Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 263, NWS Norman, OK

May 27, 2021Cotton County, Tillman County, Oklahoma; Clay County, Wichita County, Texas

NWS Norman, OK issued this severe thunderstorm warning at May 27, 2021, 10:04 PM CDT for Cotton County, Tillman County, Oklahoma; Clay County, Wichita County, Texas. It was in force for 41 min. 4 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
May 27, 2021, 10:04 PM CDT (03:04 UTC)
Expired
May 27, 2021, 10:45 PM CDT
In force
41 min
Issued by
NWS Norman, OK
Area
Storm-based polygon
Hail
1.5 in
Wind
60.0 mph

Counties Cotton County, OK, Tillman County, OK, Clay County, TX, Wichita County, TX

The radar

The Altus AFB radar (KFDR), 42 km from the middle of the area, began a volume at 03:05 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

TimeReportWhereRemark
May 27, 10:13 PM CDTHAIL 1.253 W Burkburnett, TX
May 27, 10:19 PM CDTHAIL 1Burkburnett, TX
May 27, 10:22 PM CDTTSTM WND GST 55Burkburnett, TX
May 27, 10:25 PM CDTTSTM WND GST 62Sheppard Afb, 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.

IssuedProductOfficeLasted
May 27, 3:39 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 3.1 hours before the alert went out and 189 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 2021-05-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1480 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 2021-05-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 124 square meters per square second.193958Sfc1 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
1480 J/kg
Mixed-layer CIN
-150 J/kg
Mixed-layer LCL
1331 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
124 m²/s²
0-3 km storm-relative helicity
203 m²/s²
Significant tornado parameter
0.2
Supercell composite
3.7

Open this sounding in Storm Lab

The text

As transmitted.

609 
WUUS54 KOUN 280304
SVROUN
OKC033-141-TXC077-485-280345-
/O.NEW.KOUN.SV.W.0263.210528T0304Z-210528T0345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Norman OK
1004 PM CDT Thu May 27 2021

The National Weather Service in Norman has issued a

* Severe Thunderstorm Warning for...
  Southwestern Cotton County in southwestern Oklahoma...
  Southeastern Tillman County in southwestern Oklahoma...
  Northwestern Clay County in northern Texas...
  Central Wichita County in northern Texas...

* Until 1045 PM CDT.

* At 1004 PM CDT, a severe thunderstorm was located 8 miles southwest
  of Grandfield, moving east at 35 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...
  Northern Wichita Falls, Burkburnett, Grandfield, Randlett, Devol, 
  Sheppard AFB, Taylor, Charlie and Cashion.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3403 9889 3416 9886 3427 9889 3423 9830
      3404 9829 3395 9839
TIME...MOT...LOC 0304Z 281DEG 28KT 3413 9876 

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

Mahale
3 follow-up statements
041 
WWUS54 KOUN 280308
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
1008 PM CDT Thu May 27 2021

OKC033-141-TXC077-485-280345-
/O.CON.KOUN.SV.W.0263.000000T0000Z-210528T0345Z/
Cotton OK-Tillman OK-Clay TX-Wichita TX-
1008 PM CDT Thu May 27 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 PM CDT
FOR SOUTHWESTERN COTTON...SOUTHEASTERN TILLMAN...NORTHWESTERN CLAY
AND CENTRAL WICHITA COUNTIES...

At 1008 PM CDT, a severe thunderstorm was located 5 miles west of
Burkburnett, moving east at 35 mph.

This is a very dangerous storm.

HAZARD...80 mph wind gusts and golf ball size hail.

SOURCE...Radar indicated.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be heavily damaged. Expect 
         considerable damage to roofs, windows, and vehicles. 
         Extensive tree damage and power outages are likely.

Locations impacted include...
Northwestern Wichita Falls, Burkburnett, Randlett, Devol, Sheppard
AFB, Taylor, Charlie and Cashion.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm is producing destructive winds and large damaging hail.
SEEK SHELTER NOW inside a sturdy structure and stay away from
windows.

&&

LAT...LON 3402 9883 3411 9880 3420 9880 3423 9830
      3404 9829 3395 9839
TIME...MOT...LOC 0308Z 283DEG 30KT 3408 9868 

HAIL...1.75IN
WIND...80MPH
 
$$

Mahale
515 
WWUS54 KOUN 280321
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
1021 PM CDT Thu May 27 2021

OKC141-280330-
/O.CAN.KOUN.SV.W.0263.000000T0000Z-210528T0345Z/
Tillman OK-
1021 PM CDT Thu May 27 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN TILLMAN COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 3400 9871 3408 9866 3412 9869 3413 9869
      3417 9865 3416 9861 3418 9856 3420 9830
      3404 9829 3395 9839
TIME...MOT...LOC 0320Z 281DEG 28KT 3406 9856 

$$

OKC033-TXC077-485-280345-
/O.CON.KOUN.SV.W.0263.000000T0000Z-210528T0345Z/
Cotton OK-Clay TX-Wichita TX-
1021 PM CDT Thu May 27 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 PM CDT
FOR SOUTHWESTERN COTTON...NORTHWESTERN CLAY AND NORTHEASTERN WICHITA
COUNTIES...

