Flash Flood Warning 21, NWS St. Louis, MO

Issued

May 20, 2011, 1:18 PM CDT (18:18 UTC)

Expired

May 20, 2011, 5:00 PM CDT

In force

4 hr

Issued by

NWS St. Louis, MO

Area

Storm-based polygon

Flood severity

None

County Moniteau County, MO

The Pleasant Hill radar (KEAX), 145 km from the middle of the area, began a volume at 18:19 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.

961 
WGUS53 KLSX 201818
FFWLSX
MOC135-202200-
/O.NEW.KLSX.FF.W.0021.110520T1818Z-110520T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
118 PM CDT FRI MAY 20 2011

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHERN MONITEAU COUNTY IN CENTRAL MISSOURI...

* UNTIL 500 PM CDT

* AT 114 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE  
  WARNED AREA. DOPPLER RADAR ESTIMATED THAT RAINFALL UP TO 1.5 
  INCHES HAS FALLEN OVER SOUTHERN MONITEAU COUNTY AND...AND 
  ADDITIONAL HEAVY RAINFALL WILL AFFECT THE AREA FOR THE NEXT FEW 
  HOURS.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  CALIFORNIA...CLARKSBURG...HIGH POINT AND MCGIRK.

THE COLBURN BRANCH...SOUTH MOREAU CREEK...AND BURRIS FORK STREAMS 
HAVE BEEN ESPECIALLY HARD HIT.  PEOPLE IN THE VICINITY OF THESE 
STREAMS SHOULD BE ON THE LOOKOUT FOR IMMINENT FLASH FLOODING.

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.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

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 3868 9267 3868 9263 3872 9260 3872 9240
      3843 9250 3843 9262 3856 9279

$$

CARNEY

213 
WGUS73 KLSX 202023
FFSLSX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
323 PM CDT FRI MAY 20 2011

MOC135-202200-
/O.CON.KLSX.FF.W.0021.000000T0000Z-110520T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MONITEAU MO-
323 PM CDT FRI MAY 20 2011

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR SOUTHERN MONITEAU COUNTY
UNTIL 500 PM CDT...

AT 313 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA. 
DOPPLER RADAR ESTIMATED THAT 2 INCHES OF RAIN HAS FALLEN OVER PARTS 
OF THE WARNING AREA...WITH LOCALLY HIGHER AMOUNTS.  WHILE THE 
HEAVIEST RAIN HAS ENDED...LIGHT TO MODERATE RAIN WILL CONTINUE WITH 
1/4 TO 1/2 INCH PER HOUR RAINFALL RATES.  THIS CONTINUING RAINFALL 
WILL KEEP STREAM LEVELS HIGH THROUGH THE REMAINDER OF THE AFTERNOON 
AND POSSIBLY INTO THE EARLY EVENING.

RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
CALIFORNIA...CLARKSBURG...HIGH POINT AND MCGIRK.

THE COLBURN BRANCH...AND BURRIS FORKS OF THE MOREAU CREEK...AS WELL 
AS THE MAIN STEMS OF THE NORTH AND SOUTH MOREAU CREEK HAVE BEEN 
ESPECIALLY HARD HIT FROM THIS AFTERNOONS HEAVY RAIN.  PEOPLE SOUTH 
OF THE CITY OF CALIFORNIA...ESPECIALLY AROUND HIGH POINT SHOULD BE 
ESPECIALLY CAUTIOUS THIS AFTERNOON.  MISSOURI HIGHWAY PATROL REPORTS 
THAT LOW WATER CROSSINGS WILL LIKELY BE INUNDATED AND IMPASSIBLE IN 
THESE AREAS.  THIS WILL BE ESPECIALLY DANGEROUS AFTER DARK WHEN IT 
WILL BE MORE DIFFICULT TO JUDGE DRIVING CONDITIONS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WARNING MEANS THAT FLASH 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.

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.

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 3868 9267 3868 9263 3872 9260 3872 9240
      3843 9250 3843 9262 3856 9279

$$

CARNEY

Flash Flood Warnings in Missouri, 2011Every flash flood warning in 2011

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.