Alert archive / Texas / Tornado Warnings in 2011

Tornado Warning 9, NWS Midland/Odessa, TX

September 16, 2011Pecos County, Texas

NWS Midland/Odessa, TX issued this tornado warning at Sep 16, 2011, 5:13 PM CDT for Pecos County, Texas. It was in force for 32 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 16, 2011, 5:13 PM CDT (22:13 UTC)
Expired
Sep 16, 2011, 5:45 PM CDT
In force
32 min
Issued by
NWS Midland/Odessa, TX
Area
Storm-based polygon

County Pecos County, TX

The radar

The Midland/Odessa radar (KMAF), 175 km from the middle of the area, began a volume at 22:13 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 12:00Z, 10.2 hours before the alert went out and 175 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 2011-09-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 272 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 12:00Z on 2011-09-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 112 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
272 J/kg
Mixed-layer CIN
-83 J/kg
Mixed-layer LCL
722 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
112 m²/s²
0-3 km storm-relative helicity
192 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.1

Open this sounding in Storm Lab

The text

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

267 
WFUS54 KMAF 162213
TORMAF
TXC371-162245-
/O.NEW.KMAF.TO.W.0009.110916T2213Z-110916T2245Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MIDLAND/ODESSA TX
513 PM CDT FRI SEP 16 2011

THE NATIONAL WEATHER SERVICE IN MIDLAND HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEAST PECOS COUNTY IN SOUTHWEST TEXAS...

* UNTIL 545 PM CDT

* AT 508 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO OVER EXTREME
  SOUTHWEST PECOS COUNTY...OR 27 MILES EAST OF FORT DAVIS...MOVING
  SOUTHEAST AT 10 MPH.

* THE TORNADO WILL AFFECT THE FOLLOWING LOCATIONS...
  OPEN COUNTRY OF SOUTHWESTERN PECOS COUNTY...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO MAY FORM AT ANY TIME... TAKE COVER NOW. ABANDON MOBILE
HOMES AND VEHICLES FOR MORE SUBSTANTIAL SHELTER. AVOID WINDOWS.

IF YOU ARE CAUGHT OUTSIDE... SEEK SHELTER IN A NEARBY REINFORCED
BUILDING. AS A LAST RESORT... SEEK SHELTER IN A CULVERT... DITCH OR
LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

&&

LAT...LON 3085 10343 3078 10318 3072 10321 3060 10333
      3065 10341 3069 10346 3077 10357
TIME...MOT...LOC 2212Z 267DEG 8KT 3074 10347

$$
1 follow-up statement
976 
WWUS54 KMAF 162222
SVSMAF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIDLAND/ODESSA TX
522 PM CDT FRI SEP 16 2011

TXC371-162245-
/O.CON.KMAF.TO.W.0009.000000T0000Z-110916T2245Z/
PECOS TX-
522 PM CDT FRI SEP 16 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 545 PM CDT FOR SOUTHWEST
PECOS COUNTY...

AT 518 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
DETECT A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO OVER 
EXTREME SOUTHWEST PECOS COUNTY...OR 27 MILES EAST OF FORT DAVIS...
MOVING SOUTHEAST AT 10 MPH.

SOME LOCATIONS AFFECTED BY THE TORNADO INCLUDE...OPEN COUNTRY OF
EXTREME SOUTHWEST CENTRAL PECOS COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO MAY FORM AT ANY TIME... TAKE COVER NOW. ABANDON MOBILE
HOMES AND VEHICLES FOR MORE SUBSTANTIAL SHELTER. AVOID WINDOWS.

IN ADDITION TENNIS BALL SIZE HAIL IS LIKELY WITH THIS STORM.

IF YOU ARE CAUGHT OUTSIDE... SEEK SHELTER IN A NEARBY REINFORCED
BUILDING. AS A LAST RESORT... SEEK SHELTER IN A CULVERT... DITCH OR
LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

&&

LAT...LON 3085 10343 3078 10318 3072 10321 3060 10333
      3065 10341 3069 10346 3077 10357
TIME...MOT...LOC 2220Z 267DEG 8KT 3072 10343

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 15, 9:18 PM CDTSevere Thunderstorm WarningMAFJeff Davis43 min
Sep 16, 4:50 PM CDTSevere Thunderstorm WarningMAFPecos55 min
Sep 16, 5:44 PM CDTTornado WarningMAFBrewster, Jeff Davis, Pecos61 min
Sep 16, 6:46 PM CDTSevere Thunderstorm WarningMAFBrewster, Pecos59 min

Nearby

Tornado Warnings in Texas, 2011Every tornado warning in 2011Tornadoes 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.