.LONG TERM...
(Wednesday through Monday)
Issued at 407 AM PST Tue Dec 17 2024
The offshore boundary level flow will persist through Thursday
evening with high temperatures in the 60s to mid-70s across interior
valleys. Thursday into Friday a shift in the pattern will result in
increased southerly flow up to 30kts at H85 Friday morning into the
afternoon, as H50 heights begin to drop out ahead of a broad
deepeningtrough to our west. The first of two waves of
precipitation will arrive late Friday night, brushing the the North
Bay with light rain, expected to be under a tenth of an inch. The
second wave associated with the trough axis moving onshore across
NorCal and southern Oregon will bring more impactful rainfall, with
the North Bay now highlighted by the WPC in the Day 5 Excessive Rain
Outlook for moderate to heavy rain possible Saturday afternoon
through late Saturday night. The active longwave synoptic pattern
looks to continue through and beyond the extended forecast. Get out
enjoy the pleasant weather the next few days.
