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Marine Weather and Tides Cupertino, 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 7:12AM

Sunset 4:52PM

Saturday December 14, 2019 12:02 AM PST (08:02 UTC)

Moonrise 7:33PM

Moonset 9:34AM

Illumination 93%

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 Cupertino, CA

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

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FXUS66 KMTR 140532 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 932 PM PST Fri Dec 13 2019

SYNOPSIS. Chances of light rain will continue tonight and into this weekend as a disturbance moves across Northern California. Drier and colder conditions will prevail on Sunday, with frost possible Sunday night. An unsettled possibly wet pattern will likely to return by the middle of next week.

DISCUSSION. As of 9:05 PM PST Friday . A frontal system is moving into northern California this evening. The tail end of the front has bringing some light rain to the area since this afternoon. Rain has been limited to the North Bay and over the higher terrain. The coastal North Bay has had reports of almost 1/2 inch of rain otherwise amounts have been very light. Rain will taper off later this evening but abundant low level moisture will keep mostly cloudy conditions through Saturday.

An upper level trough moves into northern California Saturday night. There will be a slight chance of rain over the northern part of the CWA but the main effect of this trough will be to bring in colder drier air into the area which should clear out the low level moisture that has been over us for many days. With the clearing skies comes colder temperatures. Highs for the upcoming week will be in the mid to upper 50s. Lows will get down into the 30s and lower 40s Sunday and Monday nights with upper 20s in the coldest spots. Patchy morning frost will be possible.

Medium range models are coming into more agreement with the 12Z ECMWF more in line with the GFS in bringing a low pressure system into the area Tuesday night and Wednesday. The 00Z GFS has been consistent in handling this system and if the 00Z ECMWF does the same then there will be growing confidence for midweek rain.

AVIATION. as of 09:32 PM PST Friday . For 06z tafs. Mixed conditions this evening with conditions ranging from VFR to IFR with cigs between 1,000 and 3,500 ft AGL in addition to higher clouds at around 10,000 ft AGL. Light showers continue across the region and will linger into tomorrow before tapering off from north to south. Pushed back the lowering of cigs a bit in the latest taf package. Still believe MVFR/IFR conditions will develop overnight, but timing is uncertain. Patchy fog in the North Bay also remains a possibility, although confidence is low. Observations and satellite will be monitored and tafs will be updated as needed. Should cigs lower, do expect them to gradually lift late tomorrow morning before some clearing in the afternoon. Patchy lower cigs will redevelop into tomorrow evening as another weak disturbance moves through.

Winds have now mainly shifted out of the SW/W and will continue to become more W/NW overnight. W/NW winds will increase tomorrow morning and afternoon with locally breezy winds possible around KSFO.

Vicinity of KSFO . Cigs have lowered now to MVFR with still high clouds aloft. Difficult to see the extent of lower clouds at the surface, but expecting MVFR conditions to prevail overnight before cigs lift tomorrow morning. SW winds will continue tonight before shifting out of the W by tomorrow morning at around 10-15 kt with gusts to around 20 kt in the afternoon.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . VFR conditions currently with showers still in the vicinity. Satellite shows IFR cigs so far have remained offshore, but expecting cigs to lower over the next few hours. IFR conditions expected overnight with cigs lifting in the morning. Confidence is low on timing of lowering and lifting cigs. Generally light winds expected through tonight with increasing W/NW winds late tomorrow morning.

MARINE. as of 08:02 PM PST Friday . Southwest winds will gradually shift out of the northwest overnight as a weak trough and cold front move through the waters. Light showers will linger overnight and through tomorrow. Winds will increase tomorrow across the waters ahead of another weak system. Hazardous seas conditions will persist through tomorrow due to a large long period northwest swell. Swell heights and periods will gradually decrease over the weekend.

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



PUBLIC FORECAST: W Pi AVIATION: AS MARINE: AS

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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	16 mi	44 min	WNW 2.9 G 6	57°F	58°F		1019.7 hPa
AAMC1 - 9414750 - Alameda, CA	34 mi	44 min			56°F
LNDC1	36 mi	44 min	W 9.9 G 13	56°F			1019 hPa
OBXC1	37 mi	44 min		56°F				56°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA	37 mi	44 min	W 11 G 14
MLSC1 - Moss Landing, South Harbor, CA	38 mi	28 min	W 5.1 G 12	56°F			1020 hPa (+0.0)	55°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA	38 mi	44 min	W 8.9 G 14	56°F			1018.1 hPa
PXSC1	38 mi	44 min		57°F				57°F
ELXC1 - Elkhorn Slough Reserve, CA	38 mi	77 min	Calm	56°F			1021 hPa	56°F
OKXC1 - 9414776 - Oakland (Berth 34), CA	38 mi	44 min	W 11 G 13	56°F			1019 hPa
46092 - MBM1	39 mi	55 min	W 7.8	57°F	57°F		1019.1 hPa (-0.3)
FTPC1 - 9414290 - San Francisco, CA	40 mi	50 min	W 6 G 9.9	56°F	55°F		1019.3 hPa
46042 - MONTEREY - 27NM West of Monterey Bay, CA	40 mi	32 min	WNW 9.7 G 16	57°F	57°F		1019.9 hPa	56°F
46114 - West Monterey Bay, CA	43 mi	32 min			57°F	11 ft
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA	44 mi	32 min	NW 14 G 18	57°F	57°F		1020.1 hPa	55°F
PPXC1 - 9414847 - Richmond (Point Potrero), CA	44 mi	44 min	W 6 G 7	57°F			1019.3 hPa
46237 - San Francisco Bar, CA (142)	45 mi	32 min			55°F	9 ft
TIBC1 - Tiburon Pier, San Francisco Bay, CA	45 mi	27 min	SW 7	54°F			1019 hPa
RCMC1 - 9414863 - Richmond, CA	46 mi	44 min			55°F
46240 - Cabrillo Point, Monterey Bay, CA (158)	48 mi	32 min			58°F	5 ft

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
San Jose, San Jose International Airport, CA	8 mi	69 min	N 0	10.00 mi	Mostly Cloudy	56°F	53°F	90%	1019 hPa
Palo Alto Airport, CA	12 mi	3.3 hrs	WSW 6	10.00 mi	Overcast	57°F	51°F	82%	1019.6 hPa
San Jose / Reid / Hillv, CA	13 mi	2.1 hrs	Var 3	8.00 mi	Mostly Cloudy	55°F	53°F	94%	1019.6 hPa
San Carlos Airport, CA	18 mi	62 min	W 3	7.00 mi	Overcast	57°F	55°F	94%	1019.6 hPa
Hayward, Hayward Air Terminal, CA	24 mi	68 min	W 9	7.00 mi	Light Rain	57°F	54°F	90%	1019.8 hPa

Link to 5 minute data for KNUQ

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Tide / Current Tables for Upper Guadalupe Slough, 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 (3,6,7,8)

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Ground Weather Radar Station San Francisco Bay Area, CA

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