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Marine Weather and Tides Lagunitas-Forest Knolls, CA Version 3.4

NOTICE 10/9/2019 Updated the Marine Zones. 9/4/2019 Fixed the weather maps due to NOAA moving them. 7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports. 6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

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Sunrise 7:15AM

Sunset 4:52PM

Thursday December 12, 2019 2:28 AM PST (10:28 UTC)

Moonrise 5:35PM

Moonset 7:42AM

Illumination 100%

NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.

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7 Day Forecast for Marine Location Near Lagunitas-Forest Knolls CDP, CA

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Area Discussion for - San Francisco/Monterey Bay Area, CA

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FXUS66 KMTR 120603 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 1003 PM PST Wed Dec 11 2019

SYNOPSIS. Lingering light rain continues over the North Bay tonight, after scattered showers passed over the Bay Area earlier this evening. Light rain tapers off Thursday afternoon, but chances for rain returns on Friday and Saturday. Mild temperatures undergo a slow cooling trend toward the weekend. Sunday and Monday morning temperatures will be in the low to mid 40s. By the middle of next week, the forecast shifts back to an unsettled and rainy pattern.

DISCUSSION. as of 08:50 PM PST Wednesday . With consistent moisture from the Pacific continuing to move over the region, a weak short wave that moved over the Bay Area provided enough forcing to bring light to moderate rain to the Bay Area, particularly in the North Bay. Stratus clouds will sit comfortably over the region through the night. The zonal flow will continue tomorrow, so we can't completely rule out the chance of isolated light rain on Thursday. However, better chances are in the early morning due to lingering moisture and then will taper off in the afternoon as a pocket of dry air briefly moves over the region. Temperatures will remain in the 60s and trend cooler into the 50s toward the weekend under cloudy skies.

Regarding Friday into Saturday, we expect rain again for much of the Bay Area. But being only two days out, there is still inconsistency between models on timing. The Euro has it moving in on Friday in the late morning, the NAM has it Friday afternoon, and the GFS has it late on Friday evening. What we do know is that the synoptic guiding pattern bringing subtropical moisture to our region will continue and steady rain through Saturday morning is expected.

Saturday night into Sunday sees the next upper level trough pass over. This will bring in more cold air advection from the northwest allowing low temperatures to drop on Sunday morning. Widespread low- to-mid 40s is forecast with isolated low lying valleys of the North Bay, East Bay and Southern Monterey County is expected to drop into the 30s. Similar chilly temperatures are forecast for Monday morning as well.

In the long range: an upper level ridge builds in the early part of next week helping to drive a slight warm up. As we get closer to the date, models will resolve the magnitude of the brief change in temps. The main story though is what's behind the ridge. Models are beginning to hint at the sign of the next system, that could bring widespread rain for the Bay Area and along the Central Coast for the middle to end of next week.

AVIATION. as of 10:04 PM PST Wednesday . A series of shortwave disturbances will keep abundant low level moisture over the area through Thursday. MVFR cigs will persist with occasional IFR cigs in the valleys and the MRY Bay Area. Occasional light rain and drizzle can be expected mainly from the SFO Bay Area north which is where most of the moisture is. Winds will be light and generally out of the east or southeast.

Vicinity of KSFO . MVFR cigs with bases around 1500-2500 ft. Light southeast winds under 10 kt. Occasional light rain or drizzle.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . Areas of MVFR cigs around the area becoming more widespread after 08Z. Cigs lowering into IFR category at times. Light east to southeasterly winds under 10 kt.

MARINE. as of 09:44 PM PST Wednesday . Light southerly winds will prevail through Thursday before switching to west to northwest. Northwest winds will increase on Saturday as a cool upper trough passes to the north of the area. Large long-period northwest swell will impact the waters Thursday night through Saturday.

MTR WATCHES/WARNINGS/ADVISORIES. Tday. High Surf Advisory . CAZ006-505-509-529-530



PUBLIC FORECAST: DK AVIATION: W Pi MARINE: W Pi

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Weather Reporting Stations

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Stations	Dist	Age	Wind	Air Temp	Water Temp	Waves	Pressure	DewPt
PRYC1 - 9415020 - Point Reyes, CA	13 mi	59 min			54°F		1021.9 hPa
46237 - San Francisco Bar, CA (142)	15 mi	59 min			55°F	6 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA	16 mi	39 min	SW 5.8 G 7.8	57°F	56°F	6 ft	1023 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA	17 mi	54 min	ESE 5.1	57°F			1023 hPa
RCMC1 - 9414863 - Richmond, CA	18 mi	59 min	S 7 G 11	57°F	55°F		1021.8 hPa
FTPC1 - 9414290 - San Francisco, CA	19 mi	59 min	SSW 8 G 13	60°F	55°F		1022.5 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA	21 mi	59 min	SSE 8.9 G 12	59°F			1022.5 hPa
PXSC1	22 mi	59 min		57°F				57°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA	22 mi	59 min	E 8 G 8	57°F			1021.2 hPa
OBXC1	24 mi	59 min		58°F				58°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA	25 mi	59 min	SE 6 G 6
OKXC1 - 9414776 - Oakland (Berth 34), CA	25 mi	59 min	SSE 5.1 G 6	58°F			1022.4 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA	26 mi	59 min	E 8 G 9.9	55°F			1021.5 hPa
AAMC1 - 9414750 - Alameda, CA	27 mi	59 min	ESE 4.1 G 5.1	59°F	55°F		1022.5 hPa
LNDC1	27 mi	59 min	SSE 2.9 G 4.1	59°F			1022.4 hPa
UPBC1	33 mi	59 min	E 5.1 G 5.1
MZXC1 - 9415102 - Martinez-Amorco CA	33 mi	59 min	ENE 2.9 G 5.1	53°F	54°F		1022.3 hPa
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA	35 mi	39 min	WSW 5.8 G 7.8	56°F	56°F	8 ft	1022.4 hPa	55°F
PCOC1 - 9415144 - Port Chicago, CA	38 mi	59 min	ENE 4.1 G 5.1	53°F	53°F		1022 hPa
46214 - Point Reyes, CA (029)	38 mi	59 min			57°F	8 ft
SFXC1 - San Francisco Bay Reserve, CA	41 mi	104 min	S 1	53°F			1023 hPa
RTYC1 - 9414523 - Redwood City, CA	43 mi	59 min	SE 4.1 G 7	61°F	57°F		1022.9 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA	44 mi	39 min	SW 5.8 G 5.8	58°F	57°F	7 ft	1023.3 hPa	57°F
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA	45 mi	59 min	SSE 2.9 G 4.1	53°F			1022.3 hPa

Wind History for Point Reyes, CA

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Last 24hr

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Airport Reports

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Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
Novato / Gnoss Field, CA	15 mi	34 min	N 0	0.75 mi	Fog/Mist	55°F	55°F	100%	1022.7 hPa
Petaluma Municipal Airport, CA	20 mi	34 min	N 0	1.50 mi	Fog/Mist	55°F	55°F	100%	1022.7 hPa

Link to 5 minute data for KDVO

Wind History from DVO (wind in knots)

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Tide / Current Tables for Bolinas Lagoon, California

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Tide / Current Tables for Point Reyes, California Current

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Weather Map

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GEOS Local Image of CentralWestCoast    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East

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Wind Forecast for San Francisco/Monterey Bay Area, CA (5,6,7,8)

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Ground Weather Radar Station Sacramento, CA

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