Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 290, NWS Norman, OK

June 7, 20217 counties in Texas

NWS Norman, OK issued this severe thunderstorm warning at Jun 7, 2021, 3:47 AM CDT for 7 counties in Texas. It was in force for 43 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
Jun 7, 2021, 3:47 AM CDT (08:47 UTC)
Expired
Jun 7, 2021, 4:30 AM CDT
In force
43 min
Issued by
NWS Norman, OK
Area
Storm-based polygon
Hail
1.5 in
Wind
60.0 mph

Counties Archer County, TX, Baylor County, TX, Foard County, TX, Hardeman County, TX, Knox County, TX, Wichita County, TX, Wilbarger County, TX

The radar

The Altus AFB radar (KFDR), 39 km from the middle of the area, began a volume at 08:50 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jun 7, 2:48 AM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 8.8 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-pSkew-T log-p diagram, Fort Worth, TX at 00:00Z on 2021-06-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1357 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Fort Worth, TX at 00:00Z on 2021-06-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -16 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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.

375 
WUUS54 KOUN 070847
SVROUN
TXC009-023-155-197-275-485-487-070930-
/O.NEW.KOUN.SV.W.0290.210607T0847Z-210607T0930Z/

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

The National Weather Service in Norman has issued a

* Severe Thunderstorm Warning for...
  Archer County in northern Texas...
  Wichita County in northern Texas...
  Southeastern Foard County in northern Texas...
  Knox County in northern Texas...
  Wilbarger County in northern Texas...
  Baylor County in northern Texas...
  Eastern Hardeman County in northern Texas...

* Until 430 AM CDT.

* At 346 AM CDT, severe thunderstorms were located along a line
  extending from near Lockett to 8 miles southwest of Grayback to
  near Red Springs, moving east at 60 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, Vernon, Burkburnett, Seymour, Quanah, Archer City,
  Munday, Knox City, Benjamin, Iowa Park, Electra, Holliday,
  Chillicothe, Scotland, Goree, Megargel, Lake Diversion, Westover,
  Bomarton and Margaret.

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 3341 9994 3364 9993 3394 9967 3450 9983
      3437 9967 3438 9960 3442 9956 3437 9941
      3444 9939 3446 9936 3434 9921 3421 9919
      3422 9899 3415 9887 3416 9881 3413 9876
      3416 9860 3406 9848 3379 9846 3339 9858
TIME...MOT...LOC 0846Z 292DEG 54KT 3410 9936 3393 9929 3359 9938 

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

JT
1 follow-up statement
723 
WWUS54 KOUN 070915
SVSOUN

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

TXC155-197-275-070925-
/O.CAN.KOUN.SV.W.0290.000000T0000Z-210607T0930Z/
Foard TX-Knox TX-Hardeman TX-
415 AM CDT Mon Jun 7 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN FOARD...KNOX AND
EASTERN HARDEMAN COUNTIES IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled for southeastern 
Foard, Knox, and eastern Hardeman Counties.

LAT...LON 3340 9931 3421 9919 3422 9899 3415 9887
      3416 9881 3413 9876 3416 9860 3406 9848
      3379 9846 3339 9858
TIME...MOT...LOC 0915Z 143DEG 1KT 3397 9905 3380 9898 3346 9907 

$$

TXC009-023-485-487-070930-
/O.CON.KOUN.SV.W.0290.000000T0000Z-210607T0930Z/
Archer TX-Wichita TX-Wilbarger TX-Baylor TX-
415 AM CDT Mon Jun 7 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 AM CDT
FOR ARCHER...WICHITA...SOUTHEASTERN WILBARGER AND BAYLOR COUNTIES...

At 415 AM CDT, severe thunderstorms were located along a line
extending from 6 miles east of Grayback to near Lake Diversion to 4
miles southwest of Westover, and are nearly stationary.
 
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, Seymour, Archer City, Iowa Park, Electra,
Holliday, Scotland, Megargel, Sheppard AFB, Lake Diversion, Dundee,
Westover, Harrold, Lake Kemp, Mabelle, Oklaunion, Mankins, Grayback
and Lake Kickapoo.

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 9931 3421 9919 3422 9899 3415 9887
      3416 9881 3413 9876 3416 9860 3406 9848
      3379 9846 3339 9858
TIME...MOT...LOC 0915Z 143DEG 1KT 3397 9905 3380 9898 3346 9907 

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

JT

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 7, 3:05 AM CDTSpecial Weather StatementOUNHardeman25 min
Jun 7, 3:08 AM CDTSevere Thunderstorm WarningOUNBaylor, Foard, Knox52 min
Jun 7, 3:19 AM CDTSevere Thunderstorm WarningOUNHardeman, Wilbarger41 min
Jun 7, 3:25 AM CDTSevere Thunderstorm WarningOUNFoard, Hardeman, Wilbarger35 min
Jun 7, 4:31 AM CDTSevere Thunderstorm WarningOUNArcher, Baylor, Clay, Wichita44 min
Jun 7, 5:26 AM CDTAreal Flood AdvisoryOUNBaylor, Knox3 hr
Jun 7, 5:33 AM CDTSpecial Weather StatementOUNClay27 min

Nearby

Severe Thunderstorm Warnings in Texas, 2021Every 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.