Alert archive / Illinois / Flash Flood Warnings in 2011
Flash Flood Warning 79, NWS St. Louis, MO
NWS St. Louis, MO issued this flash flood warning at Jul 24, 2011, 3:09 PM CDT for Randolph County, Illinois; Sainte Genevieve County, Missouri. It was in force for 5 hr. 1 report 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
- Jul 24, 2011, 3:09 PM CDT (20:09 UTC)
- Expired
- Jul 24, 2011, 8:14 PM CDT
- In force
- 5 hr
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Flood severity
- None
The radar
The St Louis radar (KLSX), 103 km from the middle of the area, began a volume at 20:12 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 |
|---|---|---|---|
| Jul 24, 6:53 PM CDT | HEAVY RAIN 4.4 | Bloomsdale, MO |
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 12:00Z, 8.2 hours before the alert went out and 276 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
- 3589 J/kg
- Mixed-layer CIN
- -60 J/kg
- Mixed-layer LCL
- 977 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- 25 m²/s²
- 0-3 km storm-relative helicity
- 12 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
The text
As transmitted, in the capitals the NWS used until 2016.
562
WGUS53 KLSX 242009
FFWLSX
ILC157-MOC186-250200-
/O.NEW.KLSX.FF.W.0079.110724T2009Z-110725T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
309 PM CDT SUN JUL 24 2011
THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A
* FLASH FLOOD WARNING FOR...
RANDOLPH COUNTY IN SOUTHWEST ILLINOIS...
STE. GENEVIEVE COUNTY IN SOUTHEAST MISSOURI...
* UNTIL 900 PM CDT
* AT 308 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE
WARNED AREA. RADAR ESTIMATES THAT ONE AND A HALF TO THREE INCHES
OF RAINFALL HAVE FALLEN OVER THE PAST ONE TO TWO HOURS.
* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
CHESTER...RED BUD...SPARTA...STE. GENEVIEVE...BALDWIN...
BLOOMSDALE...BREMEN...COFFMAN...COULTERVILLE...EVANSVILLE...
PERCY...ROCKY RIDGE...ST. MARY...STEELEVILLE...TILDEN...WEINGARTEN
AND WOMAC.
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.
IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE
POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO TRAVEL ACROSS
FLOODED ROADS. FIND ALTERNATE ROUTES. IT ONLY TAKES A FEW INCHES OF
SWIFTLY FLOWING WATER TO CARRY VEHICLES AWAY.
TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN ST
LOUIS.
&&
LAT...LON 3788 9046 3798 9032 3804 9042 3813 9025
3809 9021 3813 9004 3822 9004 3822 8959
3796 8959 3781 8968 3785 8974 3785 8979
3788 8980 3790 8985 3787 8990 3787 8994
3782 9000 3767 9011 3770 9016 3767 9020
$$
TES2 follow-up statements
442
WGUS73 KLSX 242324
FFSLSX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
624 PM CDT SUN JUL 24 2011
ILC157-MOC186-250200-
/O.CON.KLSX.FF.W.0079.000000T0000Z-110725T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
RANDOLPH IL-STE. GENEVIEVE MO-
624 PM CDT SUN JUL 24 2011
...FLASH FLOOD WARNING REMAINS IN EFFECT FOR NORTHERN STE. GENEVIEVE
AND SOUTHWESTERN RANDOLPH COUNTIES UNTIL 900 PM CDT...
AT 614 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THAT THE THUNDERSTORMS THAT HAD PRODUCED 2 TO 4 INCHES OF RAINFALL
OVER PARTS OF THE WARNING AREA EARLY THIS AFTERNOON HAVE ENDED. NO
REPORTS OF FLOODING HAVE BEEN RECEIVED RECENTLY BY LOCAL LAW
ENFORCEMENT...HOWEVER SOME WATER MAY STILL BE ON RURAL ROADS NEXT TO
FLOODED CREEKS AND STREAMS.
SOME LOCATIONS NEAR BLOOMSDALE...EVANSVILLE...ROCKY RIDGE AND STE.
GENEVIEVE MAY STILL BE EXPERIENCING FLOODING.
THIS INCLUDES THE FOLLOWING STREAMS AND DRAINAGES...
CREEK...ESTABLISHMENT CREEK...DU CLOS, FOURCHE A...GOOSE
CREEK...NINEMILE CREEK AND BUTTER CREEK.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.
IN HILLY TERRAIN...THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH
ARE POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO TRAVEL
ACROSS FLOODED ROADS. FIND ALTERNATE ROUTES. IT ONLY TAKES A FEW
INCHES OF SWIFTLY FLOWING WATER TO CARRY VEHICLES AWAY.
REPORT FLOODING TO THE NEAREST LAW ENFORCEMENT AGENCY SO THAT THEY
MAY TAKE APPROPRIATE ACTION TO CLOSE FLOODED ROADWAYS. THEY WILL
RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN ST LOUIS.
&&
LAT...LON 3801 9036 3809 9021 3813 9004 3805 8976
3790 8985 3787 8990 3787 8994 3778 9003
$$
BRITT722
WGUS73 KLSX 250114
FFSLSX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
814 PM CDT SUN JUL 24 2011
ILC157-MOC186-250129-
/O.CAN.KLSX.FF.W.0079.000000T0000Z-110725T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
RANDOLPH IL-STE. GENEVIEVE MO-
814 PM CDT SUN JUL 24 2011
...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR NORTHERN STE.
GENEVIEVE AND SOUTHWESTERN RANDOLPH 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 3801 9036 3809 9021 3813 9004 3805 8976
3790 8985 3787 8990 3787 8994 3778 9003
$$
BRITTThe office that day
Everything else NWS St. Louis, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 24, 12:21 PM CDT | Severe Thunderstorm Warning | LSX | Fayette, Montgomery | 24 min |
| Jul 24, 1:50 PM CDT | Severe Thunderstorm Warning | LSX | Marion | 25 min |
| Jul 24, 2:47 PM CDT | Severe Thunderstorm Warning | LSX | Randolph | 43 min |
| Jul 24, 4:00 PM CDT | Excessive Heat Watch | LSX | Adams, Bond, Brown, Clinton, Fayette, Greene and 5 more | 24 hr |
| Jul 24, 3:44 PM CDT | Severe Thunderstorm Warning | LSX | Sainte Genevieve, Saint Francois | 46 min |
Nearby
Flash Flood Warnings in Illinois, 2011Flash Flood Warnings in Missouri, 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.