Alert archive / Illinois / Flash Flood Warnings in 2011

Flash Flood Warning 43, NWS St. Louis, MO

June 13, 2011Adams County, Illinois

NWS St. Louis, MO issued this flash flood warning at Jun 13, 2011, 4:18 PM CDT for Adams County, Illinois. It was in force for 6 hr. 2 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: Jun 13, 2011, 4:18 PM CDT (21:18 UTC)
Expired: Jun 13, 2011, 10:30 PM CDT
In force: 6 hr
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Flood severity: None

County Adams County, IL

The radar

The St Louis radar (KLSX), 152 km from the middle of the area, began a volume at 21:18 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
Jun 13, 4:20 PM CDT	HEAVY RAIN 1.8	Camp Point, IL
Jun 13, 7:43 PM CDT	FLASH FLOOD	2 Nnw Liberty, IL	WATER OF UNKNOWN DEPTH RUNNING OVER EAST 1900 STREET JUST SOUTH OF HWY 104.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 9.3 hours before the alert went out and 195 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: 1758 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: 144 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.

103 
WGUS53 KLSX 132118
FFWLSX
ILC001-140330-
/O.NEW.KLSX.FF.W.0043.110613T2118Z-110614T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  ADAMS COUNTY IN WEST CENTRAL ILLINOIS...

* UNTIL 1030 PM CDT

* AT 417 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE
  WARNED AREA. RADAR ESTIMATED THAT RAINFALL IN EXCESS OF 3 INCHES
  HAD OCCURRED IN THE LAST 60 TO 90 MINUTES...AND ADDITIONAL HEAVY
  RAIN WAS CONTINUING TO FALL.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  QUINCY...BEVERLY...CAMP POINT...CLAYTON...FALL CREEK...GOLDEN...
  MENDON AND PAYSON.

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.

&&

LAT...LON 4019 9092 3976 9092 3976 9136 3980 9137
      3985 9144 3989 9145 3992 9142 3993 9142
      3995 9144 4004 9150 4019 9151 4020 9129

$$

CARNEY

1 follow-up statement

630 
WGUS73 KLSX 140141
FFSLSX

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

ILC001-140330-
/O.CON.KLSX.FF.W.0043.000000T0000Z-110614T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ADAMS IL-
841 PM CDT MON JUN 13 2011

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR ADAMS COUNTY UNTIL 1030
PM CDT...

AT 837 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THUNDERSTORMS PRODUCING VERY HEAVY RAIN BUILDING SOUTHEAST FROM IOWA 
INTO THE SAME REGION WHICH RECEIVED HEAVY RAIN THIS AFTERNOON.  DUE 
TO HEAVY RAINS EARLIER TODAY...ANY ADDITIONAL RAINFALL WILL 
IMMEDIATELY RUN OFF INTO AREA STREAMS AND RIVERS.  THE HEADWATERS OF 
MC KEE CREEK WERE ESPECIALLY HARD HIT EARLIER TODAY.  CONTINUED 
FLOODING IS EXPECTED ALONG MC KEE CREEK TONIGHT.

RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
QUINCY...BEVERLY...CAMP POINT...CLAYTON...FALL CREEK...GOLDEN...
MENDON AND PAYSON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLOODING OF SMALL CREEKS
AND STREAMS...COUNTRY ROADS...NORMALLY DRY WASHES... AS WELL AS
FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS.

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.

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 4019 9092 3976 9092 3976 9136 3980 9137
      3985 9144 3989 9145 3992 9142 3993 9142
      3995 9144 4004 9150 4019 9151 4020 9129

$$

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, 5:41 PM CDT	Flash Flood Warning	LSX	Brown, Pike	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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.