Wednesday, October17, 2018 L-36.com


Marine Weather and Tides
Stanford, CA

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:18AMSunset 6:29PM Wednesday October 17, 2018 2:39 AM PDT (09:39 UTC) Moonrise 2:03PMMoonset 12:00AM Illumination 54% Phase: First Quarter Moon; Moon at 8 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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PZZ530 San Pablo Bay, Suisun Bay, The West Delta And The San Francisco Bay North Of The Bay Bridge- 218 Am Pdt Wed Oct 17 2018
Today..E winds up to 10 kt...becoming sw this afternoon.
Tonight..SW winds 5 to 10 kt.
Thu..W winds up to 10 kt.
Thu night..SW winds 5 to 10 kt.
Fri..W winds up to 10 kt.
Fri night..SW winds 5 to 10 kt.
Sat..NW winds up to 10 kt.
Sun..W winds up to 10 kt.
PZZ500 218 Am Pdt Wed Oct 17 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Predominately light northwest winds through the the forecast period. Locall breezy northwest winds will develop through the usual coastal jets near the coast. A long period northwest swell will arrive on Wednesday bringing an increased risk of rip currents and sneaker waves. SWell period will decrease Wednesday night and Thursday.


7 Day Forecast for Marine Location Near Stanford, CA
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location: 37.45, -122.17     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 170459
afdmtr
area forecast discussion
national weather service san francisco bay area
959 pm pdt Tue oct 16 2018

Synopsis Seasonably warm days followed by mostly clear and cool
nights will continue the rest of the week and into the weekend.

The forecast remains dry through the middle of next week.

Discussion As of 9:21 pm pdt Tuesday... Just some minor
forecast updates this evening to account for low cloud formation
over the ocean. So far only watsonville and half moon bay are
reporting some clouds with vsby 4 miles at half moon bay. Earlier
we talked to observers at the farallones and they indicated no
fog. In fact cloud heights are surprisingly high at half moon bay
around 2000 feet. Often when the stratus returns after offshore
flow its very shallow. It was another sunny a pleasant october day
across the bay area with lots of highs in the 70s and 80s.

We've still got large scale offshore flow from the nevada deserts
at nearly 10 mb with the local sfo-sac 1.5 mb onshore. So we
continue to see warm dry conditions in the hills with light
offshore winds while some local onshore breezes squeeze through
the valleys and coastal gaps.

Latest 00z NAM shows 500 mb ridge building to our north with a
weak low to our south that will keep warm and dry weather at least
through Friday with 70 80s days and 40s 50s at night.

No big changes through the weekend. Continued dry and seasonable.

Prev discussion As of 1:52 pm pdt Tuesday... The upper level
pattern over the region will change little through midweek as
mid upper level high pressure over the eastern pacific extends
inland over the pacific northwest and an upper level low remains
over the desert southwest. This will keep light offshore winds
across the interior and result in seasonably warm conditions each
afternoon. Mostly clear conditions are likely overnight with
seasonably cool temperatures in the lower elevations while mild
temperatures persist in the hills mountains with continued
offshore winds.

By late in the week, weak onshore flow will potentially develop
as the upper level low slowly moves to the northeast and high
pressure builds further inland across the west coast. This may
allow for a shallow marine layer to develop with the development
of coastal stratus during the late night and early morning hours.

However, confidence is low at this time and widespread cloud cover
is not currently expected through late week. This too may cool
conditions a bit near the coast as offshore flow remains confined
to the inland areas. This will likely lead to pleasant fall
weather conditions over the region through the upcoming weekend.

The medium range models continue to suggest a possible pattern
shift early next week as an upper level trough approaches the
pacific northwest. This would likely at least result in a cooling
trend region-wide with rain chances increasing over northern
california late Monday into Tuesday. Unsettled weather conditions
look to linger into late next week as well with precipitation
dropping as far south as the north bay. However, confidence
remains low on widespread rainfall actually developing over our
region late in the forecast period. Will need to monitor in the
coming days.

Aviation As of 10:00 pm pdt Tuesday... Satellite image shows
areas of stratus over the waters. Stratus is filling mry bay and
should spread into mry and sns. Latest NAM guidance shows cigs
into sfo and oak early morning so have added that into the tafs.

Vicinity of ksfo... Occasional MVFR CIGS between 12z and 16z.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Ifr CIGS after 07z clearing after 17z.

Marine As of 09:33 pm pdt Tuesday... High pressure over the
eastern pacific coupled with a thermal trough along the coast will
maintain light northwest winds through Sunday. A long period
northwest swell will arrive on Wednesday bringing an increased
risk of rip currents and sneaker waves. Swell period will decrease
Wednesday night and Thursday.

Mtr watches warnings advisories
Tngt None.

