Tuesday, December10, 2019
Privacy Policy
L-36.com


Marine Weather and Tides
San Jose, CA

Version 3.4
NOTICE
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.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 7:09AMSunset 4:51PM Tuesday December 10, 2019 8:52 AM PST (16:52 UTC) Moonrise 4:03PMMoonset 5:30AM Illumination 99% Phase: Waxing Gibbous; Moon at 14 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
PZZ535 Monterey Bay- 810 Am Pst Tue Dec 10 2019
Today..NE winds around 5 kt, becoming W this afternoon. Wind waves 1 ft. W swell 3 to 5 ft at 14 seconds and S around 2 ft at 15 seconds.
Tonight..SE winds around 5 kt. Wind waves 1 ft. W swell 3 to 5 ft at 15 seconds and S around 2 ft at 15 seconds. A slight chance of rain.
Wed..NE winds around 5 kt. Wind waves 1 ft. W swell 5 to 7 ft at 14 seconds and S around 2 ft at 13 seconds.
Wed night..E winds around 5 kt. Wind waves 1 ft. W swell 5 to 7 ft at 14 seconds.
Thu..SW winds around 5 kt. Wind waves 1 ft. W swell 5 to 7 ft at 20 seconds.
Thu night..W winds around 5 kt. Wind waves 1 ft. W swell 7 to 9 ft at 18 seconds.
Fri..NW winds up to 10 kt. Wind waves 1 ft. W swell 8 to 10 ft.
Sat..NW winds 5 to 15 kt. Wind waves 1 to 2 ft. W swell 6 to 8 ft. Locally lower winds and seas across sheltered portions of the bay.
PZZ500 810 Am Pst Tue Dec 10 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... A weak cold front will turn winds southerly today and bring a chance of showers this evening and into Wednesday. Light to moderate southerly winds will then continue through much of the week before shifting back out of the northwest towards the weekend. Moderate northwest swell will also persist before a longer period northwest swell arrives on Thursday. Wave heights will gradually build heading into the coming weekend creating hazardous seas conditions, particularly for smaller vessels.


7 Day Forecast for Marine Location Near San Jose, CA
   Hourly   EDIT   Help
location: 37.26, -121.78     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
FXUS66 KMTR 101138 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 338 AM PST Tue Dec 10 2019

SYNOPSIS. Dry conditions with mild temperatures are forecast through most of today. A weak weather system will likely produce light rain from late today into early Wednesday, mainly in the San Francisco Bay Area. Rain chances will continue in the North Bay through much of the remainder of the week, although any rain that falls is expected to be light. Generally dry weather is forecast for areas south of the Golden Gate from Wednesday through Friday. Rain chances will become more widespread on Saturday before dry weather returns Sunday and Monday.

DISCUSSION. As of 3:10 AM PST Tuesday . A band of thick high clouds has spread over our forecast area overnight, reducing outgoing longwave radiation. This is not only helping to keep overnight temperatures somewhat elevated, but also inhibiting fog formation. Surface relative humidity values are anywhere from 5 to 15 percent drier than 24 hours ago and fog is currently absent in most areas. Present conditions are much different than early yesterday morning when areas of dense fog had formed. High clouds are expected to persist for the remainder of the night and so any fog that does develop by daybreak is likely to remain patchy.

Less low level moisture this morning will mean earlier clearing of patchy low clouds today. Also, high clouds are expected to diminish by this afternoon. More sun today should mean slightly warmer temperatures than yesterday.

Early morning satellite imagery shows a system approaching from the west out near 130W. Although this system is relatively weak, it has tapped into a relatively moist airmass from the southwest with precipitable water values as high as 1.4 inches. So, although models indicate weakening as the system moves inland over California, there should be sufficient moisture to produce at least light rain across much of the SF Bay Area from late this afternoon through tonight. A few showers may linger into Wednesday morning. Rain totals through Wednesday morning are forecast to be less than a quarter inch, except locally up to a third of an inch in the coastal hills of Sonoma County. Winds are not expected to be a factor with this system, with wind gusts of only about 20 mph forecast along the coast overnight.

