Alert archive / Missouri / Flash Flood Warnings in 2008

Flash Flood Warning 55, NWS St. Louis, MO

June 8, 2008Shelby County, Missouri

NWS St. Louis, MO issued this flash flood warning at Jun 8, 2008, 10:17 PM CDT for Shelby 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 outline as issued.

The facts

Issued: Jun 8, 2008, 10:17 PM CDT (03:17 UTC)
Expired: Jun 9, 2008, 4:15 AM CDT
In force: 6 hr
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Flood severity: None

County Shelby County, MO

The radar

The St Louis radar (KLSX), 166 km from the middle of the area, began a volume at 03:17 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

Davenport, (KDVN), launched 00:00Z, 3.3 hours before the alert went out and 247 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: 2433 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 1200 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 157 m²/s²
0-3 km storm-relative helicity: 166 m²/s²
Significant tornado parameter: 1.4
Supercell composite: 10.9

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KLSX 090319
FFWLSX
MOC205-090915-
/O.NEW.KLSX.FF.W.0055.080609T0317Z-080609T0915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1017 PM CDT SUN JUN 8 2008

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SHELBY COUNTY IN NORTHEAST MISSOURI

* UNTIL 415 AM CDT

* AT 1013 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR            
  INDICATED THUNDERSTORMS PRODUCING HEAVY RAINFALL ACROSS SHELBY     
  COUNTY. THIS HEAVY RAINFALL WILL LEAD TO EXCESSIVE RAINFALL AND    
  FLASH FLOODING OF LOW LYING AREAS.

* FLASH FLOODING CAN BE EXPECTED ACROSS THE AREA...AND WILL INCLUDE  
  BLACK CREEK...THE SALT RIVER...CROOKED CREEK AND THE NORTH RIVER. 

AN ADDITIONAL 1 TO 2 INCHES OF RAINFALL CAN BE EXPECTED BETWEEN 10 
PM AND MIDNIGHT. 

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.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. 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.

LAT...LON 3995 9185 3970 9185 3966 9186 3966 9219
      3962 9219 3961 9220 3961 9230 3995 9229
TIME...MOT...LOC 0317Z 180DEG 0KT 3983 9207

$$

CVKING

1 follow-up statement

000 
WGUS73 KLSX 090912
FFSLSX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
411 AM CDT MON JUN 9 2008

MOC205-090921-
/O.EXP.KLSX.FF.W.0055.000000T0000Z-080609T0915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
SHELBY MO-
411 AM CDT MON JUN 9 2008

...THE FLASH FLOOD WARNING WILL EXPIRE AT 415 AM CDT FOR SHELBY
COUNTY...

A CHECK WITH AREA LAW ENFORCEMENT INDICATES THAT FLOODING IS NO
LONGER A PROBLEM IN THE AREA.

MOTORISTS SHOULD USE CAUTION WHEN APPROACHING AREAS THAT EXPERIENCED
HIGH WATER LEVELS...AS THE FAST FLOWING WATER MAY HAVE DAMAGED
ROADWAYS AND BRIDGES.

LAT...LON 3995 9185 3970 9185 3966 9186 3966 9219
      3962 9219 3961 9220 3961 9230 3995 9229
TIME...MOT...LOC 0911Z 180DEG 0KT 3983 9207

$$

TILLY

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 8, 9:24 PM CDT	Areal Flood Advisory	LSX	Knox, Lewis, Shelby	6 hr

Nearby

Flash Flood Warnings in Missouri, 2008 Every flash flood warning in 2008

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.