Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 328, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at May 22, 2020, 5:28 PM CDT for Cotton County, Tillman County, Oklahoma; Wichita County, Texas. It was in force for 47 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- May 22, 2020, 5:28 PM CDT (22:28 UTC)
- Expired
- May 22, 2020, 6:15 PM CDT
- In force
- 47 min
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
- Hail
- 3.0 in
- Wind
- 60.0 mph
Counties Cotton County, OK, Tillman County, OK, Wichita County, TX
The radar
The Altus AFB radar (KFDR), 33 km from the middle of the area, began a volume at 22:29 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.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 22, 1:27 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Fort Worth, TX (KFWD), launched 12:00Z, 10.5 hours before the alert went out and 200 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
- 580 J/kg
- Mixed-layer CIN
- -430 J/kg
- Mixed-layer LCL
- 1997 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 30 m²/s²
- 0-3 km storm-relative helicity
- 59 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Norman, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at May 22, 2:14 PM CDT, 3 hours 14 minutes earlier.
Area forecast discussion, May 22, 2:14 PM CDT, 3 hours 14 minutes before
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</html>Hazardous weather outlook, May 22, 11:57 AM CDT, 5 hours 31 minutes before
Hazardous Weather Outlook...UPDATED National Weather Service Norman OK 1157 AM CDT Fri May 22 2020 OKZ004>048-050>052-TXZ083>090-231700- Harper-Woods-Alfalfa-Grant-Kay-Ellis-Woodward-Major-Garfield- Noble-Roger Mills-Dewey-Custer-Blaine-Kingfisher-Logan-Payne- Beckham-Washita-Caddo-Canadian-Oklahoma-Lincoln-Grady-McClain- Cleveland-Pottawatomie-Seminole-Hughes-Harmon-Greer-Kiowa-Jackson- Tillman-Comanche-Stephens-Garvin-Murray-Pontotoc-Coal-Cotton- Jefferson-Carter-Johnston-Atoka-Love-Marshall-Bryan-Hardeman- Foard-Wilbarger-Wichita-Knox-Baylor-Archer-Clay- 1157 AM CDT Fri May 22 2020 This hazardous weather outlook is for portions of northern... western...central...and southern Oklahoma...and western north Texas. .DAY ONE...This Afternoon through Tonight... .Thunderstorms... Thunderstorms are likely to develop near a remnant outflow boundary across western-north Texas later this afternoon, most likely not until around 3pm. Hail up to two inches in diameter and wind gusts up to 70 mph will be possible with these storms. The most likely locations to be impacted are south of a line from Altus to Waurika. A cluster of storms may evolve this evening and move eastward across southern Oklahoma with a continued threat of severe weather. This evening, the primary threat will transition to damaging winds, although large hail may still be possible with the strongest storms. A tornado or two is possible, especially near and south of the Red River during the early to mid evening. Individual storm motion will be east-northeasterly at 15 to 25 mph. The severe weather threat should diminish early tonight as storms weaken and move southeast of the area. .SPOTTER AND EMERGENCY MANAGEMENT STATEMENT... Storm spotter groups and emergency management personnel across the risk areas should prepare for severe weather operations late this afternoon and tonight. .Heavy Rainfall... Heavy rainfall will be possible this morning across parts of southeastern Oklahoma. Additional heavy rainfall will be possible late this afternoon and tonight across southern Oklahoma and western north Texas. .DAYS TWO THROUGH SEVEN...Saturday through Thursday... .Thunderstorms... Thunderstorms are expected to continue off and on through next Thursday. A Marginal Risk covers the area west of Alva to Hobart to Archer City Texas on Saturday, mainly during the evening. Severe thunderstorms will also be possible on Sunday, but details are still uncertain regarding timing and location. .Heavy rain... Heavy rainfall is possible, particularly on Friday, and again Sunday night into Monday. Heavy rainfall may lead to flooding. Get graphics and more details at weather.gov/norman...and follow our weather forecast office on Twitter and Facebook.
In the hours before
Special weather statement, May 22, 4:47 PM CDT, 41 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
447 PM CDT Fri May 22 2020
OKZ037-TXZ085-086-222200-
Tillman OK-Wichita TX-Wilbarger TX-
447 PM CDT Fri May 22 2020
...SIGNIFICANT WEATHER ADVISORY FOR southern Tillman...northwestern
Wichita and east central Wilbarger Counties Until 500 PM CDT...
AT 444 PM CDT, a strong thunderstorm was located near Davidson,
moving northeast at 35 MPH.
HAZARDS INCLUDE...
Hail up to the size of nickels...
Wind gusts to 50 MPH...
Locations impacted include...
Davidson, Hollister and Loveland.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Monitor the weather situation closely and be alert for threatening
weather conditions.
