Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 574, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Jul 19, 2020, 6:54 PM CDT for Ellis County, Woodward County, Oklahoma. It was in force for 51 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 19, 2020, 6:54 PM CDT (23:54 UTC)
- Expired
- Jul 19, 2020, 7:45 PM CDT
- In force
- 51 min
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Ellis County, OK, Woodward County, OK
The radar
The Vance AFB radar (KVNX), 132 km from the middle of the area, began a volume at 23:54 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
Amarillo Airport, TX (KAMA), launched 12:00Z, 11.9 hours before the alert went out and 232 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
- 46 J/kg
- Mixed-layer CIN
- -267 J/kg
- Mixed-layer LCL
- 2229 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- 34 m²/s²
- 0-3 km storm-relative helicity
- 82 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 19, 6:07 PM CDT, 47 minutes earlier.
Area forecast discussion, Jul 19, 6:07 PM CDT, 47 minutes before
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Hazardous Weather Outlook National Weather Service Norman OK 1148 AM CDT Sun Jul 19 2020 OKZ004>048-050>052-TXZ083>090-201700- 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- 1148 AM CDT Sun Jul 19 2020 This hazardous weather outlook is for portions of northern... western...central...and southern Oklahoma...and western north Texas. .DAY ONE...This Afternoon and Tonight... .Thunderstorms... Additional and stronger storms are expected to develop over or near northwest Oklahoma late this afternoon and evening. Some of the storms may reach severe levels and produce damaging wind gusts. .Heat... Muggy conditions this afternoon will lead to heat indices near 105 across portions of northern Oklahoma. A Heat Advisory is in effect. .DAYS TWO THROUGH SEVEN...Monday through Saturday... .Thunderstorms... There will be a chance for thunderstorms through Wednesday, primarily across the northern half of Oklahoma. A few storms may produce strong to damaging wind gusts, but organized severe weather appears unlikely. 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, Jul 19, 4:50 PM CDT, 2 hours 4 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE Norman OK 450 PM CDT Sun Jul 19 2020 OKZ004-010-192215- Woodward OK-Harper OK- 450 PM CDT Sun Jul 19 2020 ...SIGNIFICANT WEATHER ADVISORY FOR west central Woodward and southeastern Harper Counties Until 515 PM CDT... AT 446 PM CDT, a strong thunderstorm was located 4 miles north of Woodward, moving northeast at 20 MPH. HAZARDS INCLUDE... Hail up to the size of nickels... Wind gusts to 50 MPH... LAT...LON 3640 9946 3649 9955 3664 9935 3651 9920 TIME...MOT...LOC 2146Z 229DEG 20KT 3649 9943 JP
Local storm report, Jul 19, 5:21 PM CDT, 1 hour 33 minutes before
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</html>Local storm report, Jul 19, 5:35 PM CDT, 1 hour 19 minutes before
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</html>Special weather statement, Jul 19, 6:19 PM CDT, 35 minutes before
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</html>Special weather statement, Jul 19, 6:50 PM CDT, 4 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 19, 2:05 AM CDT | Special Weather Statement | OUN | Alfalfa, Harper, Woods | 40 min |
| Jul 19, 2:38 AM CDT | Special Weather Statement | OUN | Harper | 37 min |
| Jul 19, 3:24 AM CDT | Special Weather Statement | OUN | Harper | 36 min |
| Jul 19, 4:50 PM CDT | Special Weather Statement | OUN | Woodward | 25 min |
| Jul 19, 5:11 PM CDT | Severe Thunderstorm Warning | OUN | Harper, Woodward | 49 min |
| Jul 19, 5:41 PM CDT | Areal Flood Advisory | OUN | Woodward | 3 hr |
| Jul 19, 5:52 PM CDT | Severe Thunderstorm Warning | OUN | Woodward | 16 min |
| Jul 19, 6:19 PM CDT | Special Weather Statement | OUN | Ellis | 26 min |
| Jul 19, 6:50 PM CDT | Special Weather Statement | OUN | Ellis | 25 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 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.