Friday, January24, 2020
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Marine Weather and Tides
Saratoga, 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.

Sunrise 7:15AMSunset 5:24PM Friday January 24, 2020 6:18 PM PST (02:18 UTC) Moonrise 7:22AMMoonset 5:21PM Illumination 0% Phase: New Moon; Moon at 29 days in cycle
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.
Marine Forecasts
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PZZ531 San Francisco Bay South Of The Bay Bridge- 201 Pm Pst Fri Jan 24 2020
Rest of today..W winds around 5 kt.
Tonight..N winds around 5 kt.
Sat..N winds up to 10 kt. Patchy fog.
Sat night..SW winds 5 to 15 kt. Rain likely.
Sun..W winds 5 to 15 kt. A chance of rain.
Sun night..NW winds up to 10 kt.
Mon..W winds up to 10 kt.
Tue..NW winds around 5 kt.
PZZ500 201 Pm Pst Fri Jan 24 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Generally light winds with southerly winds over the northern waters and north to northwest winds over the southern waters. Locally breezy winds are expected along the big sur coast the rest of the afternoon south of point sur. Winds will then become west to southwest late Saturday and into Sunday as the next system approaches. A long period west to northwest swell will continue to impact the waters peaking today and tomorrow. This will create conditions hazardous to small crafts. Additional long period northwest swells will arrive this weekend and early next week.


7 Day Forecast for Marine Location Near Saratoga, CA
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location: 37.29, -122.05     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 250011 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 411 PM PST Fri Jan 24 2020

SYNOPSIS. Another weak front will pass over the region tonight with some sprinkles possible for the North Bay but mainly dry conditions are expected overall. A warm front will bring some light rain chances to the North Bay late Saturday, spreading south across the rest of the Bay Area Saturday night into early Sunday. Rain amounts will be light overall with a drying trend Sunday afternoon through early next week as temperatures trend to above normal.

DISCUSSION. as of 1:42 PM PST Friday . Fog finally cleared but it was stubborn in a few locations, not clearing until late morning. Satellite imagery shows mostly clear skies from about the San Francisco Bays southward, with increasing clouds across the North Bay. Current temperature trends are similar to or slightly warmer than those from yesterday at this time with upper 50s to mid 60s across the area. A weak impulse is progged to bring rain chances to mainly the North Bay tonight, otherwise areas of valley fog are expected to form again tonight. Overnight lows will be mild, with mid 40s to lower 50s expected.

High pressure will briefly rebuild over the area allowing for another round of night/morning fog followed by mild afternoon temperatures on Saturday with highs in the 60s. The ridge will weaken later in the day as a weak front approaches. Light rain chances will return to the North Bay late in the day Saturday. Rain chances increase and eventually spread southward Saturday night through Sunday. Rainfall amounts over the weekend will generally be a few hundredths to a tenth or two. Highest rainfall amounts will be over the North Bay and up to nearly three quarters of an inch there at most.

Another very weak impulse will bring another chance for light rain to the North Bay late Monday into Tuesday. Dry weather is then expected for the rest of the week and possibly beyond as a blocking ridge pattern sets up over the west. The latest 8-14 day climate outlooks from the Climate Prediction Center indicate moderate-to-high probabilities of above normal temperatures and below normal precip for the period of January 31 through February 6th.

AVIATION. as of 4:10 PM PST Friday . For 00Z TAFs. VFR conditions are anticipated across most of the area this evening. Mid to high clouds are increasing ahead of another weak boundary moving into the Bay Area tonight. Clouds will lower overnight, becoming MVFR. IFR cigs are anticipated across much of the area early Saturday morning as low level moisture increases. Fog is also possible as models indicate the near surface conditions will be nearly saturated. Locally dense fog is possible across the North and East Bay as well as around Monterey Bay. Lower confidence on dense fog potential around the Bay Area terminals. Scattered showers are likely this evening across the North Bay and a few isolated showers may make it south into the Bay Area. VFR conditions are generally expected Saturday afternoon, with SCT to BKN clouds between 3,000 and 5,000 ft AGL. Winds should remain generally light with typical terrain and diurnal patterns through Saturday afternoon.

Vicinity of KSFO . Onshore winds will continue through the evening and gradually decrease. An isolated shower is possible this evening. MVFR cigs returning around 07z to 08z lowering to IFR around 12z. Potential is there for fog Saturday morning and dense fog cannot be ruled out. Periods of LIFR cigs are also possible. Conditions will improve Saturday afternoon, but SCT to BKN clouds 2,000-4,000 ft AGL will persist. Light northeast winds Saturday morning becoming onshore in the afternoon.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . VFR will continue through the early evening. Low clouds will increase later this evening and overnight with mainly MVFR cigs prevailing, however periods of IFR are also possible. Patchy fog will redevelop Saturday morning and may impact the terminals. VFR conditions expected Saturday afternoon. Generally light winds through the period with offshore winds tonight and onshore Saturday afternoon.

MARINE. as of 8:48 AM PST Friday . Generally light winds today with southerly winds over the northern waters and north to northwest winds over the southern waters. Locally breezy winds are expected along the Big Sur Coast today south of Point Sur. Winds will then become west to southwest late Saturday and into Sunday as the next system approaches. A long period west to northwest swell will move through the waters peaking today and tomorrow. This will create conditions hazardous to small crafts. Additional long period northwest swells will arrive this weekend and early next week.