Once the incoming system passes tonight, the models agree that a moist zonal flow will develop across the Eastern Pacific and into the Pacific Northwest and far northern California. Weak impulses moving through this moist zonal flow may generate light rain as far south as the North Bay from time to time from late Wednesday through Friday night. A shortwave trough moving in from the northwest late in the week may then generate more widespread rainfall across our area on Saturday. However, the models have been backing off on precipitation potential on Saturday, and where rain does fall, amounts are expected to be light. Rainfall totals for the entire week, from late today through Saturday, are forecast to be a quarter of an inch of less from San Francisco southward . and from 0.25 to 1" in the North Bay. Onshore flow through the week will maintain seasonable daytime temperatures and mild nighttime temps.

Dry weather is expected to return to the entire forecast area on Sunday and Monday. Longer range models maintain a progressive pattern into next week, with at least two systems potentially impacting our area. The systems next week, while not currently expected to be overly strong or wet, at least appear likely to generate more widespread and significant rainfall than what is forecast this week.

AVIATION. as of 03:38 AM PST Tuesday . For 12z TAFs. Much of the stratus over the region last evening has cleared out as high clouds move overhead, but patches remain based on current observations. High clouds obstructing the view of the surface on satellite making it difficult to discern the extent of the remaining stratus. Obs show conditions ranging from VFR to IFR with cigs between 800 ft and 2500 ft AGL. Expect patchy low clouds to continue this morning creating occasional MVFR/IFR conditions. Patches of fog may also develop once the high clouds move out, although satellite does show another set of higher clouds just behind this current one. Depending on how things unfold, tafs may need to be amended should fog develop. Low confidence this morning on cigs/vis. Clouds expected to lift this afternoon with mid/high level clouds continuing ahead of the next system. Cigs will lower again this evening as showers move in from north to south. Generally light winds expected through the period at or less than 10 kt. Winds to turn southerly by this evening ahead of the front.

Vicinity of KSFO . Intermittent VFR/MVFR conditions due to low clouds at around 1500 to 2500 ft along with higher clouds. It is possible that the stratus will expand further once the high clouds have moved out, however, satellite does show another set of higher clouds after a brief gap. Patchy fog early this morning is also a possibility. Low confidence forecast for vis/cigs. Guidance suggests cigs will lift this afternoon with mid/high level clouds continuing ahead of the next system. High res models show light showers arriving at around 02z-04z this evening. Expect cigs to also lower once again by tonight. Light winds this morning becoming NW this afternoon and turning southerly this evening.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . High clouds obstructing view of surface conditions around the Peninsula. Obs show less extensive stratus than was seen last evening. Patchy low clouds and fog still possible this morning before lifting in the afternoon. Cigs will lower again this evening and overnight as a weak frontal system approaches. Generally light SE winds this morning to turn onshore this afternoon.

MARINE. As of 2:08 AM PST Tuesday . Generally light winds will persist over the coastal waters as a weak system approaches. A weak cold front will turn winds southerly today and bring a chance of showers this evening and into Wednesday. Light to moderate southerly winds will then continue through much of the week before shifting back out of the northwest towards the weekend. Moderate northwest swell will also persist before a longer period northwest swell arrives on Thursday. Wave heights will gradually build heading into the coming weekend creating hazardous seas conditions, particularly for smaller vessels.

MTR WATCHES/WARNINGS/ADVISORIES. Tday. None.

PUBLIC FORECAST: Dykema AVIATION: AS 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
RTYC1 - 9414523 - Redwood City, CA 29 mi52 min NNE 1 G 1.9 53°F 57°F1025 hPa (+1.1)
ELXC1 - Elkhorn Slough Reserve, CA 31 mi67 min Calm 48°F 1024 hPa47°F
MLSC1 - Moss Landing, South Harbor, CA 32 mi30 min Calm G 2.9 50°F 1025.1 hPa (+1.4)47°F
46092 - MBM1 38 mi45 min E 7.8 53°F 57°F1023.9 hPa (+1.2)
46240 - Cabrillo Point, Monterey Bay, CA (158) 44 mi52 min 57°F2 ft
AAMC1 - 9414750 - Alameda, CA 45 mi52 min E 1.9 G 2.9 53°F 55°F1024.7 hPa
46042 - MONTEREY - 27NM West of Monterey Bay, CA 46 mi32 min N 1.9 G 5.8 55°F 57°F1024.3 hPa50°F
LNDC1 46 mi52 min ENE 1.9 G 4.1 53°F 1024.6 hPa (+1.2)
MEYC1 46 mi76 min 58°F1023.9 hPa
46114 - West Monterey Bay, CA 48 mi22 min 57°F5 ft
OBXC1 48 mi52 min 53°F 51°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 48 mi52 min NE 4.1 G 5.1 52°F 1024.7 hPa (+1.2)
PXOC1 - 9414311 - San Francisco (Pier 1), CA 49 mi52 min NNW 6 G 7 51°F 1023.8 hPa (+1.3)

