Alert archive / Texas / Tornado Watches in 2016

Tornado Watch 257

June 14, 20167 counties in Oklahoma; 16 counties in Texas

The Storm Prediction Center issued this tornado watch at Jun 14, 2016, 5:51 PM CDT for 7 counties in Oklahoma; 16 counties in Texas. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued
Jun 14, 2016, 5:51 PM CDT (22:51 UTC)
Expired
Jun 14, 2016, 10:13 PM CDT
In force
4 hr
Issued by
the Storm Prediction Center
Largest hail expected
2.5 in
Strongest gust expected
60 kt
All 23 counties

Comanche County, OK, Cotton County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Kiowa County, OK, Tillman County, OK, Archer County, TX, Baylor County, TX, Briscoe County, TX, Childress County, TX, Cottle County, TX, Crosby County, TX, Dickens County, TX, Floyd County, TX, Foard County, TX, Hall County, TX, Hardeman County, TX, King County, TX, Knox County, TX, Motley County, TX, Wichita County, TX, Wilbarger County, TX

The radar

The Altus AFB radar (KFDR), 104 km from the middle of the area, began a volume at 22:51 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
30%
One or more gusts of 65 knots or more
10%
Ten or more severe hail reports
40%
One or more hailstones of 2 inches or more
30%
Six or more combined severe hail and wind reports
60%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jun 14, 6:25 PM CDTSevere Thunderstorm WarningLUBCottle, Motley50 min
Jun 14, 7:06 PM CDTSevere Thunderstorm WarningLUBCottle, King39 min
Jun 14, 7:20 PM CDTSevere Thunderstorm WarningLUBCottle, Motley25 min
Jun 14, 7:39 PM CDTSevere Thunderstorm WarningLUBCottle, King51 min
Jun 14, 8:19 PM CDTSevere Thunderstorm WarningOUNFoard, Knox41 min
Jun 14, 8:21 PM CDTSevere Thunderstorm WarningLUBCottle, King54 min
Jun 14, 8:57 PM CDTSevere Thunderstorm WarningOUNFoard, Knox48 min
Jun 14, 9:13 PM CDTSevere Thunderstorm WarningLUBCottle, King32 min
Jun 14, 9:16 PM CDTSevere Thunderstorm WarningOUNKnox44 min
Jun 14, 9:36 PM CDTSevere Thunderstorm WarningOUNKnox28 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, 10.9 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, Amarillo Airport, TX at 12:00Z on 2016-06-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 833 joules per kilogram.LCLLFCEL10008507005003002001001 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 2016-06-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 133 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
833 J/kg
Mixed-layer CIN
-91 J/kg
Mixed-layer LCL
613 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
133 m²/s²
0-3 km storm-relative helicity
128 m²/s²
Significant tornado parameter
0.5
Supercell composite
5.2

Open this sounding in Storm Lab

The text

As transmitted.

722 
WWUS20 KWNS 142248
SEL7  
SPC WW 142248
OKZ000-TXZ000-150600-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 257
NWS STORM PREDICTION CENTER NORMAN OK
550 PM CDT TUE JUN 14 2016

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* TORNADO WATCH FOR PORTIONS OF 
  SOUTHWEST OKLAHOMA
  EASTERN PARTS OF THE TEXAS SOUTH PLAINS AND WESTERN NORTH TEXAS

* EFFECTIVE THIS TUESDAY AFTERNOON AND WEDNESDAY MORNING FROM 550
  PM UNTIL 100 AM CDT.

* PRIMARY THREATS INCLUDE...
  A COUPLE TORNADOES POSSIBLE
  SCATTERED LARGE HAIL AND ISOLATED VERY LARGE HAIL EVENTS TO 2.5
    INCHES IN DIAMETER POSSIBLE
  ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE

SUMMARY...ISOLATED TO WIDELY SCATTERED THUNDERSTORMS...INCLUDING A
COUPLE SUPERCELLS CAPABLE OF LARGE HAIL...LOCALLY DAMAGING
WIND...AND TORNADOS...EXPECTED TO FORM/PERSIST OVER WATCH AREA
THROUGH LATE EVENING.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 50 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 60 MILES WEST SOUTHWEST OF
CHILDRESS TEXAS TO 20 MILES SOUTH OF FORT SILL OKLAHOMA.  FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU7).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 254...WW 255...WW 256...

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
550. MEAN STORM MOTION VECTOR 28020.


...CORFIDI

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 13, 8:25 PM CDTMesoscale DiscussionSPCBeaver95 min
Jun 13, 9:02 PM CDTMesoscale DiscussionSPCEllis, Harper, Roger Mills, Woodward88 min
Jun 13, 10:34 PM CDTMesoscale DiscussionSPCAlfalfa, Beckham, Blaine, Custer, Greer, Harmon and 3 more2 hr
Jun 13, 10:45 PM CDTMesoscale DiscussionSPCEllis, Harper, Roger Mills, Woodward90 min
Jun 14, 4:02 PM CDTMesoscale DiscussionSPCBeckham, Caddo, Carter, Comanche, Cotton, Greer and 7 more88 min
Jun 13, 10:56 PM CDTMesoscale DiscussionSPCDonley, Wheeler94 min
Jun 14, 5:31 PM CDTMesoscale DiscussionSPCCottle, Foard, Hardeman, Motley, Wilbarger59 min
Jun 14, 6:56 PM CDTMesoscale DiscussionSPCCottle, Foard, Hardeman94 min

Nearby

Tornado Watches in Texas, 2016Tornado Watches in Oklahoma, 2016Every tornado watch in 2016

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.