Alert archive / Texas / Severe Thunderstorm Watches in 2021

Severe Thunderstorm Watch 324

June 26, 20215 counties in New Mexico; 12 counties in Texas

The Storm Prediction Center issued this severe thunderstorm watch at Jun 26, 2021, 3:58 PM MDT for 5 counties in New Mexico; 12 counties in Texas. It was in force for 8 hr.

The area

The outline as issued.

The facts

Issued
Jun 26, 2021, 3:58 PM MDT (21:58 UTC)
Expired
Jun 27, 2021, 12:00 AM MDT
In force
8 hr
Issued by
the Storm Prediction Center
Largest hail expected
2 in
Strongest gust expected
60 kt

Counties Chaves County, NM, Curry County, NM, De Baca County, NM, Quay County, NM, Roosevelt County, NM, Bailey County, TX, Briscoe County, TX, Castro County, TX, Deaf Smith County, TX, Hale County, TX, Hall County, TX, Lamb County, TX, Oldham County, TX, Parmer County, TX, Potter County, TX, Randall County, TX, Swisher County, TX

The radar

The Cannon AFB radar (KFDX), 96 km from the middle of the area, began a volume at 22:02 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
10%
One or more EF2 to EF5 tornadoes
5%
Ten or more severe wind reports
30%
One or more gusts of 65 knots or more
10%
Ten or more severe hail reports
50%
One or more hailstones of 2 inches or more
30%
Six or more combined severe hail and wind reports
70%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jun 26, 4:07 PM MDTSevere Thunderstorm WarningABQCurry, Quay38 min
Jun 26, 4:27 PM MDTSevere Thunderstorm WarningABQQuay48 min
Jun 26, 4:31 PM MDTSevere Thunderstorm WarningAMADeaf Smith, Oldham89 min
Jun 26, 4:44 PM MDTSevere Thunderstorm WarningABQCurry, Quay61 min
Jun 26, 5:08 PM MDTSevere Thunderstorm WarningABQCurry, Roosevelt37 min
Jun 26, 5:25 PM MDTSevere Thunderstorm WarningABQChaves50 min
Jun 26, 5:43 PM MDTSevere Thunderstorm WarningABQCurry, Roosevelt47 min
Jun 26, 5:57 PM MDTSevere Thunderstorm WarningAMADeaf Smith, Randall93 min
Jun 26, 6:20 PM MDTTornado WarningABQRoosevelt25 min
Jun 26, 6:24 PM MDTSevere Thunderstorm WarningLUBBailey, Cochran, Hockley, Lamb66 min
Jun 26, 6:35 PM MDTSevere Thunderstorm WarningLUBBailey, Cochran55 min
Jun 26, 6:43 PM MDTSevere Thunderstorm WarningABQRoosevelt16 min
Jun 26, 7:19 PM MDTSevere Thunderstorm WarningLUBBailey, Cochran, Hockley, Lamb56 min
Jun 26, 8:03 PM MDTSevere Thunderstorm WarningLUBCastro, Hale, Hockley, Lamb, Lubbock, Swisher57 min
Jun 26, 8:57 PM MDTSevere Thunderstorm WarningLUBBriscoe, Crosby, Floyd, Garza, Hale, Lubbock and 2 more63 min
Jun 26, 9:57 PM MDTSevere Thunderstorm WarningLUBBriscoe, Crosby, Dickens, Floyd, Garza, Hall and 2 more48 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, 10.0 hours before the alert went out and 100 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 2021-06-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 377 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 2021-06-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 73 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
377 J/kg
Mixed-layer CIN
-28 J/kg
Mixed-layer LCL
524 m above ground
0-6 km bulk shear
57 kt
0-1 km storm-relative helicity
73 m²/s²
0-3 km storm-relative helicity
91 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.2

Open this sounding in Storm Lab

The text

As transmitted.

714 
WWUS20 KWNS 262156
SEL4  
SPC WW 262156
NMZ000-TXZ000-270400-

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 324
NWS Storm Prediction Center Norman OK
500 PM CDT Sat Jun 26 2021

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Eastern New Mexico
  Northwest Texas

* Effective this Saturday afternoon and evening from 500 PM until
  1100 PM CDT.

* Primary threats include...
  Scattered large hail and isolated very large hail events to 2
    inches in diameter possible
  Isolated damaging wind gusts to 70 mph possible

SUMMARY...Multiple storms including a few clusters will develop
east-southeastward from eastern New Mexico toward parts of the Texas
Panhandle and Texas South Plains. Large hail and severe-caliber wind
gusts are the primary hazards.

The severe thunderstorm watch area is approximately along and 75
statute miles east and west of a line from 40 miles northwest of
Amarillo TX to 45 miles east of Roswell NM. For a complete depiction
of the watch see the associated watch outline update (WOUS64 KWNS
WOU4).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER...A Severe Thunderstorm Watch means conditions are
favorable for 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. Severe thunderstorms can and occasionally do produce
tornadoes.

&&

OTHER WATCH INFORMATION...CONTINUE...WW 321...WW 322...WW 323...

AVIATION...A few severe thunderstorms with hail surface and aloft to
2 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 550. Mean storm motion vector
30020.

...Guyer

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 26, 2:27 PM MDTMesoscale DiscussionSPCCurry, Lea, Quay, Roosevelt2 hr
Jun 26, 2:48 PM MDTSevere Thunderstorm WatchSPCLea9 hr
Jun 26, 5:27 PM MDTMesoscale DiscussionSPCLea93 min
Jun 25, 7:49 PM MDTMesoscale DiscussionSPCChildress, Collingsworth, Hall86 min
Jun 25, 10:36 PM MDTMesoscale DiscussionSPCArmstrong, Carson, Castro, Donley, Gray, Hemphill and 3 more84 min
Jun 25, 10:59 PM MDTSevere Thunderstorm WatchSPCBriscoe, Childress, Collingsworth, Donley, Hall, Hardeman and 1 more5 hr
Jun 26, 12:53 AM MDTMesoscale DiscussionSPCBriscoe, Childress, Cottle, Hall, Hardeman, Wilbarger67 min
Jun 26, 11:59 AM MDTMesoscale DiscussionSPCArcher, Baylor, Childress, Cottle, Crosby, Dickens and 15 more2 hr

Nearby

Severe Thunderstorm Watches in Texas, 2021Severe Thunderstorm Watches in New Mexico, 2021Every severe thunderstorm 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.