Alert archive / Oklahoma / Special Weather Statements in 2021
Special Weather Statement, NWS Norman, OK
NWS Norman, OK issued this special weather statement at May 7, 2021, 6:42 PM CDT for Harper County, Oklahoma. It was in force for 33 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
- May 7, 2021, 6:42 PM CDT (23:42 UTC)
- Expired
- May 7, 2021, 7:15 PM CDT
- In force
- 33 min
- Issued by
- NWS Norman, OK
County Harper County, OK
The radar
The Dodge City radar (KDDC), 129 km from the middle of the area, began a volume at 23:46 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
Dodge City, (KDDC), launched 12:00Z, 11.7 hours before the alert went out and 129 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1488 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 674 m²/s²
- 0-3 km storm-relative helicity
- 886 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
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 May 7, 3:35 PM CDT, 3 hours 7 minutes earlier.
Area forecast discussion, May 7, 3:35 PM CDT, 3 hours 7 minutes before
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</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
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The site you requested is temporarily down for maintenance or an unexpected outage.
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</html>Hazardous weather outlook, May 7, 12:13 PM CDT, 6 hours 29 minutes before
Hazardous Weather Outlook National Weather Service Norman OK 1213 PM CDT Fri May 7 2021 OKZ004>048-050>052-TXZ083>090-081715- 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- 1213 PM CDT Fri May 7 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... Thunderstorms are expected to develop across the high plains to the west of Oklahoma. This activity will then move east toward western and northwestern Oklahoma late this afternoon and this evening. A few strong to severe storms will be possible with wind gusts of up to 65 mph and hail to the size of quarters being the main hazards. This activity is expected to weaken as it moves farther east during the evening hours. .Fire Weather... Warm and windy conditions will result in elevated fire weather conditions across parts of western Oklahoma and western north Texas this afternoon. .DAYS TWO THROUGH SEVEN...Saturday through Thursday... .Thunderstorms... There is a marginal risk of severe thunderstorms across portions of northern, central, and western Oklahoma, and western north Texas Saturday. Although a strong cap will inhibit the development of thunderstorms through much of the day Saturday. A few storms will be possible by Saturday evening along a dryline and an advancing cold front. Large hail and damaging wind gusts will be the primary hazards. Thunderstorm chances persist each day through Wednesday across portions of our area. A few strong storms will be possible Sunday across far southeast Oklahoma. Otherwise severe weather is not anticipated at this time beyond Sunday. .Fire weather... Fire weather conditions will be elevated over western Oklahoma and western north Texas Saturday afternoon with very warm temperatures, low humidity, and windy conditions. 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, May 7, 6:14 PM CDT, 28 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
614 PM CDT Fri May 7 2021
OKZ004-009-072345-
Harper OK-Ellis OK-
614 PM CDT Fri May 7 2021
...SIGNIFICANT WEATHER ADVISORY FOR southwestern Harper and
northwestern Ellis Counties Until 645 PM CDT...
AT 611 PM CDT, a strong thunderstorm was located 4 miles south of
Slapout, moving east at 40 MPH.
HAZARDS INCLUDE...
Hail up to one-half inch diameter...
Wind gusts to 50 MPH...
LAT...LON 3669 10000 3679 9970 3654 9960 3653 9961
3647 10000
TIME...MOT...LOC 2311Z 252DEG 36KT 3655 10011
MADSpecial weather statement, May 7, 6:42 PM CDT, 0 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE Norman OK 642 PM CDT Fri May 7 2021 OKZ004-005-009-010-080015- Woodward OK-Harper OK-Woods OK-Ellis OK- 642 PM CDT Fri May 7 2021 ...SIGNIFICANT WEATHER ADVISORY FOR northwestern Woodward... southeastern Harper...northwestern Woods and north central Ellis Counties Until 715 PM CDT... AT 639 PM CDT, a strong thunderstorm was located 4 miles northeast of May, moving east at 30 MPH. HAZARDS INCLUDE... Hail up to one-half inch diameter... Wind gusts to 50 MPH... LAT...LON 3650 9982 3686 9977 3690 9924 3643 9927 TIME...MOT...LOC 2339Z 268DEG 25KT 3665 9968 MAD
The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 7, 6:14 PM CDT | Special Weather Statement | OUN | Harper | 31 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.