Alert archive / Missouri / Flash Flood Warnings in 2008

Flash Flood Warning 74, NWS St. Louis, MO

July 8, 2008Ralls County, Missouri

NWS St. Louis, MO issued this flash flood warning at Jul 8, 2008, 3:10 PM CDT for Ralls County, Missouri. It was in force for 5 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: Jul 8, 2008, 3:10 PM CDT (20:10 UTC)
Expired: Jul 8, 2008, 8:15 PM CDT
In force: 5 hr
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Flood severity: None

County Ralls County, MO

What was reported inside it

Time	Report	Where	Remark
Jul 8, 4:24 PM CDT	FLASH FLOOD	5 Sw Hannibal, MO	ESTIMATED FOOT OF WATER OVER CEDAR COVE PLACE.
Jul 8, 4:24 PM CDT	HEAVY RAIN 2.17	4 Sw Hannibal, MO	RESIDENT ALONG CEDAR COVE PLACE REPORTS 1.46 INCHES FELL IN ONE HOUR. DAILY TOTAL OF 2.17 INCHES IS SINCE MIDNIGHT.

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

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 8.2 hours before the alert went out and 237 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: 80 J/kg
Mixed-layer CIN: -136 J/kg
Mixed-layer LCL: 700 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 50 m²/s²
0-3 km storm-relative helicity: 15 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KLSX 082011
FFWLSX
MOC173-090115-
/O.NEW.KLSX.FF.W.0074.080708T2010Z-080709T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
310 PM CDT TUE JUL 8 2008

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN RALLS COUNTY IN NORTHEAST MISSOURI

* UNTIL 815 PM CDT

* AT 308 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  FLASH FLOODING OVER THE WARNED AREA. RADAR ESTIMATES UP TO 2       
  INCHES HAS FALLEN AND ADDITIONAL THUNDERSTORM ACTIVITY COULD       
  PRODUCE ANOTHER INCH OR MORE OF RAIN.

* FLASH FLOODING CAN BE EXPECTED ACROSS THE AREA...AND WILL BE
  AFFECTING SPAULDING...RENSSELAER AND NEW LONDON.

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.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

LAT...LON 3968 9131 3960 9121 3951 9139 3952 9172
      3969 9172

$$

CARNEY

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 8, 1:45 PM CDT	Flash Flood Watch	LSX	Audrain, Boone, Callaway, Cole, Crawford, Franklin and 14 more	14 hr
Jul 8, 2:41 PM CDT	Areal Flood Advisory	LSX	Shelby	6 hr
Jul 8, 2:45 PM CDT	Severe Thunderstorm Warning	LSX	Marion, Ralls	45 min
Jul 8, 3:14 PM CDT	Flash Flood Warning	LSX	Marion	5 hr
Jul 8, 3:29 PM CDT	Tornado Warning	LSX	Ralls	46 min
Jul 8, 4:02 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Boone	30 min
Jul 8, 4:31 PM CDT	Areal Flood Advisory	LSX	Monroe	3 days
Jul 8, 4:52 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Callaway, Lincoln, Montgomery, Pike, Ralls and 1 more	53 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.