Tuesday, May26, 2020
Privacy Policy
L-36.com


Marine Weather and Tides
Black Point-Green Point, 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 5:49AMSunset 8:25PM Tuesday May 26, 2020 10:13 AM PDT (17:13 UTC) Moonrise 8:08AMMoonset 11:18PM Illumination 21% Phase: Waxing Crescent; Moon at 4 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- 800 Am Pdt Tue May 26 2020
Tonight..SW winds 5 to 15 kt.
Wed..SW winds 5 to 15 kt with gusts up to 25 kt.
Wed night..SW winds 5 to 15 kt.
Thu..SW winds 10 to 20 kt with gusts up to 25 kt.
Thu night..SW winds 5 to 15 kt.
Fri..SW winds 5 to 15 kt.
Fri night..SW winds 10 to 15 kt. A chance of showers.
Sat..SW winds 5 to 15 kt. A chance of showers.
Sun..SW winds up to 10 kt. A chance of showers.
PZZ500 800 Am Pdt Tue May 26 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Generally light to moderate northwest winds will persist across the coastal waters as an upper ridge sits over california and an upper low slowly approaches from the southwest. Gusty northwest winds are expected through tomorrow across the northern waters. These winds will generate steep fresh swell resulting in hazardous seas conditions for small crafts. Mixed seas will continue with a short period northwest swell and a longer period southwest swell. A longer period northwest swell will arrive later this week.


7 Day Forecast for Marine Location Near Black Point-Green Point, CA
   Hourly   EDIT   Help
location: 38.11, -122.5     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS66 KMTR 261542 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 842 AM PDT Tue May 26 2020

SYNOPSIS. Very warm to hot temperatures will persist across the interior through Thursday while coastal areas will be relatively mild by comparison. A Heat Advisory remains in effect across the interior. Cooling will first take place at the coast on Wednesday before spreading inland Thursday and moreso into Friday as onshore flow increases. There is a chance of showers late Friday night into Saturday.

DISCUSSION. as of 08:40 AM PDT Tuesday . Clear sky conditions prevail this morning with temperatures in the 50s at the coast to 80s in the hills/ridges. This of course is indicative of the very warm air mass aloft with 850mb temperature from the 12Z OAK Upper Air Sounding at 21.75 deg C. Thus, look for inland temperatures to be at or a few degrees warmer compared to yesterday. Coastal locations are forecast to be similar to yesterday, yet some locations will be +/- 5 deg F depending on timing and strength of onshore flow this afternoon. Regardless, the inland heat and limited overnight cooling supports the ongoing Heat Advisory across the interior. For complete forecast details, please see the previous forecast discussion below.

PREV DISCUSSION. As of 3:00 AM PDT Tuesday . Conditions early this morning are similar to those of 24 hours ago. Skies are clear across our entire region as an upper ridge remains anchored over California. A robust surface pressure gradient of nearly 7 mb from ACV to SFO continues to limit onshore flow, while a weak onshore gradient from the coast to the Central Valley is preventing surface flow from turning offshore. Higher surface dewpoints early this morning are helping to hold temps at least a few degrees above what they were at this time yesterday morning and so most places will start the day with warmer temps compared to yesterday. This warmer start, plus continued warming of the airmass aloft, will result in at least a few additional degrees of warming across inland areas, which already experience hot, and in some cases record-breaking, temperatures on Monday. A Heat Advisory remains in effect for all inland areas. Because there has been little change in surface pressure gradients from yesterday, and because the latest local WRF is forecasting persistent light onshore surface flow today, coastal temperatures are expected to remain mild compared to inland areas. But even at the coast, temperatures today will be well above normal. For instance, Downtown San Francisco will likely warm to around 80 this afternoon, just like yesterday.

Not much change is anticipated inland on Wednesday as the upper ridge holds firm. But an uptick in onshore flow will likely result in at least modest cooling in coastal areas. The Heat Advisory will remain in effect for inland areas through at least Wednesday evening as Heat Risk remains in the moderate to high category in most locations away from the coast.

Models agree that the upper ridge will begin to shift to the east by Thursday. This will result in a further increase in onshore flow, enough to bring at least slight relief to most inland areas. We may also see a shallow marine layer redevelop near the coast by Wednesday night or Thursday morning which will result in continued cooling at the coast. The difficult part of the forecast is determining if there will be enough inland cooling by Thursday to justify a modification to the end time of the Heat Advisory. Currently, the Heat Advisory for inland areas is in effect until 7 pm Thursday. Our current forecast calls for about 3-5 degrees of inland cooling on Thursday, but this may not be enough cooling to significantly reduce Heat Risk for interior areas, especially considering the cumulative impact of four consecutive days of very warm to hot temperatures. So, will keep the Heat Advisory going through Thursday for the time being, but the ending time may be moved back to Wednesday evening if the models trend any cooler for Thursday.

