Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 99, NWS Norman, OK

April 23, 2021Baylor County, Foard County, Wilbarger County, Texas

NWS Norman, OK issued this severe thunderstorm warning at Apr 23, 2021, 5:52 PM CDT for Baylor County, Foard County, Wilbarger County, Texas. It was in force for 38 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Apr 23, 2021, 5:52 PM CDT (22:52 UTC)
Expired: Apr 23, 2021, 6:30 PM CDT
In force: 38 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 4.0 in
Wind: 60.0 mph

Counties Baylor County, TX, Foard County, TX, Wilbarger County, TX

The radar

The Altus AFB radar (KFDR), 80 km from the middle of the area, began a volume at 22:54 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 23, 3:14 PM CDT	Tornado Watch	SPC	5 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 10.9 hours before the alert went out and 241 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 14 J/kg
Mixed-layer CIN: -89 J/kg
Mixed-layer LCL: 578 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 397 m²/s²
0-3 km storm-relative helicity: 249 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

124 
WUUS54 KOUN 232252
SVROUN
TXC023-155-487-232330-
/O.NEW.KOUN.SV.W.0099.210423T2252Z-210423T2330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Norman OK
552 PM CDT Fri Apr 23 2021

The National Weather Service in Norman has issued a

* Severe Thunderstorm Warning for...
  Southeastern Foard County in northern Texas...
  Southwestern Wilbarger County in northern Texas...
  Northwestern Baylor County in northern Texas...

* Until 630 PM CDT.

* At 551 PM CDT, a severe thunderstorm was located 6 miles southeast 
  of Crowell, moving east at 25 mph. Trained spotters have reported 
  hail up to softball size near Foard City.

  This is a very dangerous storm.

  HAZARD...Softball size hail and 60 mph wind gusts.

  SOURCE...Trained weather spotters.

  IMPACT...People and animals outdoors will be severely injured. 
           Expect shattered windows, extensive damage to roofs, 
           siding, and vehicles.

* Locations impacted include...
  Crowell, Thalia and northern Lake Kemp. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms.

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3406 9921 3379 9918 3379 9957 3380 9958
      3379 9958 3379 9960 3380 9963 3382 9964
      3381 9966 3383 9969 3382 9970 3380 9970
      3382 9972 3380 9972 3381 9974 3398 9975
TIME...MOT...LOC 2251Z 266DEG 23KT 3390 9966 

HAIL...4.00IN
WIND...60MPH
 
$$

Ware

The office that day

Everything else NWS Norman, OK issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 23, 1:58 PM CDT	Special Weather Statement	OUN	Clay	47 min
Apr 23, 4:44 PM CDT	Severe Thunderstorm Warning	OUN	Foard, Hardeman	46 min
Apr 23, 4:52 PM CDT	Special Weather Statement	OUN	Foard	38 min
Apr 23, 5:17 PM CDT	Severe Thunderstorm Warning	OUN	Foard, Knox	43 min
Apr 23, 5:23 PM CDT	Severe Thunderstorm Warning	OUN	Baylor, Knox	52 min
Apr 23, 5:28 PM CDT	Severe Thunderstorm Warning	OUN	Foard, Hardeman	47 min
Apr 23, 5:40 PM CDT	Tornado Warning	OUN	Foard, Hardeman	39 min
Apr 23, 5:59 PM CDT	Tornado Warning Tornado observed	OUN	Foard, Hardeman, Wilbarger	46 min
Apr 23, 6:08 PM CDT	Severe Thunderstorm Warning	OUN	Archer, Baylor, Wichita	52 min
Apr 23, 6:18 PM CDT	Tornado Warning Tornado observedConsiderable damage threat	OUN	Foard, Hardeman, Wilbarger	42 min
Apr 23, 6:43 PM CDT	Tornado Warning Tornado observed	OUN	Wilbarger	32 min
Apr 23, 6:57 PM CDT	Severe Thunderstorm Warning	OUN	Archer, Wichita	19 min

Nearby

Severe Thunderstorm Warnings in Texas, 2021 Every severe thunderstorm warning 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.