Alert archive / Texas / Tornado Watches in 2015

Tornado Watch 95

April 22, 201542 counties in Texas

The Storm Prediction Center issued this tornado watch at Apr 22, 2015, 2:56 PM CDT for 42 counties in Texas. It was in force for 9 hr.

The area

The outline as issued.

The facts

Issued
Apr 22, 2015, 2:56 PM CDT (19:56 UTC)
Expired
Apr 23, 2015, 12:00 AM CDT
In force
9 hr
Issued by
the Storm Prediction Center
Largest hail expected
3 in
Strongest gust expected
60 kt
All 42 counties

Archer County, TX, Armstrong County, TX, Bailey County, TX, Baylor County, TX, Briscoe County, TX, Callahan County, TX, Carson County, TX, Castro County, TX, Childress County, TX, Clay County, TX, Collingsworth County, TX, Cottle County, TX, Crosby County, TX, Deaf Smith County, TX, Dickens County, TX, Donley County, TX, Fisher County, TX, Floyd County, TX, Foard County, TX, Hale County, TX, Hall County, TX, Hardeman County, TX, Haskell County, TX, Jones County, TX, Kent County, TX, King County, TX, Knox County, TX, Lamb County, TX, Lubbock County, TX, Motley County, TX, Nolan County, TX, Oldham County, TX, Parmer County, TX, Potter County, TX, Randall County, TX, Shackelford County, TX, Stonewall County, TX, Swisher County, TX, Taylor County, TX, Throckmorton County, TX, Wichita County, TX, Wilbarger County, TX

The radar

The Lubbock radar (KLBB), 84 km from the middle of the area, began a volume at 19:57 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
50%
One or more EF2 to EF5 tornadoes
20%
Ten or more severe wind reports
70%
One or more gusts of 65 knots or more
20%
Ten or more severe hail reports
90%
One or more hailstones of 2 inches or more
70%
Six or more combined severe hail and wind reports
95%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Apr 22, 3:09 PM CDTSevere Thunderstorm WarningAMADeaf Smith51 min
Apr 22, 3:59 PM CDTSevere Thunderstorm WarningAMADeaf Smith46 min
Apr 22, 4:44 PM CDTSevere Thunderstorm WarningAMADeaf Smith61 min
Apr 22, 5:20 PM CDTTornado WarningAMADeaf Smith, Randall40 min
Apr 22, 5:40 PM CDTSevere Thunderstorm WarningLUBCastro, Swisher50 min
Apr 22, 5:51 PM CDTTornado WarningAMADeaf Smith, Randall34 min
Apr 22, 5:59 PM CDTSevere Thunderstorm WarningAMADeaf Smith, Randall38 min
Apr 22, 6:26 PM CDTSevere Thunderstorm WarningAMAArmstrong, Randall61 min
Apr 22, 6:28 PM CDTSevere Thunderstorm WarningLUBCastro, Swisher62 min
Apr 22, 6:29 PM CDTTornado WarningSJTFisher, Nolan31 min
Apr 22, 6:58 PM CDTTornado WarningSJTFisher, Nolan32 min
Apr 22, 7:05 PM CDTSevere Thunderstorm WarningLUBFloyd, Hale40 min
Apr 22, 7:06 PM CDTSevere Thunderstorm WarningLUBBriscoe, Floyd, Hall, Swisher39 min
Apr 22, 7:18 PM CDTTornado WarningSJTNolan, Taylor27 min
Apr 22, 7:42 PM CDTSevere Thunderstorm WarningLUBBriscoe, Floyd, Hall, Motley48 min
Apr 22, 7:44 PM CDTTornado WarningSJTNolan, Taylor31 min
Apr 22, 7:46 PM CDTSevere Thunderstorm WarningLUBFloyd, Hale44 min
Apr 22, 7:55 PM CDTTornado WarningLUBFloyd, Hale35 min
Apr 22, 8:13 PM CDTSevere Thunderstorm WarningSJTCallahan, Runnels, Taylor47 min
Apr 22, 8:25 PM CDTSevere Thunderstorm WarningLUBCottle, Dickens, King, Motley50 min
Apr 22, 8:30 PM CDTSevere Thunderstorm WarningLUBFloyd30 min
Apr 22, 9:00 PM CDTSevere Thunderstorm WarningLUBFloyd30 min
Apr 22, 9:09 PM CDTSevere Thunderstorm WarningLUBCottle, Dickens, King, Motley51 min
Apr 22, 9:11 PM CDTSevere Thunderstorm WarningOUNFoard, Knox79 min
Apr 22, 9:33 PM CDTTornado WarningOUNKnox42 min
Apr 22, 9:51 PM CDTSevere Thunderstorm WarningLUBDickens, King, Stonewall39 min
Apr 22, 10:06 PM CDTSevere Thunderstorm WarningSJTHaskell, Throckmorton39 min
Apr 22, 10:12 PM CDTTornado Warning Tornado observedOUNBaylor, Knox48 min
Apr 22, 10:16 PM CDTTornado WarningSJTHaskell, Throckmorton29 min
Apr 22, 10:29 PM CDTSevere Thunderstorm WarningLUBKing, Stonewall46 min
Apr 22, 10:47 PM CDTSevere Thunderstorm WarningSJTHaskell, Throckmorton43 min
Apr 22, 10:51 PM CDTTornado WarningSJTHaskell, Throckmorton24 min
Apr 22, 11:05 PM CDTSevere Thunderstorm WarningSJTHaskell40 min
Apr 22, 11:09 PM CDTSevere Thunderstorm WarningSJTThrockmorton51 min
Apr 22, 11:15 PM CDTTornado WarningSJTHaskell, Throckmorton30 min
Apr 22, 11:45 PM CDTSevere Thunderstorm WarningSJTHaskell, Jones, Shackelford, Throckmorton45 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, 7.9 hours before the alert went out and 116 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 2015-04-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 10 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 2015-04-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -146 square meters per square second.1939587897Sfc1 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
10 J/kg
Mixed-layer CIN
-339 J/kg
Mixed-layer LCL
2161 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
-146 m²/s²
0-3 km storm-relative helicity
-127 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.

