Alert archive / Missouri / Flash Flood Warnings in 2012

Flash Flood Warning 1, NWS St. Louis, MO

March 15, 2012Crawford County, Washington County, Missouri

NWS St. Louis, MO issued this flash flood warning at Mar 15, 2012, 3:11 PM CDT for Crawford County, Washington 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 15, 2012, 3:11 PM CDT (20:11 UTC)
Expired
Mar 15, 2012, 6:00 PM CDT
In force
3 hr
Issued by
NWS St. Louis, MO
Area
Storm-based polygon
Flood severity
None

Counties Crawford County, MO, Washington County, MO

The radar

The St Louis radar (KLSX), 83 km from the middle of the area, began a volume at 20:10 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, 8.2 hours before the alert went out and 268 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 2012-03-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1947 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Springfield, MO at 12:00Z on 2012-03-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 130 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
1947 J/kg
Mixed-layer CIN
-23 J/kg
Mixed-layer LCL
758 m above ground
0-6 km bulk shear
21 kt
0-1 km storm-relative helicity
130 m²/s²
0-3 km storm-relative helicity
105 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.

387 
WGUS53 KLSX 152011
FFWLSX
MOC055-221-152300-
/O.NEW.KLSX.FF.W.0001.120315T2011Z-120315T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
311 PM CDT THU MAR 15 2012

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

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

* UNTIL 600 PM CDT

* AT 310 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE     
  WARNED AREA.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  ANTHONIES MILL.

THIS INCLUDES THE FOLLOWING STREAMS AND DRAINAGES...
MERAMEC RIVER...LICK CREEK...DRY FORK...COURTOIS CREEK...WHITTENBURG
CREEK...LITTLE BOURBEUSE RIVER...HINCH BRANCH...SHOAL CREEK...CROOKED
CREEK...LITTLE COURTOIS CREEK...INDIAN CREEK...NORTHCUT BRANCH...
BRUSHY FORK...BRAZIL CREEK...DOSS BRANCH...FLAGG BRANCH...BILLYS
BRANCH...MINERAL FORK AND DRY CREEK.

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.

&&

LAT...LON 3809 9100 3796 9098 3796 9133 3809 9133

$$

MILLER

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 14, 7:00 PM CDTSevere Thunderstorm WarningLSXJefferson45 min
Mar 15, 1:56 PM CDTSevere Thunderstorm WarningLSXCrawford, Washington49 min
Mar 15, 2:22 PM CDTSevere Thunderstorm WarningLSXCrawford19 min
Mar 15, 3:19 PM CDTSevere Thunderstorm WarningLSXWashington26 min
Mar 15, 3:23 PM CDTSevere Thunderstorm WarningLSXFranklin, Saint Charles, Warren37 min
Mar 15, 3:27 PM CDTSevere Thunderstorm WarningLSXGasconade, Osage48 min
Mar 15, 3:47 PM CDTSevere Thunderstorm WarningLSXCrawford, Washington19 min
Mar 15, 3:48 PM CDTSevere Thunderstorm WarningLSXCrawford, Washington42 min
Mar 15, 3:59 PM CDTSevere Thunderstorm WarningLSXSaint Charles, Warren46 min
Mar 15, 4:12 PM CDTSevere Thunderstorm WarningLSXSaint Charles, Saint Louis33 min
Mar 15, 4:26 PM CDTFlash Flood WarningLSXCrawford, Washington3 hr
Mar 15, 4:46 PM CDTSevere Thunderstorm WarningLSXSaint Charles29 min
Mar 15, 4:50 PM CDTSevere Thunderstorm WarningLSXLincoln40 min
Mar 15, 5:20 PM CDTSevere Thunderstorm WarningLSXLincoln, Montgomery, Warren26 min
Mar 15, 6:16 PM CDTFlash Flood WarningLSXCrawford, Washington4 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.