Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 724, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Jul 27, 2017, 6:39 PM CDT for Beckham County, Oklahoma. It was in force for 36 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
- Jul 27, 2017, 6:39 PM CDT (23:39 UTC)
- Expired
- Jul 27, 2017, 7:15 PM CDT
- In force
- 36 min
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 70.0 mph
County Beckham County, OK
The radar
The Altus AFB radar (KFDR), 120 km from the middle of the area, began a volume at 23:41 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 nearest sounding before it
Norman, OK (KOUN), launched 12:00Z, 11.7 hours before the alert went out and 207 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
- 53 J/kg
- Mixed-layer CIN
- -252 J/kg
- Mixed-layer LCL
- 1644 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- -50 m²/s²
- 0-3 km storm-relative helicity
- 126 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 Jul 27, 6:26 PM CDT, 13 minutes earlier.
Area forecast discussion, Jul 27, 6:26 PM CDT, 13 minutes before
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</html>Hazardous weather outlook, Jul 27, 11:43 AM CDT, 6 hours 56 minutes before
Hazardous Weather Outlook National Weather Service Norman OK 1143 AM CDT Thu Jul 27 2017 OKZ004>048-050>052-TXZ083>090-281645- 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- 1143 AM CDT Thu Jul 27 2017 This hazardous weather outlook is for portions of northern... western...central...and southern Oklahoma...and western north Texas. .DAY ONE...This Afternoon and Tonight... .Heat... Heat index values will rise to the 103 to 108 range this afternoon across portions of central and southern Oklahoma. A heat advisory is in effect for locations along and south of highway 412 and along and east of I-35. .Thunderstorms... Scattered showers and some thunderstorms will be possible through tonight across portions of the area. The strongest storms will be capable of gusty winds, along with brief heavy downpours, and frequent lightning. .DAYS TWO THROUGH SEVEN...Friday through Wednesday... .Thunderstorms... Thunderstorm chances will continue through early next week across portions of Oklahoma and western north Texas. Heavy rainfall and strong, gusty winds could be possible with some thunderstorms. Get graphics and more details at weather.gov/norman...and follow our weather forecast office on Twitter and Facebook. Kurtz
In the hours before
Local storm report, Jul 27, 6:14 PM CDT, 25 minutes before
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</html>Special weather statement, Jul 27, 6:19 PM CDT, 20 minutes before
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</html>Local storm report, Jul 27, 6:31 PM CDT, 8 minutes before
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</html>Special weather statement, Jul 27, 6:32 PM CDT, 7 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 |
|---|---|---|---|---|
| Jul 27, 3:46 PM CDT | Special Weather Statement | OUN | Canadian | 29 min |
| Jul 27, 4:28 PM CDT | Special Weather Statement | OUN | Caddo | 32 min |
| Jul 27, 4:35 PM CDT | Severe Thunderstorm Warning | OUN | Caddo, Washita | 25 min |
| Jul 27, 4:41 PM CDT | Special Weather Statement | OUN | Caddo | 34 min |
| Jul 27, 4:53 PM CDT | Special Weather Statement | OUN | Washita | 37 min |
| Jul 27, 5:00 PM CDT | Severe Thunderstorm Warning | OUN | Caddo, Canadian | 45 min |
| Jul 27, 5:16 PM CDT | Severe Thunderstorm Warning | OUN | Kiowa, Washita | 44 min |
| Jul 27, 5:28 PM CDT | Special Weather Statement | OUN | Kay | 62 min |
| Jul 27, 5:34 PM CDT | Special Weather Statement | OUN | Canadian | 41 min |
| Jul 27, 5:40 PM CDT | Severe Thunderstorm Warning | OUN | Canadian | 52 min |
| Jul 27, 5:44 PM CDT | Severe Thunderstorm Warning | OUN | Washita | 46 min |
| Jul 27, 5:55 PM CDT | Special Weather Statement | OUN | Oklahoma | 35 min |
| Jul 27, 5:59 PM CDT | Severe Thunderstorm Warning | OUN | Washita | 46 min |
| Jul 27, 6:02 PM CDT | Severe Thunderstorm Warning | OUN | Cleveland, Oklahoma | 58 min |
| Jul 27, 6:03 PM CDT | Special Weather Statement | OUN | Greer | 27 min |
| Jul 27, 6:19 PM CDT | Special Weather Statement | OUN | Canadian | 41 min |
| Jul 27, 6:27 PM CDT | Special Weather Statement | OUN | Oklahoma | 48 min |
| Jul 27, 6:32 PM CDT | Special Weather Statement | OUN | Beckham | 28 min |
| Jul 27, 6:40 PM CDT | Severe Thunderstorm Warning | OUN | Canadian, Oklahoma | 33 min |
| Jul 27, 6:53 PM CDT | Special Weather Statement | OUN | Canadian | 37 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 2017Every severe thunderstorm warning in 2017
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.