Alert archive / Missouri / Flash Flood Warnings in 2003

Flash Flood Warning 35, NWS St. Louis, MO

July 18, 2003Moniteau County, Missouri

NWS St. Louis, MO issued this flash flood warning at Jul 18, 2003, 10:09 PM CDT for Moniteau County, Missouri. It was in force for 4 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: Jul 18, 2003, 10:09 PM CDT (03:09 UTC)
Expired: Jul 19, 2003, 2:15 AM CDT
In force: 4 hr
Issued by: NWS St. Louis, MO
Area: Counties, with a storm outline in the text

County Moniteau County, MO

The radar

The Pleasant Hill radar (KEAX), 147 km from the middle of the area, began a volume at 03:08 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 00:00Z, 3.2 hours before the alert went out and 225 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: 2598 J/kg
Mixed-layer CIN: -57 J/kg
Mixed-layer LCL: 1646 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 106 m²/s²
0-3 km storm-relative helicity: 168 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 13.9

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KLSX 190314
FFWLSX
MOC135-190715-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1009 PM CDT FRI JUL 18 2003

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

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

* UNTIL 215 AM CDT

* AT 1009 PM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED           
  THUNDERSTORMS PRODUCING VERY HEAVY RAIN IN THE SOUTHWESTERN        
  PORTION OF MONITEAU COUNTY...BETWEEN TIPTON AND HIGH POINT.

* FLASH FLOODING CAN BE EXPECTED ACROSS THE AREA...AND WILL BE       
  AFFECTING THE SOUTHWESTERN PORTIONS OF THE COUNTY...IN AND AROUND  
  TIPTON...LATHAM...AND HIGH POINT.  THE WATER WILL LIKELY DRAIN     
  NORTHWARD TOWARDS THE MISSOURI RIVER...SO PEOPLE IN THE REMAINDER  
  OF MONITEAU COUNTY SHOULD ALSO BE ON THE LOOKOUT FOR FLOODING.


MOST DEATHS IN FLASH FLOODING OCCUR IN AUTOMOBILES DO NOT ATTEMPT TO
CROSS BRIDGES...DIPS...OR LOW WATER CROSSINGS IF WATER COVERS THE
ROADWAY. DO NOT DRIVE AROUND BARRICADES IF YOUR VEHICLE STALLS...
ABANDON IT IMMEDIATELY AND SEEK HIGHER GROUND.

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

LAT...LON 3882 9240 3870 9240 3844 9249 3842 9262
          3860 9285 3869 9285 3870 9263 3889 9252

$$

CARNEY/TRUETT

1 follow-up statement

000 
WGUS73 KLSX 190430
FFSLSX
MOC135-190715-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1128 PM CDT FRI JUL 18 2003

...A FLASH FLOOD WARNING REMAINS IN EFFECT FOR MONITEAU COUNTY UNTIL
215 AM CDT...

AT 1125 PM CDT...WEATHER SERVICE DOPPLER RADAR SHOWED SEVERAL 
CLUSTERS OF THUNDERSTORMS PRODUCING VERY HEAVY RAIN ACROSS SOUTHERN 
MONITEAU COUNTY...ALONG AND SOUTH OF A TIPTON TO HIGH POINT LINE.  

SINCE AROUND 800 PM THUNDERSTORMS HAVE BEEN MOVING NEARLY 
CONTINUOUSLY OVER THE SAME LOCATIONS ACROSS SOUTHERN MONITEAU 
COUNTY.  THIS HAS RESULTED IN HEAVY RAINFALL ACCUMULATIONS WITH 
DOPPLER RADAR ESTIMATES OF 4 TO 7 INCHES OF RAIN ALONG AND SOUTH OF 
A LINE FROM TIPTON TO LATHAM TO HIGH POINT TO ENON.

SOME WATERCOURSES WHICH ARE LIKELY EXPERIENCING FLOODING 
INCLUDE...SMITH CREEK...MEDLEN CREEK...BURRIS FORK...AND STRAIGHT 
FORK.  ADDITIONALLY...COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF 
CREEKS AND STREAMS AND OTHER LOW LYING AREAS ARE SUBJECT TO FLASH 
FLOODING.

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

$$
FG

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 18, 7:08 PM CDT	Severe Thunderstorm Warning	LSX	Sainte Genevieve	52 min
Jul 18, 7:16 PM CDT	Severe Thunderstorm Warning	LSX	Madison	29 min
Jul 18, 7:42 PM CDT	Severe Thunderstorm Warning	LSX	Saint Francois	33 min
Jul 18, 8:23 PM CDT	Severe Thunderstorm Warning	LSX	Saint Francois	52 min
Jul 18, 8:58 PM CDT	Severe Thunderstorm Warning	LSX	Madison	47 min
Jul 18, 9:04 PM CDT	Severe Thunderstorm Warning	LSX	Washington	41 min
Jul 18, 10:19 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Washington	41 min
Jul 18, 10:23 PM CDT	Severe Thunderstorm Warning	LSX	Moniteau	37 min
Jul 18, 10:59 PM CDT	Severe Thunderstorm Warning	LSX	Reynolds	46 min
Jul 18, 11:35 PM CDT	Severe Thunderstorm Warning	LSX	Moniteau	40 min

Nearby

Flash Flood Warnings in Missouri, 2003 Every flash flood warning in 2003

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.