Issued Zones: The Inland Empire …
Site: Southern California Weather Force has issued a Frost Advisory effective now for tonight into Friday morning …
Date: 12/26/19 at 1:55pm PT
Forecast: Dry air behind the departing system with a weak offshore flow will bring temperatures to frost criteria early Friday morning. SCWF Frost Forecast Model shows the regions of expectance.
There is a miss for the Norco/Mira Loma areas and this is likely due to a bit more of sinking air in the in the offshore flow. Other areas surrounding it from Rancho, San Bernardino, and the Perris/Temecula/Hemet/Banning areas will have the frost criteria with wind sheltered zones.
Zones affected will be along I-15 as far south as Fallbrook and Escondido. If you have plants, do what you do during a frost advisory to protect them.
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Forecaster: KM