Point Arena to Point Reyes CA out 10 NM Marine Forecast
|Today...Sw Winds 10 To 15 Knots, Becoming Nw 15 To 20 Knots This Afternoon. Wind Waves 3 To 4 Ft...Building To 5 To 7 Ft This Afternoon. W Swell 9 To 11 Ft At 15 Seconds. Rain.|
|Tonight...N Winds 10 To 15 Knots. Wind Waves 4 To 5 Ft. W Swell 9 To 11 Ft At 14 Seconds.|
|Fri...Nw Winds 10 To 15 Knots With Gusts Up To 25 Knots. Wind Waves 4 To 5 Ft. W Swell 8 To 10 Ft At 13 Seconds.|
|Fri Night...N Winds 10 To 15 Knots. Wind Waves 3 To 4 Ft. W Swell 6 To 8 Ft At 12 Seconds.|
|Sat...Ne Winds Around 5 Knots. Wind Waves 2 To 3 Ft. Nw Swell 5 To 7 Ft At 12 Seconds.|
|Sat Night...N Winds Around 5 Knots. Wind Waves 3 To 4 Ft. W Swell 3 To 5 Ft At 16 Seconds.|
|Sun...N Winds 5 To 10 Knots. Wind Waves 3 To 4 Ft. W Swell 5 To 7 Ft.|
|Mon...Nw Winds 10 To 15 Knots. Wind Waves 4 To 5 Ft. W Swell 3 To 5 Ft.|
| Area Forecast Discussion|
National Weather Service San Francisco CA 1026am PST Thu Dec 7 2023
Issued at 837am PST Thu Dec 7 2023
Rain is beginning to move into the North Bay this morning and will sweep across the Bay Area between 11am - 2 PM. This system will then reach the Central Coast between 1pm - 4pm while it begins to dissipate. Rainfall amounts will be light across the North Bay and then tapper downward as one heads to the south.
Have also added the North Bay Valleys to the Freeze Watch for Saturday morning. Otherwise, forecast remains on track this morning.
.SHORT TERM... (Today and tonight) Issued at 355am PST Thu Dec 7 2023
Scattered showers continue across the region in the post-frontal environment. Very weak instability (<100 J/kg), but elevated nonetheless will result in some showers bringing locally heavier rainfall rates. A cell moved over the office in Monterey earlier tonight, dumping 0.11" over the airport in just a few minutes. Scattered showers will linger through the early morning hours. Another weakening cold front will pass through later this morning/afternoon, which will prolong the chances for showers through the evening today. As unsettled weather across the Pacific NW settles down with the upper level trough exiting the region today, this will likely be the last rain the Bay Area and Central Coast gets until mid to late Dec (with the exception of a transient shortwave trough bringing small chances over the waters Monday).
After the cold frontal passage this afternoon, ridge of high pressure will start to build in. The colder airmass is already here, and under the growing influence of high pressure allowing for clear skies late tonight into Friday, colder overnight lows are expected. A Frost Advisory is now in effect for the North Bay Valleys and S Salinas Valley and San Benito Co. NBM continues to feature a high probability (70-90%) of sheltered areas along the 101 corridor of Sonoma Co dipping to freezing temps. These temperatures will be hazardous for vulnerable populations and sensitive vegetation.
(Friday through Wednesday) Issued at 355am PST Thu Dec 7 2023
High pressure will remain the main driver of weather for us through the weekend. Clear skies and lighter winds Friday night into Saturday will allow for more efficient radiational cooling. Higher confidence for widespread lows in the upper 30s across the interior valleys of the Bay Area early Sat with isolated low to mid 30s. Isolated spots in interior Monterey Co an San Benito Co have a high prob of dipping into the upper 20s Sat morning. As such, a Freeze Watch has been issued for the S Salinas Valley and San Benito Co. We'll be keeping our eye on potentially issuing a frost product (widespread lows between 33 and 36) for the Santa Clara Valley for early Sat, but confidence in how widespread the low to mid 30s will be is still low currently.
Warming trend is expected through early next week, which will bring an end to the cold nights. Highs by Tuesday will be in the mid to upper 60s across the region, running 5 to 10 degrees above normal for mid Dec.
(Today through Tuesday) Issued at 837am PST Thu Dec 7 2023
Northwest winds increase along a band of showers that will move through the waters this afternoon. Elevated seas between 12-15 feet will persist through late week as a series of long period northwest swells propagate through the waters, resulting in hazardous conditions for small crafts.
Issued at 404am PST Thu Dec 7 2023
With swell heigheights and periods diminishing to 11 to 13 feet at 15 seconds and continuing to diminish, high surf advisory was allowed to expire at 4am this morning. However, larger breaking waves and a turbulent surf zone will linger through the day today, so continue to use caution if going to the beach and give yourself more distance from the water.
NOAA San Francisco Bay Area Office: Watches - Warnings - Advisories
CA...Frost Advisory from midnight tonight to 9am PST Friday for CAZ506-516-518.
Freeze Watch from late Friday night through Saturday morning for CAZ506-516-518.
PZ...Small Craft Advisory until 9am PST Friday for Pigeon Pt to Pt Pinos 0-10 nm-Pt Arena to Pt Reyes 0-10 nm-Pt Reyes to Pigeon Pt 0-10 nm.
Small Craft Advisory until 3am PST Saturday for Pt Pinos to Pt Piedras Blancas 0-10 nm.
Small Craft Advisory until 9pm PST Friday for Pigeon Pt to Pt Pinos 10-60 NM-Pt Arena to Pt Reyes 10-60 NM.