At 1020 PM CDT, a severe thunderstorm was located near Burkburnett,
moving east at 30 mph.

HAZARD...70 mph wind gusts and ping pong ball size hail.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect 
         considerable tree damage. Wind damage is also likely to 
         mobile homes, roofs, and outbuildings.

Locations impacted include...
Northern Wichita Falls, Burkburnett, Randlett, Sheppard AFB, Taylor, 
Charlie and Cashion.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and damaging winds. People outside
should move to a shelter, inside a strong building and away from
windows.

&&

LAT...LON 3400 9871 3408 9866 3412 9869 3413 9869
      3417 9865 3416 9861 3418 9856 3420 9830
      3404 9829 3395 9839
TIME...MOT...LOC 0320Z 281DEG 28KT 3406 9856 

HAIL...1.50IN
WIND...70MPH
 
$$

Mahale
727 
WWUS54 KOUN 280330
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
1030 PM CDT Thu May 27 2021

OKC033-TXC077-485-280345-
/O.CON.KOUN.SV.W.0263.000000T0000Z-210528T0345Z/
Cotton OK-Clay TX-Wichita TX-
1030 PM CDT Thu May 27 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 PM CDT
FOR SOUTH CENTRAL COTTON...NORTHWESTERN CLAY AND EAST CENTRAL WICHITA
COUNTIES...

At 1029 PM CDT, a severe thunderstorm was located 4 miles north of
Sheppard AFB, moving east at 30 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...
Northwestern Wichita Falls, Burkburnett, Randlett, Sheppard AFB,
Taylor, Charlie and Cashion.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3398 9861 3406 9858 3409 9853 3419 9844
      3420 9830 3404 9829 3395 9839
TIME...MOT...LOC 0329Z 281DEG 28KT 3405 9847 

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

Mahale

The office that day

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

IssuedProductOfficeCountiesLasted
May 27, 7:06 PM CDTAreal Flood AdvisoryOUNLincoln114 min
May 27, 7:11 PM CDTAreal Flood AdvisoryOUNLincoln, Pottawatomie, Seminole2 hr
May 27, 7:35 PM CDTSpecial Weather StatementOUNGrady25 min
May 27, 7:51 PM CDTSevere Thunderstorm WarningOUNJackson39 min
May 27, 8:09 PM CDTSpecial Weather StatementOUNStephens36 min
May 27, 8:26 PM CDTAreal Flood AdvisoryOUNCanadian, Cleveland, Kingfisher, Lincoln, Logan, Oklahoma3 hr
May 27, 8:35 PM CDTRiver Flood WatchOUNBryan14 hr
May 27, 8:41 PM CDTRiver Flood AdvisoryOUNPayne24 hr
May 27, 8:42 PM CDTRiver Flood AdvisoryOUNKingfisher, Logan24 hr
May 27, 8:57 PM CDTSpecial Weather StatementOUNStephens33 min
May 27, 9:25 PM CDTSpecial Weather StatementOUNStephens35 min
May 27, 9:46 PM CDTSpecial Weather StatementOUNTillman29 min
May 27, 10:34 PM CDTSevere Thunderstorm WarningOUNCotton, Jefferson41 min
May 27, 11:11 PM CDTSevere Thunderstorm WarningOUNJefferson, Love49 min
May 28, 4:42 AM CDTRiver Flood AdvisoryOUNPottawatomie, Seminole11 hr
May 28, 4:42 AM CDTRiver Flood AdvisoryOUNLincoln, Oklahoma, Pottawatomie11 hr
May 27, 8:26 PM CDTSevere Thunderstorm WarningOUNHardeman, Wilbarger49 min
May 27, 8:34 PM CDTSpecial Weather StatementOUNFoard26 min
May 27, 9:06 PM CDTSevere Thunderstorm WarningOUNWilbarger39 min
May 27, 9:15 PM CDTSpecial Weather StatementOUNWilbarger30 min
May 27, 10:12 PM CDTSpecial Weather StatementOUNWichita33 min
May 27, 10:36 PM CDTSevere Thunderstorm WarningOUNFoard39 min
May 27, 11:00 PM CDTSevere Thunderstorm WarningOUNFoard, Knox45 min
May 27, 11:03 PM CDTSpecial Weather StatementOUNFoard27 min
May 27, 11:27 PM CDTSevere Thunderstorm WarningOUNBaylor, Foard, Knox48 min
May 28, 12:09 AM CDTSevere Thunderstorm WarningOUNArcher, Baylor51 min
May 28, 12:13 AM CDTSpecial Weather StatementOUNKnox32 min
May 28, 12:46 AM CDTSevere Thunderstorm WarningOUNArcher, Clay44 min
May 28, 1:29 AM CDTSpecial Weather StatementOUNClay31 min
May 28, 2:13 AM CDTSpecial Weather StatementOUNFoard32 min
May 28, 4:55 AM CDTSpecial Weather StatementOUNFoard, Hardeman35 min
May 28, 5:24 AM CDTSpecial Weather StatementOUNFoard, Hardeman36 min
May 28, 8:14 AM CDTSpecial Weather StatementOUNHardeman31 min
May 28, 8:14 AM CDTSpecial Weather StatementOUNWilbarger31 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2021Severe 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.