923 
WWUS20 KWNS 221954
SEL5  
SPC WW 221954
OKZ000-TXZ000-230300-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 95
NWS STORM PREDICTION CENTER NORMAN OK
255 PM CDT WED APR 22 2015

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* TORNADO WATCH FOR PORTIONS OF 
  SOUTHWEST OKLAHOMA
  WEST AND WESTERN NORTH TEXAS

* EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 255 PM
  UNTIL 1000 PM CDT.

* PRIMARY THREATS INCLUDE...
  A FEW TORNADOES POSSIBLE
  WIDESPREAD LARGE HAIL AND ISOLATED VERY LARGE HAIL EVENTS TO 3
    INCHES IN DIAMETER LIKELY
  SCATTERED DAMAGING WIND GUSTS TO 70 MPH LIKELY

SUMMARY...SCATTERED THUNDERSTORMS ARE BEGINNING TO DEVELOP WEST OF
AMARILLO.  THESE STORMS WILL TRACK EAST-SOUTHEASTWARD THROUGH THE
AFTERNOON AND EVENING INTO AN AREA OF INCREASINGLY MOIST/UNSTABLE
AIR.  SUPERCELLS CAPABLE OF VERY LARGE HAIL...DAMAGING WINDS...AND A
FEW TORNADOES ARE EXPECTED.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 60 STATUTE
MILES NORTH AND SOUTH OF A LINE FROM 85 MILES WEST NORTHWEST OF
PLAINVIEW TEXAS TO 50 MILES SOUTH OF WICHITA FALLS TEXAS.  FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU5).

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 94...

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 28030.


...HART

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 22, 2:55 AM CDTMesoscale DiscussionSPCHemphill, Wheeler3 hr
Apr 22, 10:43 AM CDTMesoscale DiscussionSPCAransas, Atascosa, Austin, Bandera, Bastrop, Bee and 36 more2 hr
Apr 22, 11:13 AM CDTTornado WatchSPCAransas, Bee, Calhoun, Duval, Goliad, Jim Wells and 7 more7 hr
Apr 22, 12:07 PM CDTMesoscale DiscussionSPCJim Wells, Nueces83 min
Apr 22, 1:43 PM CDTMesoscale DiscussionSPCAtascosa, Austin, Bandera, Bastrop, Bexar, Caldwell and 15 more92 min
Apr 22, 2:07 PM CDTMesoscale DiscussionSPCArcher, Armstrong, Baylor, Briscoe, Castro, Childress and 25 more2 hr
Apr 22, 2:29 PM CDTMesoscale DiscussionSPCAransas, Bee, Calhoun, Duval, Goliad, Jim Wells and 5 more61 min
Apr 22, 5:48 PM CDTMesoscale DiscussionSPCBosque, Comanche, Coryell, Ellis, Erath, Hamilton and 8 more117 min
Apr 22, 6:45 PM CDTMesoscale DiscussionSPCArcher, Armstrong, Baylor, Briscoe, Carson, Castro and 29 more2 hr

Nearby

Tornado Watches in Texas, 2015Every tornado watch in 2015

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.