MTR WATCHES/WARNINGS/ADVISORIES. Tngt. SCA . Mry Bay from 9 PM SCA . Pigeon Pt to Pt Pinos 0-10 nm from 9 PM SCA . Pt Arena to Pt Reyes 0-10 nm SCA . Pt Reyes to Pigeon Pt 0-10 nm SCA . Pt Pinos to Pt Piedras Blancas 0-10 nm SCA . Pt Arena to Pigeon Pt 10-60 nm SCA . Pigeon Pt to Pt Piedras Blancas 10-60 nm



PUBLIC FORECAST: Sims AVIATION: ST MARINE: AS

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 17 mi49 min 58°F 54°F1020.7 hPa
AAMC1 - 9414750 - Alameda, CA 36 mi49 min 53°F
46092 - MBM1 37 mi62 min WNW 12 56°F 55°F1019.5 hPa (-0.5)
ELXC1 - Elkhorn Slough Reserve, CA 37 mi94 min WNW 1.9 56°F 1019 hPa54°F
LNDC1 37 mi49 min 58°F 1020.5 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 38 mi67 min W 8 G 9.9
46042 - MONTEREY - 27NM West of Monterey Bay, CA 39 mi29 min NW 12 G 16 55°F 55°F9 ft1020.8 hPa54°F
OBXC1 39 mi49 min 56°F 56°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 39 mi49 min 56°F 1020.4 hPa
PXSC1 40 mi49 min 59°F 56°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 40 mi49 min 57°F 1019.4 hPa
46114 - West Monterey Bay, CA 42 mi49 min 55°F10 ft
FTPC1 - 9414290 - San Francisco, CA 42 mi55 min 54°F 54°F1020.6 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 44 mi29 min NW 3.9 G 7.8 55°F 55°F10 ft1021.7 hPa54°F
46237 - San Francisco Bar, CA (142) 46 mi49 min 53°F8 ft
PPXC1 - 9414847 - Richmond (Point Potrero), CA 46 mi49 min 57°F 1020.9 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 47 mi56 min Calm 56°F 1021 hPa
46240 - Cabrillo Point, Monterey Bay, CA (158) 47 mi49 min 55°F4 ft
RCMC1 - 9414863 - Richmond, CA 48 mi49 min 53°F
MEYC1 48 mi43 min 56°F1020.5 hPa

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Jose, San Jose International Airport, CA8 mi26 minNW 710.00 miMostly Cloudy58°F52°F81%1020.3 hPa
San Jose / Reid / Hillv, CA13 mi92 minWNW 510.00 miMostly Cloudy63°F51°F68%1020 hPa
Palo Alto Airport, CA14 mi2.5 hrsNNW 610.00 miMostly Cloudy61°F53°F77%1020.7 hPa
San Carlos Airport, CA20 mi24 minNW 510.00 miMostly Cloudy59°F53°F82%1020.7 hPa

Link to 5 minute data for KSJC

Wind History from SJC (wind in knots)
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Last 24hrCalmNW4CalmNW5SE3SE3NW3NW3S4CalmCalmCalmSE4CalmS3SE4CalmNW44NW9NW8N9NW7NW7
1 day agoNW5W4CalmCalmSW3SE3SE3CalmCalmCalmSE3CalmS3CalmCalmCalmCalmCalmCalmNW6N4NW6NW6NW3
2 days agoS10S8S7S6S5CalmCalmCalmCalmSE3SE3S3CalmCalmCalmCalmNW5NW5NW4NW33CalmN4N4

Tide / Current Tables for Gold Street Bridge, Alviso Slough, San Francisco Bay, California
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Gold Street Bridge
Click for Map
Fri -- 01:14 AM PST     8.38 feet High Tide
Fri -- 07:04 AM PST     3.08 feet Low Tide
Fri -- 07:17 AM PST     Sunrise
Fri -- 07:21 AM PST     Moonrise
Fri -- 11:46 AM PST     10.66 feet High Tide
Fri -- 01:44 PM PST     New Moon
Fri -- 05:20 PM PST     Moonset
Fri -- 05:22 PM PST     Sunset
Fri -- 07:54 PM PST     -0.81 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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7.38.38.17.25.84.53.53.13.75.78.110.110.610.18.86.84.52.30.5-0.5-0.8-01.74

Tide / Current Tables for Dumbarton Point 2.3 mi NE, South San Francisco Bay, California Current
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Dumbarton Point 2.3 mi NE
Click for Map
Fri -- 01:03 AM PST     -0.01 knots Slack
Fri -- 04:47 AM PST     -0.63 knots Max Ebb
Fri -- 06:42 AM PST     0.00 knots Slack
Fri -- 07:17 AM PST     Sunrise
Fri -- 07:21 AM PST     Moonrise
Fri -- 09:14 AM PST     1.09 knots Max Flood
Fri -- 12:02 PM PST     -0.01 knots Slack
Fri -- 01:44 PM PST     New Moon
Fri -- 04:49 PM PST     -1.47 knots Max Ebb
Fri -- 05:20 PM PST     Moonset
Fri -- 05:23 PM PST     Sunset
Fri -- 07:38 PM PST     0.01 knots Slack
Fri -- 10:28 PM PST     1.53 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.80-0.3-0.5-0.6-0.6-0.40.20.81.110.70-0.4-0.9-1.2-1.4-1.5-1.2-0.60.31.11.51.5

Weather Map
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wmap_P
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
Wind Forecast for San Francisco/Monterey Bay Area, CA (21,6,7,8)
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Ground Weather Radar Station San Francisco Bay Area, CA
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The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerous of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.