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Marine Weather and Tides Mountain View, 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 6:18AM

Sunset 8:08PM

Sunday August 9, 2020 12:48 PM PDT (19:48 UTC)

Moonrise 10:33PM

Moonset 10:58AM

Illumination 67%

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 Mountain View, CA

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

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FXUS66 KMTR 091808 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 1108 AM PDT Sun Aug 9 2020

SYNOPSIS. Warmer temperatures are expected to continue through the remainder of the weekend, especially inland. Slightly cooler weather returns early next week.

DISCUSSION. as of 09:00 AM PDT Sunday . The ongoing forecast remains on track this morning with temperatures already warming into the 60s to even lower 70s at this hour. This is a result of a shallow marine layer that also brought about more widespread coastal fog earlier this morning. Look for low clouds and fog to dissipate through mid-morning and give way to mostly sunny and warmer conditions this afternoon. For additional details, please see the previous forecast discussion below.

PREV DISCUSSION. As of 3:00 AM PDT Sunday . A weak upper low lies just off the central California coast while upper level highs cover the eastern Pacific and the southern United States. The marine layer has compressed to near 1000 ft this morning and there is less inland penetration of the low clouds. With the lower marine layer areas of fog can be expected along the coast through midmorning. Already getting reports of visibilities below 1 mile at Half Moon Bay and 1/2 mile at Watsonville. Easterly flow aloft around the upper low is bringing high clouds from the Sierras which are remnants of afternoon convection.

Temperatures will be a few degrees warmer today with highs ranging from the upper 60s to low 70s at the coast to the 90s inland. May hit 100 in some of the warmest locations. 500 mb heights will start to fall Monday as an upper level trough over British Columbia drops south and flattens the upper ridge. This will begin a cooling trend that will last into the middle of the week with temperatures returning to near normals by Tuesday and Wednesday.

A couple of things of interest to watch in the long range. The upper high over the south is forecast to shift west to Arizona by next weekend resulting in more significant warming inland. Also will be watching a tropical system off Mexico moving northwest during the week that could possibly bring some mid and high moisture into southern or central California by next weekend as it rotates around the upper high.

AVIATION. As of 11:05 AM PDT Sunday . for 18z TAFs. The rather compressed marine layer evacuated to the coastline by late morning. Widespread VFR with generally light winds are expected today. Locally breezy conditions through coastal gaps of up to 10 to 15kt are expected by later this afternoon to early evening. For tonight, the marine layer will be further compressed, thinning the layer, and pushing bases even lower. As a result, more terminals are anticipated to remain VFR SKC tonight however the distribution of fog and associated reductions in visby are more of a threat tonight, particularly at KMRY/KSNS. Mix out times tomorrow morning in the 1500-1630Z time range are expected.

Vicinity of KSFO . VFR today. NNE winds late this morning before switching back to onshore at around 15 kt around 2230-2300Z, similar to yesterday. For tonight, KSFO will be on the periphery of the compressed marine layer with low confidence on if the airport will see BKN/OVC cigs in the LIFR-IFR range. Will need to watch satellite closely to establish trends later today.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . VFR today, compressed marine layer returns around 04Z tonight. Compressed marine layer will bring high likelihood of FG at terminals with drastic reductions in visibility, though the layer will be too thin for a significant impact from DZ. Rapid clearing by 16Z expected due to thin layer.

MARINE. as of 11:03 AM PDT Sunday . Split flow continues with predominately southerly winds along the coast and southern outer waters and diminishing northerly winds in the northern outer waters. Locally hazardous seas conditions will persist over the northern outer waters into this evening. Meanwhile, locally breezy winds are expected this afternoon and evening over the northern San Francisco Bay near the Golden Gate and to the Delta. Mixed seas will continue through the period with a short period northwest swell and a longer period southerly swell.

