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August 27, 2019 – Hot weather continues today, then slight cooling for the remainder of the week. Slight chance of thunderstorms tonight and Wednesday.

Discussion

Clear skies over interior NorCal early this morning other than a few high clouds beginning to spread northward from central California.

Current temperatures are on the mild side and generally range from the upper 40s to lower 50s in the colder mountain valleys to the 70s and lower 80s across the Central Valley.

Very little change in forecast thinking compared to 24 hours ago. The hot pattern continues today with the strong broad ridge keeping the marine layer suppressed.

Still some potential for elevated convection tonight into Wednesday as high level moisture and tropical remnants move north into NorCal (satellite imagery indicates some enhanced clouds offshore of central California), but strong lifting mechanism not evident as broad weakening circulation moves north (mainly offshore to our west).

If storms develop, they will be high-based with little precipitation.

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Slight cooling possible the second half of the week as the ridge shifts east in response to several short-waves moving by to the north. This pattern may allow a return of a more robust Delta Breeze to at least southern portions of the forecast area.

Extended Discussion (Saturday through Tuesday)

Dry weather continues in the extended period as the upper ridge across the southwest US continues to extend over northern California.

An upper trough approaches the PacNW late this weekend, although deterministic models runs continue to vary on the strength of this system and whether this feature will influence temperatures for NorCal early next week.

High temperatures for the weekend into early next week are forecast to be near and slightly above normal.