Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 201, NWS Norman, OK

May 16, 2021Archer County, Clay County, Texas

NWS Norman, OK issued this severe thunderstorm warning at May 16, 2021, 9:29 PM CDT for Archer County, Clay County, Texas. It was in force for 61 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: May 16, 2021, 9:29 PM CDT (02:29 UTC)
Expired: May 16, 2021, 10:30 PM CDT
In force: 61 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

Counties Archer County, TX, Clay County, TX

The radar

The Altus AFB radar (KFDR), 86 km from the middle of the area, began a volume at 02:30 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

Fort Worth, TX (KFWD), launched 00:00Z, 2.5 hours before the alert went out and 154 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: 496 J/kg
Mixed-layer CIN: -83 J/kg
Mixed-layer LCL: 815 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 58 m²/s²
0-3 km storm-relative helicity: 137 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

Open this sounding in Storm Lab

The text

As transmitted.

323 
WUUS54 KOUN 170229
SVROUN
TXC009-077-170330-
/O.NEW.KOUN.SV.W.0201.210517T0229Z-210517T0330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Norman OK
929 PM CDT Sun May 16 2021

The National Weather Service in Norman has issued a

* Severe Thunderstorm Warning for...
  Southwestern Clay County in northern Texas...
  Central Archer County in northern Texas...

* Until 1030 PM CDT.

* At 929 PM CDT, severe thunderstorms were located along a line
  extending from 3 miles northeast of Lake Kickapoo to 4 miles west
  of Lake Arrowhead, moving southeast at 5 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...
  Archer City, Scotland, Windthorst, Lake Arrowhead and Lake
  Kickapoo.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3353 9884 3363 9825 3380 9834 3375 9888
TIME...MOT...LOC 0229Z 333DEG 6KT 3368 9877 3372 9845 

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

11

3 follow-up statements

827 
WWUS54 KOUN 170301
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
1001 PM CDT Sun May 16 2021

TXC009-077-170330-
/O.CON.KOUN.SV.W.0201.000000T0000Z-210517T0330Z/
Clay TX-Archer TX-
1001 PM CDT Sun May 16 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 PM CDT
FOR SOUTHWESTERN CLAY AND NORTHEASTERN ARCHER COUNTIES...

At 1001 PM CDT, severe thunderstorms were located along a line
extending from 4 miles north of Archer City to 3 miles northeast of
Scotland, moving southeast at 15 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...
Archer City, Scotland and Lake Arrowhead. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3355 9873 3371 9874 3378 9834 3363 9827
TIME...MOT...LOC 0301Z 297DEG 11KT 3366 9865 3369 9843 

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

11

035 
WWUS54 KOUN 170318
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
1018 PM CDT Sun May 16 2021

TXC077-170327-
/O.CAN.KOUN.SV.W.0201.000000T0000Z-210517T0330Z/
Clay TX-
1018 PM CDT Sun May 16 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN CLAY COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has weakened.
Therefore, the warning has been cancelled.

LAT...LON 3372 9867 3376 9843 3374 9842 3361 9842
      3358 9858
TIME...MOT...LOC 0317Z 301DEG 9KT 3365 9854 

$$

TXC009-170330-
/O.CON.KOUN.SV.W.0201.000000T0000Z-210517T0330Z/
Archer TX-
1018 PM CDT Sun May 16 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 PM CDT
FOR NORTHEASTERN ARCHER COUNTY...

At 1017 PM CDT, a severe thunderstorm was located 4 miles west of
Scotland, moving southeast at 10 mph.

HAZARD...Quarter size hail.

SOURCE...Radar indicated.

IMPACT...Damage to vehicles is expected.

Locations impacted include...
Scotland and southwestern Lake Arrowhead. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3372 9867 3376 9843 3374 9842 3361 9842
      3358 9858
TIME...MOT...LOC 0317Z 301DEG 9KT 3365 9854 

HAIL...1.00IN
WIND...<50MPH
 
$$

11

167 
WWUS54 KOUN 170327
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
1027 PM CDT Sun May 16 2021

TXC009-170337-
/O.EXP.KOUN.SV.W.0201.000000T0000Z-210517T0330Z/
Archer TX-
1027 PM CDT Sun May 16 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN ARCHER COUNTY
WILL EXPIRE AT 1030 PM CDT...
                 
The storm which prompted the warning has weakened below severe
limits, therefore the warning will be allowed to expire.  However
small hail and heavy rain are still possible with this thunderstorm.

LAT...LON 3372 9867 3376 9843 3374 9842 3361 9842
      3358 9858
TIME...MOT...LOC 0327Z 333DEG 6KT 3364 9853 

$$

11

The office that day

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

Issued	Product	Office	Counties	Lasted
May 16, 7:23 PM CDT	Severe Thunderstorm Warning	OUN	Clay	52 min
May 16, 7:42 PM CDT	Special Weather Statement	OUN	Foard	33 min
May 16, 7:56 PM CDT	Severe Thunderstorm Warning	OUN	Foard	16 min
May 16, 8:10 PM CDT	Severe Thunderstorm Warning	OUN	Clay	65 min
May 16, 8:52 PM CDT	Areal Flood Advisory	OUN	Clay	3 hr
May 16, 9:04 PM CDT	Severe Thunderstorm Warning	OUN	Clay	56 min
May 16, 9:22 PM CDT	Special Weather Statement	OUN	Archer	23 min
May 16, 9:59 PM CDT	Severe Thunderstorm Warning	OUN	Foard, Hardeman, Knox	76 min
May 16, 10:31 PM CDT	Severe Thunderstorm Warning	OUN	Knox	44 min
May 16, 11:06 PM CDT	Severe Thunderstorm Warning	OUN	Baylor, Knox	39 min
May 16, 11:13 PM CDT	Special Weather Statement	OUN	Foard, Knox	32 min
May 16, 11:32 PM CDT	Severe Thunderstorm Warning	OUN	Baylor, Foard, Knox, Wilbarger	58 min
May 16, 11:38 PM CDT	Severe Thunderstorm Warning	OUN	Baylor	52 min
May 16, 11:44 PM CDT	Special Weather Statement	OUN	Wilbarger	31 min
May 17, 12:14 AM CDT	Severe Thunderstorm Warning	OUN	Archer, Baylor, Knox, Wichita, Wilbarger	38 min
May 17, 12:25 AM CDT	Areal Flood Advisory	OUN	Baylor, Foard, Knox, Wilbarger	3 hr
May 17, 12:55 AM CDT	Special Weather Statement	OUN	Archer, Wichita	35 min
May 17, 1:28 AM CDT	Special Weather Statement	OUN	Clay	32 min
May 17, 2:25 PM CDT	River Flood Advisory	OUN	Wichita, Wilbarger	18 hr
May 17, 5:13 PM CDT	Special Weather Statement	OUN	Knox	32 min
May 17, 5:45 PM CDT	Special Weather Statement	OUN	Knox	30 min
May 17, 6:05 PM CDT	Special Weather Statement	OUN	Foard	40 min
May 17, 6:18 PM CDT	Special Weather Statement	OUN	Foard	42 min
May 17, 6:23 PM CDT	Severe Thunderstorm Warning	OUN	Knox	67 min
May 17, 6:39 PM CDT	Severe Thunderstorm Warning	OUN	Foard, Hardeman, Wilbarger	12 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.