Tuesday, July14, 2020
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Marine Weather and Tides
South San Francisco, 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 5:58AMSunset 8:32PM Tuesday July 14, 2020 8:59 AM PDT (15:59 UTC) Moonrise 12:33AMMoonset 2:07PM Illumination 32% Phase: Waning Crescent; Moon at 24 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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PZZ530 San Pablo Bay, Suisun Bay, The West Delta And The San Francisco Bay North Of The Bay Bridge- 240 Am Pdt Tue Jul 14 2020
.small craft advisory in effect from 11 am pdt this morning through this evening...
Today..SW winds 15 to 25 kt with gusts up to 30 kt.
Tonight..SW winds 10 to 20 kt with gusts up to 30 kt.
Wed..SW winds 10 to 20 kt with gusts up to 30 kt.
Wed night..SW winds 10 to 20 kt with gusts up to 25 kt.
Thu..SW winds 10 to 20 kt with gusts up to 25 kt.
Thu night..SW winds 10 to 20 kt with gusts up to 25 kt.
Fri..SW winds 5 to 15 kt.
Sat..SW winds 5 to 15 kt.
PZZ500 240 Am Pdt Tue Jul 14 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... A weak low pressure circulation off the san mateo coast is bringing a light southerly flow to the inner waters and stronger northwest winds to the outer waters. Winds will increase over the northern san francisco bay during the afternoon and evening hours. This pattern is expected to continue through Thursday.


7 Day Forecast for Marine Location Near South San Francisco, CA
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location: 37.65, -122.36     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 141145 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 445 AM PDT Tue Jul 14 2020

SYNOPSIS. A few additional degrees of inland cooling is expected on Tuesday as onshore flow increases. Temperatures will then likely remain near seasonal averages for the remainder of the week and into the upcoming weekend along with the ebb and flow of overnight and morning low clouds.

DISCUSSION. as of 03:24 AM PDT Tuesday . As high pressure over the Desert Southwest continues to weaken, onshore flow continues to push marine air well inland with current temperatures across the interior a few to as much as 10 deg F cooler compared to this time yesterday. Additionally, widespread stratus has penetrated inland in response to a the marine layer now more than 2,000 feet in depth per the Fort Ord Profiler. Meanwhile, locations such as the Sonoma Valley, much of the South Bay and interior East Bay Valleys remain clear at this time.

Surface winds along the coast are forecast to turn southerly throughout the day which should result in a cooling trend in locations such as Santa Rosa, Santa Cruz and Big Sur. Meanwhile interior locations will see temperatures today to be similar to or slightly cooler compared to yesterday. Similar conditions are likely to persist into Wednesday with temperatures near to slightly below seasonal averages along with the ebb and flow of coastal stratus into the valleys during the overnight/morning hours.

Another upper level trough is forecast to develop near the West Coast by late week resulting in only minor day to day fluctuations in temperatures, especially near the coast. Meanwhile, some slight warming will be possible across the interior as onshore flow weakens slightly. While the forecast models indicate a slight increase in mid/upper level monsoon moisture advecting across the Sierra by Thursday, it appears the deepest moisture and most instability will remain to the east of the Bay Area. Thus, cannot rule out a few higher level clouds drifting westward across the region late in the week. Overall, weather conditions through the upcoming weekend will be typical of mid/late July.

AVIATION. as of 4:45 AM PDT Tuesday . Marine layer has deepened to over 2000 ft. Stratus moved into the East Bay early last night but a weak circulation off the San Mateo coast has produced a southerly flow that is keeping stratus out of SFO. Southerly winds are stronger than normal at SJC this morning. Conditions are expected to remain VFR at SFO but some stratus from the East Bay may move over the parts of the approach. Clouds in the Bay Area clearing after 17Z.

Vicinity of KSFO . VFR with cigs at OAK and parts of the approach. Southwest winds 5-10 kt this morning becoming west to northwest 10-15 kt after 20Z.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . Cigs at or just below 1000 ft this morning. A deep marine layer may keep clouds in for most of the day at MRY. Clearing after 20-21Z at SNS returning early in the evening.

MARINE. as of 04:32 AM PDT Tuesday . A weak low pressure circulation off the San Mateo coast is bringing a light southerly flow to the inner waters and stronger northwest winds to the outer waters. Winds will increase over the northern San Francisco Bay during the afternoon and evening hours. This pattern is expected to continue through Thursday.

