Alert archive / Missouri / Flash Flood Warnings in 2012

Flash Flood Warning 12, NWS St. Louis, MO

March 17, 2012Crawford County, Missouri

NWS St. Louis, MO issued this flash flood warning at Mar 17, 2012, 6:13 PM CDT for Crawford County, Missouri. It was in force for 6 hr. 4 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
Mar 17, 2012, 6:13 PM CDT (23:13 UTC)
Expired
Mar 18, 2012, 12:00 AM CDT
In force
6 hr
Issued by
NWS St. Louis, MO
Area
Storm-based polygon
Flood severity
None

County Crawford County, MO

The radar

The St Louis radar (KLSX), 100 km from the middle of the area, began a volume at 23:13 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

TimeReportWhereRemark
Mar 17, 6:30 PM CDTFLASH FLOODCuba, MONUMEROUS LOW WATER CROSSINGS FLOODED NEAR CUBA.
Mar 17, 7:10 PM CDTFLASH FLOODCuba, MOFLOODING AND STREETS AND YARDS IN CUBA...ALSO SOME BASEMENT FLOODING REPORTED.
Mar 17, 10:00 PM CDTFLASH FLOODBourbon, MOSOME WATER OVER HIGHWAY C JUST NORTHWEST OF BOURBON. BRAND ROAD JUST SOUTH OF HIGHWAY C WAS CLOSED DUE TO FLOODING.
Mar 17, 11:30 PM CDTFLOODCuba, MOHIGHWAY ZZ IS IMPASSABLE WEST OF CUBA.

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

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 11.2 hours before the alert went out and 246 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-pSkew-T log-p diagram, Springfield, MO at 12:00Z on 2012-03-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1549 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Springfield, MO at 12:00Z on 2012-03-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 71 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1549 J/kg
Mixed-layer CIN
-22 J/kg
Mixed-layer LCL
724 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
71 m²/s²
0-3 km storm-relative helicity
83 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.

239 
WGUS53 KLSX 172313
FFWLSX
MOC055-180500-
/O.NEW.KLSX.FF.W.0012.120317T2313Z-120318T0500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
613 PM CDT SAT MAR 17 2012

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CRAWFORD COUNTY IN EAST CENTRAL MISSOURI...

* UNTIL MIDNIGHT CDT

* AT 609 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE
  WARNED AREA. RADAR IS ESTIMATING BETWEEN 1 AND 2 INCHES OF RAIN
  HAS FALLEN IN A NARROW LINE FROM WEST OF CUBA TO JUST SOUTHWEST
  OF ANTHONIES MILL SINCE 5 PM.   THE HEAVIEST RAINS HAVE BEEN
  CENTERED NEAR CUBA...AND RADAR INDICATES POCKETS OF HEAVY RAIN
  WILL PERSIST FOR ANOTHER 1 TO 2 HOURS.  

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  BOURBON...CUBA...STEELVILLE...CHERRYVILLE AND LEASBURG.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE
POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO TRAVEL ACROSS
FLOODED ROADS. FIND ALTERNATE ROUTES. IT ONLY TAKES A FEW INCHES OF
SWIFTLY FLOWING WATER TO CARRY VEHICLES AWAY.

&&

LAT...LON 3781 9153 3821 9153 3820 9110 3782 9110

$$

TRUETT

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 17, 2:22 PM CDTFlash Flood WarningLSXOsage4 hr
Mar 17, 3:38 PM CDTFlash Flood WatchLSXCrawford, Franklin, Gasconade, Jefferson, Osage, Saint Charles and 6 more6 hr
Mar 17, 3:59 PM CDTSevere Thunderstorm WarningLSXJefferson46 min
Mar 17, 4:54 PM CDTAreal Flood AdvisoryLSXSaint Louis, City of Saint Louis4 hr
Mar 17, 5:13 PM CDTAreal Flood AdvisoryLSXSaint Charles4 hr
Mar 17, 5:51 PM CDTSevere Thunderstorm WarningLSXCrawford25 min
Mar 17, 6:23 PM CDTFlash Flood WarningLSXOsage4 hr

Nearby

Flash Flood Warnings in Missouri, 2012Every flash flood warning in 2012

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.