Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 563, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Aug 17, 2018, 7:59 PM CDT for Garvin County, Murray County, Pontotoc County, Oklahoma. It was in force for 25 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
- Aug 17, 2018, 7:59 PM CDT (00:59 UTC)
- Expired
- Aug 17, 2018, 8:24 PM CDT
- In force
- 25 min
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Garvin County, OK, Murray County, OK, Pontotoc County, OK
The radar
The Norman radar (KTLX), 81 km from the middle of the area, began a volume at 01:03 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 00:00Z, 1.0 hours before the alert went out and 73 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
- 2882 J/kg
- Mixed-layer CIN
- -24 J/kg
- Mixed-layer LCL
- 1267 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 13 m²/s²
- 0-3 km storm-relative helicity
- 168 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 Aug 17, 6:31 PM CDT, 1 hour 28 minutes earlier.
Area forecast discussion, Aug 17, 6:31 PM CDT, 1 hour 28 minutes before
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</html>Hazardous weather outlook, Aug 17, 4:30 PM CDT, 3 hours 29 minutes before
Hazardous Weather Outlook...UPDATED National Weather Service Norman OK 430 PM CDT Fri Aug 17 2018 OKZ004>048-050>052-TXZ083>090-182130- 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- 430 PM CDT Fri Aug 17 2018 This hazardous weather outlook is for portions of northern... western...central...and southern Oklahoma...and western north Texas. .DAY ONE...Through Tonight... .Thunderstorms... A few strong to marginally severe storms will be likely across the southern half of Oklahoma and western north Texas through the evenig hours. The main impacts will be strong, gusty winds and hail. Overnight, thunderstorms over the Texas Panhandle may move into western Oklahoma. .Heavy Rainfall.. Heavy rainfall from thunderstorms could cause localized flooding, especially at any locations that have recently had significant rainfall. .Heat... Heat index values of 100 to 107 degrees are expected this afternoon. A Heat Advisory is in effect for south central and southeast Oklahoma. .DAYS TWO THROUGH SEVEN...Saturday through Thursday... .Thunderstorms... Thunderstorms are possible Saturday and Sunday, and could linger into Monday morning. The highest chance will be late Saturday into Sunday. A few strong to severe storms are possible during this period, although widespread or significant severe weather is unlikely. .Heavy Rainfall.. Heavy rainfall from thunderstorms could cause localized flooding, especially at any locations that have recently had significant rainfall. Get graphics and more details at weather.gov/norman...and follow our weather forecast office on Twitter and Facebook. Mahale/30
In the hours before
Local storm report, Aug 17, 6:08 PM CDT, 1 hour 51 minutes before
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</html>Local storm report, Aug 17, 6:14 PM CDT, 1 hour 45 minutes before
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</html>Special weather statement, Aug 17, 6:28 PM CDT, 1 hour 31 minutes before
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</html>Local storm report, Aug 17, 6:40 PM CDT, 1 hour 19 minutes before
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</html>Special weather statement, Aug 17, 6:44 PM CDT, 1 hour 15 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 |
|---|---|---|---|---|
| Aug 17, 7:18 PM CDT | Severe Thunderstorm Warning | OUN | Garvin, Murray, Pontotoc | 42 min |
| Aug 17, 7:57 PM CDT | Severe Thunderstorm Warning | OUN | Carter, Garvin, Murray, Stephens | 48 min |
| Aug 17, 8:12 PM CDT | Areal Flood Advisory | OUN | Garvin | 3 hr |
| Aug 17, 8:12 PM CDT | Areal Flood Advisory | OUN | Garvin | 3 hr |
| Aug 17, 8:57 PM CDT | Special Weather Statement | OUN | Grady | 33 min |
| Aug 18, 1:57 PM CDT | Special Weather Statement | OUN | Cotton | 33 min |
| Aug 18, 2:24 PM CDT | Severe Thunderstorm Warning | OUN | Cotton, Jefferson, Stephens | 51 min |
| Aug 18, 2:46 PM CDT | Areal Flood Advisory | OUN | Cotton | 119 min |
| Aug 18, 3:00 PM CDT | Severe Thunderstorm Warning | OUN | Jefferson, Stephens | 45 min |
| Aug 18, 3:32 PM CDT | Special Weather Statement | OUN | Jefferson | 13 min |
| Aug 18, 3:44 PM CDT | Severe Thunderstorm Warning | OUN | Carter, Jefferson, Stephens | 34 min |
| Aug 18, 3:53 PM CDT | Special Weather Statement | OUN | Stephens | 37 min |
| Aug 18, 4:03 PM CDT | Special Weather Statement | OUN | Love | 27 min |
| Aug 18, 4:22 PM CDT | Special Weather Statement | OUN | Carter, Garvin, Love, Murray | 38 min |
| Aug 18, 4:51 PM CDT | Severe Thunderstorm Warning | OUN | Carter | 24 min |
| Aug 18, 4:56 PM CDT | Special Weather Statement | OUN | Love | 34 min |
| Aug 18, 5:08 PM CDT | Severe Thunderstorm Warning | OUN | Carter, Johnston, Marshall | 39 min |
| Aug 18, 5:30 PM CDT | Special Weather Statement | OUN | Marshall | 30 min |
| Aug 18, 5:38 PM CDT | Severe Thunderstorm Warning | OUN | Love | 18 min |
| Aug 18, 5:42 PM CDT | Special Weather Statement | OUN | Marshall | 33 min |
| Aug 18, 6:09 PM CDT | Special Weather Statement | OUN | Marshall | 36 min |
| Aug 18, 4:50 PM CDT | Special Weather Statement | OUN | Clay | 25 min |
| Aug 18, 5:09 PM CDT | Special Weather Statement | OUN | Clay | 36 min |
| Aug 18, 5:21 PM CDT | Areal Flood Advisory | OUN | Clay | 3 hr |
| Aug 18, 5:45 PM CDT | Special Weather Statement | OUN | Jack | 30 min |
| Aug 18, 5:53 PM CDT | Severe Thunderstorm Warning | OUN | Clay | 34 min |
| Aug 18, 6:24 PM CDT | Special Weather Statement | OUN | Clay | 36 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.