Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 172, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at May 3, 2021, 11:53 PM CDT for Cotton County, Tillman County, Oklahoma; Clay County, Wichita County, Texas. It was in force for 52 min. 3 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 3, 2021, 11:53 PM CDT (04:53 UTC)
- Expired
- May 4, 2021, 12:45 AM CDT
- In force
- 52 min
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
- Hail
- 0.75 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), 47 km from the middle of the area, began a volume at 04:55 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 |
|---|---|---|---|
| May 4, 12:15 AM CDT | TSTM WND GST 71 | Sheppard Afb, TX | |
| May 4, 12:16 AM CDT | TSTM WND GST 58 | Burkburnett, TX | |
| May 4, 12:21 AM CDT | HAIL 0.75 | Sheppard Afb, TX |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Fort Worth, TX (KFWD), launched 00:00Z, 4.9 hours before the alert went out and 184 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.
- Mixed-layer CAPE
- 3299 J/kg
- Mixed-layer CIN
- -10 J/kg
- Mixed-layer LCL
- 1213 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- 150 m²/s²
- 0-3 km storm-relative helicity
- 143 m²/s²
- Significant tornado parameter
- 2.6
- Supercell composite
- 13.9
The text
As transmitted.
476 WUUS54 KOUN 040453 SVROUN OKC033-141-TXC077-485-040545- /O.NEW.KOUN.SV.W.0172.210504T0453Z-210504T0545Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Norman OK 1153 PM CDT Mon May 3 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 1245 AM CDT. * At 1153 PM CDT, a severe thunderstorm was located 7 miles northwest of Iowa Park, moving east at 35 mph. HAZARD...60 mph wind gusts and penny size hail. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * Locations impacted include... Northwestern Wichita Falls, Burkburnett, Iowa Park, Dean, 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. Hail and damaging winds and continuous cloud to ground lightning is occurring with this storm. 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 3398 9883 3415 9893 3419 9831 3394 9826 TIME...MOT...LOC 0453Z 268DEG 32KT 3405 9874 HAIL...0.75IN WIND...60MPH $$ 03
4 follow-up statements
096
WWUS54 KOUN 040504
SVSOUN
Severe Weather Statement
National Weather Service Norman OK
1204 AM CDT Tue May 4 2021
OKC033-141-TXC077-485-040545-
/O.CON.KOUN.SV.W.0172.000000T0000Z-210504T0545Z/
Cotton OK-Tillman OK-Clay TX-Wichita TX-
1204 AM CDT Tue May 4 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1245 AM CDT
FOR SOUTHWESTERN COTTON...SOUTHEASTERN TILLMAN...NORTHWESTERN CLAY
AND NORTHEASTERN WICHITA COUNTIES...
At 1204 AM CDT, a severe thunderstorm was located near Burkburnett,
moving east at 35 mph.
HAZARD...70 mph wind gusts and ping pong ball size hail.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect
considerable tree damage. Wind damage is also likely to
mobile homes, roofs, and outbuildings.
Locations impacted include...
Northwestern Wichita Falls, Burkburnett, Iowa Park, Dean, Randlett,
Sheppard AFB, Taylor, Charlie and Cashion.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Prepare immediately for large hail and damaging winds. People outside
should move to a shelter, inside a strong building and away from
windows.
Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
&&
LAT...LON 3397 9875 3416 9880 3419 9831 3394 9826
TIME...MOT...LOC 0504Z 268DEG 32KT 3405 9862
HAIL...1.50IN
WIND...70MPH
$$
03333
WWUS54 KOUN 040516
SVSOUN
Severe Weather Statement
National Weather Service Norman OK
1216 AM CDT Tue May 4 2021
OKC141-040525-
/O.CAN.KOUN.SV.W.0172.000000T0000Z-210504T0545Z/
Tillman OK-
1216 AM CDT Tue May 4 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 3396 9861 3413 9862 3419 9831 3394 9826
TIME...MOT...LOC 0515Z 273DEG 39KT 3402 9845
$$
OKC033-TXC077-485-040545-
/O.CON.KOUN.SV.W.0172.000000T0000Z-210504T0545Z/
Cotton OK-Clay TX-Wichita TX-
1216 AM CDT Tue May 4 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1245 AM CDT
FOR SOUTHWESTERN COTTON...NORTHWESTERN CLAY AND NORTHEASTERN WICHITA
COUNTIES...