Inland temperatures are forecast to cool by as much as 10 degrees on Friday as southerly flow ahead of an approaching upper low helps transport cooler marine air inland. The ECMWF is trending wetter with the upper low, with the 00Z run forecasting shower activity across much of our area late Friday night and Saturday as the low approaches Cape Mendocino. The GFS is drier by comparison, but the model blend has picked up on the wetter ECMWF solution, resulting in more widespread shower chances in our area on Saturday. A more pressing forecast concern for Saturday is whether there will also be isolated thunderstorms in our area. The NBM forecasts thunderstorm chances just below the slight chance category in the North Bay on Saturday and the models tend to focus the most unstable airmass to our north. In any case, it will be important to monitor Saturday's system closely for thunderstorm potential since rainfall with the thunderstorms will likely be light and dry lightning may occur.

Longer range models indicate continued unsettled weather into early next week as an upper trough persists near the West Coast.

AVIATION. as of 4:35 AM PDT Tuesday . For 12z TAFs. VFR.

Vicinity of KSFO . VFR, west wind increasing to 15 to 25 knots early afternoon to evening.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . VFR, light winds becoming west near 10 knots in the afternoon and evening.

CLIMATE.

Record highs May 26 May 27 ----------------------------------------------------------------- Santa Rosa 96/1974 94/1984 Kentfield 99/1951 99/1919 Napa 98/1896 102/1984 Richmond 87/1996 98/1984 San Francisco DT 91/1896 85/1933 SFO Airport 89/1974 97/1984 Redwood City 98/1974 98/1984 Half Moon Bay 78/1951 72/1982 Oakland DT 94/1974 100/1984 San Jose 95/1951 101/1984 Gilroy 98/1979 101/1974 Santa Cruz 94/1896 93/1984 Salinas 94/1974 84/2003 King City 104/1974 104/1984

MARINE. as of 08:40 AM PDT Tuesday . Generally light to moderate northwest winds will persist across the coastal waters as an upper ridge sits over California and an upper low slowly approaches from the southwest. Gusty northwest winds are expected through tomorrow across the northern waters. These winds will generate steep fresh swell resulting in hazardous seas conditions for small crafts. Mixed seas will continue with a short period northwest swell and a longer period southwest swell. A longer period northwest swell will arrive later this week.

MTR WATCHES/WARNINGS/ADVISORIES. Tday. Heat Advisory . CAZ506-507-510>513-516>518-528 SCA . Pt Arena to Pt Reyes 0-10 nm SCA . Pt Arena to Pigeon Pt 10-60 nm



PUBLIC FORECAST: RGass/Dykema AVIATION: Canepa MARINE: AS

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 13 mi55 min WNW 2.9 G 4.1 69°F 1011.9 hPa
RCMC1 - 9414863 - Richmond, CA 14 mi55 min S 1.9 G 1.9 64°F 64°F1012 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 15 mi45 min Calm 66°F 1012 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 16 mi55 min SW 1.9 G 2.9 65°F 1012.6 hPa
UPBC1 21 mi55 min WNW 5.1 G 6
FTPC1 - 9414290 - San Francisco, CA 21 mi55 min 61°F
MZXC1 - 9415102 - Martinez-Amorco CA 21 mi55 min W 6 G 6 70°F 68°F1011.9 hPa
PXSC1 22 mi55 min 64°F 57°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 22 mi55 min N 1.9 G 1.9 63°F 1011.2 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 22 mi55 min NW 4.1 G 4.1 63°F 1012.2 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 23 mi55 min NNW 1.9 G 2.9
OBXC1 23 mi55 min 64°F 59°F
46237 - San Francisco Bar, CA (142) 24 mi43 min 58°F5 ft
PCOC1 - 9415144 - Port Chicago, CA 25 mi55 min W 5.1 G 5.1 73°F 68°F1011.4 hPa
LNDC1 25 mi55 min SW 1.9 G 2.9 68°F 1011.9 hPa
AAMC1 - 9414750 - Alameda, CA 26 mi55 min W 4.1 G 4.1 66°F 69°F1012.1 hPa
SFXC1 - San Francisco Bay Reserve, CA 26 mi88 min W 1.9
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 30 mi33 min NNW 5.8 G 7.8 53°F 52°F1013.2 hPa51°F
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 33 mi55 min NW 1 G 2.9 76°F 1011.6 hPa
RTYC1 - 9414523 - Redwood City, CA 44 mi55 min E 2.9 G 4.1 70°F 72°F1012.5 hPa
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 44 mi33 min NNW 16 G 19 51°F 49°F1013.1 hPa49°F

