Saturday, August8, 2020
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Marine Weather and Tides
Millbrae, 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 6:17AMSunset 8:12PM Friday August 7, 2020 10:27 PM PDT (05:27 UTC) Moonrise 9:44PMMoonset 9:06AM Illumination 82% Phase: Waning Gibbous; Moon at 19 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- 831 Pm Pdt Fri Aug 7 2020
Tonight..NW winds 5 to 15 kt.
Sat..NW winds 5 to 15 kt.
Sat night..NW winds 5 to 15 kt.
Sun..NW winds 5 to 15 kt.
Sun night..NW winds 5 to 15 kt.
Mon..NW winds 5 to 15 kt.
Mon night..SW winds 5 to 10 kt.
Tue..SW winds 10 to 20 kt.
Wed..SW winds 10 to 20 kt.
PZZ500 831 Pm Pdt Fri Aug 7 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Breezy north-northwest winds over the northern outer waters with lighter south-southwesterly breezes near the coast. Winds are forecast to ease gradually through the weekend. Locally hazardous conditions for small craft primarily in the region of stronger winds and the potential for squared seas in the northern outer waters.


7 Day Forecast for Marine Location Near Millbrae, CA
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location: 37.58, -122.39     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 080335 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 835 PM PDT Fri Aug 7 2020

SYNOPSIS. Warmer temperatures are expected over the weekend, especially inland. Slightly cooler weather returns early next week.

DISCUSSION. As of 8:35 PM PDT Friday . Current synoptic pattern consists of an upper ridge to our west over the Eastern Pacific and a second upper ridge centered well to our east over Texas. In between, a weak upper trough is located over California. As we move through the weekend, the upper ridge over Texas is forecast to strengthen and expand westward. At the same time, the weak upper trough over California is forecast to form a cutoff low that will drift offshore the south-central coast. These developments will result in a gradual increase in heights and temperatures aloft through Sunday, and also a likely reduction in the depth of the marine layer. Thus, we can expect a warming trend inland through Sunday. Inland temps are forecast to warm a few degrees tomorrow and another couple of degrees on Sunday. 90s will be common in the interior valleys by Sunday when most inland areas are expected to be about five degrees above normal. Meanwhile, light onshore flow and a persistent marine layer near the coast will keep coastal temperatures during the weekend close to what they were today. Also, light southerly surface flow is forecast near the coast which will likely result in persistent low clouds at the ocean beaches for much of the weekend.

High level moisture over northern and eastern California resulted in scattered afternoon and evening thunderstorms over the northern Sierra today. Models indicate that this high level moisture will drift towards the west by late in the weekend in response to the flow around the weak upper low offshore. But even if this moisture travels far enough west to reach our North and/or East Bay counties, there likely won't be a trigger to generate high- based convection, such as the elevated heat source of higher mountains like the Sierra.

A low amplitude upper trough is forecast to settle into the Pacific Northwest during the first half of next week, which will likely result in a modest cooling trend on Monday and Tuesday, with inland high temperatures forecast to return to near normal. Otherwise, weather impacts over the next seven days will be minimal as a relatively benign weather pattern persists.

AVIATION. As of 04:37 PM PDT Friday . for 00z TAFs. VFR featuring a compressed marine layer at around 1000 ft AGL on the Fort Ord and Bodega Bay profilers. MVFR/IFR conditions expected as the stratus returns overnight. Winds are onshore and breezy, but will taper off overnight. With such a shallow marine layer, look for stratus to mix out around 16-17z Saturday morning. VFR forecast Saturday afternoon with traditional afternoon breezy conditions

Vicinity of KSFO . VFR with breezy onshore winds. As stratus returns this evening, cigs should develop around the 1000 foot mark straddling the terminal between MVFR/IFR conditions. Winds are forecast to ease overnight. VFR forecast after 17z as onshore winds increase.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . VFR as clouds are scattered over the Bay looking to move in. Cloud cover will increase for IFR cigs overnight with a chance of reduced vis after 11z. Clouds will break up and scatter after 17z for VFR Saturday afternoon. Winds are currently breezy and onshore. Winds will calm overnight before once again becoming breezy Saturday afternoon

MARINE. As of 8:31 PM PDT Friday . Breezy north-northwest winds over the northern outer waters with lighter south-southwesterly breezes near the coast. Winds are forecast to ease gradually through the weekend. Locally hazardous conditions for small craft primarily in the region of stronger winds and the potential for squared seas in the northern outer waters.

