RAPID HEAT-UP FOR NORTH BAY TUESDAY. ADVISORIES IN EFFECT.

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Northern California’s temperatures will soar beginning on Tuesday as strong high pressure moves over the state. However the heatwave should be short-lived with temperatures moderating again by the end of the week (still in the upper 80s).

Despite that, some areas of the North Bay could top the 100 degree mark Tuesday and Wednesday, prompting the NWS to issue a heat advisory for Tuesday, Wednesday and Thursday.

Meanwhile, the Golden State had partly cloudy skies on Monday as a storm to the north brought heavy rain to parts of Oregon and Washington.

On Tuesday strong high pressure will build in quickly from south to north, with the center of the high pressure ridge expected to be directly over our region.

That will bring a rapid and intense warmup, with high temperatures on Tuesday soaring 20 degrees in many locations around the North Bay. The hottest areas will top out between 95-103 degrees.

This is the European model estimate of high temps on Tuesday. You can see the lobe of 100 degree heat pushing into the North Bay from the Valley. Only the immediate coast will stay in the 60s and 70s.

A Heat Advisory has been issued for the entire region, except for the immediate coastal areas, from early Tuesday through Thursday.

By Friday the axis of the high pressure ridge that brought us heat will shift east, allowing lower pressure to nudge in from the northwest (blue). As a result, our temperatures will begin to moderate a bit, with afternoons topping out in the upper 80s to about 90 through Sunday.

Here is how the NWS is forecasting temperatures through next Monday, with a bit of cooling in the North Bay on Thursday and Friday, but temperatures remaining in the mid to upper 80s through the weekend across inland areas of the North Bay.