Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 87, NWS Norman, OK

April 13, 2021Foard County, Wilbarger County, Texas

NWS Norman, OK issued this severe thunderstorm warning at Apr 13, 2021, 7:41 PM CDT for Foard County, Wilbarger County, Texas. It was in force for 22 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 13, 2021, 7:41 PM CDT (00:41 UTC)
Expired: Apr 13, 2021, 8:03 PM CDT
In force: 22 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Foard County, TX, Wilbarger County, TX

The radar

The Altus AFB radar (KFDR), 57 km from the middle of the area, began a volume at 00:42 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 nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 0.7 hours before the alert went out and 230 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.

332 
WUUS54 KOUN 140041
SVROUN
TXC155-487-140130-
/O.NEW.KOUN.SV.W.0087.210414T0041Z-210414T0130Z/

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

The National Weather Service in Norman has issued a

* Severe Thunderstorm Warning for...
  East central Foard County in northern Texas...
  Southern Wilbarger County in northern Texas...

* Until 830 PM CDT.

* At 741 PM CDT, a severe thunderstorm was located near Thalia,
  moving northeast at 25 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...
  Vernon, Thalia, Lockett, Grayback and Rayland. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3406 9956 3406 9955 3408 9953 3408 9951
      3407 9949 3408 9948 3411 9947 3425 9926
      3399 9904 3388 9961 3399 9966
TIME...MOT...LOC 0041Z 244DEG 24KT 3397 9952 

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

..speg.

1 follow-up statement

942 
WWUS54 KOUN 140103
SVSOUN

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

TXC155-487-140112-
/O.CAN.KOUN.SV.W.0087.000000T0000Z-210414T0130Z/
Foard TX-Wilbarger TX-
803 PM CDT Tue Apr 13 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL FOARD AND
SOUTHERN WILBARGER COUNTIES IS CANCELLED...
                 
The storm which prompted the warning has weakened below severe
limits, therefore the warning has been cancelled.  However small 
hail is still possible with this thunderstorm that is currently 
located just south of Lockett.

LAT...LON 3406 9956 3406 9955 3408 9953 3408 9951
      3407 9949 3408 9948 3411 9947 3425 9926
      3399 9904 3388 9961 3399 9966
TIME...MOT...LOC 0101Z 244DEG 24KT 3403 9936 

$$

..speg.

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 13, 7:07 PM CDT	Severe Thunderstorm Warning	OUN	Wichita, Wilbarger	38 min
Apr 13, 7:33 PM CDT	Special Weather Statement	OUN	Wilbarger	27 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

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.