Alert archive / Texas / Tornado Watches in 2021

Tornado Watch 211

May 26, 20219 counties in Oklahoma; 26 counties in Texas

The Storm Prediction Center issued this tornado watch at May 26, 2021, 5:13 PM CDT for 9 counties in Oklahoma; 26 counties in Texas. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
May 26, 2021, 5:13 PM CDT (22:13 UTC)
Expired
May 27, 2021, 12:00 AM CDT
In force
7 hr
Issued by
the Storm Prediction Center
Largest hail expected
3.5 in
Strongest gust expected
60 kt
All 35 counties

Alfalfa County, OK, Beaver County, OK, Ellis County, OK, Grant County, OK, Harper County, OK, Major County, OK, Texas County, OK, Woods County, OK, Woodward County, OK, Armstrong County, TX, Bailey County, TX, Briscoe County, TX, Carson County, TX, Castro County, TX, Collingsworth County, TX, Deaf Smith County, TX, Donley County, TX, Floyd County, TX, Gray County, TX, Hale County, TX, Hall County, TX, Hansford County, TX, Hemphill County, TX, Hutchinson County, TX, Lamb County, TX, Lipscomb County, TX, Moore County, TX, Ochiltree County, TX, Parmer County, TX, Potter County, TX, Randall County, TX, Roberts County, TX, Sherman County, TX, Swisher County, TX, Wheeler County, TX

The radar

The Amarillo radar (KAMA), 18 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.

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
50%
One or more gusts of 65 knots or more
20%
Ten or more severe hail reports
60%
One or more hailstones of 2 inches or more
60%
Six or more combined severe hail and wind reports
90%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
May 26, 5:38 PM CDTTornado WarningAMAHansford52 min
May 26, 5:43 PM CDTSevere Thunderstorm WarningAMACarson, Hutchinson, Potter62 min
May 26, 5:56 PM CDTSevere Thunderstorm WarningLUBCastro, Lamb, Swisher64 min
May 26, 6:11 PM CDTSevere Thunderstorm WarningAMAArmstrong, Randall49 min
May 26, 6:17 PM CDTSevere Thunderstorm WarningLUBBriscoe, Castro, Floyd, Hale, Lamb, Swisher58 min
May 26, 6:24 PM CDTTornado Warning Tornado observedAMAHansford51 min
May 26, 6:35 PM CDTSevere Thunderstorm WarningAMABeaver, Texas70 min
May 26, 6:37 PM CDTSevere Thunderstorm WarningAMAOchiltree53 min
May 26, 6:42 PM CDTSevere Thunderstorm WarningLUBBailey, Lamb33 min
May 26, 6:43 PM CDTSevere Thunderstorm WarningAMACarson, Gray, Hutchinson, Potter, Roberts62 min
May 26, 6:47 PM CDTSevere Thunderstorm WarningAMAArmstrong, Carson, Potter, Randall58 min
May 26, 6:58 PM CDTSevere Thunderstorm WarningAMABeaver62 min
May 26, 7:01 PM CDTTornado WarningAMAHansford, Ochiltree44 min
May 26, 7:01 PM CDTTornado WarningAMACarson44 min
May 26, 7:15 PM CDTSevere Thunderstorm WarningLUBBriscoe, Castro, Floyd, Hale, Lamb, Swisher45 min
May 26, 7:33 PM CDTSevere Thunderstorm WarningAMABeaver57 min
May 26, 7:39 PM CDTTornado Warning Tornado observedAMAHansford, Ochiltree51 min
May 26, 7:40 PM CDTTornado WarningAMACarson, Gray, Hutchinson, Roberts50 min
May 26, 7:56 PM CDTSevere Thunderstorm WarningLUBBriscoe, Castro, Floyd, Hale, Lamb, Swisher64 min
May 26, 8:07 PM CDTTornado WarningAMALipscomb, Ochiltree38 min
May 26, 8:10 PM CDTSevere Thunderstorm WarningLUBBailey, Castro, Lamb, Parmer50 min
May 26, 8:13 PM CDTSevere Thunderstorm WarningOUNHarper47 min
May 26, 8:25 PM CDTSevere Thunderstorm WarningAMACarson, Gray, Hutchinson, Roberts65 min
May 26, 8:31 PM CDTSevere Thunderstorm WarningAMABeaver59 min
May 26, 8:31 PM CDTSevere Thunderstorm WarningLUBCastro, Parmer59 min
May 26, 8:42 PM CDTSevere Thunderstorm WarningAMABeaver39 min
May 26, 8:44 PM CDTTornado WarningLUBHale, Lamb31 min
May 26, 8:51 PM CDTSevere Thunderstorm WarningOUNHarper, Woods, Woodward39 min
May 26, 8:57 PM CDTSevere Thunderstorm WarningAMABeaver33 min
May 26, 9:05 PM CDTSevere Thunderstorm WarningLUBCastro, Swisher30 min
May 26, 9:09 PM CDTSevere Thunderstorm WarningLUBHale, Lamb66 min
May 26, 9:11 PM CDTSevere Thunderstorm WarningAMAArmstrong, Deaf Smith, Randall43 min
May 26, 9:14 PM CDTSevere Thunderstorm WarningLUBCastro, Hale, Lamb, Swisher61 min
May 26, 9:16 PM CDTSevere Thunderstorm WarningOUNHarper, Woods, Woodward44 min
May 26, 9:30 PM CDTTornado WarningLUBHale30 min
May 26, 9:43 PM CDTSevere Thunderstorm WarningLUBLamb32 min
May 26, 9:56 PM CDTSevere Thunderstorm WarningOUNAlfalfa, Ellis, Harper, Woods, Woodward49 min
May 26, 9:59 PM CDTTornado WarningLUBHale31 min
May 26, 10:04 PM CDTSevere Thunderstorm WarningLUBCastro, Hale, Lamb, Swisher56 min
May 26, 10:20 PM CDTSevere Thunderstorm WarningLUBHale, Hockley, Lamb, Lubbock25 min
May 26, 10:31 PM CDTSevere Thunderstorm WarningLUBBriscoe, Swisher28 min
May 26, 10:41 PM CDTSevere Thunderstorm WarningOUNAlfalfa, Grant, Woods, Woodward49 min
May 26, 11:24 PM CDTSevere Thunderstorm WarningOUNGrant, Kay51 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, 10.2 hours before the alert went out and 17 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 2021-05-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1081 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, Amarillo Airport, TX at 12:00Z on 2021-05-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 184 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
1081 J/kg
Mixed-layer CIN
-237 J/kg
Mixed-layer LCL
1626 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
184 m²/s²
0-3 km storm-relative helicity
192 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.0

