Tuesday, September22, 2020
Privacy Policy
L-36.com

Marine Weather and Tides
Sunol, CA

Version 3.4
NOTICE
8/26/2020 The 7 day forecast is taking about 5 seconds to load but it will eventually load. NOAA is still working on it.
8/18/2020 NOAA continues to have trouble. Wind guest will occasionally be left off graphs. I am working with NOAA to resolve the issue.
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 6:55AMSunset 7:05PM Tuesday September 22, 2020 2:58 AM PDT (09:58 UTC) Moonrise 12:04PMMoonset 9:59PM Illumination 26% Phase: Waxing Crescent; Moon at 5 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
    EDIT      (on/off)   Help
PZZ531 San Francisco Bay South Of The Bay Bridge- 236 Am Pdt Tue Sep 22 2020
Today..W winds up to 10 kt, increasing to 10 to 20 kt with gusts up to 25 kt this afternoon.
Tonight..W winds 10 to 20 kt with gusts up to 25 kt.
Wed..W winds 5 to 15 kt with gusts up to 25 kt.
Wed night..W winds 5 to 15 kt.
Thu..W winds 10 to 20 kt with gusts up to 25 kt.
Thu night..W winds 5 to 15 kt.
Fri..W winds 10 to 20 kt with gusts up to 25 kt.
Sat..W winds 5 to 15 kt.
PZZ500 236 Am Pdt Tue Sep 22 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... A 1020 mb high is centered 900 miles west of pt pinos. A 979 mb low is in the gulf of alaska. This low will generate a large northwest swell that will arrive Thursday and Friday. Northwest winds will be light to moderate with the strongest winds along the inner coastal waters.


7 Day Forecast for Marine Location Near Sunol, CA
   Hourly   EDIT   Help
location: 37.58, -121.92     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS66 KMTR 220543 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 1043 PM PDT Mon Sep 21 2020

SYNOPSIS. A seasonable weather pattern through midweek with temperatures running near normal. A dry cold front passes through the Bay Area on Thursday that will keep persistent onshore winds in place into Friday. Dramatic change in store for the weekend as high pressure quickly builds with increasing offshore wind pattern. Temperatures rapidly warming over the weekend with periods of offshore winds that will increase fire weather concerns as hot afternoons, low humidity and breezy offshore winds coincide. Strong ridge to stay in place at least through early next week.

DISCUSSION. as of 08:56 PM PDT Monday . Regional profilers continue to indicate a marine layer between 800-1,200 feet in depth this evening with stratus developing along the San Mateo Coastline to around portions of the Monterey Bay Region. Aloft, a short-wave trough pushing into northern California has allowed for mid/high level clouds to advect inland over the region. This may keep the boundary layer mixed a bit, yet still do expect low clouds to become a bit more widespread into Tuesday morning. With slight cooling aloft, look for temperatures to remain near to slightly below seasonal averages through the first half of the week with day-to-day fluctuations in the marine layer and associated coastal clouds. This said, the ongoing forecast remains on track with no updated anticipated at this time. For additional details, please see the previous forecast discussion below.

PREV DISCUSSION. as of 2:19 PM PDT Monday . Todays focus has actually been on the long range forecast and its potential impacts this weekend with less focus on the short term.

Short term: Marine layer locally just over 1200 feet with low clouds confined to the Monterey peninsula this afternoon while all other locations remain sunny. 24 hour temp trends show significant cooling compared to Sunday afternoon with most places running 4-8 degrees cooler while Watsonville and Salinas are running close to 20 degrees cooler. Weather pattern tonight through Weds will be zonal/onshore with some shortwave ridging by Weds. This should translate to seasonable temps with 70s/80s inland.

By Thursday a cold front will move into Northern California. Any rain looks to stay from Mendocino northward with perhaps some coastal drizzle, especially for the Sonoma coast on Thursday. Behind the front persistent onshore winds and lowering heights on Friday will keep temps running near to slightly below normal.

All attention then turns to the weekend forecast. Confidence increasing for potentially significant offshore wind event. Temps will warm rapidly on Saturday with highs bouncing well back into the 80s and lower 90s as a 594dm high builds off the coast with some offshore winds near the surface. Ensemble solutions remain consistent with building ridge leading to hotter temps and stronger offshore winds into Sunday. Would expect widespread highs into the 90s and even some lower 100s. The dry airmass will allow for decent night time cooling that should preclude widespread significant heat impacts though even the overnight lows will remain warmer than normal where the offshore winds blow all night.

Right now the peak of the winds looks to be Sunday morning for the North and East Bay hills but still several days out to dial in the details and exact timing. Confidence is high overall and Sunday does look to be hotter than Saturday as heights builds to at least 596dm with persistent offshore/drying winds. Interestingly enough the pattern looks to take hold for several days with the ridge anchored along the West Coast at least through Weds of next week. Right now the only hope of cooling looks to be a southerly wind reversal along the coast.

