Heat Advisory: Alfalfa; Grant; Kay; Major; Garfield; Noble; Blaine; Kingfisher; Logan; Payne; Caddo; Canadian; Oklahoma; Lincoln; Grady; McClain; Cleveland; Pottawatomie; Seminole; Hughes; Stephens; Garvin; Murray; Pontotoc; Coal; Jefferson; Carter; Johnston; Atoka; Love; Marshall; Bryan

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Heat Advisory — Alfalfa; Grant; Kay; Major; Garfield; Noble; Blaine; Kingfisher; Logan; Payne; Caddo; Canadian; Oklahoma; Lincoln; Grady; McClain; Cleveland; Pottawatomie; Seminole; Hughes; Stephens; Garvin; Murray; Pontotoc; Coal; Jefferson; Carter; Johnston; Atoka; Love; Marshall; Bryan Severity: Moderate. Certainty: Likely. * WHAT...Heat index values up to 109 expected. * WHERE...Portions of central, east central, northern, northwest, southeast, southern, and southwest Oklahoma. * WHEN...From noon to 8 PM CDT Thursday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.