Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 294, NWS Norman, OK

June 7, 20214 counties in Texas

NWS Norman, OK issued this severe thunderstorm warning at Jun 7, 2021, 4:31 AM CDT for 4 counties in Texas. It was in force for 44 min. 2 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: Jun 7, 2021, 4:31 AM CDT (09:31 UTC)
Expired: Jun 7, 2021, 5:15 AM CDT
In force: 44 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Archer County, TX, Baylor County, TX, Clay County, TX, Wichita County, TX

The radar

The Altus AFB radar (KFDR), 71 km from the middle of the area, began a volume at 09:32 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
Jun 7, 4:55 AM CDT	HAIL 1.5	5 Sw Wichita Falls, TX	RELAYED VIA MPING.
Jun 7, 4:57 AM CDT	HAIL 1	4 Wsw Wichita Falls, TX

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
Jun 7, 2:48 AM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 9.5 hours before the alert went out and 160 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: 1357 J/kg
Mixed-layer CIN: -79 J/kg
Mixed-layer LCL: 1516 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: -16 m²/s²
0-3 km storm-relative helicity: 51 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.3

Open this sounding in Storm Lab

The text

As transmitted.

922 
WUUS54 KOUN 070931
SVROUN
TXC009-023-077-485-071015-
/O.NEW.KOUN.SV.W.0294.210607T0931Z-210607T1015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Norman OK
431 AM CDT Mon Jun 7 2021

The National Weather Service in Norman has issued a

* Severe Thunderstorm Warning for...
  Clay County in northern Texas...
  Archer County in northern Texas...
  Wichita County in northern Texas...
  Southeastern Baylor County in northern Texas...

* Until 515 AM CDT.

* At 431 AM CDT, severe thunderstorms were located along a line
  extending from 7 miles northeast of Electra to 6 miles southwest of
  Iowa Park to 5 miles southwest of Lake Kickapoo to 4 miles south of
  Westover, moving east at 50 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...
  Wichita Falls, Burkburnett, Henrietta, Archer City, Iowa Park,
  Holliday, Petrolia, Scotland, Byers, Dean, Windthorst, Bellevue,
  Megargel, Jolly, Bluegrove, Mankins, Lake Arrowhead, Sheppard AFB,
  Lake Kickapoo and Newport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3340 9906 3357 9892 3389 9880 3415 9887
      3416 9881 3413 9874 3416 9860 3406 9848
      3409 9841 3416 9837 3411 9819 3415 9811
      3412 9809 3407 9812 3400 9809 3399 9795
      3390 9798 3347 9798 3347 9842 3340 9842
TIME...MOT...LOC 0931Z 264DEG 44KT 3408 9881 3390 9876 3358 9888 3343
9900

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

JT

2 follow-up statements

498 
WWUS54 KOUN 070945
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
445 AM CDT Mon Jun 7 2021

TXC009-023-077-485-071015-
/O.CON.KOUN.SV.W.0294.000000T0000Z-210607T1015Z/
Clay TX-Archer TX-Wichita TX-Baylor TX-
445 AM CDT Mon Jun 7 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 AM CDT
FOR CLAY...ARCHER...WICHITA AND SOUTHEASTERN BAYLOR COUNTIES...

At 445 AM CDT, severe thunderstorms were located along a line
extending from 7 miles west of Burkburnett to 3 miles south of Iowa
Park to 4 miles southeast of Lake Kickapoo to near Megargel, moving
east at 45 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...
Wichita Falls, Burkburnett, Henrietta, Archer City, Iowa Park,
Holliday, Petrolia, Scotland, Byers, Dean, Windthorst, Bellevue,
Megargel, Jolly, Bluegrove, Mankins, Lake Arrowhead, Sheppard AFB,
Lake Kickapoo and Newport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Continuous cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

LAT...LON 3340 9906 3357 9892 3389 9880 3415 9887
      3416 9881 3413 9874 3416 9860 3406 9848
      3409 9841 3416 9837 3411 9819 3415 9811
      3412 9809 3407 9812 3400 9809 3399 9795
      3390 9798 3347 9798 3347 9842 3340 9842
TIME...MOT...LOC 0945Z 263DEG 41KT 3409 9870 3391 9865 3359 9877 3344
9889

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

JT

160 
WWUS54 KOUN 071010
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
510 AM CDT Mon Jun 7 2021

TXC009-023-077-485-071020-
/O.EXP.KOUN.SV.W.0294.000000T0000Z-210607T1015Z/
Clay TX-Archer TX-Wichita TX-Baylor TX-
510 AM CDT Mon Jun 7 2021

...THE SEVERE THUNDERSTORM WARNING FOR CLAY...ARCHER...WICHITA AND
SOUTHEASTERN BAYLOR COUNTIES WILL EXPIRE AT 515 AM CDT...
             
The storms which prompted the warning have weakened below severe 
limits, therefore the warning will be allowed to expire.  However, 
gusty winds are still possible with these thunderstorms.

LAT...LON 3340 9906 3357 9892 3389 9880 3415 9887
      3416 9881 3413 9874 3416 9860 3406 9848
      3409 9841 3416 9837 3411 9819 3415 9811
      3412 9809 3407 9812 3400 9809 3399 9795
      3390 9798 3347 9798 3347 9842 3340 9842
TIME...MOT...LOC 1010Z 270DEG 35KT 3393 9845 3386 9842 3355 9860 3340
9875

$$

JT

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 7, 3:05 AM CDT	Special Weather Statement	OUN	Hardeman	25 min
Jun 7, 3:08 AM CDT	Severe Thunderstorm Warning	OUN	Baylor, Foard, Knox	52 min
Jun 7, 3:19 AM CDT	Severe Thunderstorm Warning	OUN	Hardeman, Wilbarger	41 min
Jun 7, 3:25 AM CDT	Severe Thunderstorm Warning	OUN	Foard, Hardeman, Wilbarger	35 min
Jun 7, 3:47 AM CDT	Severe Thunderstorm Warning	OUN	Archer, Baylor, Foard, Hardeman, Knox, Wichita and 1 more	43 min
Jun 7, 5:26 AM CDT	Areal Flood Advisory	OUN	Baylor, Knox	3 hr
Jun 7, 5:33 AM CDT	Special Weather Statement	OUN	Clay	27 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.