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

Marine Weather and Tides
Montalvin Manor, 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 7:08PM Monday September 21, 2020 9:19 PM PDT (04:19 UTC) Moonrise 10:57AMMoonset 9:14PM Illumination 24% 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
PZZ530 San Pablo Bay, Suisun Bay, The West Delta And The San Francisco Bay North Of The Bay Bridge- 843 Pm Pdt Mon Sep 21 2020
Tonight..SW winds 5 to 15 kt.
Tue..SW winds 5 to 15 kt with gusts up to 25 kt.
Tue night..SW winds 5 to 10 kt with gusts up to 25 kt.
Wed..SW 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 30 kt.
Thu night..W winds 10 to 20 kt with gusts up to 25 kt.
Fri..W winds 10 to 20 kt with gusts up to 25 kt.
Sat..W winds 10 to 20 kt.
PZZ500 843 Pm Pdt Mon Sep 21 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... 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.


7 Day Forecast for Marine Location Near Montalvin Manor, CA
   Hourly   EDIT   Help
location: 38.06, -122.39     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS66 KMTR 220357 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 857 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 5:34 PM PDT Monday . for 00Z TAFS. VFR across all terminals. Satellite imagery shows stratus has eroded from most areas, except for pockets in southern Monterey Bay and off the coast near Half Moon Bay. WNW winds are providing breezy conditions with a few stronger gusts through coastal gaps. Forecast calls for the marine layer to deepen through tonight, bringing lower clouds further inland overnight. Clouds are expected to scatter out on Tuesday morning by 17z.

Vicinity of KSFO . VFR, with a few clouds around 13k ft lingering around the terminal. Haze was reported earlier in the afternoon from PIREPs and surface obs but it appears to have mostly cleared out. 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 20 kts

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

Monterey Bay Terminals . VFR for the terminals with low clouds lingering over southern and coastal portions of the bay. VFR should prevail into early evening with IFR/LIFR cigs moving in after approximately 04z. Breezy onshore winds continuing through early evening and calming overnight. Clearing expected after 17z on Tuesday with continued onshore flow for the afternoon.

MARINE. as of 08:56 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 Reyes to Pigeon Pt 0-10 nm until 9 PM SCA . Pigeon Pt to Pt Pinos 0-10 nm until 9 PM 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 BEACHES: DK

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
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 7 mi50 min SSW 9.9 G 13 69°F 1011.9 hPa
RCMC1 - 9414863 - Richmond, CA 10 mi50 min SE 9.9 G 13 63°F 65°F1012.7 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 11 mi50 min S 15 G 18 63°F 1013.6 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 12 mi39 min Calm 64°F 1013 hPa
UPBC1 14 mi50 min WSW 8 G 9.9
MZXC1 - 9415102 - Martinez-Amorco CA 14 mi50 min SSW 5.1 G 7 71°F 69°F1012.2 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 17 mi50 min SW 5.1 G 7 63°F 1013.4 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 18 mi50 min E 1.9 G 5.1 62°F 1012.4 hPa
FTPC1 - 9414290 - San Francisco, CA 18 mi50 min SW 8.9 G 13 61°F 62°F1013.5 hPa
OBXC1 18 mi50 min 63°F 62°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 18 mi50 min SW 13 G 14
PXSC1 18 mi50 min 63°F
PCOC1 - 9415144 - Port Chicago, CA 19 mi50 min SSW 6 G 11 67°F 70°F1011.6 hPa
LNDC1 19 mi50 min SW 4.1 G 5.1 63°F 1013.5 hPa
AAMC1 - 9414750 - Alameda, CA 20 mi50 min SSW 5.1 G 6 63°F 69°F1013.7 hPa
SFXC1 - San Francisco Bay Reserve, CA 22 mi95 min W 9.9
46237 - San Francisco Bar, CA (142) 23 mi50 min 59°F4 ft
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 27 mi50 min W 5.1 G 9.9 73°F 1011.5 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 32 mi40 min NW 16 G 19 59°F1014.1 hPa
RTYC1 - 9414523 - Redwood City, CA 39 mi50 min WNW 7 G 8.9 66°F 74°F1014.5 hPa

