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Marine Weather and Tides Colma, 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 7:13AM

Sunset 4:52PM

Thursday December 12, 2019 10:50 AM PST (18:50 UTC)

Moonrise 5:34PM

Moonset 7:40AM

Illumination 99%

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 Colma, CA

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

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FXUS66 KMTR 121754 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 954 AM PST Thu Dec 12 2019

SYNOPSIS. Light rain will linger over the region through the morning before diminishing in coverage later in the day. Rain chances increase again Friday into Saturday with temperatures turning colder Sunday into Monday. An unsettled and wet pattern will likely return by middle of next week.

DISCUSSION. as of 9:36 AM PST Thursday . Lots of drizzle or light rain reports this morning as zonal flow aloft continues to bring moisture into the state. Expect on and off drizzle through the day, but decreasing overnight.

By late Friday into Saturday, moisture advection will again increase over the northern and central California coast ahead of an upper level system that will drop southward over the region. This will bring renewed chances for light to moderate rain first developing over the North Bay early Friday before spreading southward Friday night. The best chances for rainfall will be over the greater San Francisco Bay Area with lesser chances for the Central Coast. Unsettled (showery) conditions could persist into Saturday before drying out late Saturday night into Sunday.

Conditions will dry out and temperatures will turn cooler Sunday into early next week as a colder air mass moves over the area from the north. Looking for more widespread 30s and 40s for overnight lows from Saturday night into Monday night. Will need to watch for the potential for areas of frost or even freezing temperatures in the region's coldest interior valleys early next week.

While the operational models continue to differ in the details heading into the latter part of next week, the ensembles do indicate a return to unsettled and wet conditions with the potential for more widespread rainfall across the region during the extended forecast period.

AVIATION. as of 9:50 AM PST Thursday . for 18z TAFs. Low to mid-level stratus clouds surround the Bay Area and the Central Coast. Mostly widespread MVFR conditions but occasional IFR, even isolated terminals at LIFR, is possible as moisture from the ocean continues to move over the area. Less than 10 kts winds will prevail across all terminals. Isolated, very light on and off rain showers persist, but will be too weak to for extended showers that could wet runways. After sunset, forecast is for cigs to lower once again as MVFR continues trending toward IFR, locally LIFR-VLIFR overnight.

Vicinity of KSFO . Light winds prevail. MVFR conditions with cigs around 1500 feet as stratus clouds sit over the region. A passing shower is possible through the TAF period, but nothing for long durations. Lowering cigs is forecast tonight trending to IFR conditions.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . Winds are light with cigs around 1500 feet providing mostly MVFR conditions. Cigs should improve somewhat this afternoon but persist with MVFR. Light, passing showers are possible through the TAF period, but nothing long enough to wet runways. Tonight sees cigs lower once again to borderline LIFR/IFR overnight.

MARINE. as of 09:41 AM PST Thursday . Southerly winds remain light and will prevail through Thursday before switching to west to northwest. By Friday night, northwest winds will increase as the next storm system moves in. A large long-period northwest swell will impact the waters through Saturday. Hazardous conditions for small craft vessels will exist with this arriving northwest swell due to steep large seas.

MTR WATCHES/WARNINGS/ADVISORIES. Tday. High Surf Advisory . CAZ006-505-509-529-530 SCA . Pt Arena to Pt Reyes 0-10 nm from 10 AM SCA . Pt Reyes to Pigeon Pt 0-10 nm from 10 AM SCA . Pigeon Pt to Pt Pinos 0-10 nm from 10 AM SCA . Pt Pinos to Pt Piedras Blancas 0-10 nm from 10 AM SCA . Pt Arena to Pigeon Pt 10-60 nm from 10 AM SCA . Pigeon Pt to Pt Piedras Blancas 10-60 nm from 10 AM