MTR WATCHES/WARNINGS/ADVISORIES. Tngt. SCA . Pt Arena to Pigeon Pt 10-60 nm



PUBLIC FORECAST: Dykema AVIATION: DK MARINE: DK

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 11 mi57 min NNW 6 G 8.9 65°F 73°F1014.3 hPa
AAMC1 - 9414750 - Alameda, CA 14 mi57 min NNW 2.9 G 5.1 61°F 70°F1014 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 15 mi57 min W 7 G 12 58°F 1012.9 hPa
PXSC1 15 mi57 min 59°F 59°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 16 mi57 min W 8.9 G 9.9
FTPC1 - 9414290 - San Francisco, CA 16 mi57 min WSW 1.9 G 11 56°F 63°F1014.2 hPa
LNDC1 16 mi57 min N 4.1 G 6 61°F 1013.8 hPa
OBXC1 16 mi57 min 59°F 59°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 16 mi57 min W 6 G 8 59°F 1013.9 hPa
46237 - San Francisco Bar, CA (142) 19 mi57 min 60°F5 ft
PPXC1 - 9414847 - Richmond (Point Potrero), CA 23 mi57 min SSW 5.1 G 8 62°F 1014 hPa
RCMC1 - 9414863 - Richmond, CA 24 mi57 min NNW 2.9 G 5.1 62°F 65°F1013.3 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 27 mi37 min W 1.9 G 3.9 53°F 55°F6 ft1014.9 hPa53°F
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 30 mi37 min N 1.9 G 5.8 54°F 6 ft1015.2 hPa53°F
MZXC1 - 9415102 - Martinez-Amorco CA 34 mi57 min WSW 9.9 G 11 70°F 70°F1012.5 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 34 mi57 min WSW 6 G 9.9 67°F 1012.7 hPa
UPBC1 35 mi57 min W 8.9 G 12
PCOC1 - 9415144 - Port Chicago, CA 38 mi57 min SW 7 G 8 69°F 71°F1012.1 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 41 mi57 min WNW 9.9 G 14 75°F 1011.5 hPa
SFXC1 - San Francisco Bay Reserve, CA 47 mi102 min WNW 5.1

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Francisco, San Francisco International Airport, CA3 mi31 minWNW 1010.00 miA Few Clouds61°F54°F78%1013.7 hPa
San Carlos Airport, CA8 mi32 minN 010.00 miFair64°F55°F73%1014.2 hPa
Half Moon Bay Airport, CA8 mi32 minS 85.00 miFog/Mist57°F55°F94%1014.9 hPa
Oakland, Metro Oakland International Airport, CA12 mi34 minNW 410.00 miA Few Clouds63°F55°F78%1013.9 hPa
Hayward, Hayward Air Terminal, CA15 mi33 minWNW 410.00 miFair65°F54°F68%1014.4 hPa

Link to 5 minute data for KSFO

Wind History from SFO (wind in knots)
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Last 24hrW8SW10SW7CalmN3CalmS4S4NW7CalmSE4N4NE7NE6NE7N8NE7NW9NW13NW13NW16NW14NW14NW10
1 day agoW16
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SW10W9W7SW8W9SW7CalmSW5N5NE6NE6NE7NW15NW13W19W16W15
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Tide / Current Tables for Coyote Point Marina, San Francisco Bay, California (3)
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Coyote Point Marina
Click for Map
Sat -- 03:34 AM PDT     6.39 feet High Tide
Sat -- 06:19 AM PDT     Sunrise
Sat -- 10:17 AM PDT     0.89 feet Low Tide
Sat -- 11:02 AM PDT     Moonset
Sat -- 04:44 PM PDT     6.69 feet High Tide
Sat -- 08:09 PM PDT     Sunset
Sat -- 11:02 PM PDT     2.23 feet Low Tide
Sat -- 11:08 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.44.55.66.36.35.84.93.62.31.40.91.11.93.14.55.76.56.76.25.34.23.22.52.2

Tide / Current Tables for Oyster Point 2.8 mi E, South San Francisco Bay, California Current
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Oyster Point 2.8 mi E
Click for Map
Sat -- 01:19 AM PDT     0.71 knots Max Flood
Sat -- 04:17 AM PDT     -0.00 knots Slack
Sat -- 06:19 AM PDT     Sunrise
Sat -- 07:44 AM PDT     -1.40 knots Max Ebb
Sat -- 10:48 AM PDT     0.01 knots Slack
Sat -- 11:02 AM PDT     Moonset
Sat -- 01:50 PM PDT     0.85 knots Max Flood
Sat -- 05:09 PM PDT     -0.01 knots Slack
Sat -- 08:09 PM PDT     Sunset
Sat -- 08:15 PM PDT     -1.16 knots Max Ebb
Sat -- 11:08 PM PDT     Moonrise
Sat -- 11:20 PM PDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.50.70.70.50.1-0.4-0.9-1.3-1.4-1-0.50.10.50.80.80.70.50.1-0.5-0.9-1.1-1-0.6-0.2

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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for San Francisco/Monterey Bay Area, CA (1,6,7,8)
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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.