MTR WATCHES/WARNINGS/ADVISORIES. Tday. SCA . Pt Arena to Pigeon Pt 10-60 nm SCA . Pt Arena to Pt Reyes 0-10 nm until 6 AM SCA . SF Bay from 11 AM



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

Visit us at www.weather.gov/sanfrancisco

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
AAMC1 - 9414750 - Alameda, CA 9 mi65 min 69°F
FTPC1 - 9414290 - San Francisco, CA 12 mi65 min 61°F
RTYC1 - 9414523 - Redwood City, CA 13 mi65 min 74°F
46237 - San Francisco Bar, CA (142) 17 mi59 min 56°F4 ft
TIBC1 - Tiburon Pier, San Francisco Bay, CA 17 mi61 min S 9.9 56°F 1013 hPa
RCMC1 - 9414863 - Richmond, CA 19 mi65 min 64°F
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 26 mi39 min S 9.7 G 12 51°F 54°F1013.6 hPa51°F
MZXC1 - 9415102 - Martinez-Amorco CA 29 mi65 min 70°F
PCOC1 - 9415144 - Port Chicago, CA 33 mi65 min 71°F
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 34 mi39 min WNW 5.8 G 9.7 54°F 1014.7 hPa52°F
SFXC1 - San Francisco Bay Reserve, CA 42 mi74 min WNW 11

Wind History for Alameda, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Francisco, San Francisco International Airport, CA2 mi2.1 hrsS 710.00 miA Few Clouds57°F50°F78%1012.6 hPa
Oakland, Metro Oakland International Airport, CA8 mi66 minSSW 1310.00 miMostly Cloudy61°F53°F75%1013.2 hPa
San Carlos Airport, CA10 mi2 hrsENE 49.00 miFair57°F53°F88%1013.2 hPa
Half Moon Bay Airport, CA12 mi79 minS 84.00 miFog/Mist55°F51°F88%1014.2 hPa
Hayward, Hayward Air Terminal, CA13 mi2.1 hrsSSE 810.00 miOvercast60°F51°F72%1013.6 hPa
Mountain View, Moffett Field, CA22 mi2.1 hrsVar 310.00 miA Few Clouds59°F51°F77%1012.9 hPa

Link to 5 minute data for KSFO

Wind History from SFO (wind in knots)
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Last 24hrNW9NW15NW16NW14NW17W11W13W16W16
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W15W17W10W10CalmW8W6NW3NW4CalmNW5S7S5S7Calm
1 day agoNW6NW9N9NW10NW11NW17NW20NW20NW20
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2 days agoNW7NW11NW10NW14NW15NW16NW18NW21NW20NW18NW15
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Tide / Current Tables for Oyster Point Marina, San Francisco Bay, California
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Oyster Point Marina
Click for Map
Tue -- 01:33 AM PDT     Moonrise
Tue -- 02:43 AM PDT     1.63 feet Low Tide
Tue -- 05:59 AM PDT     Sunrise
Tue -- 08:45 AM PDT     4.55 feet High Tide
Tue -- 01:50 PM PDT     2.29 feet Low Tide
Tue -- 03:07 PM PDT     Moonset
Tue -- 08:22 PM PDT     6.73 feet High Tide
Tue -- 08:30 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.12.31.71.722.63.344.44.54.23.62.92.42.32.63.34.45.46.36.76.665

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
Tue -- 01:32 AM PDT     Moonrise
Tue -- 03:22 AM PDT     0.00 knots Slack
Tue -- 05:59 AM PDT     Sunrise
Tue -- 06:18 AM PDT     0.54 knots Max Flood
Tue -- 09:14 AM PDT     -0.00 knots Slack
Tue -- 11:54 AM PDT     -0.65 knots Max Ebb
Tue -- 02:53 PM PDT     0.00 knots Slack
Tue -- 03:07 PM PDT     Moonset
Tue -- 05:56 PM PDT     0.59 knots Max Flood
Tue -- 08:30 PM PDT     Sunset
Tue -- 08:59 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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-1.1-0.9-0.6-0.20.20.40.50.50.40.1-0.3-0.6-0.6-0.5-0.300.30.50.60.50.3-0-0.5-1

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 (11,2,3,4)
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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.