&&
LAT...LON 3425 9918 3451 9878 3435 9866 3434 9866
3433 9865 3428 9861 3410 9907
TIME...MOT...LOC 2144Z 238DEG 30KT 3422 9905
BRBLocal storm report, May 22, 5:18 PM CDT, 10 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
518 PM CDT FRI MAY 22 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0517 PM HAIL HOLLISTER 34.34N 98.87W
05/22/2020 M1.00 INCH TILLMAN OK EMERGENCY MNGR
&&
BTHORENThe office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 22, 1:19 AM CDT | Special Weather Statement | OUN | Alfalfa, Harper, Woods, Woodward | 26 min |
| May 22, 1:49 AM CDT | Special Weather Statement | OUN | Alfalfa, Woods, Woodward | 41 min |
| May 22, 1:51 AM CDT | Severe Thunderstorm Warning | OUN | Harper, Woods, Woodward | 39 min |
| May 22, 2:12 AM CDT | Severe Thunderstorm Warning | OUN | Major, Woods | 18 min |
| May 22, 2:30 AM CDT | Special Weather Statement | OUN | Woods | 30 min |
| May 22, 2:35 AM CDT | Special Weather Statement | OUN | Ellis, Grant, Major, Woodward | 25 min |
| May 22, 2:44 AM CDT | Special Weather Statement | OUN | Woods | 31 min |
| May 22, 3:02 AM CDT | Special Weather Statement | OUN | Blaine, Dewey, Ellis | 28 min |
| May 22, 3:03 AM CDT | Special Weather Statement | OUN | Grant, Major | 27 min |
| May 22, 3:06 AM CDT | Severe Thunderstorm Warning | OUN | Alfalfa, Garfield, Grant, Major | 39 min |
| May 22, 3:19 AM CDT | Severe Thunderstorm Warning | OUN | Alfalfa, Garfield, Grant | 41 min |
| May 22, 3:40 AM CDT | Severe Thunderstorm Warning | OUN | Garfield, Kingfisher, Logan, Major, Noble | 50 min |
| May 22, 4:08 AM CDT | Special Weather Statement | OUN | Blaine | 37 min |
| May 22, 4:20 AM CDT | Special Weather Statement | OUN | Blaine | 25 min |
| May 22, 4:24 AM CDT | Severe Thunderstorm Warning | OUN | Canadian, Garfield, Grant, Kay, Kingfisher, Lincoln and 4 more | 51 min |
| May 22, 4:40 AM CDT | Special Weather Statement | OUN | Stephens | 35 min |
| May 22, 5:04 AM CDT | Special Weather Statement | OUN | Stephens | 26 min |
| May 22, 5:07 AM CDT | Severe Thunderstorm Warning | OUN | Cleveland, Lincoln, Logan, Noble, Oklahoma, Payne and 2 more | 38 min |
| May 22, 5:13 AM CDT | Severe Thunderstorm Warning | OUN | Carter, Jefferson, Stephens | 47 min |
| May 22, 5:20 AM CDT | Special Weather Statement | OUN | McClain | 25 min |
| May 22, 5:39 AM CDT | Severe Thunderstorm Warning | OUN | Cleveland, Lincoln, Oklahoma, Payne, Pottawatomie, Seminole | 51 min |
| May 22, 5:53 AM CDT | Severe Thunderstorm Warning | OUN | Carter, Garvin, Grady, McClain, Murray, Stephens | 52 min |
| May 22, 6:22 AM CDT | Severe Thunderstorm Warning | OUN | Cleveland, McClain, Pottawatomie | 35 min |
| May 22, 6:24 AM CDT | Severe Thunderstorm Warning | OUN | Hughes, Lincoln, Pottawatomie, Seminole | 51 min |
| May 22, 6:41 AM CDT | Severe Thunderstorm Warning | OUN | Garvin, McClain, Murray, Pontotoc, Pottawatomie, Seminole | 49 min |
| May 22, 6:56 AM CDT | Special Weather Statement | OUN | Carter | 34 min |
| May 22, 7:30 AM CDT | Special Weather Statement | OUN | Carter, Murray | 30 min |
| May 22, 7:59 AM CDT | Special Weather Statement | OUN | Carter, Murray | 31 min |
| May 22, 4:47 PM CDT | Special Weather Statement | OUN | Tillman | 13 min |
| May 22, 4:57 PM CDT | Severe Thunderstorm Warning | OUN | Tillman | 33 min |
| May 22, 5:47 PM CDT | Severe Thunderstorm Warning | OUN | Comanche | 28 min |
| May 22, 6:03 PM CDT | Severe Thunderstorm Warning | OUN | Cotton, Tillman | 57 min |
| May 22, 6:12 PM CDT | Tornado Warning | OUN | Tillman | 33 min |
| May 22, 6:18 PM CDT | Special Weather Statement | OUN | Comanche | 27 min |
| May 22, 6:20 PM CDT | Severe Thunderstorm Warning | OUN | Comanche | 25 min |
| May 22, 6:22 PM CDT | Severe Thunderstorm Warning | OUN | Cotton, Tillman | 53 min |
| May 22, 6:39 PM CDT | Special Weather Statement | OUN | Caddo | 36 min |
| May 22, 6:50 PM CDT | Severe Thunderstorm Warning | OUN | Cotton, Tillman | 40 min |
| May 22, 6:57 PM CDT | Severe Thunderstorm Warning | OUN | Cotton | 48 min |
| May 21, 8:01 PM CDT | Severe Thunderstorm Warning | OUN | Baylor, Knox | 44 min |
| May 21, 8:33 PM CDT | Special Weather Statement | OUN | Baylor | 12 min |
| May 21, 8:40 PM CDT | Severe Thunderstorm Warning | OUN | Baylor, Knox, Wilbarger | 50 min |
| May 21, 9:26 PM CDT | Severe Thunderstorm Warning | OUN | Archer, Baylor, Wichita, Wilbarger | 17 min |
| May 22, 6:41 PM CDT | Special Weather Statement | OUN | Clay | 34 min |
| May 22, 6:53 PM CDT | Severe Thunderstorm Warning | OUN | Clay | 52 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 2020Severe Thunderstorm Warnings in Texas, 2020Every severe thunderstorm warning in 2020
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.