Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 571, NWS Norman, OK

August 28, 2018Dewey County, Ellis County, Woodward County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Aug 28, 2018, 6:42 PM CDT for Dewey County, Ellis County, Woodward County, Oklahoma. It was in force for 78 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 28, 2018, 6:42 PM CDT (23:42 UTC)
Expired
Aug 28, 2018, 8:00 PM CDT
In force
78 min
Issued by
NWS Norman, OK
Area
Storm-based polygon
Hail
1.5 in
Wind
70.0 mph

Counties Dewey County, OK, Ellis County, OK, Woodward County, OK

The radar

The Vance AFB radar (KVNX), 124 km from the middle of the area, began a volume at 23:42 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.

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 28, 2:09 PM CDT, 4 hours 33 minutes earlier.

Area forecast discussion, Aug 28, 2:09 PM CDT, 4 hours 33 minutes before
<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</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>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>
Hazardous weather outlook, Aug 28, 11:49 AM CDT, 6 hours 53 minutes before
Hazardous Weather Outlook
National Weather Service Norman OK
1149 AM CDT Tue Aug 28 2018

OKZ004>048-050>052-TXZ083>090-291700-
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-
1149 AM CDT Tue Aug 28 2018

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 portions of northern
and west central Oklahoma late this afternoon and early evening
then spread southeast this evening and overnight. Some of the
storms could become strong to severe producing hail up to the size
of half dollars and wind gusts up to 65 mph. There is a Marginal
risk for severe storms along and northwest of line from Perry and
Kingfisher, to Weatherford and Hollis Oklahoma. The strong to
severe storms are expected to be primarily between 4 PM and 10
PM.

A few strong storms with gusty winds could be possible overnight
but the potential for severe storms will decrease late this
evening. Overall, heavy downpours and lightning will be the main
concerns.

.Heat...
Another very warm day is expected with heat index values reaching
between 95 and 105 this afternoon. Follow heat safety guidelines
and keep hydrated if you are outside.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday...

.Thunderstorms...
Thunderstorm chances will continue into Wednesday and Thursday,
although the potential of severe storms will be low. There will be
low chances of storms again Friday night through Monday.

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, Aug 28, 6:26 PM CDT, 16 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
626 PM CDT TUE AUG 28 2018

OKZ009-010-014-015-290000-
Woodward OK-Roger Mills OK-Dewey OK-Ellis OK-
626 PM CDT TUE AUG 28 2018

...SIGNIFICANT WEATHER ADVISORY FOR southern Woodward...northeastern
Roger Mills...northwestern Dewey and southeastern Ellis Counties
Until 700 PM CDT....

AT 623 PM CDT, strong thunderstorms were located 3 miles south of
Harmon and 9 miles northeast of Crawford, moving east at 25 MPH.

HAZARDS INCLUDE...
Wind gusts 40 to 50 MPH...
Heavy rain can lead to reduced visibility...

Locations impacted include...
Vici, Camargo, Sharon, Mutual and Harmon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

&&

LAT...LON 3632 9910 3589 9924 3585 9982 3627 9954
TIME...MOT...LOC 2323Z 250DEG 20KT 3610 9956 3594 9970

11

The office that day

Everything else NWS Norman, OK issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 28, 6:26 PM CDTSpecial Weather StatementOUNEllis34 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; radar from the NEXRAD Level II archive.