Open this sounding in Storm Lab

The text

As transmitted.

575 
WWUS20 KWNS 262211
SEL1  
SPC WW 262211
OKZ000-TXZ000-270500-

URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 211
NWS Storm Prediction Center Norman OK
515 PM CDT Wed May 26 2021

The NWS Storm Prediction Center has issued a

* Tornado Watch for portions of 
  Northwestern Oklahoma and central/eastern Oklahoma Panhandle
  Texas Panhandle

* Effective this Wednesday afternoon from 515 PM until Midnight
  CDT.

* Primary threats include...
  A few tornadoes possible
  Scattered large hail and isolated very large hail events to 3.5
    inches in diameter likely
  Scattered damaging wind gusts to 70 mph possible

SUMMARY...Scattered thunderstorms, including a few supercells, will
pose a threat for a couple tornadoes, along with very large hail and
isolated damaging gusts through this evening.

The tornado watch area is approximately along and 60 statute miles
east and west of a line from 25 miles southwest of Plainview TX to
75 miles east northeast of Guymon OK. For a complete depiction of
the watch see the associated watch outline update (WOUS64 KWNS
WOU1).

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 205...WW 206...WW
207...WW 208...WW 209...WW 210...

AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 3.5 inches. Extreme turbulence and surface wind
gusts to 60 knots. A few cumulonimbi with maximum tops to 600. Mean
storm motion vector 23025.

...Edwards

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 25, 10:10 PM CDTMesoscale DiscussionSPCHarmon65 min
May 26, 12:43 AM CDTMesoscale DiscussionSPCGreer, Harmon, Jackson, Tillman92 min
May 26, 3:24 PM CDTMesoscale DiscussionSPCBeaver, Beckham, Ellis, Roger Mills, Texas, Woodward96 min
May 25, 7:21 PM CDTMesoscale DiscussionSPCArmstrong, Borden, Briscoe, Carson, Childress, Coke and 33 more84 min

Nearby

Tornado Watches in Texas, 2021Tornado Watches in Oklahoma, 2021Every tornado watch in 2021

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.