Wind History for Redwood City, CA
(wind in knots)    EDIT      (on/off)   Help
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
3
AM
4
AM
5
AM
6
AM
7
AM
Last
24hr
SW3
SW1
S2
SE2
E3
G6
NE4
N4
N4
N4
G7
N3
NW4
NW5
N4
NW1
N1
E1
SE4
S3
--
N2
W3
SW1
S1
S3
1 day
ago
SW1
S4
--
NW3
G6
N4
N6
NW6
G9
NW7
NW7
W5
NW3
NW4
NW3
W3
W4
SE2
S1
--
--
S3
SW1
N1
E2
SE1
2 days
ago
SE12
G19
SE11
G21
S10
G20
S9
G18
S9
G14
S8
G15
S6
G12
NE3
S4
G8
SW5
S5
G8
S3
G6
S4
G8
SW7
SE1
NE2
NE3
--
N2
E2
E2

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Jose / Reid / Hillv, CA6 mi2.1 hrsVar 36.00 miFog/Mist48°F46°F94%1023.7 hPa
San Jose, San Jose International Airport, CA11 mi59 minNW 39.00 miMostly Cloudy51°F46°F86%1024.9 hPa
Watsonville, Watsonville Municipal Airport, CA22 mi59 minNW 36.00 miFog/Mist47°F45°F93%1024.6 hPa
Palo Alto Airport, CA24 mi65 minNNW 47.00 miPartly Cloudy50°F46°F88%1025.1 hPa

Link to 5 minute data for KRHV

Wind History from RHV (wind in knots)
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
3
AM
4
AM
5
AM
6
AM
7
AM
Last 24hr--------W4CalmCalmW4NW4NW3--NW6--4Calm----------------3
1 day agoCalmCalmCalmCalmW3NW6N8NW7NW8----------------------------Calm
2 days agoS6S12
G17
S8SE12S12S13
G18
SE14
G20
S12SE12
G15
S103NE4S6S3E5----------------Calm

Tide / Current Tables for Gold Street Bridge, Alviso Slough, San Francisco Bay, California
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Gold Street Bridge
Click for Map
Tue -- 05:30 AM PST     Moonset
Tue -- 05:48 AM PST     2.55 feet Low Tide
Tue -- 07:11 AM PST     Sunrise
Tue -- 10:44 AM PST     10.26 feet High Tide
Tue -- 04:03 PM PST     Moonrise
Tue -- 04:49 PM PST     Sunset
Tue -- 06:51 PM PST     -0.40 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
7.36.95.94.73.52.82.63.65.689.810.29.78.56.64.52.50.8-0.1-0.40.42.14.26.1

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 -- 03:32 AM PST     -0.69 knots Max Ebb
Tue -- 05:31 AM PST     Moonset
Tue -- 05:36 AM PST     0.00 knots Slack
Tue -- 07:11 AM PST     Sunrise
Tue -- 08:11 AM PST     1.06 knots Max Flood
Tue -- 11:05 AM PST     -0.01 knots Slack
Tue -- 03:47 PM PST     -1.38 knots Max Ebb
Tue -- 04:03 PM PST     Moonrise
Tue -- 04:50 PM PST     Sunset
Tue -- 06:34 PM PST     0.01 knots Slack
Tue -- 09:16 PM PST     1.38 knots Max Flood
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
-0.1-0.3-0.6-0.7-0.6-0.30.20.81.110.60.1-0.4-0.8-1.1-1.3-1.4-1-0.40.411.41.31

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 (11,2,3,4)
      (on/off)   Help

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

Ad by Google

Cookie Policy:
This webiste uses cookies to save your settings. No personal information is saved. 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. I do not keep site logs longer than I need to to keep bad actors off the site. Basically, I delete them after looking at them. 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 numerious 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.