Point Arena to Point Reyes CA out 10 NM Marine Forecast
|Today...Nw Winds 20 To 30 Kt With Gusts Up To 35 Kt. Wind Waves 11 To 13 Ft. Swell Sw Around 2 Ft At 17 Seconds.|
|Tonight...Nw Winds 20 To 30 Kt With Gusts Up To 35 Kt. Wind Waves 11 To 13 Ft. Swell Sw Around 2 Ft At 17 Seconds.|
|Sat...Nw Winds 15 To 25 Kt With Gusts Up To 35 Kt. Wind Waves 9 To 11 Ft. Swell Sw Around 2 Ft At 16 Seconds.|
|Sat Night...Nw Winds 15 To 25 Kt With Gusts Up To 30 Kt. Wind Waves 9 To 10 Ft. Swell Sw Around 2 Ft At 15 Seconds.|
|Sun...Nw Winds 20 To 30 Kt With Gusts Up To 35 Kt. Wind Waves 8 To 9 Ft. Swell S Around 2 Ft At 16 Seconds.|
|Sun Night...Nw Winds 20 To 30 Kt With Gusts Up To 35 Kt. Wind Waves 9 To 10 Ft. Swell S Around 2 Ft At 15 Seconds.|
|Mon...Nw Winds 20 To 30 Kt With Gusts Up To 35 Kt. Wind Waves 7 To 8 Ft. W Swell Around 2 Ft And S Around 2 Ft.|
|Tue...Nw Winds 15 To 25 Kt With Gusts Up To 30 Kt. Wind Waves 7 To 8 Ft. W Swell Around 2 Ft And S Around 2 Ft.|
| Area Forecast Discussion|
National Weather Service San Francisco Bay Area
1114am PDT Fri May 20 2022
Gusty northerly winds will persist across the interior through Friday with elevated fire weather concerns developing. Seasonably warm and dry weather continues for this weekend into early next week.
As of 09:13am PDT Friday...Webcams and satellite imagery show a nice start to your Friday with ample sunshine. The bigger storyNear Term - Rest Of Today Through Tonight
actually the winds and elevated fire weather concerns. A look at pressure gradients around the region reveal some impressive readings. The N-S (SFO-ACV) gradient is sitting at -9mb and peaked over -10mb overnight. A rule of thumb is anything over -6mb to -7mb will result in gusty winds over the waters and limit low clouds sneaking into San Francisco Bay. Needless to say, the strong N-S is producing strong winds over the waters and hills. Mt St Helena peaked at 73 mph early this morning. Other locations gusted in the 30-50 mph range. Will keep the Wind Advisory as is for now. The northerly winds are also ushering in drier air with humidity readings at or less than 30%. The combination of gusty winds and lower humidity will result in elevated fire concerns today.
No update needed this morning...
As of 03:00am PDT Friday...Satellite imagery showing mostly clear sky conditions over the region this evening. Just a few passing high clouds can be observed over the Bay Area which will continue to push southward across the Central Coast through the remainder of the morning. Temperatures are also running a few to as much as 10 deg F cooler compared to 24 hours ago as a much drier air mass settles into the region. The dry, northerly flow continues to produce gusty winds greater than 40 mph in the higher terrain across the interior, especially in the North Bay and East Bay regions. With this, will continue the Wind Advisory in effect through 2pm Friday for interior North Bay Mountains and much of the East Bay including the northern Diablo Range and interior valleys. This said, the strongest wind gusts remain in elevations greater than 2,500 feet as of this hour. Wind speeds are anticipated to increase as a weak "inside slider" digs southward across the Great Basin. Will monitor observations and trends through the morning for any needed adjustments or cancellations to the advisory.
Otherwise, look for slightly cooler temperatures across the region this afternoon as a result of the cooler and much drier air mass aloft. Still expecting interior areas to warm into the upper 70s to lower 80s (mostly across the North Bay) this afternoon with widespread 70s elsewhere. Meanwhile, onshore flow near the coast will keep temperatures in the 60s. The main concern for the day will be the very dry surface conditions with relative humidity dropping into the teens and twenties for most locations away from the immediate coastline. These dry conditions combined with the breezy northerly winds will result in near-critical fire weather conditions.
A gradual warming trend is then anticipated for the upcoming weekend as high pressure over the eastern Pacific builds toward the coast. While dry conditions will also prevail, wind speeds ease a bit and overnight humidity recoveries will rebound. Thus, fire weather concerns will lessen a bit through the upcoming weekend. Will monitor to see if a shallow marine layer is able to develop during the weekend which will help keep conditions in the 60s near the coast while interior areas warm back into the 70s to low/mid 80s.
Forecast ensembles suggest a strengthening ridge and warming air mass aloft heading into early next week as well. This will likely bring interior areas into the mid/upper 80s and even lower 90s in the region's warm spots for the first half of the upcoming week. This warm-up looks to be short lived as troughing develops over the Pacific Northwest and northern California late next week and into the Memorial Day weekend. Thus, look for near normal temperatures along with continued dry weather in the extended.
as of 10:46am PDT Friday...Strong northwest winds across the waters through the day with gale force gusts in the northern outer waters. Winds diminish Saturday but remain near gale force in the northern outer waters. These winds will generate steep fresh swell at periods of 9 to 11 seconds through the weekend as the sea state remains wind driven. Winds are expected to restrengthen early next week.
NOAA San Francisco Bay Area Office: Watches - Warnings - Advisories
Wind Advisory...CAZ504-510-514-515 Small Craft Advisory...Pigeon Point to Point Pinos 0-10 nm
Small Craft Advisory...Point Pinos to Point Piedras Blancas 0-10 nm
GALE WARNING...Point Arena to Pigeon Point 10-60nm
Small Craft Advisory...Point Arena to Point Reyes 0-10nm
Small Craft Advisory...Pigeon Point to Piedras Blancas 10-60 nm
Small Craft Advisory...Point Reyes to Pigeon Point 0-10 nm
Small Craft Advisory...Monterey Bay
from 1 PM