A large upper level low pressure area centered over Iowa this afternoon will begin to open up and lift over the Great Lakes on Thursday. The positive tilted trailing trough will drag across Oklahoma early on Friday. By Saturday, the weather pattern across the country will transition to mostly zonal flow with a low amplitude ridge over the Rockies and the strongest flow aloft spreading eastward along the Canada/U.S. border. The ridge will shift eastward over the Plains on Sunday as the next major system to affect the Plains organizes near the west coast. This system will likely result in severe weather over the Plains over a several day period during the coming week as we enter a climatologically favorable period for severe thunderstorms.
No precipitation is expected in Oklahoma through the weekend. Surface high pressure will gradually be replaced as pressure falls occur over the High Plains, eventually evolving into organized low pressure over Western Kansas on Sunday. The result will be weakening northwest winds on Thursday, fairly light winds on Friday, and increasing south winds on Saturday and Sunday.
The headline weather story for Oklahoma will be a rapid warming trend, with hot conditions expected across portions of the state on Saturday and Sunday. Thursday may see some frost across Northern and Eastern Oklahoma with afternoon highs once again below normal. Even cooler conditions will be possible on Friday morning when frost will be possible across the northeast half of the state, and a light freeze may occur over Northeast Oklahoma. Highs on Friday will be a little closer to normal. A big warm up will start on Saturday when most places in Oklahoma will see highs in the 80s and Southwest Oklahoma will see highs in the 90s. The warming trend will continue Sunday when 90′s will be possible across the western half of the state. By Monday, some temperatures over far Southwest Oklahoma could reach 100 degrees.
Thursday morning: 39
Friday morning: 37
Saturday morning: 49
Sunday morning: 59