Alert archive / Texas / Tornado Watches in 2007

Tornado Watch 314

May 31, 20079 counties in New Mexico; 27 counties in Texas

The Storm Prediction Center issued this tornado watch at May 31, 2007, 3:45 PM MDT for 9 counties in New Mexico; 27 counties in Texas. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
May 31, 2007, 3:45 PM MDT (21:45 UTC)
Expired
May 31, 2007, 10:00 PM MDT
In force
6 hr
Issued by
the Storm Prediction Center
Largest hail expected
2.5 in
Strongest gust expected
60 kt
All 36 counties

Chaves County, NM, Curry County, NM, De Baca County, NM, Eddy County, NM, Guadalupe County, NM, Lea County, NM, Lincoln County, NM, Quay County, NM, Roosevelt County, NM, Andrews County, TX, Bailey County, TX, Borden County, TX, Briscoe County, TX, Castro County, TX, Childress County, TX, Cochran County, TX, Cottle County, TX, Crosby County, TX, Dawson County, TX, Dickens County, TX, Floyd County, TX, Gaines County, TX, Garza County, TX, Hale County, TX, Hall County, TX, Hockley County, TX, King County, TX, Lamb County, TX, Lubbock County, TX, Lynn County, TX, Martin County, TX, Motley County, TX, Parmer County, TX, Swisher County, TX, Terry County, TX, Yoakum County, TX

The radar

The Cannon AFB radar (KFDX), 72 km from the middle of the area, began a volume at 21:48 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.

What SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes
40%
One or more EF2 to EF5 tornadoes
20%
Ten or more severe wind reports
40%
One or more gusts of 65 knots or more
30%
Ten or more severe hail reports
60%
One or more hailstones of 2 inches or more
40%
Six or more combined severe hail and wind reports
90%

Warnings issued inside it

31 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
May 31, 3:56 PM MDTSevere Thunderstorm WarningABQChaves64 min
May 31, 4:38 PM MDTSevere Thunderstorm WarningLUBLamb67 min
May 31, 5:19 PM MDTSevere Thunderstorm WarningLUBHale56 min
May 31, 5:24 PM MDTSevere Thunderstorm WarningMAFLea28 min
May 31, 5:26 PM MDTSevere Thunderstorm WarningLUBSwisher64 min
May 31, 5:33 PM MDTSevere Thunderstorm WarningMAFLea57 min
May 31, 5:41 PM MDTSevere Thunderstorm WarningLUBLamb64 min
May 31, 6:07 PM MDTSevere Thunderstorm WarningLUBCochran53 min
May 31, 6:11 PM MDTSevere Thunderstorm WarningLUBHale64 min
May 31, 6:29 PM MDTSevere Thunderstorm WarningMAFLea46 min
May 31, 6:37 PM MDTSevere Thunderstorm WarningMAFEddy, Lea53 min
May 31, 6:41 PM MDTTornado WarningLUBCrosby, Floyd, Hale, Lubbock34 min
May 31, 6:44 PM MDTSevere Thunderstorm WarningLUBYoakum46 min
May 31, 6:50 PM MDTSevere Thunderstorm WarningLUBLamb55 min
May 31, 7:00 PM MDTSevere Thunderstorm WarningLUBCochran30 min
May 31, 7:15 PM MDTSevere Thunderstorm WarningLUBFloyd, Hale, Lubbock60 min
May 31, 7:15 PM MDTTornado WarningLUBCrosby45 min
May 31, 7:16 PM MDTSevere Thunderstorm WarningMAFLea59 min
May 31, 7:21 PM MDTTornado WarningLUBFloyd, Hale39 min
May 31, 7:21 PM MDTTornado WarningLUBFloyd, Hale39 min
May 31, 7:31 PM MDTSevere Thunderstorm WarningLUBYoakum59 min
May 31, 7:35 PM MDTFlash Flood WarningLUBFloyd, Hale115 min
May 31, 7:53 PM MDTTornado WarningLUBFloyd52 min
May 31, 7:56 PM MDTTornado WarningLUBHale34 min
May 31, 8:01 PM MDTSevere Thunderstorm WarningLUBTerry59 min
May 31, 8:12 PM MDTSevere Thunderstorm WarningLUBLubbock63 min
May 31, 8:30 PM MDTFlash Flood WarningLUBYoakum60 min
May 31, 8:30 PM MDTSevere Thunderstorm WarningLUBYoakum16 min
May 31, 8:39 PM MDTTornado WarningLUBFloyd36 min
May 31, 8:49 PM MDTSevere Thunderstorm WarningLUBCrosby56 min
May 31, 9:13 PM MDTSevere Thunderstorm WarningLUBMotley62 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 12:00Z, 9.8 hours before the alert went out and 211 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, Amarillo Airport, TX at 12:00Z on 2007-05-31Temperature 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°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Amarillo Airport, TX at 12:00Z on 2007-05-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 84 square meters per square second.193958Sfc1 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
1454 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
84 m²/s²
0-3 km storm-relative helicity
202 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.

000
WWUS20 KWNS 312145
SEL4  
SPC WW 312145
NMZ000-TXZ000-010400-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 314
NWS STORM PREDICTION CENTER NORMAN OK
445 PM CDT THU MAY 31 2007

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF 

       EASTERN NEW MEXICO
       WEST TEXAS

EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 445 PM UNTIL
1100 PM CDT.

TORNADOES...HAIL TO 2.5 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 115 STATUTE
MILES EAST AND WEST OF A LINE FROM 55 MILES NORTH NORTHEAST OF
CANNON AFB NEW MEXICO TO 25 MILES SOUTH OF HOBBS NEW MEXICO.  FOR
A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU4).

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS.

OTHER WATCH INFORMATION...CONTINUE...WW 312...WW 313...

DISCUSSION...SCATTERED THUNDERSTORMS ARE INCREASING ALONG THE
MOUNTAINS OF SOUTHEAST NM...AND ALONG WEAK BOUNDARY ACROSS WEST TX. 
ACTIVITY IS EXPECTED TO INCREASE IN AREAL COVERAGE THROUGH THE
AFTERNOON AND EVENING...SPREADING EASTWARD ACROSS WEST TX.  VERTICAL
SHEAR IS FAVORABLE FOR SUPERCELLS CAPABLE OF VERY LARGE HAIL AND
DAMAGING WINDS.  VERY UNSTABLE AIR MASS /MLCAPE VALUES OVER 3000
J/KG/ AND BACKED LOW LEVEL WINDS MAY ALSO RESULT IN ISOLATED
TORNADOES.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 26025.


...HART

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 31, 1:33 PM MDTMesoscale DiscussionSPCChaves, De Baca, Guadalupe, Harding, Lincoln, Mora and 2 more87 min
May 30, 6:27 PM MDTSevere Thunderstorm WatchSPCBrown, Burnet, Callahan, Coleman, Comanche, Concho and 21 more5 hr
May 31, 12:04 AM MDTMesoscale DiscussionSPCBell, Blanco, Bosque, Brown, Burnet, Comanche and 18 more116 min
May 31, 2:28 PM MDTMesoscale DiscussionSPCArmstrong, Briscoe, Carson, Castro, Collingsworth, Dallam and 21 more92 min
May 31, 2:29 PM MDTTornado WatchSPCArmstrong, Carson, Collingsworth, Dallam, Deaf Smith, Donley and 14 more7 hr

Nearby

Tornado Watches in Texas, 2007Tornado Watches in New Mexico, 2007Every tornado watch in 2007

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.