Alert archive / Missouri / Flash Flood Warnings in 2008

Flash Flood Warning 9, NWS St. Louis, MO

March 17, 2008Audrain County, Boone County, Callaway County, Missouri

NWS St. Louis, MO issued this flash flood warning at Mar 17, 2008, 2:39 PM CDT for Audrain County, Boone County, Callaway County, Missouri. It was in force for 3 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: Mar 17, 2008, 2:39 PM CDT (19:39 UTC)
Expired: Mar 17, 2008, 5:45 PM CDT
In force: 3 hr
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Flood severity: None

Counties Audrain County, MO, Boone County, MO, Callaway County, MO

The radar

The St Louis radar (KLSX), 129 km from the middle of the area, began a volume at 19:41 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 12:00Z, 7.7 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: 1121 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 735 m²/s²
0-3 km storm-relative helicity: 823 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KLSX 171942
FFWLSX
MOC007-019-027-172245-
/O.NEW.KLSX.FF.W.0009.080317T1939Z-080317T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
239 PM CDT MON MAR 17 2008

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHERN AUDRAIN COUNTY IN CENTRAL MISSOURI
  BOONE COUNTY IN CENTRAL MISSOURI
  NORTHWESTERN CALLAWAY COUNTY IN CENTRAL MISSOURI

* UNTIL 545 PM CDT

* AT 231 PM CDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED FLASH     
  FLOODING OVER THE WARNED AREA. BETWEEN STURGEON AND CENTRALIA      
  WATER UP TO ONE FOOT DEEP IS FLOWING OVER SECONDARY ROADS WITH     
  SMALL CREEKS OVERFLOWING. RADAR INDICATES BETWEEN 1 AND 2  INCHES  
  OF RAIN HAS FALLEN IN THE PAST 12 HOURS.
* FLASH FLOODING CAN BE EXPECTED ACROSS THE AREA...AND WILL BE
  AFFECTING STURGEON...MURRY...HALLSVILLE AND AUXVASSE.

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.

LAT...LON 3909 9180 3870 9223 3887 9248 3925 9229
TIME...MOT...LOC 1939Z 180DEG 0KT 3899 9218

$$

CVKING

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 17, 7:52 AM CDT	Severe Thunderstorm Warning	LSX	Iron, Sainte Genevieve, Saint Francois, Washington	38 min
Mar 17, 8:28 AM CDT	Severe Thunderstorm Warning	LSX	Sainte Genevieve, Saint Francois	47 min
Mar 17, 9:02 AM CDT	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Washington	32 min
Mar 17, 9:25 AM CDT	Severe Thunderstorm Warning	LSX	Callaway, Gasconade, Montgomery, Osage, Warren	29 min
Mar 17, 10:11 AM CDT	River Flood Warning	LSX	Lincoln	3 days
Mar 17, 10:17 AM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis, City of Saint Louis	26 min
Mar 17, 10:20 AM CDT	Severe Thunderstorm Warning	LSX	Callaway, Gasconade, Montgomery, Osage	25 min
Mar 17, 10:41 AM CDT	River Flood Warning	LSX	Marion	28 hr
Mar 17, 10:42 AM CDT	Severe Thunderstorm Warning	LSX	Montgomery, Warren	17 min
Mar 17, 11:35 AM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Montgomery, Pike, Warren	25 min
Mar 17, 12:43 PM CDT	River Flood Warning	LSX	Cole	3 days

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.