Alert archive / Missouri / Flash Flood Warnings in 2009

Flash Flood Warning 49, NWS St. Louis, MO

June 17, 2009Callaway County, Missouri

NWS St. Louis, MO issued this flash flood warning at Jun 17, 2009, 8:21 PM CDT for Callaway County, Missouri. It was in force for 4 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: Jun 17, 2009, 8:21 PM CDT (01:21 UTC)
Expired: Jun 18, 2009, 12:00 AM CDT
In force: 4 hr
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Flood severity: None

County Callaway County, MO

The radar

The St Louis radar (KLSX), 117 km from the middle of the area, began a volume at 01:23 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 17, 10:15 PM CDT	FLASH FLOOD	6 Wnw Kingdom City, MO	WATER OVER THE INTERSECTION OF COUNTY ROADS 240 AND 247. ALSO...WATER OVER COUNTY ROAD 263 JUST NORTH OF COUNTY ROAD 240.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 1.4 hours before the alert went out and 257 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 2393 J/kg
Mixed-layer CIN: -119 J/kg
Mixed-layer LCL: 1588 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 26 m²/s²
0-3 km storm-relative helicity: 86 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 3.9

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KLSX 180121
FFWLSX
MOC027-180500-
/O.NEW.KLSX.FF.W.0049.090618T0121Z-090618T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
821 PM CDT WED JUN 17 2009

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CALLAWAY COUNTY IN CENTRAL MISSOURI

* UNTIL MIDNIGHT CDT

* AT 817 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
  SLOW MOVING THUNDERSTORMS HAVE PRODUCED HEAVY RAIN OVER PARTS
  OF CALLAWAY COUNTY.  RAINFALLS OF 2 TO 3 INCHES HAVE ALREADY
  OCCURRED...PRIMARILY TO THE NORTHWEST OF FULTON...AND ADDITIONAL
  STORMS WILL BE PRODUCING POCKETS OF HEAVY RAIN OVER THE NEXT FEW
  HOURS.
    
* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  FULTON...HOLTS SUMMIT...AUXVASSE...LAKE MYKEE...NEW BLOOMFIELD...
  SHAMROCK AND WILLIAMSBURG.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

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 3881 9214 3890 9217 3897 9215 3906 9214
      3906 9165 3871 9165 3871 9174 3868 9180
      3868 9185 3860 9195 3856 9203 3856 9212
      3858 9217 3861 9221 3864 9222 3868 9220
      3870 9222

$$

TRUETT

1 follow-up statement

000 
WGUS73 KLSX 180346
FFSLSX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1046 PM CDT WED JUN 17 2009

MOC027-180500-
/O.CON.KLSX.FF.W.0049.000000T0000Z-090618T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
CALLAWAY MO-
1046 PM CDT WED JUN 17 2009

...FLASH FLOOD WARNING REMAINS IN EFFECT FOR CALLAWAY COUNTY UNTIL
MIDNIGHT CDT...

AT 1041 PM CDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED THAT 
FLOODING WAS OCCURRING OVER PARTS OF NORTHWEST CALLAWAY COUNTY.
WATER WAS COVERING THE INTERSECTION OF COUNTY ROADS 240 AND 
247...ABOUT 6 MILES WEST NORTHWEST OF KINGDOM CITY.   IN 
ADDITION....WATER WAS COVERING COUNTY ROAD 263...JUST NORTH OF 
COUNTY ROAD 40.    

THESE FLOOD WATERS SHOULD RECEDE OVER THE NEXT HOUR OR SO AS THE 
STANDING WATER RUNS INTO LARGER CREEKS AND STREAMS ACROSS THE AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

MOST FLOOD RELATED DEATHS OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO
CROSS BRIDGES...DIPS...OR OTHER LOW SPOTS IF WATER COVERS THE
ROADWAY. NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON
FOOT OR IN A VEHICLE.

&&

LAT...LON 3881 9214 3890 9217 3897 9215 3906 9214
      3906 9165 3871 9165 3871 9174 3868 9180
      3868 9185 3860 9195 3856 9203 3856 9212
      3858 9217 3861 9221 3864 9222 3868 9220
      3870 9222

$$

TRUETT

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 17, 7:29 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Boone, Callaway, Montgomery	46 min
Jun 17, 7:39 PM CDT	Tornado Warning	LSX	Callaway	37 min
Jun 17, 7:41 PM CDT	Flash Flood Warning	LSX	Boone	4 hr
Jun 17, 8:14 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Gasconade, Montgomery, Osage	46 min
Jun 17, 8:45 PM CDT	Severe Thunderstorm Warning	LSX	Boone, Moniteau	17 min
Jun 17, 8:59 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade, Osage	46 min
Jun 17, 9:44 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Gasconade	46 min
Jun 18, 12:01 AM CDT	Flash Flood Warning	LSX	Callaway	8 hr
Jun 18, 2:29 PM CDT	River Flood Warning	LSX	Franklin	20 hr

Nearby

Flash Flood Warnings in Missouri, 2009 Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.