Alert archive / Missouri / Flash Flood Warnings in 2003

Flash Flood Warning 19, NWS St. Louis, MO

June 25, 2003Boone County, Missouri

NWS St. Louis, MO issued this flash flood warning at Jun 25, 2003, 9:18 PM CDT for Boone County, Missouri. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 25, 2003, 9:18 PM CDT (02:18 UTC)
Expired: Jun 26, 2003, 3:15 AM CDT
In force: 6 hr
Issued by: NWS St. Louis, MO
Area: Whole counties

County Boone County, MO

The radar

The St Louis radar (KLSX), 145 km from the middle of the area, began a volume at 02:19 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.

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 2.3 hours before the alert went out and 267 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: 2242 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 1157 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 86 m²/s²
0-3 km storm-relative helicity: 130 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 6.4

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KLSX 260222
FFWLSX
MOC019-260815-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
918 PM CDT WED JUN 25 2003

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

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

* UNTIL 315 AM CDT

* AT 918 PM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED            
  THUNDERSTORMS PRODUCING VERY HEAVY RAIN AROUND AND SOUTH OF        
  COLUMBIA IN BOONE COUNTY.  THESE THUNDERSTORMS ARE MOVING          
  GENERALLY EASTWARD IN AN EAST TO WEST LINE...SO AREAS THAT RECEIVE 
  RAIN MAY CONTINUE TO SEE HEAVY RAIN FOR AN EXTENDED PERIOD OF      
  TIME.  ADDITIONALLY...UP TO 3 INCHES OF RAIN HAS ALREADY FALLEN    
  ACROSS SOUTHERN PORTIONS OF BOONE COUNTY AND THIS NEW LINE OF      
  STORMS COULD ADD OVER AN INCH TO THESE WET AREAS VERY QUICKLY.

* FLASH FLOODING CAN BE EXPECTED ACROSS THE AREA...AND WILL BE       
  AFFECTING AREAS GENERALLY NEAR AND SOUTH OF COLUMBIA.

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.

$$

CARNEY

1 follow-up statement

000 
WGUS73 KLSX 260814
FFSLSX
MOC019-260830-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
315 AM CDT THU JUN 26 2003

...FLASH FLOOD WARNING FOR BOONE COUNTY HAS EXPIRED...

THE HEAVY RAINS WHICH PROMPTED THE FLASH FLOOD WARNING ENDED LATE 
WEDNESDAY EVENING...AND SINCE THEN THE FLOOD WATERS HAVE BEEN 
RECEDING.  A CHECK WITH THE BOONE COUNTY COMMUNICATIONS CENTER 
INDICATED THAT FLOODING WAS NO LONGER A PROBLEM.

$$

TRUETT

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 25, 8:18 PM CDT	Flash Flood Warning	LSX	Audrain, Pike, Ralls	6 hr
Jun 25, 8:35 PM CDT	Flash Flood Warning	LSX	Lincoln	6 hr
Jun 25, 10:04 PM CDT	Flash Flood Warning	LSX	Callaway, Montgomery	6 hr
Jun 25, 10:25 PM CDT	Flash Flood Warning	LSX	Saint Charles, Saint Louis, City of Saint Louis	6 hr
Jun 25, 11:05 PM CDT	Flash Flood Warning	LSX	Franklin, Gasconade, Warren	6 hr
Jun 26, 1:13 AM CDT	Flash Flood Warning	LSX	Jefferson	6 hr
Jun 26, 2:14 AM CDT	Flash Flood Warning	LSX	Pike	4 hr
Jun 26, 2:29 AM CDT	Flash Flood Warning	LSX	Lincoln	4 hr
Jun 26, 4:14 AM CDT	Flash Flood Warning	LSX	Saint Charles, Saint Louis, City of Saint Louis	3 hr

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.