Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 604, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Nov 30, 2018, 8:33 PM CST for Lincoln County, Oklahoma. It was in force for 13 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
- Nov 30, 2018, 8:33 PM CST (02:33 UTC)
- Expired
- Nov 30, 2018, 8:46 PM CST
- In force
- 13 min
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Lincoln County, OK
The radar
The Norman radar (KTLX), 55 km from the middle of the area, began a volume at 02:35 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 |
|---|---|---|---|
| Nov 30, 5:23 PM CST | Tornado Watch | SPC | 8 hr |
The nearest sounding before it
Norman, OK (KOUN), launched 00:00Z, 2.6 hours before the alert went out and 71 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
- 946 J/kg
- Mixed-layer CIN
- -21 J/kg
- Mixed-layer LCL
- 798 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 230 m²/s²
- 0-3 km storm-relative helicity
- 244 m²/s²
- Significant tornado parameter
- 1.1
- Supercell composite
- 5.7
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.
Hazardous weather outlook, Nov 30, 6:13 PM CST, 2 hours 20 minutes before
Hazardous Weather Outlook...UPDATED National Weather Service Norman OK 613 PM CST Fri Nov 30 2018 OKZ004>048-050>052-TXZ083>090-020015- 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- 613 PM CST Fri Nov 30 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 this evening across portions of Oklahoma and north Texas. Location... The Slight Risk area extends east of a line from Freedom to Clinton to Cache and Randlett Oklahoma to Henrietta Texas. A Marginal Risk covers the area between the Slight Risk area and a line from Laverne to Erick Oklahoma to Electra, Texas. Timing... The main risk will be through midnight. Impacts... Hail up to the size of baseballs, wind gusts 60 to 80 mph, and tornadoes will be possible. Discussion... Scattered thunderstorms will continue to move across much of the eastern two-thirds of Oklahoma and portions of western north Texas this evening. Instability will be marginal for severe storms, but wind fields will be very supportive. This will result in low- topped supercell storms during the evening hours. The storms will move quickly to the east or northeast. .SPOTTER AND EMERGENCY MANAGEMENT STATEMENT... Storm spotter groups and emergency management personnel across these risk areas should prepare for severe weather operations through the evening hours. .Fog... Areas of dense fog will continue this evening across northwestern Oklahoma. .DAYS TWO THROUGH SEVEN...Saturday through Thursday... .Fire weather... Warm, dry, breezy conditions will result in an elevated risk of wildfires Saturday afternoon across western Oklahoma and adjacent parts of Texas. .Winter weather... Light snow will be possible late Sunday night into early Monday morning...and again Thursday night, mainly across central and northern Oklahoma. Get graphics and more details at weather.gov/norman...and follow our weather forecast office on Twitter and Facebook.
In the hours before
Local storm report, Nov 30, 8:15 PM CST, 18 minutes before
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</html>Special weather statement, Nov 30, 8:16 PM CST, 17 minutes before
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</html>Local storm report, Nov 30, 8:24 PM CST, 9 minutes before
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</html>Special weather statement, Nov 30, 8:26 PM CST, 7 minutes before
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</html>Local storm report, Nov 30, 8:32 PM CST, 1 minute 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 |
|---|---|---|---|---|
| Nov 30, 6:00 PM CST | Special Weather Statement | OUN | Stephens | 30 min |
| Nov 30, 6:22 PM CST | Special Weather Statement | OUN | Jefferson | 23 min |
| Nov 30, 6:26 PM CST | Special Weather Statement | OUN | Grady | 34 min |
| Nov 30, 6:34 PM CST | Special Weather Statement | OUN | Tillman | 26 min |
| Nov 30, 6:45 PM CST | Special Weather Statement | OUN | McClain | 30 min |
| Nov 30, 6:48 PM CST | Severe Thunderstorm Warning | OUN | Canadian, Cleveland, Grady, McClain, Oklahoma | 42 min |
| Nov 30, 7:04 PM CST | Severe Thunderstorm Warning | OUN | Comanche, Cotton, Tillman | 41 min |
| Nov 30, 7:19 PM CST | Special Weather Statement | OUN | Jefferson | 26 min |
| Nov 30, 7:20 PM CST | Special Weather Statement | OUN | Cleveland, McClain | 25 min |
| Nov 30, 7:22 PM CST | Special Weather Statement | OUN | Garvin | 23 min |
| Nov 30, 7:23 PM CST | Special Weather Statement | OUN | Oklahoma | 37 min |
| Nov 30, 7:38 PM CST | Severe Thunderstorm Warning | OUN | Caddo, Comanche | 32 min |
| Nov 30, 7:45 PM CST | Special Weather Statement | OUN | Garvin | 30 min |
| Nov 30, 7:45 PM CST | Severe Thunderstorm Warning | OUN | Comanche, Cotton, Grady, Stephens | 45 min |
| Nov 30, 7:49 PM CST | Special Weather Statement | OUN | Pottawatomie | 26 min |
| Nov 30, 8:08 PM CST | Special Weather Statement | OUN | Payne | 37 min |
| Nov 30, 8:13 PM CST | Special Weather Statement | OUN | Lincoln, Pottawatomie | 32 min |
| Nov 30, 8:16 PM CST | Special Weather Statement | OUN | Carter, Murray | 29 min |
| Nov 30, 8:26 PM CST | Special Weather Statement | OUN | Marshall | 34 min |
| Nov 30, 8:35 PM CST | Severe Thunderstorm Warning | OUN | Carter, Johnston, Murray, Pontotoc | 25 min |
| Nov 30, 8:41 PM CST | Special Weather Statement | OUN | Cleveland, McClain, Oklahoma | 34 min |
| Nov 30, 9:03 PM CST | Special Weather Statement | OUN | Coal | 27 min |
| Nov 30, 9:14 PM CST | Severe Thunderstorm Warning | OUN | Atoka, Bryan, Coal, Johnston | 46 min |
| Nov 30, 9:15 PM CST | Special Weather Statement | OUN | Lincoln, Logan, Payne | 30 min |
| Nov 30, 9:17 PM CST | Special Weather Statement | OUN | Seminole | 28 min |
| Nov 30, 6:36 PM CST | Special Weather Statement | OUN | Clay | 24 min |
| Nov 30, 6:55 PM CST | Special Weather Statement | OUN | Wichita | 35 min |
| Nov 30, 7:01 PM CST | Special Weather Statement | OUN | Clay | 29 min |
| Nov 30, 7:08 PM CST | Severe Thunderstorm Warning | OUN | Clay | 22 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.