Thursday will be hot with highs in the mid to upper 90s and a heat index to the low 100s. Northeastern Oklahoma is under a HEAT ADVISORY with a heat index around 105. Lows in the low to mid 70s under mostly clear skies. Highs will climb to the mid 90s Friday with a heat index near 100. The heat dome slides away this weekend and temperatures slowly decrease closer to normal, near 90 degrees. Isolated storms are possible Sunday and Monday.