The heat is on for your first week of the summer season! Skies are clear and we're starting out very warm this morning. Valley and foothill areas are starting out in the 60's to 70's, while mountain areas are in the 40's to 50's this morning. A Heat Advisory will be going into effect at noon today and is set to last through 8pm on Saturday night. The Heat Advisory will be in place because temperatures will be staying 10 to 20 degrees above average for most of this week. Winds will shift to become out of the South this afternoon, but we are not expecting much if any relief from the Delta Breeze. Skies will stay sunny through the day and temperatures will end up in the 102 to 110 degree range in the valley today. Foothill and mountain areas will top out in the 90's to low triple digits this afternoon.
The ridge of high pressure over the Southwest will continue to be the main dominant feature of your forecast through this entire week, but an area of low pressure passing through the Pacific Northwest will help to bring the potential for showers and thunderstorms to Northern California Tuesday and Wednesday afternoon and evenings. That threat will mainly be limited to the Sierra. Aside from the threat of thunderstorms we'll be staying hot and dry all week. Valley temperatures will start out in the 70's and top out in the 100 to 110 degree range through Saturday. Foothill areas will start out in the 60's to 70's, and end up in the 95 to 105 degree range through Saturday. Mountain areas will start out in the 50's and end up in the 90's to triple digits through Saturday. We'll finally have low pressure moving into the West Coast on Sunday and that will put an end to the triple digit heat across our region, but we'll still be in the mid to high 90's in the valley on Sunday. Foothill and mountain areas will still top out in the mid 80's to low 90's on Sunday afternoon.