Alert archive / Texas / Flash Flood Warnings in 2008

Flash Flood Warning 39, NWS Midland/Odessa, TX

August 18, 2008Brewster County, Jeff Davis County, Texas

NWS Midland/Odessa, TX issued this flash flood warning at Aug 18, 2008, 8:17 PM CDT for Brewster County, Jeff Davis County, Texas. It was in force for 118 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Aug 18, 2008, 8:17 PM CDT (01:17 UTC)
Expired
Aug 18, 2008, 10:15 PM CDT
In force
118 min
Issued by
NWS Midland/Odessa, TX
Area
Storm-based polygon
Flood severity
None

Counties Brewster County, TX, Jeff Davis County, TX

The radar

The Midland/Odessa radar (KMAF), 223 km from the middle of the area, began a volume at 01:17 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, 1.3 hours before the alert went out and 223 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 2008-08-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 362 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, Midland Regional, TX at 00:00Z on 2008-08-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 4 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
362 J/kg
Mixed-layer CIN
-75 J/kg
Mixed-layer LCL
1402 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
4 m²/s²
0-3 km storm-relative helicity
63 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.6

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KMAF 190117
FFWMAF
TXC043-243-190315-
/O.NEW.KMAF.FF.W.0039.080819T0117Z-080819T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE MIDLAND/ODESSA TX
817 PM CDT MON AUG 18 2008

THE NATIONAL WEATHER SERVICE IN MIDLAND HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHWESTERN BREWSTER COUNTY IN SOUTHWEST TEXAS...
  SOUTHEASTERN JEFF DAVIS COUNTY IN SOUTHWEST TEXAS...

* UNTIL 1015 PM CDT

* AT 812 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED   
  SHOWERS AND THUNDERSTORMS WITH VERY HEAVY RAIN OVER THE WARNED     
  AREA.

* THE STORM PRODUCING FLASH FLOODING WILL BE THE ALPINE AREA AND     
  MAINLY RURAL AREAS NORTHEAST OF ALPINE.

THIS AREA HAD HEAVY RAIN EARLIER TODAY AND ADDITIONAL RAINFALL IS 
EXPECTED TO INCREASE THE POTENTIAL FOR FLASH FLOODING IN THE WARNED 
AREA.

FLASH FLOODING OF CREEKS AND STREAMS... STREETS AND UNDERPASSES...LOW
WATER CROSSINGS IS LIKELY. DO NOT DRIVE ACROSS FLOODED ROADS.

MOST FLOODING DEATHS ARE PREVENTABLE... AND MANY OCCUR WHEN MOTORISTS
DRIVE ACROSS FLOODED ROADWAYS. IT IS NEVER SAFE TO DRIVE ON FLOODED
ROADS. IT ONLY TAKES A FEW INCHES OF RAPIDLY FLOWING WATER TO QUICKLY
CARRY AWAY YOUR VEHICLE. TURN AROUND... DONT DROWN.

LAT...LON 3056 10379 3075 10359 3029 10294 2985 10344
      2985 10377

$$
1 follow-up statement
000 
WGUS74 KMAF 190157
FFSMAF

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE MIDLAND/ODESSA TX
857 PM CDT MON AUG 18 2008

TXC043-243-190315-
/O.CON.KMAF.FF.W.0039.000000T0000Z-080819T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BREWSTER-JEFF DAVIS-
857 PM CDT MON AUG 18 2008

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1015 PM CDT FOR
SOUTHEASTERN JEFF DAVIS AND NORTHWESTERN BREWSTER COUNTIES...

AT 849 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO 
DETECT THUNDERSTORMS PRODUCING VERY HEAVY RAIN WITH INCREASED 
POTENTIAL FOR FLASH FLOODING OVER THE WARNED AREA. THE STORMS HAVE 
MOVED EAST OF ALPINE...HOWEVER THE PUBLIC REPORTS SOME CREEKS AND 
STREAMS ARE OUT OF THEIR BANKS. ALSO FLOODING ALONG AND NEAR HIGHWAY 
67 NORTHEAST OF ALPINE IS POSSIBLE. THE STORMS WITH THE HEAVIEST 
RAIN ARE BETWEEN HIGHWAY 67 AND 385 AND NEAR MARATHON.

ALSO OF CONCERN IS THE POTENTIAL FOR STORMS WITH HEAVY RAIN IN NORTH 
JEFF DAVIS COUNTY TO MOVE SOUTHEAST INTO THE ALPINE AREA BY 1030 PM. 
IF THIS OCCURS THE FLASH FLOODING WARNING WILL LIKELY BE EXTENDED.

MOST FLOODING DEATHS ARE PREVENTABLE... AND MANY OCCUR WHEN MOTORISTS
DRIVE ACROSS FLOODED ROADWAYS. IT IS NEVER SAFE TO DRIVE ON FLOODED
ROADS. IT TAKES ONLY A FEW INCHES OF RAPIDLY FLOWING WATER TO QUICKLY
CARRY AWAY YOUR VEHICLE. TURN AROUND... DONT DROWN.

IN HILLY TERRAIN THERE ARE MANY LOW WATER CROSSINGS WHICH ARE 
POTENTIALLY DANGEROUS IN HEAVY RAIN. 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 3056 10379 3075 10359 3029 10294 2985 10344
      2985 10377

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 18, 8:04 PM CDTAreal Flood AdvisoryMAFBrewster, Jeff Davis, Presidio3 hr
Aug 18, 8:47 PM CDTFlash Flood WarningMAFJeff Davis3 hr
Aug 18, 9:14 PM CDTAreal Flood AdvisoryMAFReeves3 hr
Aug 18, 9:29 PM CDTSevere Thunderstorm WarningMAFBorden, Mitchell, Scurry46 min
Aug 18, 10:20 PM CDTAreal Flood AdvisoryMAFPecos3 hr
Aug 18, 10:25 PM CDTFlash Flood WarningMAFBrewster, Jeff Davis110 min
Aug 19, 1:35 AM CDTSevere Thunderstorm WarningMAFReeves36 min

Nearby

Flash Flood Warnings in Texas, 2008Every 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.