 28, 11:27 AM CDT	Areal Flood Warning	ILX	Lawrence	6 hr
Apr 28, 3:14 PM CDT	Special Weather Statement	ILX	Crawford, Jasper, Lawrence	61 min
Apr 28, 5:34 PM CDT	Areal Flood Warning	ILX	Lawrence	6 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.