Flash Flood Warning 22, NWS St. Louis, MO

Issued

May 20, 2011, 4:56 PM CDT (21:56 UTC)

Expired

May 20, 2011, 10:00 PM CDT

In force

5 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 22:14 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.

664 
WGUS53 KLSX 202156
FFWLSX
MOC135-210300-
/O.NEW.KLSX.FF.W.0022.110520T2156Z-110521T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
456 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 1000 PM CDT

* AT 448 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE      
  WARNED AREA. DOPPLER RADAR ESTIMATED THAT OVER 2 INCHES OF RAIN    
  HAS ALREADY FALLEN ACROSS PARTS OF THE WARNED AREA. LIGHT TO       
  MODERATE RAIN WILL CONTINUE FOR THE NEXT SEVERAL HOURS...KEEPING   
  STREAM LEVELS HIGH THROUGH THE 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 MAIN STEMS OF THE NORTH AND SOUTH MOREAU CREEK IN ADDITION TO 
THE COLBURN AND BURRIS FORKS OF THE MOREAU CREEK HAVE BEEN 
ESPECIALLY HARD HIT BY HEAVY RAIN THAT FELL THIS AFTERNOON. PEOPLE 
SOUTH OF THE CITY OF CALIFORNIA...ESPECIALLY AROUND HIGH 
POINT...SHOULD BE CAUTIOUS WHEN TRAVELING THIS EVENING. MISSOURI 
HIGHWAY PATROL REPORTS THAT LOW WATER CROSSINGS WILL LIKELY BE 
INUNDATED AND IMPASSABLE IN THESE AREAS. THIS WILL BE ESPECIALLY 
DANGEROUS AFTER DARK WHEN IT IS HARDER TO JUDGE ROAD CONDITIONS. 

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.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. DO
NOT ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND TO
ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN
WATER BEGINS RISING.

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.

&&

LAT...LON 3868 9267 3868 9263 3872 9260 3872 9240
      3843 9250 3843 9262 3856 9279

$$

KANOFSKY

942 
WGUS73 KLSX 210132
FFSLSX

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

MOC135-210300-
/O.CON.KLSX.FF.W.0022.000000T0000Z-110521T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MONITEAU MO-
832 PM CDT FRI MAY 20 2011

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR SOUTHERN MONITEAU COUNTY
UNTIL 1000 PM CDT...

AT 825 PM CDT...REGIONAL RADARS SHOWED THAT THE HEAVY RAIN THAT 
PROMPTED THE WARNING HAD ENDED. RADAR ESTIMATES AND OBSERVATIONS 
INDICATE THAT OVER 2 INCHES OF RAIN FELL TODAY ACROSS SOUTHERN 
PORTIONS OF MONITEAU COUNTY INCLUDING THE HIGH POINT AREA. THIS HAS 
LIKELY PRODUCED SOME FLOODING OF SMALL CREEKS AND STREAMS...SUCH AS 
MEDLEN CREEK AND MORGAN BRANCH.  

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...HIGH POINT 
AND ENON.

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.

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.

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.

&&

LAT...LON 3868 9267 3868 9263 3872 9260 3872 9240
      3843 9250 3843 9262 3856 9279

$$

GLASS

588 
WGUS73 KLSX 210257
FFSLSX

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

MOC135-210312-
/O.EXP.KLSX.FF.W.0022.000000T0000Z-110521T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MONITEAU MO-
957 PM CDT FRI MAY 20 2011

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR SOUTHERN MONITEAU
COUNTY WILL BE ALLOWED TO EXPIRE AT 1000 PM CDT...

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

$$

GLASS

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.