Alert archive / Missouri / Flash Flood Warnings in 2009

Flash Flood Warning 86, NWS St. Louis, MO

October 29, 20095 counties in Missouri

NWS St. Louis, MO issued this flash flood warning at Oct 29, 2009, 4:48 PM CDT for 5 counties in Missouri. It was in force for 5 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Oct 29, 2009, 4:48 PM CDT (21:48 UTC)
Expired
Oct 29, 2009, 10:00 PM CDT
In force
5 hr
Issued by
NWS St. Louis, MO
Area
Storm-based polygon
Flood severity
None

Counties Audrain County, MO, Boone County, MO, Callaway County, MO, Cole County, MO, Moniteau County, MO

The radar

The St Louis radar (KLSX), 136 km from the middle of the area, began a volume at 21:51 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.

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 9.8 hours before the alert went out and 249 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-pSkew-T log-p diagram, Springfield, MO at 12:00Z on 2009-10-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Springfield, MO at 12:00Z on 2009-10-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 579 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
556 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
579 m²/s²
0-3 km storm-relative helicity
652 m²/s²
Significant tornado parameter
0.0
Supercell composite
4.9

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WGUS53 KLSX 292148
FFWLSX
MOC007-019-027-051-135-300300-
/O.NEW.KLSX.FF.W.0086.091029T2148Z-091030T0300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
448 PM CDT THU OCT 29 2009

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  AUDRAIN COUNTY IN CENTRAL MISSOURI...
  BOONE COUNTY IN CENTRAL MISSOURI...
  CALLAWAY COUNTY IN CENTRAL MISSOURI...
  COLE COUNTY IN CENTRAL MISSOURI...
  MONITEAU COUNTY IN CENTRAL MISSOURI...

* UNTIL 1000 PM CDT

* AT 443 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THUNDERSTORMS WITH HEAVY RAIN MOVING OUT OF THE OZARKS AND INTO
  CENTRAL MISSOURI.  THE RAINS OF EARLIER TODAY HAVE LEFT MANY CREEKS
  AND STREAMS AT BANKFULL...AND THIS NEXT ROUND OF MODERATE TO 
  OCCASIONALLY HEAVY RAIN WILL MAKE FLASH FLOODING A VERY REAL
  POSSIBILITY.  AREAS ALONG AND EAST OF A JEFFERSON CITY...MEXICO
  LINE WILL BE OF SPECIAL CONCERN...AS THESE AREAS EXPERIENCED THE
  HEAVIEST RAINS EARLIER TODAY. 

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  ASHLAND...CALIFORNIA...CENTRALIA...COLUMBIA...FULTON...HOLTS
  SUMMIT...JEFFERSON CITY...MEXICO...TIPTON...VANDALIA...AUXVASSE...
  BRAZITO...CENTERTOWN...CLARKSBURG...EASLEY...FARBER...HALLSVILLE...
  HICKORY HILL...HIGH POINT...JAMESTOWN...LADDONIA...LAKE MYKEE...
  MARTINSBURG...MCGIRK...MIDWAY...MURRY...NEW BLOOMFIELD...
  ROCHEPORT...RUSSELLVILLE AND SHAMROCK.

  ADDITIONAL RAINS OF AROUND AN INCH WILL BE POSSIBLE EARLY THIS
  EVENING...WITH EVEN MORE RAIN EXPECTED POSSIBLE DURING THE
  OVERNIGHT HOURS.   

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 AUTOMOBILES. 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 3869 9284 3870 9261 3892 9250 3900 9257
      3925 9243 3925 9232 3935 9231 3932 9144
      3915 9142 3915 9164 3871 9165 3867 9186
      3847 9204 3847 9217 3839 9212 3833 9220
      3834 9241 3842 9241 3843 9263 3860 9284

$$

TRUETT

The office that day

Everything else NWS St. Louis, MO issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Oct 29, 10:07 AM CDTRiver Flood WarningLSXReynolds71 hr
Oct 29, 3:19 PM CDTFlash Flood WarningLSXKnox, Lewis, Marion, Monroe, Shelby6 hr
Oct 29, 3:58 PM CDTFlash Flood WarningLSXCrawford, Franklin, Gasconade, Osage, Washington6 hr
Oct 29, 4:19 PM CDTFlash Flood WarningLSXLincoln, Montgomery, Pike, Ralls, Saint Charles, Saint Louis and 1 more6 hr
Oct 29, 4:59 PM CDTRiver Flood WarningLSXLincoln53 hr
Oct 29, 6:14 PM CDTFlash Flood WarningLSXIron, Reynolds4 hr

Nearby

Flash Flood Warnings in Missouri, 2009Every flash flood warning in 2009

Sources

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.