Friday, February28, 2020
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L-36.com


Marine Weather and Tides
Norris Canyon, 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 6:39AMSunset 6:01PM Friday February 28, 2020 1:24 AM PST (09:24 UTC) Moonrise 9:25AMMoonset 10:51PM Illumination 23% 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
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PZZ531 San Francisco Bay South Of The Bay Bridge- 835 Pm Pst Thu Feb 27 2020
Tonight..NW winds around 5 kt.
Fri..NW winds around 5 kt.
Fri night..W winds 5 to 10 kt.
Sat..W winds 15 to 25 kt with gusts up to 35 kt.
Sat night..NW winds 15 to 25 kt with gusts up to 30 kt.
Sun..NW winds 10 to 20 kt with gusts up to 25 kt.
Sun night..N winds 10 to 15 kt.
Mon..NW winds 5 to 15 kt.
Tue..NW winds up to 10 kt.
PZZ500 835 Pm Pst Thu Feb 27 2020
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... High pressure over the great basin and off the california coast will keep light winds through Friday. Winds will increase Friday night and Saturday after a frontal system moves through. A moderate longer period northwest swell will move across the waters over the weekend.


7 Day Forecast for Marine Location Near Norris Canyon, CA
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location: 37.7, -121.99     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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FXUS66 KMTR 280550 AFDMTR

Area Forecast Discussion National Weather Service San Francisco Bay Area 950 PM PST Thu Feb 27 2020

SYNOPSIS. Unseasonably mild and dry conditions will persist over the region through the remainder of the work week with increasing clouds. A weather system will approach from the northwest this weekend, bringing cooler temperatures and the potential for isolated to scattered rain showers over the Central Coast on Sunday.

DISCUSSION. as of 9:50 PM PST Thursday . No significant updates planned for this evening. Lots of high clouds coming in from the south but with minimal impact on our weather. They will help to keep overnight lows mild with dewpoints hovering in the 40s. We tied or broke three more record highs today. Not expecting anymore records for Friday due to combination of cloud cover and increasing onshore flow by Friday afternoon. Satellite shows lots of stratus lurking just offshore and winds will turn distinctly onshore by Friday afternoon allowing for the beginning of a cooling trend.

Forecast focus for Saturday will be continued cooling ahead of the incoming cold front. Brisk onshore winds, stratus and cool advection will lead to inland cooling for Saturday with no more highs in the 70s.

We've been trying to track precip chances all week with the Sunday system. It looks like the best chance for showers will be Sunday afternoon over the higher terrain of Monterey/San Benito counties. Models bring core of cold air aloft with steep lapse rates leading to some convective showers along with snow levels down to around 3000 feet for the Central Coast. The rest of the Bay Area looks to stay dry on Sunday but there'll be a nip in the air with temps topping out in the upper 50s most locations. Dry high pressure rebuilds Monday through Thursday of next week. GFS has been showing increasing rain chances by around March 6-7th. NBM, Canadian and Euro solutions push the rain chances off closer to the March 9-10th time frame. Will be getting some fresh model sets shortly and evaluate overnight.

PREV DISCUSSION. as of 01:54 PM PST Thursday . Low clouds and fog persist offshore this afternoon as temperatures inland have warmed into the 70s to near 80 deg F in the warmest interior locations. This is as high pressure continues to dominate the weather pattern over California and will do so through Friday. In addition, high clouds advecting inland over the Central Coast can also be seen in visible satellite at this hour.

Not expecting too much change in the next 24 hours except for an increase in cloud cover and slight cooling near the coast on Friday. This will be the result of high pressure aloft weakening ahead of an approaching mid/upper level trough to the north. Look for daytime temperatures to remain above seasonal averages with upper 60s to near 70 deg F at the coast and widespread 70s in the interior.

A more robust cooling trend will occur on Saturday with afternoon temperatures dropping a good 10 to 15 deg compared to late week as onshore flow increases. As the main mid/upper level trough drops southward across the region and becomes a cut-off low Saturday night into Sunday, there will be the potential for some showers across the region. The latest thinking is that the best chance of any precipitation will be from the Santa Cruz Mountains inland and southward throughout the Central Coast during the morning and afternoon hours on Sunday. Cannot rule out the possibility of an isolated thunderstorms or two or at least convective showers with small hail early Sunday afternoon across the Central Coast. Regardless, widespread beneficial rainfall is unlikely to occur with this passing system. Snow showers will also be possible in the higher elevations of the Central Coast as well with snow levels falling to below 3,000 feet Saturday night into Sunday morning. Breezy to locally gusty winds will also develop late Saturday night into Sunday, especially near the coast and in the hills. However, winds are likely to remain below advisory criteria with only a few gusts in the region's highest peaks to reach/exceed 45 mph.

Cooler overnight temperatures are also likely Sunday morning and again Monday morning as winds diminish and sky conditions clear. This will allow for more widespread 30s across the interior with 40s elsewhere. However, widespread freezing temperatures appear unlikely at this time. A slight warming trend is then forecast through at least the middle part of next week as a ridge of high pressure builds back in across the region in wake of the exiting mid/upper level trough. Thus, look for the return of mild and dry conditions region-wide.

AVIATION. as of 9:35 PM PST Thursday . Stratus has developed along the coast but light offshore flow will continue just above the surface through Friday keeping VFR conditions over the terminals.

Vicinity of KSFO . VFR.

SFO Bridge Approach . Similar to KSFO.

Monterey Bay Terminals . VFR. East to southeast winds 5-10 kt through midmorning.

