Alert archive / Texas / Tornado Warnings in 2011

Tornado Warning 11, NWS Midland/Odessa, TX

November 8, 2011Howard County, Martin County, Texas

NWS Midland/Odessa, TX issued this tornado warning at Nov 8, 2011, 12:17 AM CST for Howard County, Martin County, Texas. It was in force for 28 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
Nov 8, 2011, 12:17 AM CST (06:17 UTC)
Expired
Nov 8, 2011, 12:45 AM CST
In force
28 min
Issued by
NWS Midland/Odessa, TX
Area
Storm-based polygon

Counties Howard County, TX, Martin County, TX

The radar

The Midland/Odessa radar (KMAF), 62 km from the middle of the area, began a volume at 06:19 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
Nov 7, 9:16 PM CSTTornado WatchSPC8 hr

The nearest sounding before it

Midland Regional, TX (KMAF), launched 00:00Z, 6.3 hours before the alert went out and 62 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 2011-11-08Temperature 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 00:00Z on 2011-11-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 44 square meters per square second.1939587897117Sfc1 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
4235 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
44 m²/s²
0-3 km storm-relative helicity
93 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.

279 
WFUS54 KMAF 080617
TORMAF
TXC227-317-080645-
/O.NEW.KMAF.TO.W.0011.111108T0617Z-111108T0645Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MIDLAND/ODESSA TX
1217 AM CST TUE NOV 8 2011

THE NATIONAL WEATHER SERVICE IN MIDLAND HAS ISSUED A

* TORNADO WARNING FOR...
  WESTERN HOWARD COUNTY IN WEST TEXAS...
  SOUTHEASTERN MARTIN COUNTY IN WEST TEXAS...

* UNTIL 1245 AM CST

* AT 1214 AM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR COURTNEY...
  OR NEAR STANTON...MOVING NORTHEAST AT 45 MPH. THE STRONGEST ROTATION
  ASSOCIATED WITH THIS STORM WAS 2 MILES NORTH OF STANTON NEAR STATE
  HIGHWAY 137.

* THE TORNADO WILL AFFECT THE FOLLOWING LOCATIONS...
  STANTON...
  LENORAH...
  KNOTT...
  BIG SPRING...
  FAIRVIEW...

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 TO THE TORNADO... THIS STORM IS CAPABLE OF PRODUCING
LARGE HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS. SEEK SAFE SHELTER
NOW.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 500 AM CST TUESDAY MORNING
FOR SOUTHWESTERN TEXAS.

&&

LAT...LON 3252 10171 3246 10148 3218 10139 3209 10194
      3219 10202
TIME...MOT...LOC 0615Z 239DEG 41KT 3218 10183

$$
1 follow-up statement
810 
WWUS54 KMAF 080642
SVSMAF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIDLAND/ODESSA TX
1242 AM CST TUE NOV 8 2011

TXC227-317-080650-
/O.EXP.KMAF.TO.W.0011.000000T0000Z-111108T0645Z/
HOWARD TX-MARTIN TX-
1242 AM CST TUE NOV 8 2011

...THE TORNADO WARNING FOR EASTERN MARTIN AND WESTERN HOWARD COUNTIES
WILL EXPIRE AT 1245 AM CST...

AT 1240 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THAT THE STORM THAT PROMPTED THE TORNADO WARNING HAD WEAKENING
ROTATION. THEREFORE THE TORNADO WARNING WILL BE ALLOWED TO EXPIRE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ALTHOUGH THE IMMEDIATE THREAT OF A TORNADO HAS PASSED...SEVERE
WEATHER WILL CONTINUE ACROSS THE REGION. MOTORISTS SHOULD REMAIN
CAUTIOUS AND BE PREPARED TO SLOW DOWN IF WATER IS ENCOUNTERED TO
PREVENT HYDROPLANING AND LOSS OF VEHICLE CONTROL.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 500 AM CST TUESDAY MORNING
FOR SOUTHWESTERN TEXAS.

&&

LAT...LON 3252 10171 3246 10148 3218 10139 3209 10194
      3219 10202
TIME...MOT...LOC 0640Z 239DEG 41KT 3233 10154

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Nov 7, 11:03 PM CSTSevere Thunderstorm WarningMAFAndrews, Ector, Martin, Midland42 min
Nov 7, 11:19 PM CSTSevere Thunderstorm WarningMAFAndrews, Dawson, Gaines, Martin56 min
Nov 7, 11:41 PM CSTSevere Thunderstorm WarningMAFAndrews, Ector, Martin, Midland64 min
Nov 8, 12:04 AM CSTAreal Flood AdvisoryMAFMidland3 hr
Nov 8, 12:38 AM CSTSevere Thunderstorm WarningMAFBorden, Howard, Martin, Mitchell, Scurry67 min
Nov 8, 12:49 AM CSTSevere Thunderstorm WarningMAFGlasscock, Reagan, Upton56 min
Nov 8, 1:01 AM CSTSevere Thunderstorm WarningMAFGlasscock, Howard, Martin, Midland, Mitchell59 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.