AVIATION. As of 10:43 PM PDT Monday . for 06Z TAFs. Satellite imagery shows coastal stratus returning and mid to high level clouds moving eastward with a weak 500 mb trough. Marine layer stratus will move inland further overnight. Clouds are expected to scatter out on Tuesday morning by 17z.

Vicinity of KSFO . VFR. The marine layer is expected to deepen overnight allowing the stratus to move back into the Bay Area for MVFR cigs overnight, possibly lowering to IFR. Clearing after 17z. Winds will increase Monday afternoon with strongest winds up to 25 kts

SFO Bridge Approach . Possible lowered slant-range vis from haze, otherwise similar to KSFO.

Monterey Bay Terminals . VFR except IFR/LIFR vicinity KWVI with stratus cigs developing elsewhere around the Monterey Bay and the northern Salinas Valley overnight. Light onshore winds through the evening and overnight. Clearing expected after 17z on Tuesday with continued onshore flow for the afternoon.

MARINE. as of 8:56 PM PDT Monday . Gusty northwest winds over the northern and inner coastal waters tonight and Tuesday, winds easing Tuesday night into Wednesday morning. Mixed seas will persist with a shorter period northwest swell and a long period southwest swell. A more robust northwest swell will arrive across the waters by Friday morning.

BEACHES. as of 02:34 PM PDT Monday . A larger northwest swell arrives late Thursday evening and into Friday morning. The main impacts will be increased wave heights breaking near the shoreline and an increased risk of rip currents developing along coastal beaches. With the increase in temperatures inland expected this weekend, beachgoers should be mindful of the increased wave activity and rip currents. The wave activity is forecast to gradually decrease through the weekend, but caution is advised through at least Sunday morning.

MTR WATCHES/WARNINGS/ADVISORIES. Tngt. SCA . Pt Arena to Pigeon Pt 10-60 nm SCA . Pt Arena to Pt Reyes 0-10 nm SCA . Pt Pinos to Pt Piedras Blancas 0-10 nm until 3 AM



PUBLIC FORECAST: RGass/RWW AVIATION: Lorber/Canepa MARINE: Canepa

Visit us at www.weather.gov/sanfrancisco

Follow us on Facebook, Twitter, and YouTube at: www.facebook.com/nwsbayarea www.twitter.com/nwsbayarea www.youtube.com/nwsbayarea


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 16 mi65 min WSW 2.9 G 5.1 63°F 73°F1015.8 hPa
LNDC1 24 mi65 min SSE 6 G 8 62°F 1014.8 hPa
AAMC1 - 9414750 - Alameda, CA 24 mi65 min S 6 G 8 61°F 69°F1015 hPa
OBXC1 27 mi65 min 61°F 61°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 27 mi65 min S 5.1 G 8 61°F 1014.8 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 27 mi65 min SSE 2.9 G 5.1
PXOC1 - 9414311 - San Francisco (Pier 1), CA 29 mi65 min Calm G 2.9 60°F 1013.6 hPa
PXSC1 30 mi65 min 62°F
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 32 mi65 min NNE 1.9 G 5.1 68°F 1013.1 hPa
UPBC1 33 mi65 min SSW 1.9 G 4.1
PCOC1 - 9415144 - Port Chicago, CA 33 mi65 min SSW 7 G 13 62°F 69°F1013.4 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 33 mi65 min SSE 9.9 G 13 62°F 1014.9 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 33 mi65 min SSE 2.9 G 4.1 65°F 69°F1013.9 hPa
FTPC1 - 9414290 - San Francisco, CA 33 mi65 min SW 4.1 G 8 60°F 65°F1014.7 hPa
RCMC1 - 9414863 - Richmond, CA 35 mi65 min SSE 7 G 9.9 62°F 65°F1014.2 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 35 mi54 min Calm 60°F 1015 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 38 mi65 min SW 8.9 G 12 63°F 1013.7 hPa
46237 - San Francisco Bar, CA (142) 40 mi59 min 60°F4 ft
SFXC1 - San Francisco Bay Reserve, CA 43 mi74 min W 12

Wind History for Redwood City, CA
(wind in knots)    EDIT      (on/off)   Help
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
Last
24hr
NW4
NW4
NW3
SE1
SW1
S2
E1
N3
NW2
N4
N11
G14
N13
W12
G16
W12
G16
W15
W15
W11
G14
W8
W7
G10
W6
NW5
W3
W6
G9
W4
1 day
ago
NW3
SW2
W1
S1
S1
--
S3
E3
E2
N3
N5
N8
NW10
NW11
NW8
NW7
N8
N10
W5
W3
N2
NW3
NW3
NW3
2 days
ago
--
S5
S3
S3
S3
NW6
N3
N5
NW4
G8
NW4
G7
N9
NW10
NW9
W10
W7
G10
W3
N4
N2
NW1
SE2
S1
--

