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10News Forecast for Thursday, Dec. 21, 2023: Heavy rain tonight through Friday

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Get ready for a late-night downpour! We have a countywide flood watch until Fri. at 10 p.m.

We're expecting more activity late tonight. A large amount of rain will fall quickly, elevating the risk for low-lying flooding, mud, and landslides. The chance of thunder and lightning will also increase during this period.

Activity peaks overnight through early Friday, then showers become widespread, tapering off as we inch towards Friday evening. Estimated totals still have the coastal and inland communities collecting the most rain, up to 1.50" for spots like Oceanside and Vista.

Gusty winds will coincide with storm activity. Peak gusts out of the south and southeast will top close to 40mph, stronger especially when you factor in thunderstorm activity producing stronger downgusts.

Daytime highs will drop on Friday, with noticeable cooling through the weekend. By Saturday, we'll have partly sunny skies with mostly clear conditions by Sunday.

Then, on Christmas Day, we're looking towards a nice and cool afternoon with valley, desert, and coastal highs in the upper 60s and low 70s and mountain highs in the low 50s.

Friday's Highs:
Coast: 63-68
Valleys: 59-66
Mountains: 47-56
Deserts: 59-64

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