At 1215 AM CDT, a severe thunderstorm was located near Sheppard AFB,
moving east at 45 mph.
HAZARD...70 mph wind gusts and ping pong ball size hail.
SOURCE...Trained weather spotters.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect
considerable tree damage. Wind damage is also likely to
mobile homes, roofs, and outbuildings.
Locations impacted include...
Northwestern Wichita Falls, Burkburnett, Dean, Sheppard AFB, Taylor,
Charlie and Cashion.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Prepare immediately for large hail and damaging winds. People outside
should move to a shelter, inside a strong building and away from
windows.
Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
&&
LAT...LON 3396 9861 3413 9862 3419 9831 3394 9826
TIME...MOT...LOC 0515Z 273DEG 39KT 3402 9845
HAIL...1.50IN
WIND...70MPH
$$
03919
WWUS54 KOUN 040521
SVSOUN
Severe Weather Statement
National Weather Service Norman OK
1221 AM CDT Tue May 4 2021
OKC033-TXC077-485-040545-
/O.CON.KOUN.SV.W.0172.000000T0000Z-210504T0545Z/
Cotton OK-Clay TX-Wichita TX-
1221 AM CDT Tue May 4 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1245 AM CDT
FOR SOUTHWESTERN COTTON...NORTHWESTERN CLAY AND NORTHEASTERN WICHITA
COUNTIES...
At 1220 AM CDT, a severe thunderstorm was located 6 miles north of
Dean, moving east at 35 mph.
HAZARD...70 mph wind gusts and ping pong ball size hail.
SOURCE...A 71 mph wind gust was observed at Sheppard Air Force base
at 1215 AM.
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...
Northwestern Wichita Falls, Burkburnett, Dean, 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.
Continuous cloud to ground lightning is occurring with this storm.
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 3396 9861 3413 9862 3419 9831 3394 9826
TIME...MOT...LOC 0520Z 268DEG 32KT 3402 9839
HAIL...1.50IN
WIND...70MPH
$$
03477
WWUS54 KOUN 040541
SVSOUN
Severe Weather Statement
National Weather Service Norman OK
1241 AM CDT Tue May 4 2021
OKC033-TXC077-485-040551-
/O.EXP.KOUN.SV.W.0172.000000T0000Z-210504T0545Z/
Cotton OK-Clay TX-Wichita TX-
1241 AM CDT Tue May 4 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN COTTON...
NORTHWESTERN CLAY AND NORTHEASTERN WICHITA COUNTIES WILL EXPIRE AT
1245 AM CDT...
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.
Remember, a Severe Thunderstorm Warning still remains in effect for
northern Clay County.
LAT...LON 3396 9861 3413 9862 3419 9831 3394 9826
TIME...MOT...LOC 0541Z 268DEG 32KT 3403 9817
$$
03The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 3, 7:02 PM CDT | Severe Thunderstorm Warning | OUN | Coal, Hughes | 43 min |
| May 3, 7:07 PM CDT | Tornado Warning | OUN | Coal | 26 min |
| May 3, 7:13 PM CDT | Severe Thunderstorm Warning | OUN | Garvin, Murray, Pontotoc | 47 min |
| May 3, 7:22 PM CDT | Areal Flood Advisory | OUN | Atoka, Coal, Hughes, Johnston, Pontotoc, Seminole | 3 hr |
| May 3, 7:23 PM CDT | Severe Thunderstorm Warning | OUN | Atoka, Coal | 37 min |
| May 3, 7:32 PM CDT | Severe Thunderstorm Warning | OUN | Coal, Johnston, Pontotoc | 43 min |
| May 3, 7:41 PM CDT | Flash Flood Warning | OUN | Coal, Pontotoc | 3 hr |
| May 3, 7:52 PM CDT | Special Weather Statement | OUN | Seminole | 23 min |
| May 3, 7:55 PM CDT | Special Weather Statement | OUN | Pontotoc | 35 min |
| May 3, 7:59 PM CDT | Severe Thunderstorm Warning | OUN | Atoka, Coal | 46 min |
