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Marine Weather and Tides Muir Beach, CA Version 3.4

NOTICE 12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed. 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.

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Sunrise 5:58AM

Sunset 8:33PM

Tuesday July 14, 2020 12:16 AM PDT (07:16 UTC)

Moonrise 12:35AM

Moonset 2:08PM

Illumination 36%

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 Muir Beach, CA

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

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FXUS66 KMTR 140550 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 1050 PM PDT Mon Jul 13 2020

SYNOPSIS. A few additional degrees of inland cooling is expected on Tuesday as onshore flow increases and high pressure weakens. Temperatures will then likely remain near seasonal averages for the remainder of the week and into next weekend. Expect increasing night and morning low clouds through midweek.

DISCUSSION. As of 9:15 PM PDT Monday . An upper ridge centered over the Desert Southwest has been weakening since yesterday. This resulted in a rapid deepening of the marine layer, which is currently about 2000 feet deep per the Fort Ord Profiler. In addition, onshore surface pressure gradients have increased since yesterday. These developments allowed marine air to penetrate well inland, resulting in high temperatures today that were as much as 20 degrees cooler than Sunday. The most significant cooling occurred in the interior valleys. Temperatures today settled back to near seasonal averages in most areas, and were even cooler than average in some coastal locations.

Evening satellite imagery reveals low clouds have already developed well inland from Monterey Bay and are nearly reaching Pacheco Pass. Low clouds have also begun to develop in the East and North Bay. We can expect more widespread morning low clouds for inland areas over the next few days.

As we move into Tuesday and Wednesday, the models develop weak southerly low level flow along our coast, which will result in further cooling in locations that typically cool under southerly flow such as Santa Rosa, Santa Cruz, and Big Sur.

A weak upper trough is forecast to to develop near the West Coast by Thursday and this will maintain normal, to slightly cooler than normal, temperatures through the end of the work week and into next weekend.

Monsoon moisture is forecast to increase across the Sierra by Thursday and maybe drift farther west. However, based on latest model data, this moisture is not likely to impact our area.

AVIATION. as of 10:49 PM PDT Monday . for 06z TAFs. Stratus clouds are already moving over regional terminals dropping conditions to MVFR. Expect continued widespread IFR/MVFR conditions as the marine layer thickens overnight. Clouds should begin to disperse after 17z. Mostly VFR Tuesday with traditional breezy afternoon winds, but clouds will linger near coastal terminals.

Vicinity of KSFO . MVFR at KOAK already with SCT clouds around 1500 ft AGL at KSFO. Clouds are expected to increase and lower through the evening for IFR conditions as winds have eased. Clouds should dissipate after 17z on Tuesday with breezier onshore winds expected in the afternoon, with gustier winds funneled through the North Bay.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . Clouds cover has already brought IFR conditions (MVFR at KSNS, but only just). Clouds will continue to lower through the evening for widespread IFR. There is a possibility of LIFR at KMRY but there is low confidence. Clouds will linger around the peninsula for much of Tuesday and winds will increase in the afternoon.

MARINE. as of 8:38 PM PDT Monday . Northwest winds prevail over the northern and outer coastal waters, with occasional stronger gusts possible. These winds will generate steep fresh swell resulting in hazardous conditions for small craft vessels. Winds will also be strong on Tuesday through the Golden Gate on toward the Delta. Winds are forecast to shift to the south midweek for the southern and inner coastal waters as the next system approaches. A longer period south swell will mix with the steep fresh northwest swell.

MTR WATCHES/WARNINGS/ADVISORIES. Tngt. SCA . Pt Arena to Pigeon Pt 10-60 nm SCA . Pt Arena to Pt Reyes 0-10 nm SCA . SF Bay until 11 PM



PUBLIC FORECAST: Dykema AVIATION: DK MARINE: DK

Visit us at www.weather.gov/sanfrancisco

Follow us on Facebook, Twitter, and YouTube at: www.facebook.com/nwsbayarea www.twitter.com/nwsbayarea www.youtube.com/nwsbayarea

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Weather Reporting Stations

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Stations	Dist	Age	Wind	Air Temp	Water Temp	Waves	Pressure	DewPt
46237 - San Francisco Bar, CA (142)	2 mi	47 min			55°F	4 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA	9 mi	27 min	W 7.8 G 9.7	54°F		6 ft	1013.2 hPa	52°F
FTPC1 - 9414290 - San Francisco, CA	11 mi	47 min			60°F
TIBC1 - Tiburon Pier, San Francisco Bay, CA	14 mi	37 min	S 11	55°F			1012 hPa
RCMC1 - 9414863 - Richmond, CA	17 mi	47 min			65°F
AAMC1 - 9414750 - Alameda, CA	20 mi	47 min			70°F
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA	31 mi	27 min	WNW 9.7 G 14	57°F		7 ft	1014.1 hPa	54°F
RTYC1 - 9414523 - Redwood City, CA	31 mi	47 min			75°F
MZXC1 - 9415102 - Martinez-Amorco CA	34 mi	47 min			70°F
PCOC1 - 9415144 - Port Chicago, CA	38 mi	47 min			73°F
46214 - Point Reyes, CA (029)	43 mi	21 min			50°F	9 ft
SFXC1 - San Francisco Bay Reserve, CA	45 mi	92 min	W 11
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA	47 mi	27 min	NW 16 G 19	52°F	51°F	8 ft	1011.6 hPa	50°F

Wind History for San Francisco, CA

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Last 24hr

SW8 G17

SW4 G12

S5 G9

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SW7 G15

SW9 G12

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SW4 G9

SW7 G11

SW6 G16

SW13 G19

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SW12 G20

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SW8 G18

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1 day ago

SW4 G8

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SW17 G22

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SW10 G21

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2 days ago

SW5 G9

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W6 G11

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SW15 G25

SW17 G24

SW21 G27

SW21 G26

SW14 G22

SW13 G17

S4 G8

SW4 G12

W6 G9

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Airport Reports

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Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
San Francisco, San Francisco International Airport, CA	20 mi	21 min	WNW 6	10.00 mi	A Few Clouds	58°F	50°F	75%	1012.5 hPa
Half Moon Bay Airport, CA	21 mi	22 min	S 5	5.00 mi	Fog/Mist	55°F	51°F	88%	1013.9 hPa
Oakland, Metro Oakland International Airport, CA	24 mi	24 min	WSW 8	10.00 mi	Partly Cloudy	61°F	53°F	75%	1012.8 hPa

Link to 5 minute data for KSFO

Wind History from SFO (wind in knots)

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W16 G21

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Calm

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NW15 G24

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NW16

NW12

NW13

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Tide / Current Tables for San Francisco Bar, California

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Tide / Current Tables for South Channel, San Francisco Bay Approach, 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 (3,6,7,8)

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Ground Weather Radar Station San Francisco Bay Area, CA

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