Public forecast: rww
aviation: W pi
marine: W pi
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 5 mi39 min W 1.9 G 2.9 56°F 67°F1018.6 hPa (+0.0)
AAMC1 - 9414750 - Alameda, CA 23 mi39 min WNW 4.1 G 5.1 56°F 65°F1018.3 hPa (+0.0)
LNDC1 25 mi39 min W 4.1 G 6 56°F 1018 hPa (+0.0)
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 26 mi39 min SW 7 G 8.9
OKXC1 - 9414776 - Oakland (Berth 34), CA 26 mi39 min SSW 1.9 G 4.1 56°F 1018.1 hPa (+0.0)
OBXC1 26 mi39 min 57°F 55°F
PXSC1 27 mi39 min 57°F 55°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 27 mi39 min WSW 4.1 G 7 56°F 1016.9 hPa (+0.0)
FTPC1 - 9414290 - San Francisco, CA 29 mi39 min S 1 G 2.9 56°F 60°F1018.2 hPa (+0.0)
PPXC1 - 9414847 - Richmond (Point Potrero), CA 33 mi45 min SSW 8 G 13 57°F 1018.1 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 34 mi40 min SW 1.9 54°F 1018 hPa
46237 - San Francisco Bar, CA (142) 34 mi39 min 59°F3 ft
RCMC1 - 9414863 - Richmond, CA 35 mi39 min S 1.9 G 5.1 57°F 63°F1017.8 hPa (+0.0)
MZXC1 - 9415102 - Martinez-Amorco CA 40 mi39 min WNW 14 G 16 58°F 64°F1017.3 hPa (+0.0)58°F
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 41 mi39 min NW 7.8 G 14 56°F 58°F1018.6 hPa (-0.4)
PCOC1 - 9415144 - Port Chicago, CA 42 mi39 min W 15 G 18 58°F 65°F1017.2 hPa (+0.4)
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 42 mi39 min WSW 8.9 G 14 57°F 1017.4 hPa (+0.4)
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 43 mi39 min WNW 11 G 15 60°F 1016.6 hPa (+0.5)
46042 - MONTEREY - 27NM West of Monterey Bay, CA 48 mi49 min NNW 9.7 G 14 57°F 62°F3 ft1017.5 hPa (+0.0)
46092 - MBM1 49 mi84 min NNE 3.9 57°F 63°F1018 hPa (+0.0)
ELXC1 - Elkhorn Slough Reserve, CA 49 mi54 min SE 1.9 50°F 1018 hPa50°F

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Carlos Airport, CA7 mi44 minN 010.00 miFair54°F46°F77%1017.9 hPa
Mountain View, Moffett Field, CA7 mi43 minN 010.00 miFair53°F46°F80%1018.4 hPa
San Jose, San Jose International Airport, CA14 mi46 minW 310.00 miFair56°F42°F60%1017.9 hPa
San Francisco, San Francisco International Airport, CA15 mi43 minW 910.00 miA Few Clouds52°F50°F93%1017.7 hPa
Hayward, Hayward Air Terminal, CA15 mi45 minN 010.00 miFair53°F44°F72%1018.8 hPa
Oakland, Metro Oakland International Airport, CA17 mi46 minWNW 710.00 miA Few Clouds55°F52°F90%1018.1 hPa
San Jose / Reid / Hillv, CA20 mi4.7 hrsVar 410.00 miClear59°F46°F63%1017.6 hPa

Wind History from PAO (wind in knots)
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Last 24hr----------------------Calm45N6N10N10N8N8N9N13NW13NW8Calm
1 day ago------------------Calm5NE10N7N64--N55N10N10NW10NW10NW10NW10
2 days ago------------------4----E5NE5--N11N10NW11NW10N10NW10NW8NW64

Tide / Current Tables for Palo Alto Yacht Harbor, San Francisco Bay, California
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Dumbarton Hwy Bridge, South San Francisco Bay, California Current
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Dumbarton Hwy Bridge
Click for Map
Wed -- 12:28 AM PDT     Moonset
Wed -- 02:45 AM PDT     0.01 knots Slack
Wed -- 06:13 AM PDT     1.28 knots Max Flood
Wed -- 07:18 AM PDT     Sunrise
Wed -- 09:12 AM PDT     -0.00 knots Slack
Wed -- 11:54 AM PDT     -0.46 knots Max Ebb
Wed -- 03:02 PM PDT     Moonrise
Wed -- 03:15 PM PDT     0.00 knots Slack
Wed -- 05:57 PM PDT     0.72 knots Max Flood
Wed -- 06:28 PM PDT     Sunset
Wed -- 08:25 PM PDT     -0.00 knots Slack
Wed -- 11:57 PM PDT     -0.91 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.8-0.6-0.30.20.81.11.31.20.80.2-0.2-0.4-0.5-0.4-0.3-0.10.30.60.70.60.3-0.2-0.6-0.8

Weather Map and Satellite Images
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wmap_P
GOES 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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for San Francisco/Monterey Bay Area, CA (5,6,7,8)
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Ground Weather Radar Station San Francisco Bay Area, CA
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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.