Alert archive / Texas / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 77, NWS Midland/Odessa, TX

September 15, 2011Jeff Davis County, Texas

NWS Midland/Odessa, TX issued this severe thunderstorm warning at Sep 15, 2011, 9:18 PM CDT for Jeff Davis County, Texas. It was in force for 43 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
Sep 15, 2011, 9:18 PM CDT (02:18 UTC)
Expired
Sep 15, 2011, 10:01 PM CDT
In force
43 min
Issued by
NWS Midland/Odessa, TX
Area
Storm-based polygon

County Jeff Davis County, TX

The radar

The Midland/Odessa radar (KMAF), 233 km from the middle of the area, began a volume at 02:21 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, 2.3 hours before the alert went out and 233 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 2011-09-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2 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 2011-09-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 195 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
2 J/kg
Mixed-layer CIN
-237 J/kg
Mixed-layer LCL
810 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
195 m²/s²
0-3 km storm-relative helicity
178 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

Open this sounding in Storm Lab

The text

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

044 
WUUS54 KMAF 160218
SVRMAF
TXC243-160315-
/O.NEW.KMAF.SV.W.0077.110916T0218Z-110916T0315Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MIDLAND/ODESSA TX
918 PM CDT THU SEP 15 2011

THE NATIONAL WEATHER SERVICE IN MIDLAND HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL JEFF DAVIS COUNTY IN SOUTHWEST TEXAS...

* UNTIL 1015 PM CDT

* AT 912 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED OVER
  WEST CENTRAL JEFF DAVIS COUNTY...OR 30 MILES SOUTHEAST OF VAN      
  HORN...MOVING NORTHEAST AT 30 MPH. THIS STORM WILL AFFECT ALFRED   
  MEANS RANCH ROAD...10 MILES NORTH OF VALENTINE.

* THE SEVERE THUNDERSTORM WILL AFFECT THE FOLLOWING LOCATIONS...
  CENTRAL JEFF DAVIS COUNTY...
  NORTHERN JEFF DAVIS COUNTY...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE 
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL AND DEADLY CLOUD 
TO GROUND LIGHTNING.  PEOPLE OUTSIDE SHOULD MOVE TO SHELTER... 
PREFERABLY INSIDE A STRONG BUILDING AWAY FROM WINDOWS.

&&

LAT...LON 3096 10436 3105 10421 3103 10406 3076 10393
      3060 10454 3072 10464
TIME...MOT...LOC 0217Z 220DEG 24KT 3073 10449

$$
2 follow-up statements
456 
WWUS54 KMAF 160245
SVSMAF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIDLAND/ODESSA TX
945 PM CDT THU SEP 15 2011

TXC243-160315-
/O.CON.KMAF.SV.W.0077.000000T0000Z-110916T0315Z/
JEFF DAVIS TX-
945 PM CDT THU SEP 15 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1015 PM CDT
FOR CENTRAL JEFF DAVIS COUNTY...

AT 940 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
DETECT A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED OVER CENTRAL JEFF DAVIS COUNTY...OR ABOUT 29 MILES SOUTHEAST 
OF VAN HORN...MOVING NORTHEAST AT 20 MPH. 

SOME LOCATIONS AFFECTED BY THE SEVERE THUNDERSTORM INCLUDE...CENTRAL
JEFF DAVIS COUNTY AND NORTH CENTRAL JEFF DAVIS COUNTY.

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.

&&

LAT...LON 3096 10436 3105 10421 3103 10406 3076 10393
      3060 10454 3072 10464
TIME...MOT...LOC 0244Z 225DEG 18KT 3083 10440

$$
263 
WWUS54 KMAF 160301
SVSMAF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIDLAND/ODESSA TX
1001 PM CDT THU SEP 15 2011

TXC243-160311-
/O.CAN.KMAF.SV.W.0077.000000T0000Z-110916T0315Z/
JEFF DAVIS TX-
1001 PM CDT THU SEP 15 2011

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL JEFF DAVIS COUNTY IS
CANCELLED...

AT 1001 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THAT THE STORM THAT PROMPTED THE SEVERE THUNDERSTORM WARNING HAD
WEAKENED. THEREFORE THE SEVERE THUNDERSTORM WARNING IS CANCELLED.

LAT...LON 3096 10436 3105 10421 3103 10406 3076 10393
      3060 10454 3072 10464
TIME...MOT...LOC 0301Z 225DEG 18KT 3088 10434

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 16, 4:50 PM CDTSevere Thunderstorm WarningMAFPecos55 min
Sep 16, 5:13 PM CDTTornado WarningMAFPecos32 min
Sep 16, 5:44 PM CDTTornado WarningMAFBrewster, Jeff Davis, Pecos61 min
Sep 16, 6:46 PM CDTSevere Thunderstorm WarningMAFBrewster, Pecos59 min

Nearby

Severe Thunderstorm Warnings in Texas, 2011Every severe thunderstorm warning in 2011

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.