Alert archive / Illinois / Flash Flood Warnings in 2011

Flash Flood Warning 44, NWS St. Louis, MO

June 13, 2011Brown County, Pike County, Illinois

NWS St. Louis, MO issued this flash flood warning at Jun 13, 2011, 5:41 PM CDT for Brown County, Pike County, Illinois. It was in force for 6 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: Jun 13, 2011, 5:41 PM CDT (22:41 UTC)
Expired: Jun 13, 2011, 11:30 PM CDT
In force: 6 hr
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Flood severity: None

Counties Brown County, IL, Pike County, IL

The radar

The St Louis radar (KLSX), 120 km from the middle of the area, began a volume at 22:41 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, 10.7 hours before the alert went out and 185 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: 1547 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: -4 m²/s²
0-3 km storm-relative helicity: 106 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.

876 
WGUS53 KLSX 132241
FFWLSX
ILC009-149-140430-
/O.NEW.KLSX.FF.W.0044.110613T2241Z-110614T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
541 PM CDT MON JUN 13 2011

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHEASTERN PIKE COUNTY IN WEST CENTRAL ILLINOIS...
  SOUTHERN BROWN COUNTY IN WEST CENTRAL ILLINOIS...

* UNTIL 1130 PM CDT

* AT 537 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED  
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE
  WARNED AREA. THE MC KEE CREEK BASIN IN ADAMS COUNTY AND SOUTHWEST
  BROWN COUNTY HAS BEEN ESPECIALLY HARD IT.  EXPECT THE RUNOFF FROM 
  THIS VERY HEAVY RAIN TO CAUSE FLASH FLOODING ALL ALONG THE BASIN
  IN SOUTHERN BROWN AND NORTHERN PIKE COUNTIES.   

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... 
  CHAMBERSBURG...AND RURAL PORTIONS OF SOUTHERN BROWN AND NORTHERN
  PIKE COUNTIES ALONG THE MC KEE CREEK STREAM BASIN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

FLOODING IS OCCURRING OR IS IMMINENT. MOST FLOOD RELATED DEATHS OCCUR
IN VEHICLES. DO NOT ATTEMPT TO CROSS WATER COVERED BRIDGES...DIPS...
OR LOW WATER CROSSINGS. NEVER TRY TO CROSS A FLOWING STREAM... EVEN A
SMALL ONE...ON FOOT OR IN A VEHICLE.

TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN ST
LOUIS.

&&

LAT...LON 3987 9058 3983 9056 3979 9059 3975 9061
      3972 9064 3969 9064 3964 9061 3964 9093
      3972 9093 3976 9093 3976 9092 3991 9092
      3991 9054

$$

CARNEY

1 follow-up statement

007 
WGUS73 KLSX 140239
FFSLSX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
939 PM CDT MON JUN 13 2011

ILC009-149-140430-
/O.CON.KLSX.FF.W.0044.000000T0000Z-110614T0430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PIKE IL-BROWN IL-
939 PM CDT MON JUN 13 2011

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR SOUTHERN BROWN AND
NORTHEASTERN PIKE COUNTIES IN WEST CENTRAL ILLINOIS UNTIL 1130 PM
CDT...

AT 933 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THAT VERY HEAVY RAINFALL OCCURRED OVER THE NORTHERN REACHES OF MC 
KEE CREEK EARLIER IN THE EVENING.  RUNOFF FROM THIS HEAVY RAIN WILL 
BE MOVING DOWN MC KEE CREEK THROUGH THE NIGHT.  ADDITIONALLY...RADAR 
WAS INDICATING MORE HEAVY THUNDERSTORMS MOVING INTO WEST CENTRAL 
ILLINOIS.  ADDITIONAL RUNOFF CAUSING HIGHER WATER LEVELS IS LIKELY 
TO OCCUR.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...CHAMBERSBURG
AND RURAL PORTIONS OF SOUTHERN BROWN AND PIKE COUNTIES.  ANY 
RESIDENTS ALONG MC KEE CREEK ARE URGED TO MONITOR WATER LEVELS 
CLOSELY AND TAKE IMMEDIATE ACTION IF WATER RISES OCCUR.

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.

MOST FLOOD RELATED DEATHS OCCUR IN VEHICLES. DO NOT ATTEMPT TO CROSS
BRIDGES...DIPS...OR OTHER LOW SPOTS IF WATER COVERS THE ROADWAY.
NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT OR
IN A VEHICLE.

REPORT FLOODING TO THE NEAREST LAW ENFORCEMENT AGENCY SO THAT THEY
MAY TAKE APPROPRIATE ACTION TO CLOSE FLOODED ROADWAYS. THEY WILL
RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN ST LOUIS.

&&

LAT...LON 3987 9058 3983 9056 3979 9059 3975 9061
      3972 9064 3969 9064 3964 9061 3964 9093
      3972 9093 3976 9093 3976 9092 3991 9092
      3991 9054

$$

CARNEY

The office that day

Everything else NWS St. Louis, MO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 13, 2:57 PM CDT	Severe Thunderstorm Warning	LSX	Adams	48 min
Jun 13, 3:37 PM CDT	Severe Thunderstorm Warning	LSX	Adams, Brown, Pike	38 min
Jun 13, 4:02 PM CDT	Flash Flood Watch	LSX	Adams, Bond, Brown, Calhoun, Clinton, Fayette and 11 more	39 hr
Jun 13, 4:09 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Greene, Pike	51 min
Jun 13, 4:18 PM CDT	Flash Flood Warning	LSX	Adams	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.