Alert archive / Missouri / Flash Flood Warnings in 2008

Flash Flood Warning 5, NWS St. Louis, MO

February 5, 2008Jefferson County, Washington County, Missouri

NWS St. Louis, MO issued this flash flood warning at Feb 5, 2008, 6:13 PM CST for Jefferson County, Washington County, Missouri. It was in force for 5 hr. 1 report 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: Feb 5, 2008, 6:13 PM CST (00:13 UTC)
Expired: Feb 5, 2008, 11:15 PM CST
In force: 5 hr
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Flood severity: None

Counties Jefferson County, MO, Washington County, MO

The radar

The St Louis radar (KLSX), 53 km from the middle of the area, began a volume at 00:14 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
Feb 5, 9:45 PM CST	FLOOD	Potosi, MO	LOTS OF LOW WATER CROSSINGS FLOODED...DITCHES AND CREEKS VERY FULL.

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 00:00Z, 0.2 hours before the alert went out and 276 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 449 m above ground
0-6 km bulk shear: 92 kt
0-1 km storm-relative helicity: 474 m²/s²
0-3 km storm-relative helicity: 387 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 060016
FFWLSX
MOC099-221-060515-
/O.NEW.KLSX.FF.W.0005.080206T0013Z-080206T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
613 PM CST TUE FEB 5 2008

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  JEFFERSON COUNTY IN EAST CENTRAL MISSOURI
  WASHINGTON COUNTY IN EAST CENTRAL MISSOURI

* UNTIL 1115 PM CST

* AT 608 PM CST...TRAINED WEATHER SPOTTERS REPORTED FLASH FLOODING
  OVER THE WARNED AREA. RADAR ESTIMATES OF 1 TO 3 INCHES OF RAIN HAS
  FALLEN OVER WASHINGTON AND JEFFERSON COUNTIES SINCE NOON. AN 
  ADDITIONAL 1 TO 2 INCHES IS POSSIBLE WITH THE STRONGER STORMS.

* FLASH FLOODING CAN BE EXPECTED ACROSS THE AREA...AND WILL BE
  AFFECTING RICHWOODS...OLD MINESPEVELY...OLYMPIAN VILLAGE...
  MURPHY...HOUSE   SPRINGS...HILLSBORO...HIGH RIDGE...HERCULANEUM  
  ...FESTUS...DITTMER...DE SOTO...CRYSTAL CITY...CEDAR HILL...
  BYRNES MILL...BARNHART...ARNOLD AND ANTONIA.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

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 3820 9110 3821 9078 3846 9074 3845 9067
      3848 9066 3850 9059 3850 9041 3846 9041
      3845 9034 3829 9038 3821 9036 3812 9025
      3800 9059 3801 9062 3808 9064 3774 9066
      3774 9110
TIME...MOT...LOC 0013Z 180DEG 0KT 3809 9073

$$

BYRD

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 5, 7:24 PM CST	Flash Flood Warning	LSX	Iron, Madison, Reynolds, Sainte Genevieve, Saint Francois	6 hr
Feb 5, 7:40 PM CST	River Flood Warning	LSX	Marion	25 hr
Feb 5, 8:54 PM CST	Flash Flood Warning	LSX	Crawford	4 hr
Feb 6, 3:05 AM CST	River Flood Warning	LSX	Osage	11 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.