Wind History for Richmond, CA
(wind in knots)    EDIT      (on/off)   Help
10
PM
11
PM
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
Last
24hr
S6
G9
S7
G10
S7
G10
S6
S9
G13
S8
G12
S2
S4
S7
G11
S5
G8
S7
S7
G10
S8
G11
S6
G9
S9
G12
S7
G10
S6
S6
G10
S7
S5
E3
SE3
G6
SE3
SE9
G16
1 day
ago
S3
SE3
G6
S7
S4
S4
S3
S2
S1
NW3
NE2
E1
SE1
SE2
SE2
SE4
S3
G6
SE3
SE3
SE2
G5
SE3
SE3
SE2
G5
SE3
S3
2 days
ago
W1
S3
--
S1
S2
S4
S6
S6
S4
S5
S4
S4
S4
SE1
G5
SE3
SE1
G4
SE3

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Novato / Gnoss Field, CA11 mi25 minno data10.00 miFair66°F55°F68%1012.5 hPa
Napa, Napa County Airport, CA12 mi26 minS 1010.00 miFair67°F57°F73%1011.5 hPa
Petaluma Municipal Airport, CA18 mi25 minN 010.00 miA Few Clouds63°F55°F77%1012.9 hPa
Concord, Buchanan Field, CA19 mi27 minS 1110.00 miSmoke69°F55°F61%1010.9 hPa

Link to 5 minute data for KDVO

Wind History from DVO (wind in knots)
10
PM
11
PM
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
Last 24hrN6N5CalmCalmCalmN4CalmCalmCalmCalmCalmCalmCalmCalm44SE5E7S9SW12SW8
G19
S7
G12
S7E5
1 day agoN3NW4NW4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmSE45SE5CalmNW7W8
G13
N4N11N3
2 days agoNW6CalmCalmE44N3NE4CalmCalmCalmCalmCalmCalmCalm643N4SE76
G13
SW113CalmCalm

Tide / Current Tables for Pinole Point, San Pablo Bay, California
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Pinole Point
Click for Map
Tue -- 05:52 AM PDT     4.90 feet High Tide
Tue -- 06:57 AM PDT     Sunrise
Tue -- 11:03 AM PDT     2.22 feet Low Tide
Tue -- 01:07 PM PDT     Moonrise
Tue -- 05:13 PM PDT     6.37 feet High Tide
Tue -- 07:05 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
0.2123.144.74.94.63.93.12.52.22.43.145.15.96.46.25.54.22.81.40.4

Tide / Current Tables for Petaluma River Approach #3/#4, San Pablo Bay, California Current
   EDIT      (on/off)   Help   One Week of Data
Petaluma River Approach #3/#4
Click for Map
Tue -- 12:12 AM PDT     0.00 knots Slack
Tue -- 02:34 AM PDT     0.51 knots Max Flood
Tue -- 06:35 AM PDT     -0.00 knots Slack
Tue -- 06:57 AM PDT     Sunrise
Tue -- 09:00 AM PDT     -0.48 knots Max Ebb
Tue -- 11:26 AM PDT     0.00 knots Slack
Tue -- 01:07 PM PDT     Moonrise
Tue -- 01:46 PM PDT     0.72 knots Max Flood
Tue -- 06:01 PM PDT     -0.00 knots Slack
Tue -- 07:05 PM PDT     Sunset
Tue -- 09:32 PM PDT     -0.81 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
-0.10.30.50.50.40.30.1-0.1-0.4-0.5-0.4-0.20.30.60.70.60.50.30-0.4-0.7-0.8-0.8-0.7

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 Sacramento, 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.