Saturday, January20, 2018

Marine Weather and Tides
Point Arena, CA

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 7:19AMSunset 5:22PM Saturday January 20, 2018 6:48 PM PST (02:48 UTC) Moonrise 9:48AMMoonset 9:15PM Illumination 19% 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
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7 Day Forecast for Marine Location Near Point Arena, CA
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location: 36.95, -126.32     debug

Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 202335
area forecast discussion
national weather service san francisco bay area
335 pm pst Sat jan 20 2018

Synopsis Dry and cool weather is forecast for the rest of today
and tonight. The next system is expected to spread rain across
primarily the northern portion of the forecast area from late
Sunday through Sunday night. The weather pattern will remain
active into next week, with more rain likely by midweek.

Discussion As of 1:51 pm pst Saturday... Satellite is showing
clear skies and temperatures a still cool with readings all in the
50s. Looking for mostly clear skies tonight and chilly overnight
temperatures once again. Inland valleys in southern monterey and
san benito counties could see patchy frost. Coldest minimum temps
in the inland valley locations could be in the lower to mid 30s.

Most of Sunday is expected to be dry with the next storm system
forecast to approach the area by afternoon. Rain is expected to
begin in the north bay late Sunday and spread south by Monday
morning. Latest model runs keep the bulk of the precip from the
bay area north, with not much rain expected as far south as
monterey and san benito counties. There are still differences in
model solutions regarding QPF and timing. The locally run WRF has
the most rain forecast for the higher terrain of northern sonoma
and napa counties with storm total rainfall of 2.5". The GFS has
1.5" for the same locations, with the ECMWF giving the area less
than an inch. Our storm-total QPF gives this area just over 2
inches, with 0.25-0.75" for most of the san francisco bay area,
tapering off to less than a quarter of an inch for san jose south,
except for around a half inch in the santa cruz mountains.

After this system moves through, the next one to affect the area
is due late Wednesday into Thursday. This system looks colder and
more robust than the one earlier in the week with a cold upper
low a little farther south. This system is expected to spread
precipitation throughout the CWA with 1-2" in the coastal hills,
to up to 3 4 inch elsewhere.

After this second system exits the area, high pressure is forecast
to build over the eastern pacific for drying conditions into next

Aviation As of 3:35 pm pst Saturday for 00z Sunday tafs.VFR
conditions are expected to prevail through the afternoon and into
the early night hours. The forecast gets a bit more challenging
after midnight pst as increasing clouds are expected in advance of
an approaching storm system. High resolution guidance suggests
the possibility of some MVFR ceilings in the san francisco bay
area with a nearly-saturated boundary layer, though confidence
remains low at this time. Will continue to monitor incoming
forecast guidance and amend as necessary. Precipitation will make
its way into the north bay around after 18z Sunday, and
subsequently spread south of the golden gate around after 00z

Vicinity of ksfo...VFR conditions expected through the evening and
early night hours. MVFR ceilings are possible after 10 or 12z
Sunday, but confidence remains low at this time. West winds around
15 kt this afternoon will subside after sunset, and gradually
back to the south overnight and into Sunday. Gusty conditions
possible after 00z Monday.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR conditions are expected to prevail
with few sct clouds. Can't rule out a tempo bkn period with MVFR
ceilings, but confidence is low. Onshore winds around 10 to 15 kt
this afternoon will diminish after sunset.

Marine As of 03:18 pm pst Saturday... Breezy northwest winds
today as high pressure remains offshore. Winds will gradually
taper off into tonight as the ridge weakens and moves inland.

Winds increase and back to become southwesterly later tomorrow
ahead of an arriving cold front. The wave train that arrived
earlier in the week continues to weaken, however, hazardous
conditions remain possible through the next couple of days as wave
heights align with the period. A new northwest wave train arrives
Sunday evening.

Mtr watches warnings advisories
Tngt Sca... Pigeon pt to pt pinos 0-10 nm until 3 am
sca... Pt arena to pt reyes 0-10 nm
sca... Pt reyes to pigeon pt 0-10 nm
sca... Pt pinos to pt piedras blancas 0-10 nm
sca... Pt arena to pigeon pt 10-60 nm
sca... Pigeon pt to pt piedras blancas 10-60 nm
sca... Rough bar advisory for sf bar until 9 pm
sca... Mry bay until 9 pm
public forecast: sims
aviation: rowe
marine: drp
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Weather Reporting Stations
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Airport Reports
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Tide / Current Tables for
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Tide / Current Tables for
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Weather Map and Satellite Images
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Weather Map
IR Satellite Image from GEOS

GOES Local Image of CentralWestCoast    EDIT

Wind Forecast for San Francisco/Monterey Bay Area, CA (21,6,7,8)
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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 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 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.