Alert archive / Missouri / Flash Flood Warnings in 2008

Flash Flood Warning 90, NWS St. Louis, MO

August 5, 20084 counties in Missouri

NWS St. Louis, MO issued this flash flood warning at Aug 5, 2008, 4:44 PM CDT for 4 counties in Missouri. It was in force for 6 hr. 2 reports 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: Aug 5, 2008, 4:44 PM CDT (21:44 UTC)
Expired: Aug 5, 2008, 10:45 PM CDT
In force: 6 hr
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Flood severity: None

Counties Audrain County, MO, Monroe County, MO, Pike County, MO, Ralls County, MO

The radar

The St Louis radar (KLSX), 99 km from the middle of the area, began a volume at 21:47 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
Aug 5, 5:15 PM CDT	HEAVY RAIN 1.65	Bowling Green, MO	THE RAIN FELL IN A 35 MINUTE PERIOD.
Aug 5, 8:00 PM CDT	FLOOD	Spencerburg, MO	HWY E EAST OF SPENCERBURG IS CLOSED

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

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 9.7 hours before the alert went out and 250 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: 618 J/kg
Mixed-layer CIN: -237 J/kg
Mixed-layer LCL: 1293 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 35 m²/s²
0-3 km storm-relative helicity: 79 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.2

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KLSX 052144
FFWLSX
MOC007-137-163-173-060345-
/O.NEW.KLSX.FF.W.0090.080805T2144Z-080806T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
444 PM CDT TUE AUG 5 2008

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN AUDRAIN COUNTY IN CENTRAL MISSOURI
  SOUTHEASTERN MONROE COUNTY IN NORTHEAST MISSOURI
  PIKE COUNTY IN NORTHEAST MISSOURI
  SOUTHERN RALLS COUNTY IN NORTHEAST MISSOURI

* UNTIL 1045 PM CDT

* AT 439 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  THUNDERSTORMS PRODUCING VERY HEAVY RAINFALL OVER THE WARNED AREA.  
  FLASH FLOODING IS LIKELY IN THE WARNED AREA. ONE TO LOCALLY 2      
  INCHES OF RAINFALL HAS ALREADY OCCURRED...WITH ANOTHER 1 TO        
  2 INCHES OF RAINFALL LIKELY THROUGH 6 PM. 

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.

LAT...LON 3944 9209 3960 9120 3954 9114 3952 9109
      3944 9103 3929 9077 3923 9073 3924 9211

$$

CVKING

2 follow-up statements

000 
WGUS73 KLSX 052346
FFSLSX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
646 PM CDT TUE AUG 5 2008

MOC007-137-163-173-060345-
/O.CON.KLSX.FF.W.0090.000000T0000Z-080806T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
AUDRAIN MO-PIKE MO-MONROE MO-RALLS MO-
646 PM CDT TUE AUG 5 2008

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1045 PM CDT FOR
NORTHERN AUDRAIN COUNTY IN CENTRAL MISSOURI...AND SOUTHERN RALLS...
SOUTHEASTERN MONROE AND PIKE COUNTIES IN NORTHEAST MISSOURI...

AT 642 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE THUNDERSTORMS MOVING ACROSS THE WARNED AREA. LOCALLY HEAVY 
RAINFALL IS EXPECTED TO CONTINUE WITHIN THUNDERSTORMS. 

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
SPENCERBURG...PERRY...LOUISIANA...FRANKFORD AND CENTER.

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.

LAT...LON 3944 9209 3960 9120 3954 9114 3952 9109
      3944 9103 3929 9077 3923 9073 3924 9211

$$

CVKING

000 
WGUS73 KLSX 060345
FFSLSX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1045 PM CDT TUE AUG 5 2008

MOC007-137-163-173-060355-
/O.EXP.KLSX.FF.W.0090.000000T0000Z-080806T0345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
AUDRAIN MO-PIKE MO-MONROE MO-RALLS MO-
1045 PM CDT TUE AUG 5 2008

...THE FLASH FLOOD WARNING HAS EXPIRED FOR NORTHERN AUDRAIN COUNTY IN
CENTRAL MISSOURI...AND SOUTHERN RALLS...SOUTHEASTERN MONROE AND PIKE
COUNTIES IN NORTHEAST MISSOURI...

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

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

LAT...LON 3944 9209 3960 9120 3954 9114 3952 9109
      3944 9103 3929 9077 3923 9073 3924 9211

$$

TRUETT

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 5, 2:29 PM CDT	Severe Thunderstorm Warning	LSX	Marion, Pike, Ralls	46 min
Aug 5, 2:56 PM CDT	Severe Thunderstorm Warning	LSX	Pike	49 min
Aug 5, 3:14 PM CDT	Severe Thunderstorm Warning	LSX	Marion, Pike, Ralls	46 min
Aug 5, 3:23 PM CDT	Flash Flood Warning	LSX	Marion, Ralls	6 hr
Aug 5, 4:05 PM CDT	Severe Thunderstorm Warning	LSX	Pike	40 min
Aug 5, 4:14 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Monroe, Ralls	61 min
Aug 5, 4:18 PM CDT	Severe Thunderstorm Warning	LSX	Sainte Genevieve	42 min
Aug 5, 4:44 PM CDT	Severe Thunderstorm Warning	LSX	Pike	46 min
Aug 5, 4:57 PM CDT	Flash Flood Warning	LSX	Sainte Genevieve	6 hr
Aug 5, 5:03 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Pike	42 min
Aug 5, 5:24 PM CDT	Severe Thunderstorm Warning	LSX	Washington	51 min
Aug 5, 5:30 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Pike, Saint Charles	60 min
Aug 5, 5:59 PM CDT	Severe Thunderstorm Warning	LSX	Sainte Genevieve	46 min
Aug 5, 6:05 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Saint Francois, Washington	55 min
Aug 5, 6:09 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis, City of Saint Louis	51 min
Aug 5, 6:40 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Montgomery, Saint Charles, Warren	50 min
Aug 5, 6:41 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade	49 min
Aug 5, 6:44 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Sainte Genevieve, Saint Francois	61 min
Aug 5, 6:59 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Gasconade	61 min

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.