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Frost Watch in Interior SLO County, High Wind Warning in Santa Barbara County
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Frost Watch in Interior SLO County, High Wind Warning in Santa Barbara County

Weather news:

-Large systems crossing the western United States will bring multiple episodes of strong to destructive winds and dangerous fire weather conditions to parts of California over the next few days.

-The forecast will remain rather dry until next week.

Detailed forecast:

Significant jet energy extends across the back of a slowly eastward-moving upper trough over the Great Basin early this weekend.

A jet trail will enter the base of the trough Saturday evening and Sunday over Arizona, leaving Southern California with extensive surface ridge formation from California’s Central Valley into the Great Central Basin.

Strong upper-level support and offshore pressure gradients Sunday will support damaging wind gusts of 60 to 80 mph northwest to north from the I-5 corridor through the Ventura County Mountains to the Interior Mountains of Santa Barbara County and east of Santa. Ynez Range from tonight until Sunday afternoon.

As a result, a high wind warning has been issued for Santa Barbara County until 6 p.m. Sunday.

On Sunday, the eastward movement of the surface ridge across the central Great Basin will turn more sharply offshore.

In turn, winds will shift to the northeast, with stronger winds focusing on areas prone to Santa Ana winds.

Downstream drying under this pattern will combine with strong to destructive winds to produce critical fire weather conditions.

Light to medium winds are expected to ease later Monday and Tuesday.

Minimal temperature changes are expected from day to day, with a slight warming trend early in the coming week.

High temperatures by Tuesday are expected to be in the 70s in most areas.

In conjunction with the aforementioned expansion of surface ridges in the middle of the drying deep layer profile, significant nighttime radiative cooling will allow Sunday night’s low temperatures to reach the 30-32°F range, ensuring monitoring frost for the southern Salinas Valley, interior valleys of San Luis Obispo County, and Antelope Valley.

Otherwise, the strong drying induced by subsidence will prevent the development of precipitation.