Triple Digit Heat Tuesday, then Cooler
Sunshine and highs in the mid to upper 90s were enjoyed this Labor Day. The weekend was nice as well with hot temperatures and a few high clouds. Upper level high pressure, that has been prevalent for such a long time now, is about to give way to a trough of low pressure. This new feature will become the primary weather system in the west for most of the 10-day forecast period. The trough will begin to be noticed on Wednesday with cooler air coming into the county on brisk westerly winds- especially in the mountain and desert regions.
But Tuesday will be the final day of this hot episode. Temperatures should approach 100° on Tuesday in the south valley ahead of the cooling trend. No clouds are forecast through the end of this week. A stronger re-enforcing low pressure system is now predicted for early next week, taking temperatures even lower. Partly cloudy skies are possible, but no rain is forecast anywhere in the county at this time. It will turn breezy with south valley highs barely touching 90° by this time next week.