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Livermore, Livermore Municipal Airport, CA10 mi66 minWNW 310.00 miFair60°F55°F86%1014.2 hPa
Hayward, Hayward Air Terminal, CA12 mi65 minW 610.00 miOvercast64°F55°F75%1016 hPa
Mountain View, Moffett Field, CA12 mi69 minNE 410.00 miPartly Cloudy63°F57°F83%1015.2 hPa
San Jose, San Jose International Airport, CA15 mi66 minNNW 310.00 miFair62°F55°F78%1015.1 hPa
Oakland, Metro Oakland International Airport, CA18 mi66 minW 710.00 miOvercast64°F57°F78%1015 hPa
San Carlos Airport, CA18 mi64 minW 710.00 miFair63°F57°F83%1015.6 hPa
San Francisco, San Francisco International Airport, CA23 mi63 minW 1210.00 miMostly Cloudy62°F57°F84%1014.9 hPa

Link to 5 minute data for KLVK

Wind History from LVK (wind in knots)
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
Last 24hrCalmCalmE3CalmCalmCalmCalmCalmSW3NW5W8W10W12NW10W10W13W9W7NW5NW9NW6CalmW4NW3
1 day agoCalmE3CalmCalmCalmCalmE3CalmCalmE6NE5Calm5SW5W9W12W9W7W3CalmNE3CalmCalmCalm
2 days agoSW3CalmSW5CalmSW3S34W53S6463E7W8W11W9W6CalmCalmCalmE3CalmCalm

Tide / Current Tables for Coyote Creek, Tributary #1, San Francisco Bay, California
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Coyote Creek
Click for Map
Tue -- 12:27 AM PDT     -0.31 feet Low Tide
Tue -- 06:00 AM PDT     7.31 feet High Tide
Tue -- 06:56 AM PDT     Sunrise
Tue -- 12:22 PM PDT     2.11 feet Low Tide
Tue -- 01:04 PM PDT     Moonrise
Tue -- 05:22 PM PDT     8.73 feet High Tide
Tue -- 07:03 PM PDT     Sunset
Tue -- 10:59 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
-0.2-0.11.23.15.16.77.376.14.93.62.72.12.43.65.57.48.68.67.96.753.21.6

Tide / Current Tables for Dumbarton Point 2.3 mi NE, South San Francisco Bay, California Current
   EDIT      (on/off)   Help   One Week of Data
Dumbarton Point 2.3 mi NE
Click for Map
Tue -- 02:35 AM PDT     1.45 knots Max Flood
Tue -- 06:02 AM PDT     -0.00 knots Slack
Tue -- 06:56 AM PDT     Sunrise
Tue -- 09:48 AM PDT     -0.77 knots Max Ebb
Tue -- 11:53 AM PDT     0.00 knots Slack
Tue -- 01:04 PM PDT     Moonrise
Tue -- 02:28 PM PDT     1.03 knots Max Flood
Tue -- 05:21 PM PDT     -0.00 knots Slack
Tue -- 07:04 PM PDT     Sunset
Tue -- 10:07 PM PDT     -1.35 knots Max Ebb
Tue -- 10:59 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
0.10.91.41.41.20.70-0.3-0.6-0.7-0.8-0.40.10.6110.70.2-0.2-0.6-1-1.2-1.4-1.1

Weather Map
       (on/off)   Help Weather Map
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
Ground Weather Radar Station San Francisco Bay Area, CA
   (on/off)   Help
weather_mapweather_map weather_map


Cookie Policy:
This website uses cookies to save your settings. No personal information is saved. I do not collect statistics on your visit. You can disable cookies in your browser if you like but it is not recommended for this site. I do not sell cookies. Go to a bakery for that. In fact I do not sell anything. To disable cookies from L-36.com, please refer to the Help button in your browser.
Privacy Policy:
I do not sell or share any user data or anything else for that matter. The only personal information I save is in the site log which has a line for each page view which includes the IP address your browser sends in the header as well as which page you requested. I use this to block hackers and other bad actors. I do not use this raw data to create profiles on users. I periodically delete the log files. Google supplies the ads on this site. Because I do not track who you are, I cannot customize how these ads are served. They may be personalized to improve the ad experience. If you do not want personalized ads, please adjust the settings on the Google site HERE.
. NOTE: The best I can determine, this site is not subject to CCPA but I am doing my best to comply anyway. Disclaimer:
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.