Alert archive / Illinois / Flash Flood Warnings in 2011
Flash Flood Warning 60, NWS St. Louis, MO
NWS St. Louis, MO issued this flash flood warning at Jun 21, 2011, 10:12 PM CDT for Randolph County, Saint Clair County, Washington 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 21, 2011, 10:12 PM CDT (03:12 UTC)
- Expired
- Jun 22, 2011, 4:00 AM CDT
- In force
- 6 hr
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Flood severity
- None
Counties Randolph County, IL, Saint Clair County, IL, Washington County, IL
The radar
The St Louis radar (KLSX), 114 km from the middle of the area, began a volume at 03:13 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 21, 10:12 PM CDT | FLOOD | 2 Ssw Coulterville, IL | WATER UP TO A FOOT AND A HALF DEEP COVERING PART OF ROUTE 153 |
| Jun 21, 10:22 PM CDT | FLOOD | Addieville, IL | WATER 3 TO 6 INCHES DEEP ACROSS PORTIONS OF ROUTE 160 AND ROUTE 15 BETWEEN ADDIEVILLE AND NASHVILLE. ROADS ARE PASSABLE. |
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, 3.2 hours before the alert went out and 226 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.
- Mixed-layer CAPE
- 3122 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 829 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 147 m²/s²
- 0-3 km storm-relative helicity
- 207 m²/s²
- Significant tornado parameter
- 3.5
- Supercell composite
- 15.3
The text
As transmitted, in the capitals the NWS used until 2016.
435
WGUS53 KLSX 220312
FFWLSX
ILC157-163-189-220900-
/O.NEW.KLSX.FF.W.0060.110622T0312Z-110622T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1012 PM CDT TUE JUN 21 2011
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* FLASH FLOOD WARNING FOR...
RANDOLPH COUNTY IN SOUTHWEST ILLINOIS...
SOUTHEASTERN ST. CLAIR COUNTY IN SOUTHWEST ILLINOIS...
WASHINGTON COUNTY IN SOUTH CENTRAL ILLINOIS...
* UNTIL 400 AM CDT
* AT 1009 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE
WARNED AREA. DOPPLER RADAR ESTIMATES THAT 2 TO 3 INCHES OF RAIN
HAS FALLEN ALONG A LINE FROM NEAR EVANSVILLE TO COULTERVILLE TO
OAKDALE SINCE 800 PM. THE COUNTY SHERIFF REPORTS THAT A PORTION OF
ROUTE 153 SOUTH OF COULTERVILLE HAD A FOOT AND A HALF OF WATER ON
THE ROAD. ANOTHER INCH OF RAIN IS POSSIBLE ACROSS THE AREA THROUGH
MIDNIGHT.
* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
NASHVILLE...SPARTA...ASHLEY...BALDWIN...BREMEN...COULTERVILLE...
EVANSVILLE...IRVINGTON...LIVELY GROVE...MARISSA...NEW ATHENS...
OKAWVILLE...PERCY...STEELEVILLE...TILDEN AND WAMAC.
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.
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.
&&
LAT...LON 3822 8959 3795 8959 3797 8999 3838 8987
3851 8918 3850 8914 3821 8914
$$
GLASS1 follow-up statement
342
WGUS73 KLSX 220857
FFSLSX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
357 AM CDT WED JUN 22 2011
ILC157-163-189-220910-
/O.EXP.KLSX.FF.W.0060.000000T0000Z-110622T0900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
RANDOLPH IL-ST. CLAIR IL-WASHINGTON IL-
357 AM CDT WED JUN 22 2011
...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR WASHINGTON...
SOUTHEASTERN ST. CLAIR AND RANDOLPH COUNTIES WILL BE ALLOWED TO
EXPIRE AT 400 AM CDT...
EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA...AND
STREAMS AND CREEKS IN THE WARNED AREA HAVE RECEDED OR WERE BEGINNING
TO RECEDE.
HOWEVER...EARLY MORNING MOTORISTS SHOULD REMAIN ALERT FOR STANDING
WATER ON ROADWAYS...ESPECIALLY IN LOW LYING AND POORLY DRAINED
LOCATIONS.
LAT...LON 3822 8959 3795 8959 3797 8999 3838 8987
3851 8918 3850 8914 3821 8914
$$
TRUETTThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 21, 7:28 PM CDT | Severe Thunderstorm Warning | LSX | Monroe, Randolph, Saint Clair | 47 min |
| Jun 21, 8:43 PM CDT | Severe Thunderstorm Warning | LSX | Randolph, Saint Clair, Washington | 47 min |
| Jun 21, 9:53 PM CDT | Areal Flood Advisory | LSX | Randolph, Saint Clair, Washington | 3 hr |
Nearby
Flash Flood Warnings in Illinois, 2011Every 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.