Alert archive / Texas / Flash Flood Warnings in 2012

Flash Flood Warning 33, NWS Midland/Odessa, TX

September 28, 2012Howard County, Texas

NWS Midland/Odessa, TX issued this flash flood warning at Sep 28, 2012, 9:02 AM CDT for Howard 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 28, 2012, 9:02 AM CDT (14:02 UTC)
Expired
Sep 28, 2012, 1:00 PM CDT
In force
4 hr
Issued by
NWS Midland/Odessa, TX
Area
Storm-based polygon
Flood severity
None

County Howard County, TX

The radar

The Midland/Odessa radar (KMAF), 79 km from the middle of the area, began a volume at 14:02 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

Amarillo Airport, TX (KAMA), launched 12:00Z, 2.0 hours before the alert went out and 322 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, Amarillo Airport, TX at 12:00Z on 2012-09-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 31 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, Amarillo Airport, TX at 12:00Z on 2012-09-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -8 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
31 J/kg
Mixed-layer CIN
-78 J/kg
Mixed-layer LCL
767 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
-8 m²/s²
0-3 km storm-relative helicity
-15 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.

073 
WGUS54 KMAF 281402
FFWMAF
TXC227-281800-
/O.NEW.KMAF.FF.W.0033.120928T1402Z-120928T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MIDLAND/ODESSA TX
902 AM CDT FRI SEP 28 2012

THE NATIONAL WEATHER SERVICE IN MIDLAND HAS ISSUED A

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

* UNTIL 100 PM CDT

* AT 856 AM CDT...LOCAL LAW ENFORCEMENT OFFICIALS HAVE REPORTED FLASH
  FLOODING WITH STORMS AT BIG SPRING.  ADDITIONAL HEAVY RAIN IS      
  OCCURRING AND FLOODING WILL CONTINUE.

* THE THUNDERSTORM PRODUCING FLASH FLOODING WILL AFFECT THE FOLLOWING
LOCATIONS...
  BIG SPRING...
  COAHOMA...
  VINCENT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3250 10168 3250 10121 3211 10121 3210 10168

$$
1 follow-up statement
260 
WGUS74 KMAF 281741
FFSMAF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MIDLAND/ODESSA TX
1241 PM CDT FRI SEP 28 2012

TXC227-281800-
/O.CON.KMAF.FF.W.0033.000000T0000Z-120928T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HOWARD-
1241 PM CDT FRI SEP 28 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 100 PM CDT FOR
HOWARD COUNTY...

AT 1236 PM CDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED 
SOME ROADS REMAIN CLOSED AT LOW WATER CROSSINGS BUT CONDITIONS
HAVE IMPROVED SINCE THE RAIN LIGHTENED UP.  THE WARNING WILL
BE ALLOWED TO CONTINUE UNTIL EXPIRATION.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO VINCENT...
LUTHER...KNOTT AND FAIRVIEW.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3250 10168 3250 10121 3211 10121 3210 10168

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 27, 7:04 PM CDTAreal Flood AdvisoryMAFMidland3 hr
Sep 28, 3:54 AM CDTAreal Flood AdvisoryMAFMidland3 hr
Sep 28, 4:11 AM CDTFlash Flood WatchMAFAndrews, Borden, Crane, Dawson, Ector, Gaines and 13 more33 hr
Sep 28, 4:45 AM CDTFlash Flood WarningMAFEctor, Midland3 hr
Sep 28, 5:13 AM CDTAreal Flood AdvisoryMAFBorden, Dawson, Howard, Martin3 hr
Sep 28, 5:53 AM CDTFlash Flood WarningMAFHoward3 hr
Sep 28, 7:03 AM CDTFlash Flood WarningMAFMartin3 hr
Sep 28, 7:07 AM CDTFlash Flood WarningMAFMitchell3 hr
Sep 28, 7:28 AM CDTFlash Flood WarningMAFEctor, Midland3 hr
Sep 28, 8:01 AM CDTAreal Flood AdvisoryMAFBorden, Scurry3 hr
Sep 28, 8:04 AM CDTAreal Flood AdvisoryMAFGlasscock3 hr
Sep 28, 9:49 AM CDTFlash Flood WarningMAFMitchell4 hr
Sep 28, 10:07 AM CDTAreal Flood AdvisoryMAFMartin3 hr
Sep 28, 10:21 AM CDTAreal Flood AdvisoryMAFCrane, Upton3 hr
Sep 28, 10:22 AM CDTFlash Flood WarningMAFEctor, Midland4 hr
Sep 28, 10:28 AM CDTAreal Flood AdvisoryMAFPecos, Terrell3 hr
Sep 28, 11:07 AM CDTAreal Flood AdvisoryMAFScurry3 hr
Sep 28, 12:06 PM CDTAreal Flood AdvisoryMAFWard114 min
Sep 28, 1:37 PM CDTRiver Flood WarningMAFMitchell7 hr
Sep 28, 2:03 PM CDTAreal Flood AdvisoryMAFPecos, Reeves, Ward3 hr
Sep 28, 2:53 PM CDTAreal Flood AdvisoryMAFBrewster, Jeff Davis, Pecos, Reeves3 hr
Sep 28, 5:53 PM CDTAreal Flood AdvisoryMAFEctor, Midland3 hr
Sep 28, 6:50 PM CDTRiver Flood WarningMAFPresidio16 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.