Alert archive / Texas / Tornado Warnings in 2021

Tornado Warning 9, NWS Norman, OK

April 23, 2021Wilbarger County, Texas

NWS Norman, OK issued this tornado warning at Apr 23, 2021, 6:43 PM CDT for Wilbarger County, Texas. It was in force for 32 min. 6 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 23, 2021, 6:43 PM CDT (23:43 UTC)
Expired: Apr 23, 2021, 7:15 PM CDT
In force: 32 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Tornado: Observed
Hail: 1.75 in

County Wilbarger County, TX

The radar

The Altus AFB radar (KFDR), 39 km from the middle of the area, began a volume at 23:43 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	Remark
Apr 23, 6:47 PM CDT	HAIL 3	Oklaunion, TX	TWITTER REPORT.
Apr 23, 6:50 PM CDT	HAIL 1.75	1 Wsw Oklaunion, TX	MPING
Apr 23, 6:50 PM CDT	HAIL 3	3 Wsw Oklaunion, TX	MPING.
Apr 23, 6:59 PM CDT	HAIL 1.75	4 Nne Grayback, TX
Apr 23, 6:59 PM CDT	HAIL 2	4 Nne Grayback, TX
Apr 23, 7:00 PM CDT	HAIL 2	5 Sw Harrold, TX	TWITTER REPORT WITH PICTURE. 1.5 TO 2.0 INCH HAIL.

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

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

Norman, OK (KOUN), launched 12:00Z, 11.7 hours before the alert went out and 209 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: 751 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 284 m²/s²
0-3 km storm-relative helicity: 202 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

164 
WFUS54 KOUN 232343
TOROUN
TXC487-240015-
/O.NEW.KOUN.TO.W.0009.210423T2343Z-210424T0015Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Norman OK
643 PM CDT Fri Apr 23 2021

The National Weather Service in Norman has issued a

* Tornado Warning for...
  Central Wilbarger County in northern Texas...

* Until 715 PM CDT.

* At 642 PM CDT, a confirmed tornado was located 5 miles south of
  Vernon, moving east at 25 mph.

  HAZARD...Damaging tornado and golf ball size hail.

  SOURCE...Weather spotters confirmed tornado.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* Locations impacted include...
  Vernon and Oklaunion. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado is on the ground. TAKE COVER NOW! Move to a
storm shelter, safe room or an interior room on the lowest floor of a
sturdy building. Avoid windows. If you are outdoors, in a mobile
home, or in a vehicle, move to the closest substantial shelter and
protect yourself from flying debris.

&&

LAT...LON 3403 9932 3416 9931 3419 9908 3400 9909
TIME...MOT...LOC 2342Z 270DEG 22KT 3408 9927 

TORNADO...OBSERVED
HAIL...1.75IN

$$

Ware

2 follow-up statements

064 
WWUS54 KOUN 232356
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
656 PM CDT Fri Apr 23 2021

TXC487-240015-
/O.CON.KOUN.TO.W.0009.000000T0000Z-210424T0015Z/
Wilbarger TX-
656 PM CDT Fri Apr 23 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 715 PM CDT FOR CENTRAL
WILBARGER COUNTY...
    
At 655 PM CDT, a severe thunderstorm capable of producing a tornado
was located 3 miles north of Grayback, moving east at 25 mph.

HAZARD...Tornado and golf ball size hail.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

Locations impacted include...
Oklaunion.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a storm shelter, safe room, or an interior
room on the lowest floor of a sturdy building. Avoid windows. If you
are outdoors, in a mobile home, or in a vehicle, move to the closest
substantial shelter and protect yourself from flying debris.

&&

LAT...LON 3402 9923 3417 9922 3419 9908 3400 9909
TIME...MOT...LOC 2355Z 275DEG 22KT 3405 9916 

TORNADO...RADAR INDICATED
HAIL...1.75IN

$$

Ware

775 
WWUS54 KOUN 240013
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
713 PM CDT Fri Apr 23 2021

TXC487-240023-
/O.EXP.KOUN.TO.W.0009.000000T0000Z-210424T0015Z/
Wilbarger TX-
713 PM CDT Fri Apr 23 2021

...THE TORNADO WARNING FOR CENTRAL WILBARGER COUNTY WILL EXPIRE AT
715 PM CDT...
                
The storm which prompted the warning no longer appears capable of 
producing a tornado. Therefore, the warning will be allowed to 
expire.

LAT...LON 3402 9923 3417 9922 3419 9908 3400 9909
TIME...MOT...LOC 0013Z 270DEG 22KT 3405 9904 

$$

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, 5:52 PM CDT	Severe Thunderstorm Warning	OUN	Baylor, Foard, Wilbarger	38 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, 6:57 PM CDT	Severe Thunderstorm Warning	OUN	Archer, Wichita	19 min

Nearby

Tornado Warnings in Texas, 2021 Every tornado warning in 2021 Tornadoes 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.