PUBLIC FORECAST: Sims AVIATION: DK MARINE: DK

Visit us at www.weather.gov/sanfrancisco

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Weather Reporting Stations

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Stations	Dist	Age	Wind	Air Temp	Water Temp	Waves	Pressure	DewPt
PXOC1 - 9414311 - San Francisco (Pier 1), CA	8 mi	50 min	N 1.9 G 2.9	57°F			1025.4 hPa (+1.8)
PXSC1	9 mi	50 min		59°F				59°F
AAMC1 - 9414750 - Alameda, CA	9 mi	50 min			55°F
FTPC1 - 9414290 - San Francisco, CA	9 mi	56 min	WNW 4.1 G 5.1	57°F	55°F		1026.4 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA	10 mi	50 min	Calm G 1	57°F			1026.4 hPa (+1.6)
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA	10 mi	62 min	Calm G 1
OBXC1	10 mi	50 min		58°F				58°F
LNDC1	11 mi	50 min	SSE 4.1 G 5.1	60°F			1026.3 hPa (+1.6)
46237 - San Francisco Bar, CA (142)	14 mi	50 min			55°F	8 ft
TIBC1 - Tiburon Pier, San Francisco Bay, CA	15 mi	51 min	W 5.1	58°F			1027 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA	16 mi	50 min	SSW 7 G 8	59°F			1026.7 hPa (+1.7)
RTYC1 - 9414523 - Redwood City, CA	16 mi	50 min	NNW 1 G 1.9	61°F	57°F		1026.9 hPa (+1.6)
RCMC1 - 9414863 - Richmond, CA	17 mi	50 min			55°F
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA	23 mi	30 min	S 3.9 G 3.9	57°F	56°F		1027 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA	27 mi	50 min	WSW 5.1 G 7	58°F			1026.1 hPa (+2.0)
MZXC1 - 9415102 - Martinez-Amorco CA	29 mi	56 min	NNE 2.9 G 4.1	53°F	54°F		1026.3 hPa
UPBC1	29 mi	50 min	NE 2.9 G 4.1
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA	33 mi	30 min	S 5.8 G 7.8	58°F	57°F		1026.9 hPa	57°F
PCOC1 - 9415144 - Port Chicago, CA	33 mi	50 min	NE 6 G 6	54°F	53°F		1026.1 hPa (+1.9)
PRYC1 - 9415020 - Point Reyes, CA	37 mi	50 min			54°F		1026.2 hPa (+1.7)
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA	38 mi	50 min	ESE 4.1 G 5.1	55°F			1026.3 hPa (+1.7)
SFXC1 - San Francisco Bay Reserve, CA	42 mi	65 min	SSW 1	54°F			1026 hPa

Wind History for Alameda, CA

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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	5 mi	54 min	ESE 5	10.00 mi	Overcast	61°F	57°F	87%	1026.1 hPa
Oakland, Metro Oakland International Airport, CA	11 mi	57 min	S 5	10.00 mi	Overcast	63°F	55°F	78%	1026.5 hPa
Half Moon Bay Airport, CA	12 mi	55 min	SSE 5	3.00 mi	Fog/Mist	57°F	57°F	100%	1027.1 hPa
San Carlos Airport, CA	14 mi	55 min	N 0	10.00 mi	Overcast	61°F	59°F	94%	1026.7 hPa
Hayward, Hayward Air Terminal, CA	16 mi	56 min	S 4	10.00 mi	Overcast	62°F	57°F	84%	1027.3 hPa
Palo Alto Airport, CA	21 mi	63 min	SSE 3	10.00 mi	Mostly Cloudy	63°F	57°F	83%	1026.4 hPa

Link to 5 minute data for KSFO

Wind History from SFO (wind in knots)

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Tide / Current Tables for South San Francisco, San Francisco Bay, California

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Tide / Current Tables for Sierra Point 1.3 mi ENE, South San Francisco Bay, 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 (13,3,4,5)

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Ground Weather Radar Station San Francisco Bay Area, CA

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