| May 3, 8:06 PM CDT | Severe Thunderstorm Warning | OUN | Lincoln, Pottawatomie, Seminole | 39 min |
| May 3, 8:07 PM CDT | Tornado Warning | OUN | Atoka | 8 min |
| May 3, 8:14 PM CDT | Special Weather Statement | OUN | Pottawatomie | 46 min |
| May 3, 8:26 PM CDT | Special Weather Statement | OUN | Marshall | 34 min |
| May 3, 8:33 PM CDT | Severe Thunderstorm Warning | OUN | Pottawatomie, Seminole | 42 min |
| May 3, 8:36 PM CDT | Severe Thunderstorm Warning | OUN | Bryan, Johnston, Marshall | 39 min |
| May 3, 8:39 PM CDT | Severe Thunderstorm Warning | OUN | Pottawatomie | 51 min |
| May 3, 8:46 PM CDT | Special Weather Statement | OUN | Atoka | 29 min |
| May 3, 8:48 PM CDT | Special Weather Statement | OUN | Coal | 27 min |
| May 3, 8:55 PM CDT | Severe Thunderstorm Warning | OUN | Atoka, Coal | 50 min |
| May 3, 8:56 PM CDT | Flash Flood Warning | OUN | Atoka, Coal | 3 hr |
| May 3, 8:57 PM CDT | Tornado Warning | OUN | Atoka | 33 min |
| May 3, 9:03 PM CDT | Areal Flood Advisory | OUN | Pottawatomie | 3 hr |
| May 3, 9:09 PM CDT | Severe Thunderstorm Warning | OUN | Lincoln, Pottawatomie | 51 min |
| May 3, 9:24 PM CDT | Special Weather Statement | OUN | Garvin | 36 min |
| May 3, 9:30 PM CDT | Severe Thunderstorm Warning | OUN | Lincoln | 45 min |
| May 3, 9:32 PM CDT | Severe Thunderstorm Warning | OUN | Garvin, McClain, Pontotoc, Pottawatomie | 43 min |
| May 3, 9:44 PM CDT | Special Weather Statement | OUN | Hughes | 31 min |
| May 3, 10:04 PM CDT | Severe Thunderstorm Warning | OUN | Lincoln | 41 min |
| May 3, 10:32 PM CDT | Severe Thunderstorm Warning | OUN | Lincoln, Payne | 43 min |
| May 3, 10:36 PM CDT | Severe Thunderstorm Warning | OUN | Jackson | 54 min |
| May 3, 11:09 PM CDT | Severe Thunderstorm Warning | OUN | Noble, Payne | 31 min |
| May 3, 11:15 PM CDT | Severe Thunderstorm Warning | OUN | Jackson, Tillman | 45 min |
| May 3, 11:34 PM CDT | Special Weather Statement | OUN | Cleveland | 26 min |
| May 3, 11:56 PM CDT | Special Weather Statement | OUN | Jefferson, Stephens | 64 min |
| May 4, 12:12 AM CDT | Severe Thunderstorm Warning | OUN | Carter, Garvin, Stephens | 48 min |
| May 4, 12:18 AM CDT | Special Weather Statement | OUN | Payne | 42 min |
| May 4, 12:28 AM CDT | Severe Thunderstorm Warning | OUN | Cotton, Jefferson | 47 min |
| May 4, 12:40 AM CDT | Severe Thunderstorm Warning | OUN | Carter, Garvin, Murray | 50 min |
| May 4, 12:43 AM CDT | Severe Thunderstorm Warning | OUN | Carter, Jefferson, Love | 29 min |
| May 4, 12:49 AM CDT | Severe Thunderstorm Warning | OUN | Lincoln, Logan, Payne | 41 min |
| May 4, 1:05 AM CDT | Special Weather Statement | OUN | Love | 40 min |
| May 4, 1:20 AM CDT | Special Weather Statement | OUN | Cleveland | 25 min |
| May 4, 1:23 AM CDT | Severe Thunderstorm Warning | OUN | Johnston, Murray, Pontotoc | 52 min |
| May 4, 1:55 AM CDT | Severe Thunderstorm Warning | OUN | Coal, Johnston, Pontotoc | 50 min |
| May 4, 2:00 AM CDT | Special Weather Statement | OUN | Hughes | 45 min |
| May 4, 2:31 AM CDT | Special Weather Statement | OUN | Coal | 29 min |
| May 4, 1:47 PM CDT | River Flood Advisory | OUN | Atoka | 19 hr |
| May 3, 10:05 PM CDT | Special Weather Statement | OUN | Hardeman | 40 min |
| May 3, 11:04 PM CDT | Special Weather Statement | OUN | Wilbarger | 26 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.