Alert archive / Texas / Flash Flood Warnings in 2012

Flash Flood Warning 41, NWS Midland/Odessa, TX

September 29, 2012Mitchell County, Texas

NWS Midland/Odessa, TX issued this flash flood warning at Sep 29, 2012, 1:32 AM CDT for Mitchell County, Texas. It was in force for 4 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
Sep 29, 2012, 1:32 AM CDT (06:32 UTC)
Expired
Sep 29, 2012, 5:30 AM CDT
In force
4 hr
Issued by
NWS Midland/Odessa, TX
Area
Storm-based polygon
Flood severity
None

County Mitchell County, TX

The radar

The San Angelo radar (KSJT), 118 km from the middle of the area, began a volume at 06:34 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

Midland Regional, TX (KMAF), launched 00:00Z, 6.5 hours before the alert went out and 124 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, Midland Regional, TX at 00:00Z on 2012-09-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 88 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, Midland Regional, TX at 00:00Z on 2012-09-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 90 square meters per square second.19395878Sfc1 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
88 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
496 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
90 m²/s²
0-3 km storm-relative helicity
159 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.

874 
WGUS54 KMAF 290632
FFWMAF
TXC335-291030-
/O.NEW.KMAF.FF.W.0041.120929T0632Z-120929T1030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MIDLAND/ODESSA TX
132 AM CDT SAT SEP 29 2012

THE NATIONAL WEATHER SERVICE IN MIDLAND HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  MITCHELL COUNTY IN WEST TEXAS...

* UNTIL 530 AM CDT

* AT 124 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED   
  SHOWERS WITH HEAVY RAIN OVERSPREADING MITCHELL COUNTY.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO            
  WESTBROOK...LORAINE...CUTHBERT AND COLORADO CITY..AND IN AND       
  ROUND FARM TO MARKET ROAD 2183...STATE ROAD 208...AND STATE        
  HIGHWAY 163.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MITCHELL COUNTY RECEIVED WIDESPREAD HEAVY RAIN ON FRIDAY AND WITH 
THE GROUND SATURATED RUNOFF WILL DEVELOP QUICKLY. THERE STILL MAY BE 
FLOODED ROADWAYS...LOW WATER CROSSING...AND CREEKS FROM THE EARLIER 
RAINS ESPECIALLY IN SOUTHWEST MITCHELL COUNTY.

FLASH FLOODING OF CREEKS AND STREAMS... LOW WATER CROSSINGS...
NORMALLY DRY WASHES AND ARROYOS... AND LOW LYING FARMLAND IS LIKELY.
DO NOT DRIVE ACROSS FLOODED ROADS.

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.

&&

LAT...LON 3252 10116 3252 10067 3209 10068 3210 10118

$$

The office that day

Everything else NWS Midland/Odessa, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 28, 7:31 PM CDTAreal Flood AdvisoryMAFPecos, Reeves, Ward3 hr
Sep 28, 8:59 PM CDTAreal Flood AdvisoryMAFEctor, Midland3 hr
Sep 28, 9:26 PM CDTRiver Flood WarningMAFPresidio13 hr
Sep 28, 9:26 PM CDTRiver Flood WarningMAFBrewster, Presidio13 hr
Sep 28, 9:26 PM CDTRiver Flood WarningMAFBrewster13 hr
Sep 28, 9:42 PM CDTFlash Flood WarningMAFEctor, Midland3 hr
Sep 28, 10:22 PM CDTRiver Flood WarningMAFPresidio12 hr
Sep 28, 10:24 PM CDTFlash Flood WarningMAFCrane, Pecos, Reeves, Ward, Winkler3 hr
Sep 28, 11:42 PM CDTFlash Flood WarningMAFPecos3 hr
Sep 29, 12:25 AM CDTFlash Flood WarningMAFCrane, Ector, Midland, Reeves, Ward, Winkler4 hr
Sep 29, 2:59 AM CDTFlash Flood WarningMAFPecos3 hr
Sep 29, 4:24 AM CDTAreal Flood AdvisoryMAFCrane, Ector, Glasscock, Midland4 hr
Sep 29, 5:35 AM CDTAreal Flood AdvisoryMAFHoward, Mitchell4 hr
Sep 29, 5:59 AM CDTAreal Flood AdvisoryMAFPecos4 hr

Nearby

Flash Flood Warnings in Texas, 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.