Alert archive / Texas / Severe Thunderstorm Watches in 2021
Severe Thunderstorm Watch 44
The Storm Prediction Center issued this severe thunderstorm watch at Mar 22, 2021, 2:31 PM CDT for 7 counties in Oklahoma; 24 counties in Texas. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 22, 2021, 2:31 PM CDT (19:31 UTC)
- Expired
- Mar 22, 2021, 7:00 PM CDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 65 kt
All 31 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, Callahan County, TX, Childress County, TX, Clay County, TX, Cottle County, TX, Dickens County, TX, Fisher County, TX, Foard County, TX, Hall County, TX, Hardeman County, TX, Haskell County, TX, Jones County, TX, Kent County, TX, King County, TX, Knox County, TX, Motley County, TX, Nolan County, TX, Shackelford County, TX, Stonewall County, TX, Taylor County, TX, Throckmorton County, TX, Wichita County, TX, Wilbarger County, TX
The radar
The Altus AFB radar (KFDR), 52 km from the middle of the area, began a volume at 19:29 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
- 20%
- One or more EF2 to EF5 tornadoes
- 5%
- Ten or more severe wind reports
- 70%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 50%
- One or more hailstones of 2 inches or more
- 20%
- Six or more combined severe hail and wind reports
- 95%
Warnings issued inside it
3 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 22, 2:35 PM CDT | Severe Thunderstorm Warning | LUB | Cottle, Dickens, King, Motley | 40 min |
| Mar 22, 3:11 PM CDT | Severe Thunderstorm Warning | LUB | Childress, Cottle, King | 27 min |
| Mar 22, 3:20 PM CDT | Severe Thunderstorm Warning | OUN | Beckham, Greer, Harmon, Jackson | 40 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
Fort Worth, TX (KFWD), launched 12:00Z, 7.5 hours before the alert went out and 208 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 820 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 222 m²/s²
- 0-3 km storm-relative helicity
- 272 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
343
WWUS20 KWNS 221929
SEL4
SPC WW 221929
OKZ000-TXZ000-230000-
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 44
NWS Storm Prediction Center Norman OK
230 PM CDT Mon Mar 22 2021
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Southwest Oklahoma
Western North Texas
* Effective this Monday afternoon and evening from 230 PM until
700 PM CDT.
* Primary threats include...
Scattered damaging winds likely with isolated significant gusts
to 75 mph possible
Scattered large hail events to 1 inch in diameter possible
A tornado or two possible
SUMMARY...A fast-moving cluster of thunderstorms over western North
Texas will race northeastward across the watch area this afternoon,
posing a risk of locally damaging wind gusts and hail.
The severe thunderstorm watch area is approximately along and 75
statute miles east and west of a line from 30 miles north of Altus
OK to 20 miles south southeast of Abilene TX. 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.
&&
AVIATION...A few severe thunderstorms with hail surface and aloft to
1 inch. Extreme turbulence and surface wind gusts to 65 knots. A few
cumulonimbi with maximum tops to 400. Mean storm motion vector
24035.
...HartSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 22, 5:25 PM CDT | Mesoscale Discussion | SPC | Caddo, Carter, Comanche, Cotton, Garvin, Grady and 12 more | 65 min |
| Mar 22, 12:01 PM CDT | Mesoscale Discussion | SPC | Armstrong, Borden, Briscoe, Childress, Collingsworth, Cottle and 20 more | 2 hr |
| Mar 22, 2:51 PM CDT | Mesoscale Discussion | SPC | Brown, Coke, Coleman, Comanche, Concho, Crockett and 14 more | 2 hr |
| Mar 22, 4:24 PM CDT | Mesoscale Discussion | SPC | Bailey, Cochran, Crosby, Garza, Hale, Hockley and 5 more | 66 min |
| Mar 22, 6:05 PM CDT | Severe Thunderstorm Watch | SPC | Anderson, Bell, Blanco, Bosque, Burnet, Collin and 43 more | 7 hr |
Nearby
Severe Thunderstorm Watches in Texas, 2021Severe Thunderstorm Watches in Oklahoma, 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.