The National Weather Service Storm Prediction Center in Norman has issed a severe thunderstorm watch in effect until 9 p.m. for Adair, Alfalfa, Blaine, Canadian, Cherokee, Cleveland, Craig, Creek, Delaware, Garfield, Grady, Grant, Hughes, Kay, Kingfisher,  Lincoln, Logan, Major, Mays, McClain, McIntosh, Muskogee, Noble, Nowata, Okfuskee, Oklahoma, Okmulgee, Osage, Ottawa, Pawnee, Payne, Pottawatomie, Rogers, Seminole, Tulsa, Wagoner and Washington counties.