Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 246, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at May 25, 2018, 8:57 PM CDT for 4 counties in Oklahoma. It was in force for 48 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 25, 2018, 8:57 PM CDT (01:57 UTC)
- Expired
- May 25, 2018, 9:45 PM CDT
- In force
- 48 min
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Greer County, OK, Harmon County, OK, Jackson County, OK, Kiowa County, OK
The radar
The Altus AFB radar (KFDR), 65 km from the middle of the area, began a volume at 01:59 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 25, 3:43 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Amarillo Airport, TX (KAMA), launched 00:00Z, 2.0 hours before the alert went out and 210 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
- 243 J/kg
- Mixed-layer CIN
- -36 J/kg
- Mixed-layer LCL
- 3788 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 28 m²/s²
- 0-3 km storm-relative helicity
- 15 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 25, 6:44 PM CDT, 2 hours 13 minutes earlier.
Area forecast discussion, May 25, 6:44 PM CDT, 2 hours 13 minutes before
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Hazardous Weather Outlook...UPDATED National Weather Service Norman OK 414 PM CDT Fri May 25 2018 OKZ004>048-050>052-TXZ083>090-261000- 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- 414 PM CDT Fri May 25 2018 This hazardous weather outlook is for portions of northern... western...central...and southern Oklahoma...and western north Texas. .DAY ONE...Through Tonight... .Thunderstorms... There is a Slight Risk of severe thunderstorms mainly this evening across western parts Oklahoma and western north Texas. .Location... The Slight Risk area is generally southwest of a line from Woodward, to Weatherford, to Duncan and Ringling. This includes all of western north Texas. Strong storms will be possible across south-central and southeast Oklahoma through sunset, but severe weather is unlikely. .Timing... The most likely time for severe storms will be from 5 PM through about 11 PM. .Impacts... Damaging wind gusts of 60 to 70 mph and hail up to the size of golf balls will be the main hazards. Some of the storms today will produce locally heavy rainfall which may result in flooding of low lying and poor drainage areas. .Discussion... Thunderstorm development will be possible across the eastern Texas panhandle and far western Oklahoma through early this evening. Any storms that develop are expected to organize into a complex and move over southwest Oklahoma and western north Texas through the evening hours. .SPOTTER AND EMERGENCY MANAGEMENT STATEMENT... Storm spotter groups and emergency management personnel across the risk area should prepare for severe weather operations this evening. .DAYS TWO THROUGH SEVEN...Saturday through Thursday... .Heat... Triple digit heat is expected across the western third of Oklahoma and western north Texas this weekend and again by the middle of next week. .Thunderstorms... A few thunderstorms could move into mainly western and northern Oklahoma during the evening hours Sunday, Monday, and Tuesday. Severe thunderstorms are unlikely during this period. 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 25, 5:29 PM CDT, 3 hours 28 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
529 PM CDT FRI MAY 25 2018
OKZ031-032-252300-
Hughes OK-Seminole OK-
529 PM CDT FRI MAY 25 2018
...SIGNIFICANT WEATHER ADVISORY FOR west central Hughes and central
Seminole Counties Until 600 PM CDT...
AT 526 PM CDT, a strong thunderstorm was located near Seminole,
moving southeast at 40 MPH.
HAZARDS INCLUDE...
Hail up to the size of nickels...
Wind gusts to 40 MPH...
Minor flooding in areas of poor drainage...
Locations impacted include...
Seminole, Holdenville, Wewoka, Bowlegs and Lima.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Monitor the weather situation closely and be alert for threatening
weather conditions.
&&
LAT...LON 3505 9629 3504 9661 3527 9678 3529 9678
3535 9671
TIME...MOT...LOC 2226Z 307DEG 34KT 3527 9669
MAHALESpecial weather statement, May 25, 5:53 PM CDT, 3 hours 4 minutes before
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</html>Local storm report, May 25, 6:08 PM CDT, 2 hours 49 minutes before
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</html>Special weather statement, May 25, 6:37 PM CDT, 2 hours 20 minutes before
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</html>Special weather statement, May 25, 6:43 PM CDT, 2 hours 14 minutes before
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</html>The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 25, 7:42 PM CDT | Special Weather Statement | OUN | Beckham | 33 min |
| May 25, 8:01 PM CDT | Special Weather Statement | OUN | Beckham | 14 min |
| May 25, 8:14 PM CDT | Special Weather Statement | OUN | Beckham | 31 min |
| May 25, 8:22 PM CDT | Severe Thunderstorm Warning | OUN | Beckham, Greer, Kiowa, Washita | 38 min |
| May 25, 9:43 PM CDT | Special Weather Statement | OUN | Kiowa | 32 min |
| May 25, 11:47 PM CDT | Special Weather Statement | OUN | Atoka | 28 min |
| May 26, 12:22 AM CDT | Special Weather Statement | OUN | Hughes | 23 min |
| May 26, 12:23 AM CDT | Special Weather Statement | OUN | Marshall | 37 min |
| May 26, 12:56 AM CDT | Special Weather Statement | OUN | Marshall | 34 min |
| May 25, 7:03 PM CDT | Special Weather Statement | OUN | Knox, Wilbarger | 27 min |
| May 25, 7:27 PM CDT | Special Weather Statement | OUN | Baylor, Knox, Wilbarger | 33 min |
| May 25, 8:03 PM CDT | Severe Thunderstorm Warning | OUN | Baylor | 42 min |
| May 25, 8:08 PM CDT | Special Weather Statement | OUN | Knox | 37 min |
| May 25, 8:45 PM CDT | Special Weather Statement | OUN | Baylor | 30 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 2018Every severe thunderstorm warning in 2018
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.