087
WWUS74 KOUN 181632
NPWOUN

URGENT - WEATHER MESSAGE
National Weather Service Norman OK
Issued by National Weather Service Tulsa OK
1132 AM CDT Tue Aug 18 2026

OKZ007-008-012-013-018>020-024>032-039>043-045>048-050>052-191500-
/O.NEW.KOUN.XH.W.0013.260819T1600Z-260820T0100Z/
/O.CON.KOUN.XH.W.0012.000000T0000Z-260819T0100Z/
Grant-Kay-Garfield-Noble-Kingfisher-Logan-Payne-Canadian-Oklahoma-
Lincoln-Grady-McClain-Cleveland-Pottawatomie-Seminole-Hughes-
Stephens-Garvin-Murray-Pontotoc-Coal-Jefferson-Carter-Johnston-Atoka-
Love-Marshall-Bryan-
Including the cities of Blackwell, Coalgate, Thackerville, Sulphur,
Norman, Perry, Stillwater, Wewoka, Wakita, Madill, Davenport,
Seminole, Wellston, Davis, Kingston, Stroud, Meeker, Marietta, Pauls
Valley, Lamont, Prague, Holdenville, Blanchard, Ardmore, Duncan,
Enid, Tishomingo, Atoka, Moore, Wetumka, El Reno, Yukon, Concho,
Ringling, Waurika, Mustang, Tuttle, Medford, Purcell, Ryan, Durant,
Oklahoma City, Guthrie, Ponca City, Chandler, Chickasha, Shawnee,
Kingfisher, Wynnewood, Ada, Okarche, Hennessey, Lindsay, Pond Creek,
and Newcastle
1132 AM CDT Tue Aug 18 2026

...EXTREME HEAT WARNING IN EFFECT FROM 11 AM TO 8 PM CDT WEDNESDAY...
...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM CDT THIS
EVENING...

* WHAT...For the first Extreme Heat Warning, dangerously hot
  conditions with heat index values up to 110. For the second Extreme
  Heat Warning, dangerously hot conditions with heat index values up
  to 110 expected.

* WHERE...Portions of central, east central, northern, southeast, and
  southern Oklahoma.

* WHEN...For the first Extreme Heat Warning, until 8 PM CDT this
  evening. For the second Extreme Heat Warning, from 11 AM to 8 PM
  CDT Wednesday.

* IMPACTS...Heat related illnesses increase significantly during
  extreme heat and high humidity events.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.

&&

$$

OKZ004>006-009>011-014>017-021>023-033>038-044-TXZ083>090-191500-
/O.NEW.KOUN.HT.Y.0039.260819T1600Z-260820T0100Z/
/O.CON.KOUN.HT.Y.0038.000000T0000Z-260819T0100Z/
Harper-Woods-Alfalfa-Ellis-Woodward-Major-Roger Mills-Dewey-
Custer-Blaine-Beckham-Washita-Caddo-Harmon-Greer-Kiowa-Jackson-
Tillman-Comanche-Cotton-Hardeman-Foard-Wilbarger-Wichita-Knox-Baylor-
Archer-Clay-
Including the cities of Frederick, Watonga, Okeene, Seymour, Walters,
Cordell, Quanah, Hinton, Hobart, Arnett, Scotland, Lawton, Cherokee,
Helena, Knox City, Weatherford, Clinton, Granite, Holliday, Sayre,
Burns Flat, Laverne, Taloga, Sheppard AFB, Carmen, Lakeside City,
Anadarko, Vici, Fargo, Altus, Temple, Leedey, Snyder, Hollis,
Buffalo, Seiling, Sentinel, Fairview, Gage, Mangum, Munday, Crowell,
Geary, Archer City, Vernon, Alva, Shattuck, Woodward, Wichita Falls,
Henrietta, Elk City, Cheyenne, and Hammon
1132 AM CDT Tue Aug 18 2026

...HEAT ADVISORY IN EFFECT FROM 11 AM TO 8 PM CDT WEDNESDAY...
...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM CDT THIS EVENING...

* WHAT...For the first Heat Advisory, heat index values up to 106.
  For the second Heat Advisory, heat index values up to 107 expected.

* WHERE...Portions of northwest, southwest, and western Oklahoma and
  northern Texas.

* WHEN...For the first Heat Advisory, until 8 PM CDT this evening.
  For the second Heat Advisory, from 11 AM to 8 PM CDT Wednesday.

* IMPACTS...Hot temperatures and high humidity may cause heat
  illnesses.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.

&&

$$