MARINE. as of 09:35 PM PST Thursday . High pressure over the Great Basin and off the California coast will keep light winds through Friday. Winds will increase Friday night and Saturday after a frontal system moves through. A moderate longer period northwest swell will move across the waters over the weekend.

MTR WATCHES/WARNINGS/ADVISORIES. Tngt. NONE.



PUBLIC FORECAST: RWW AVIATION: W Pi MARINE: W Pi

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
AAMC1 - 9414750 - Alameda, CA 17 mi54 min N 2.9 G 4.1 59°F 58°F1020.4 hPa
LNDC1 17 mi54 min NW 1.9 G 1.9 59°F 1020.4 hPa
RTYC1 - 9414523 - Redwood City, CA 18 mi54 min SE 2.9 G 2.9 58°F 61°F1021.1 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 19 mi60 min N 5.1 G 5.1
OBXC1 20 mi54 min 58°F 54°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 20 mi54 min NNW 2.9 G 4.1 57°F 1020.5 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 22 mi54 min NW 2.9 G 5.1 59°F 1019.6 hPa
PXSC1 23 mi54 min 60°F 51°F
UPBC1 24 mi54 min W 1 G 1.9
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 24 mi54 min NW 4.1 G 4.1 57°F 1020.4 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 24 mi54 min SSW 1.9 G 2.9 54°F 57°F1020.6 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 24 mi54 min N 8.9 G 11 58°F 1020.8 hPa
PCOC1 - 9415144 - Port Chicago, CA 25 mi54 min S 6 G 8 54°F 56°F1020.2 hPa
FTPC1 - 9414290 - San Francisco, CA 26 mi54 min 56°F
RCMC1 - 9414863 - Richmond, CA 27 mi54 min Calm G 4.1 58°F 55°F1020.2 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 28 mi61 min NNW 4.1 61°F 1020 hPa (-1.0)
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 29 mi54 min N 1 G 1.9 56°F 1020.4 hPa
46237 - San Francisco Bar, CA (142) 35 mi54 min 53°F6 ft
SFXC1 - San Francisco Bay Reserve, CA 35 mi99 min WSW 1.9
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 45 mi34 min NW 9.7 G 12 51°F 53°F7 ft1021.1 hPa

Wind History for Alameda, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hayward, Hayward Air Terminal, CA7 mi30 minN 010.00 miFair57°F44°F62%1021.2 hPa
Livermore, Livermore Municipal Airport, CA9 mi31 minENE 310.00 miFair52°F43°F72%1020.5 hPa
Oakland, Metro Oakland International Airport, CA12 mi31 minN 010.00 miMostly Cloudy57°F50°F78%1020.9 hPa
Palo Alto Airport, CA17 mi4.6 hrsN 010.00 miClear57°F51°F82%1021 hPa
San Carlos Airport, CA18 mi29 minN 010.00 miFair57°F46°F67%1020.7 hPa
Concord, Buchanan Field, CA20 mi31 minSSE 310.00 miFair53°F43°F69%1019.2 hPa
San Francisco, San Francisco International Airport, CA20 mi88 minN 010.00 miA Few Clouds59°F46°F64%1020.4 hPa
San Jose, San Jose International Airport, CA23 mi31 minN 010.00 miFair58°F44°F60%1020.3 hPa

Link to 5 minute data for KHWD

Wind History from HWD (wind in knots)
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Last 24hrNE6NE4NE5E3CalmNE5CalmCalmS4SW4W4W6W6W6W7NW6W6CalmNE8NE6NE3E3E3Calm
1 day agoE3CalmCalmCalmCalmNE5S3S4CalmW4NW5W8W8W6W8W8W6NW5CalmCalmCalmCalmE3NE5
2 days agoCalmCalmE4E5CalmCalmNE4CalmSW4SW5CalmNE12
G18
4W9SW5N9CalmSW3CalmNE7E4E4E4E4

Tide / Current Tables for Roberts Landing, 1.3 miles west of, San Francisco Bay, California
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Roberts Landing
Click for Map
Fri -- 03:06 AM PST     6.65 feet High Tide
Fri -- 06:41 AM PST     Sunrise
Fri -- 09:25 AM PST     Moonrise
Fri -- 09:49 AM PST     1.64 feet Low Tide
Fri -- 03:27 PM PST     5.65 feet High Tide
Fri -- 06:00 PM PST     Sunset
Fri -- 09:38 PM PST     1.93 feet Low Tide
Fri -- 10:51 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.95.26.26.66.45.74.63.42.41.81.72.134.155.65.65.14.33.42.5222.5

Tide / Current Tables for Little Coyote Pt 3.4 mi NNE, South San Francisco Bay, California Current
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Little Coyote Pt 3.4 mi NNE
Click for Map
Fri -- 02:52 AM PST     -0.00 knots Slack
Fri -- 06:09 AM PST     -0.62 knots Max Ebb
Fri -- 06:42 AM PST     Sunrise
Fri -- 09:25 AM PST     Moonrise
Fri -- 09:30 AM PST     0.00 knots Slack
Fri -- 12:19 PM PST     0.43 knots Max Flood
Fri -- 03:28 PM PST     -0.00 knots Slack
Fri -- 06:01 PM PST     Sunset
Fri -- 06:30 PM PST     -0.49 knots Max Ebb
Fri -- 09:23 PM PST     0.00 knots Slack
Fri -- 10:51 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.50.40.2-0-0.3-0.5-0.6-0.5-0.3-0.10.10.30.40.40.30.1-0.1-0.3-0.5-0.5-0.3-0.10.10.3

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 (4,6,7,8)
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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.