Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 86, NWS Norman, OK

April 13, 2021Wichita County, Wilbarger County, Texas; Tillman County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Apr 13, 2021, 7:07 PM CDT for Wichita County, Wilbarger County, Texas; Tillman County, Oklahoma. It was in force for 38 min. 3 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Apr 13, 2021, 7:07 PM CDT (00:07 UTC)
Expired: Apr 13, 2021, 7:45 PM CDT
In force: 38 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Tillman County, OK, Wichita County, TX, Wilbarger County, TX

The radar

The Altus AFB radar (KFDR), 44 km from the middle of the area, began a volume at 00:09 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 was reported inside it

Time	Report	Where
Apr 13, 7:16 PM CDT	HAIL 0.7	Electra, TX
Apr 13, 7:38 PM CDT	HAIL 1	8 W Burkburnett, TX
Apr 13, 7:44 PM CDT	HAIL 1	3 W Burkburnett, TX

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 0.1 hours before the alert went out and 170 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2336 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: -82 m²/s²
0-3 km storm-relative helicity: 186 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

As transmitted.

272 
WUUS54 KOUN 140007
SVROUN
OKC141-TXC485-487-140045-
/O.NEW.KOUN.SV.W.0086.210414T0007Z-210414T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Norman OK
707 PM CDT Tue Apr 13 2021

The National Weather Service in Norman has issued a

* Severe Thunderstorm Warning for...
  Southeastern Tillman County in southwestern Oklahoma...
  Central Wichita County in northern Texas...
  Southeastern Wilbarger County in northern Texas...

* Until 745 PM CDT.

* At 707 PM CDT, a severe thunderstorm was located 3 miles 
  southwest of Electra, moving northeast at 35 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Burkburnett, Iowa Park, Electra, Grandfield, Sheppard AFB,
  Haynesville and Cashion.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3404 9907 3432 9861 3416 9861 3413 9855
      3412 9856 3406 9849 3407 9845 3408 9844
      3404 9842 3402 9842 3387 9905
TIME...MOT...LOC 0007Z 238DEG 30KT 3400 9891 

HAIL...1.00IN
WIND...60MPH
 
$$

..speg.

1 follow-up statement

774 
WWUS54 KOUN 140029
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
729 PM CDT Tue Apr 13 2021

TXC487-140039-
/O.CAN.KOUN.SV.W.0086.000000T0000Z-210414T0045Z/
Wilbarger TX-
729 PM CDT Tue Apr 13 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN WILBARGER COUNTY
IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved into 
Wichita County, therefore the warning for Wilbarger County has been 
cancelled.

LAT...LON 3413 9892 3432 9861 3416 9861 3413 9855
      3412 9856 3406 9849 3407 9845 3408 9844
      3404 9842 3396 9892
TIME...MOT...LOC 0029Z 243DEG 27KT 3407 9873 

$$

OKC141-TXC485-140045-
/O.CON.KOUN.SV.W.0086.000000T0000Z-210414T0045Z/
Tillman OK-Wichita TX-
729 PM CDT Tue Apr 13 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 745 PM CDT
FOR SOUTHEASTERN TILLMAN AND CENTRAL WICHITA COUNTIES...

At 729 PM CDT, a severe thunderstorm was located 8 miles north of
Iowa Park, moving northeast at 30 mph.

HAZARD...Ping pong ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

Locations impacted include...
Burkburnett, Electra, Grandfield, Cashion and Haynesville. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3413 9892 3432 9861 3416 9861 3413 9855
      3412 9856 3406 9849 3407 9845 3408 9844
      3404 9842 3396 9892
TIME...MOT...LOC 0029Z 243DEG 27KT 3407 9873 

HAIL...1.50IN
WIND...60MPH
 
$$

..speg.

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 13, 7:33 PM CDT	Special Weather Statement	OUN	Wilbarger	27 min
Apr 13, 7:41 PM CDT	Severe Thunderstorm Warning	OUN	Foard, Wilbarger	22 min
Apr 13, 7:45 PM CDT	Severe Thunderstorm Warning	OUN	Wichita	45 min
Apr 13, 10:02 PM CDT	Severe Thunderstorm Warning	OUN	Foard, Wilbarger	43 min
Apr 13, 10:44 PM CDT	Special Weather Statement	OUN	Wilbarger	31 min
Apr 14, 12:41 PM CDT	Special Weather Statement	OUN	Knox	34 min
Apr 14, 1:51 PM CDT	Special Weather Statement	OUN	Baylor	24 min
Apr 14, 1:56 PM CDT	Severe Thunderstorm Warning	OUN	Baylor	24 min
Apr 14, 2:22 PM CDT	Special Weather Statement	OUN	Baylor	23 min
Apr 14, 2:51 PM CDT	Special Weather Statement	OUN	Archer	24 min
Apr 14, 3:16 PM CDT	Special Weather Statement	OUN	Archer	29 min
Apr 14, 3:49 PM CDT	Special Weather Statement	OUN	Clay	26 min
Apr 14, 5:49 PM CDT	Severe Thunderstorm Warning	OUN	Baylor	41 min
Apr 14, 6:21 PM CDT	Special Weather Statement	OUN	Archer	24 min
Apr 13, 8:38 PM CDT	Special Weather Statement	OUN	Stephens	37 min
Apr 13, 9:20 PM CDT	Special Weather Statement	OUN	Jackson	25 min
Apr 14, 5:52 PM CDT	Special Weather Statement	OUN	Love	38 min
Apr 14, 6:29 PM CDT	Special Weather Statement	OUN	Love, Marshall	31 min

Nearby

Severe Thunderstorm Warnings in Texas, 2021 Severe Thunderstorm Warnings in Oklahoma, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.