Alert archive / Oklahoma / Special Weather Statements in 2021
Special Weather Statement, NWS Norman, OK
NWS Norman, OK issued this special weather statement at Mar 12, 2021, 6:33 PM CST for Washita County, Oklahoma. It was in force for 27 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Mar 12, 2021, 6:33 PM CST (00:33 UTC)
- Expired
- Mar 12, 2021, 7:00 PM CST
- In force
- 27 min
- Issued by
- NWS Norman, OK
County Washita County, OK
The radar
The Altus AFB radar (KFDR), 113 km from the middle of the area, began a volume at 00:33 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, 0.6 hours before the alert went out and 163 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
- 910 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 646 m above ground
- 0-6 km bulk shear
- 63 kt
- 0-1 km storm-relative helicity
- 116 m²/s²
- 0-3 km storm-relative helicity
- 159 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 5.2
The text
As transmitted.
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</html>What forecasters said that day
The local office's own words before this special weather statement 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 special weather statement went out at Mar 12, 5:35 PM CST, 58 minutes earlier.
Area forecast discussion, Mar 12, 5:35 PM CST, 58 minutes before
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</html>Hazardous weather outlook, Mar 12, 12:26 PM CST, 6 hours 7 minutes before
Hazardous Weather Outlook National Weather Service Norman OK 1226 PM CST Fri Mar 12 2021 OKZ004>048-050>052-TXZ083>090-131200- 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- 1226 PM CST Fri Mar 12 2021 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... There is a slight risk of severe thunderstorms across most of western Oklahoma and portions of western north Texas. Golf ball size hail, damaging wind gusts over 60 mph are possible with the stronger storms. The strongest storms are expected across parts of southwestern Oklahoma and the adjacent area of western north Texas. The most likely time for severe weather will be from late this afternoon into the late evening hours. .DAYS TWO THROUGH SEVEN...Saturday through Thursday... .Thunderstorms... There is an enhanced risk of severe thunderstorms on Saturday, generally along and west of a line from Woodward to Altus and Vernon Texas. There is a slight and marginal risk of severe storms east of the enhanced risk. The eastern border of this area is the I-35 corridor. Severe thunderstorms are expected to develop across the Texas Panhandle during the mid afternoon as a strong storm system approaches from the west. Severe thunderstorms are expected to move into western Oklahoma and western north Texas by the late afternoon and early evening. The stronger storms will be capable of producing very large hail to the size of tennis balls, strong damaging wind gusts over 70 mph, and a few tornadoes. Thunderstorm intensity is expected to decrease as the storms move east during the evening, but will still pose a damaging wind and hail threat. .Flooding... Heavy rainfall may occur this afternoon and again Saturday evening and early Sunday morning could cause localized flooding. Areas closer to the Kansas border are more likely to have the most rain compared to areas farther south. 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, Mar 12, 5:37 PM CST, 56 minutes before
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</html>Special weather statement, Mar 12, 6:18 PM CST, 15 minutes before
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</html>Special weather statement, Mar 12, 6:33 PM CST, 0 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 |
|---|---|---|---|---|
| Mar 12, 6:15 PM CST | Areal Flood Advisory | OUN | Alfalfa, Blaine, Dewey, Garfield, Grant, Major | 3 hr |
| Mar 12, 6:18 PM CST | Special Weather Statement | OUN | Custer | 42 min |
| Mar 12, 6:38 PM CST | Flash Flood Warning | OUN | Alfalfa, Garfield, Grant, Major | 3 hr |
| Mar 12, 6:45 PM CST | Special Weather Statement | OUN | Blaine | 45 min |
| Mar 12, 7:05 PM CST | Special Weather Statement | OUN | Kay | 25 min |
| Mar 12, 7:18 PM CST | Areal Flood Advisory | OUN | Kay, Noble | 3 hr |
| Mar 12, 7:31 PM CST | Special Weather Statement | OUN | Blaine | 29 min |
| Mar 12, 7:35 PM CST | Areal Flood Advisory | OUN | Custer | 3 hr |
| Mar 12, 8:00 PM CST | Special Weather Statement | OUN | Blaine | 30 min |
| Mar 12, 8:07 PM CST | Severe Thunderstorm Warning | OUN | Blaine, Custer, Kingfisher | 38 min |
| Mar 12, 8:40 PM CST | Special Weather Statement | OUN | Noble | 35 min |
| Mar 12, 8:42 PM CST | Severe Thunderstorm Warning | OUN | Blaine, Kingfisher | 48 min |
| Mar 12, 9:26 PM CST | Severe Thunderstorm Warning | OUN | Kingfisher | 34 min |
| Mar 13, 1:19 AM CST | Special Weather Statement | OUN | Harmon | 26 min |
| Mar 13, 1:41 AM CST | Special Weather Statement | OUN | Harmon | 49 min |
| Mar 13, 2:31 AM CST | Special Weather Statement | OUN | Jackson | 29 min |
| Mar 13, 4:42 AM CST | Dense Fog Advisory | OUN | Alfalfa, Beckham, Blaine, Caddo, Canadian, Cleveland and 22 more | 7 hr |
| Mar 13, 7:54 AM CST | River Flood Advisory | OUN | Blaine, Canadian | 13 hr |
| Mar 13, 12:02 PM CST | Dense Fog Advisory | OUN | Alfalfa, Harper, Woods | 118 min |
| Mar 13, 2:08 PM CST | River Flood Advisory | OUN | Blaine, Caddo, Canadian, Custer | 39 hr |
| Mar 12, 9:16 PM CST | Severe Thunderstorm Warning | OUN | Foard | 44 min |
Nearby
Special Weather Statements in Oklahoma, 2021Every special weather statement in 2021
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.