MTR WATCHES/WARNINGS/ADVISORIES. Tday. SCA . Pt Arena to Pigeon Pt 10-60 nm SCA . SF Bay from 3 PM



PUBLIC FORECAST: RGass/W Pi AVIATION: DRP MARINE: DRP

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
RTYC1 - 9414523 - Redwood City, CA	9 mi	54 min	N 6 G 8	68°F	74°F		1014.4 hPa
AAMC1 - 9414750 - Alameda, CA	26 mi	54 min	W 6 G 8	67°F	69°F		1014.1 hPa
LNDC1	27 mi	54 min	NW 5.1 G 7	67°F			1014 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA	28 mi	54 min	WNW 8 G 8.9
OBXC1	29 mi	60 min		61°F				61°F
OKXC1 - 9414776 - Oakland (Berth 34), CA	29 mi	54 min	WNW 11 G 13	60°F			1014.1 hPa
PXSC1	30 mi	54 min		65°F				59°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA	30 mi	54 min	WSW 8 G 9.9	66°F			1013.2 hPa
FTPC1 - 9414290 - San Francisco, CA	33 mi	54 min	WSW 1.9 G 12	58°F	64°F		1014.7 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA	35 mi	54 min	SSW 12 G 15	61°F			1014.4 hPa
46237 - San Francisco Bar, CA (142)	38 mi	48 min			61°F	5 ft
RCMC1 - 9414863 - Richmond, CA	38 mi	54 min	S 5.1 G 7	65°F	65°F		1013.8 hPa
UPBC1	41 mi	54 min	NW 9.9 G 15
MZXC1 - 9415102 - Martinez-Amorco CA	41 mi	54 min	WNW 13 G 14	73°F	70°F		1012.9 hPa
PCOC1 - 9415144 - Port Chicago, CA	42 mi	54 min	W 7 G 8.9	75°F	70°F		1012.7 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA	42 mi	54 min	NNW 12 G 15	77°F			1012.5 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA	43 mi	54 min	WNW 5.1 G 6	70°F			1013.4 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA	44 mi	28 min	S 7.8 G 12	58°F			1015 hPa	57°F
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA	46 mi	28 min	S 5.8 G 9.7	55°F	56°F		1015.1 hPa
MLSC1 - Moss Landing, South Harbor, CA	47 mi	47 min	W 7 G 20	57°F			1015 hPa	56°F
ELXC1 - Elkhorn Slough Reserve, CA	47 mi	63 min	W 8	62°F				58°F
46042 - MONTEREY - 27NM West of Monterey Bay, CA	49 mi	28 min	S 5.8 G 9.7	57°F	59°F		1015.3 hPa	57°F

Wind History for Redwood City, CA

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Airport Reports

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Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
Palo Alto Airport, CA	4 mi	61 min	N 5	10.00 mi	Clear	72°F	60°F	69%	1013.9 hPa
San Jose, San Jose International Airport, CA	9 mi	55 min	N 0	10.00 mi	Fair	80°F	55°F	42%	1013.1 hPa
San Carlos Airport, CA	11 mi	61 min	NNE 7	10.00 mi	Clear	68°F	62°F	83%	1013.9 hPa
Hayward, Hayward Air Terminal, CA	15 mi	54 min	W 5	10.00 mi	Fair	77°F	57°F	52%	1014.3 hPa
San Jose / Reid / Hillv, CA	15 mi	61 min	N 0	10.00 mi	Clear	82°F	53°F	37%	1013.5 hPa
Oakland, Metro Oakland International Airport, CA	19 mi	55 min	NW 7	10.00 mi	A Few Clouds	74°F	59°F	60%	1013.9 hPa
San Francisco, San Francisco International Airport, CA	20 mi	52 min	N 7	10.00 mi	A Few Clouds	71°F	59°F	66%	1013.6 hPa
Livermore, Livermore Municipal Airport, CA	21 mi	55 min	SW 7	10.00 mi	Fair	87°F	52°F	30%	1012.3 hPa
Half Moon Bay Airport, CA	24 mi	53 min	S 10	2.50 mi	Fog/Mist	59°F	55°F	88%	1015.2 hPa

Link to 5 minute data for KNUQ

Wind History from NUQ (wind in knots)

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Tide / Current Tables for Calaveras Point, west of, San Francisco Bay, California

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Tide / Current Tables for Dumbarton Point 2.3 mi NE, 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 (15,3,4,5)

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Ground Weather Radar Station San Francisco Bay Area, CA

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