HOT THIS WEEK. SHOWERS SURGE INTO CALIFORNIA BY THURSDAY.

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HEAT PEAKS TUESDAY, BUT WILL HANG AROUND

High pressure building into our region will push high temperatures above the century mark over much of the region Tuesday and potentially also Wednesday. Here are the forecast highs both days. (Images 1 and 2) If the marine breeze doesn’t develop, expect Wednesday to soar to near 100 in many places as well. The NWS has issued a heat advisory for Tuesday.

Temperatures Tuesday will be some 20 degrees above normal across the hottest areas of the inland North Bay. (Image 3)

All of this is part of a week-long warm up. Although Tuesday is likely to be the hottest day, warm temperatures from 90-100 in the hottest spots will be with us through the upcoming weekend. (Image 4)

Although weak to moderate offshore winds are forecast to develop over the North and East Bay peaks late Monday into Tuesday (25-35mph), they are not expected to be strong enough to reach advisory levels.

MONSOONAL MOISTURE PUSHES NORTH

The first major surge of monsoonal moisture to hit the desert southwest will surge into California by Thursday. You can see the forecast for that tropical moisture here. (Image 5)

The remnants of a tropical system will bring precipitable water values way above average to much of California. (Image 6)

By Thursday, showers with possible lightning are expected to be scattered across Southern California. (Image 7) By Friday, they may push into the Sierra. (Image 8)

The bulk of this activity should stay to our east. There is a very small chance that some of this moisture will bring showers, and a few embedded thunderstorms, to the northern half of California, but it’s unlikely at this point. We’ll keep you up-to-date.