979
WWUS74 KOUN 201704
NPWOUN
URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE NORMAN OK
1204 PM CDT THU AUG 20 2026
OKZ024-025-027>032-039-045-210715-
/O.UPG.KOUN.HT.Y.0040.260820T1800Z-260821T0100Z/
/O.EXB.KOUN.XH.W.0014.260820T1800Z-260822T0200Z/
CANADIAN-OKLAHOMA-GRADY-MCCLAIN-CLEVELAND-POTTAWATOMIE-SEMINOLE-
HUGHES-STEPHENS-JEFFERSON-
INCLUDING THE CITIES OF PURCELL, BLANCHARD, WETUMKA, CHICKASHA,
HOLDENVILLE, EL RENO, WEWOKA, YUKON, MOORE, WAURIKA, NORMAN, SHAWNEE,
TUTTLE, NEWCASTLE, SEMINOLE, RYAN, OKLAHOMA CITY, MUSTANG, CONCHO,
RINGLING, AND DUNCAN
1204 PM CDT THU AUG 20 2026
..EXTREME HEAT WARNING IN EFFECT UNTIL 9 PM CDT FRIDAY
* WHAT...DANGEROUSLY HOT CONDITIONS WITH HEAT INDEX VALUES UP TO 110
EXPECTED.
* WHERE...CANADIAN, CLEVELAND, GRADY, MCCLAIN, OKLAHOMA,
POTTAWATOMIE, SEMINOLE, HUGHES, JEFFERSON, AND STEPHENS COUNTIES.
* WHEN...UNTIL 9 PM CDT FRIDAY.
* 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.
OKZ040>043-046>048-050>052-210715-
/O.EXT.KOUN.XH.W.0014.260820T1800Z-260822T0200Z/
GARVIN-MURRAY-PONTOTOC-COAL-CARTER-JOHNSTON-ATOKA-LOVE-MARSHALL-
BRYAN-
INCLUDING THE CITIES OF PAULS VALLEY, LINDSAY, DURANT, SULPHUR,
DAVIS, ARDMORE, COALGATE, MARIETTA, WYNNEWOOD, THACKERVILLE, ADA,
ATOKA, MADILL, KINGSTON, AND TISHOMINGO
1204 PM CDT THU AUG 20 2026
..EXTREME HEAT WARNING NOW IN EFFECT UNTIL 9 PM CDT FRIDAY
* WHAT...DANGEROUSLY HOT CONDITIONS WITH HEAT INDEX VALUES UP TO 111
EXPECTED.
* WHERE...PONTOTOC, ATOKA, BRYAN, COAL, JOHNSTON, MARSHALL, CARTER,
GARVIN, LOVE, AND MURRAY COUNTIES.
* WHEN...UNTIL 9 PM CDT FRIDAY.
* 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.
OKZ006>008-011>017-020>022-210715-
/O.EXB.KOUN.HT.Y.0040.260820T1800Z-260822T0200Z/
ALFALFA-GRANT-KAY-MAJOR-GARFIELD-NOBLE-ROGER MILLS-DEWEY-CUSTER-
BLAINE-PAYNE-BECKHAM-WASHITA-
INCLUDING THE CITIES OF ELK CITY, WAKITA, CHEROKEE, SAYRE, SEILING,
TALOGA, WEATHERFORD, HELENA, STILLWATER, CORDELL, WATONGA, PONCA
CITY, ENID, PERRY, CHEYENNE, MEDFORD, BURNS FLAT, POND CREEK, LAMONT,
FAIRVIEW, VICI, HAMMON, OKEENE, GEARY, CARMEN, BLACKWELL, SENTINEL,
LEEDEY, AND CLINTON
1204 PM CDT THU AUG 20 2026
..HEAT ADVISORY IN EFFECT UNTIL 9 PM CDT FRIDAY
* WHAT...HEAT INDEX VALUES UP TO 106 EXPECTED.
* WHERE...PORTIONS OF CENTRAL, NORTHERN, NORTHWEST, AND WESTERN
OKLAHOMA.
* WHEN...UNTIL 9 PM CDT FRIDAY.
* 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.
OKZ018-019-023-026-033>038-044-TXZ083>090-210715-
/O.EXT.KOUN.HT.Y.0040.260820T1800Z-260822T0200Z/
KINGFISHER-LOGAN-CADDO-LINCOLN-HARMON-GREER-KIOWA-JACKSON-TILLMAN-
COMANCHE-COTTON-HARDEMAN-FOARD-WILBARGER-WICHITA-KNOX-BAYLOR-ARCHER-
CLAY-
INCLUDING THE CITIES OF DAVENPORT, SCOTLAND, SEYMOUR, HOLLIS,
GRANITE, WALTERS, QUANAH, WELLSTON, TEMPLE, MUNDAY, CHANDLER, KNOX
CITY, ARCHER CITY, HENNESSEY, HOLLIDAY, ANADARKO, PRAGUE, SNYDER,
LAKESIDE CITY, HINTON, HENRIETTA, SHEPPARD AFB, STROUD, GUTHRIE,
VERNON, OKARCHE, CROWELL, WICHITA FALLS, MANGUM, FREDERICK, LAWTON,
KINGFISHER, MEEKER, HOBART, AND ALTUS
1204 PM CDT THU AUG 20 2026
..HEAT ADVISORY NOW IN EFFECT UNTIL 9 PM CDT FRIDAY
* WHAT...HEAT INDEX VALUES UP TO 109 EXPECTED.
* WHERE...PORTIONS OF CENTRAL AND SOUTHWEST OKLAHOMA AND NORTHERN
TEXAS.
* WHEN...UNTIL 9 PM CDT FRIDAY.
* 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.
MAD
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