Alert archive / Illinois / Flash Flood Warnings in 2011

Flash Flood Warning 9, NWS Lincoln, IL

April 22, 2011Menard County, Illinois

NWS Lincoln, IL issued this flash flood warning at Apr 22, 2011, 12:20 PM CDT for Menard County, Illinois. It was in force for 2 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 22, 2011, 12:20 PM CDT (17:20 UTC)
Expired: Apr 22, 2011, 2:32 PM CDT
In force: 2 hr
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Flood severity: None

County Menard County, IL

The radar

The Lincoln radar (KILX), 36 km from the middle of the area, began a volume at 17:21 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, 5.3 hours before the alert went out and 98 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.

559 
WGUS53 KILX 221720
FFWILX
ILC129-222330-
/O.NEW.KILX.FF.W.0009.110422T1720Z-110422T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
1220 PM CDT FRI APR 22 2011

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  MENARD COUNTY IN CENTRAL ILLINOIS...

* UNTIL 630 PM CDT

* AT 1218 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE   
  WARNED AREA. RAINFALL AMOUNTS OF NEAR 2 INCHES HAVE FALLEN FROM 
  THESE STORMS...WITH ADDITIONAL RAINFALL OF UP TO 1 INCH EXPECTED.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  ATHENS...GREENVIEW...PETERSBURG AND TALLULA.

EMERGENCY MANAGEMENT REPORTS WATER OVER A ROAD NEAR THE ATHENS AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...
COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND
OTHER LOW LYING AREAS ARE SUBJECT TO FLOODING.

&&

LAT...LON 4012 8999 4013 8974 4016 8966 4015 8963
      4012 8961 4008 8961 4009 8959 3998 8959
      3997 8970 3992 8971 3992 8977 3990 8978
      3991 9000

$$

GOETSCH

1 follow-up statement

816 
WGUS73 KILX 221932
FFSILX

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

ILC129-221945-
/O.CAN.KILX.FF.W.0009.000000T0000Z-110422T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MENARD IL-
232 PM CDT FRI APR 22 2011

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR MENARD COUNTY 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.

ADDITIONAL RAINFALL IS EXPECTED TO DEVELOP LATER TODAY AND TONIGHT.
REMAIN ALERT FOR LATER STATEMENTS AND POSSIBLE NEW WARNINGS FOR 
NEW RAINFALL THAT MOVES INTO THE AREA.  

LAT...LON 4012 8999 4013 8974 4016 8966 4015 8963
      4012 8961 4008 8961 4009 8959 3998 8959
      3997 8970 3992 8971 3992 8977 3990 8978
      3991 9000

$$

GOETSCH

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, 12:41 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, 2:12 PM CDT	Flash Flood Warning	ILX	Lawrence	4 hr
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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.