Alert archive / Texas / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 13, NWS Midland/Odessa, TX

April 11, 2009Dawson County, Gaines County, Texas

NWS Midland/Odessa, TX issued this severe thunderstorm warning at Apr 11, 2009, 5:58 PM CDT for Dawson County, Gaines County, Texas. It was in force for 62 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
Apr 11, 2009, 5:58 PM CDT (22:58 UTC)
Expired
Apr 11, 2009, 7:00 PM CDT
In force
62 min
Issued by
NWS Midland/Odessa, TX
Area
Storm-based polygon

Counties Dawson County, TX, Gaines County, TX

The radar

The Midland/Odessa radar (KMAF), 95 km from the middle of the area, began a volume at 23:00 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Apr 11, 3:18 PM CDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Midland Regional, TX (KMAF), launched 12:00Z, 11.0 hours before the alert went out and 94 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 12:00Z on 2009-04-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 12:00Z on 2009-04-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 514 square meters per square second.1939587897Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1657 m above ground
0-6 km bulk shear
60 kt
0-1 km storm-relative helicity
514 m²/s²
0-3 km storm-relative helicity
417 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KMAF 112258
SVRMAF
TXC115-165-120000-
/O.NEW.KMAF.SV.W.0013.090411T2258Z-090412T0000Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIDLAND/ODESSA TX
558 PM CDT SAT APR 11 2009

THE NATIONAL WEATHER SERVICE IN MIDLAND HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN GAINES COUNTY IN WEST TEXAS...
  EXTREME NORTHWESTERN DAWSON COUNTY IN WEST TEXAS...

* UNTIL 700 PM CDT

* AT 555 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING GOLF BALL SIZE 
  HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH. THIS LINE OF STORMS
  STRETCHED FROM 5 MILES WEST OF SEAGRAVES TO 8 MILES WEST OF 
  SEMINOLE... MOVING NORTHEAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL AFFECT THE FOLLOWING LOCATIONS...
  SEMINOLE...
  SEAGRAVES...
  LOOP...
  ASHMORE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS... DEADLY CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. REMEMBER...IF YOU CAN
HEAR THUNDER... YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. SEEK
SAFE SHELTER NOW.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT
SATURDAY EVENING FOR SOUTHEAST NEW MEXICO AND SOUTHWESTERN TEXAS.

&&

LAT...LON 3258 10244 3252 10268 3295 10261 3296 10260
      3295 10217
TIME...MOT...LOC 2256Z 230DEG 28KT 3271 10279

$$
1 follow-up statement
000 
WWUS54 KMAF 112351
SVSMAF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIDLAND/ODESSA TX
651 PM CDT SAT APR 11 2009

TXC115-165-120000-
/O.CON.KMAF.SV.W.0013.000000T0000Z-090412T0000Z/
GAINES TX-DAWSON TX-
651 PM CDT SAT APR 11 2009

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM CDT
FOR EXTREME NORTHWESTERN DAWSON AND EASTERN GAINES COUNTIES...

AT 640 PM CDT DOPPLER RADAR INDICATED A LARGE AREA OF SEVERE 
THUNDERSTORMS COVERING THE EASTERN HALF OF GAINES COUNTY FROM
NEAR ASHMORE TO CEDAR LAKE TO 10 MILES SOUTH OF HIGHWAY 180.
THESE STORMS WERE MOVING TO THE NORTHEAST AT 30 MPH.

SOME LOCATIONS AFFECTED BY THE SEVERE THUNDERSTORM INCLUDE...
ASHMORE...CEDAR LAKE...SAND...PUNKIN CENTER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS... DEADLY CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. REMEMBER... IF YOU CAN
HEAR THUNDER... YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. SEEK
SAFE SHELTER NOW.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT
SATURDAY EVENING FOR SOUTHEAST NEW MEXICO AND SOUTHWESTERN TEXAS.

&&

LAT...LON 3258 10244 3252 10268 3295 10261 3296 10260
      3295 10217
TIME...MOT...LOC 2349Z 230DEG 28KT 3297 10241

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 11, 11:50 AM CDTWind AdvisoryMAFBorden, Crane, Ector, Glasscock, Howard, Martin and 9 more7 hr
Apr 11, 2:33 PM CDTFire Weather WatchMAFPecos, Terrell15 hr
Apr 11, 3:56 PM CDTSevere Thunderstorm WarningMAFGaines49 min
Apr 11, 4:05 PM CDTHigh Wind WatchMAF14 hr
Apr 11, 4:41 PM CDTTornado WarningMAFGaines34 min
Apr 11, 5:12 PM CDTSevere Thunderstorm WarningMAFLoving, Reeves, Ward, Winkler63 min
Apr 11, 5:17 PM CDTSevere Thunderstorm WarningMAFAndrews, Ector, Gaines, Winkler43 min
Apr 11, 6:05 PM CDTSevere Thunderstorm WarningMAFAndrews, Gaines55 min
Apr 11, 6:11 PM CDTSevere Thunderstorm WarningMAFAndrews, Ector, Winkler34 min
Apr 11, 6:18 PM CDTSevere Thunderstorm WarningMAFCrane, Ector, Ward, Winkler57 min
Apr 11, 6:36 PM CDTSevere Thunderstorm WarningMAFDawson, Gaines54 min
Apr 11, 6:45 PM CDTSevere Thunderstorm WarningMAFAndrews, Crane, Dawson, Ector, Gaines, Martin and 1 more60 min
Apr 11, 6:46 PM CDTSevere Thunderstorm WarningMAFPecos, Reeves, Ward59 min
Apr 11, 6:49 PM CDTFlash Flood WarningMAFGaines3 hr

Nearby

Severe Thunderstorm Warnings in Texas, 2009Every severe thunderstorm warning in 2009

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.