Wind History for Richmond, CA
(wind in knots)    EDIT      (on/off)   Help
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
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
Last
24hr
SE2
SE3
SE4
S4
SE7
SE3
G7
SE4
G8
SE3
G7
SE5
G9
SE4
SE3
E2
G7
S6
G9
S8
G11
S6
G9
S5
S5
S2
G6
S4
N2
--
SE2
S2
S2
1 day
ago
S5
S4
SE5
S6
G9
S5
G8
S7
G10
SE4
G7
E5
G8
E4
SE3
G6
SE4
S6
G9
SE12
S5
G8
S4
S5
S1
S2
--
SE2
S3
SE2
SE2
SE2
2 days
ago
S3
S7
G10
S8
G11
S10
G13
S10
G14
S9
SW1
G8
SW2
S5
S3
S6
S10
G13
S8
S7
G10
S8
G12
S8
G11
S7
G10
S6
G10
SW4
G8
S4
G8
S4
SW2
SE3
S4

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Novato / Gnoss Field, CA4 mi18 minN 010.00 miFair79°F57°F48%1012.2 hPa
Petaluma Municipal Airport, CA12 mi18 minN 08.00 miFair77°F59°F54%1012.5 hPa
Napa, Napa County Airport, CA14 mi19 minSSW 410.00 miFair76°F59°F56%1011.2 hPa

Link to 5 minute data for KDVO

Wind History from DVO (wind in knots)
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
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
Last 24hrCalmCalmSE53S7SW12W9
G15
SW10
G15
SW11
G16
NE6N7N10N7N5N4CalmNW3CalmCalmNW4CalmCalmCalmCalm
1 day agoCalmCalm3SE8E76
G20
NW7
G13
4N12N4CalmCalmN6N4CalmCalmCalmNW3CalmCalmN4CalmCalmCalm
2 days agoNW6CalmW8NW9W9
G20
SW14SW14
G19
SW13
G19
SW8SW6CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm

Tide / Current Tables for Petaluma River entrance, San Pablo Bay, California
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Petaluma River entrance
Click for Map
Tue -- 03:09 AM PDT     5.92 feet High Tide
Tue -- 05:51 AM PDT     Sunrise
Tue -- 09:08 AM PDT     Moonrise
Tue -- 10:58 AM PDT     -0.81 feet Low Tide
Tue -- 05:55 PM PDT     4.59 feet High Tide
Tue -- 08:23 PM PDT     Sunset
Tue -- 10:54 PM PDT     2.83 feet Low Tide
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
3.74.65.55.95.85.24.12.81.40.2-0.6-0.8-0.50.41.52.63.74.44.64.43.93.432.8

Tide / Current Tables for Petaluma River Approach, San Pablo Bay, California Current
   EDIT      (on/off)   Help   One Week of Data
Petaluma River Approach
Click for Map
Tue -- 12:15 AM PDT     0.62 knots Max Flood
Tue -- 03:15 AM PDT     -0.00 knots Slack
Tue -- 05:51 AM PDT     Sunrise
Tue -- 06:46 AM PDT     -1.02 knots Max Ebb
Tue -- 09:08 AM PDT     Moonrise
Tue -- 11:21 AM PDT     0.00 knots Slack
Tue -- 02:14 PM PDT     0.55 knots Max Flood
Tue -- 06:31 PM PDT     -0.00 knots Slack
Tue -- 08:16 PM PDT     -0.23 knots Max Ebb
Tue -- 08:23 PM PDT     Sunset
Tue -- 10:33 PM PDT     0.00 knots Slack
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
0.60.60.40.1-0.3-0.7-1-1-0.9-0.7-0.4-0.10.20.50.50.50.50.30.1-0.1-0.2-0.2-0.10.1

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
Wind Forecast for San Francisco/Monterey Bay Area, CA (13,3,4,5)
      (on/off)   Help

Ground Weather Radar Station Sacramento, CA
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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. If you are subject to CCPA, Google ads on this site will not be based on your past behavior so you will likely not see an ad for a lawn mower just because you looked for one at a big box website. I do not believe this site is subject to CCPA but I am doing what I can to follow the guidelines 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.