Monday, August19, 2019 L-36.com


Marine Weather and Tides
Point Arena, CA

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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 6:27AMSunset 7:59PM Monday August 19, 2019 7:45 PM PDT (02:45 UTC) Moonrise 9:42PMMoonset 9:28AM Illumination 80% Phase: Waning Gibbous; Moon at 19 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 200026
afdmtr
area forecast discussion
national weather service san francisco bay area
526 pm pdt Mon aug 19 2019

Synopsis A deep marine layer will prevail through today,
maintaining widespread morning low clouds and cooler than normal
inland temperatures. Warmer temperatures will develop by midweek
and continue through the upcoming weekend as high pressure
rebuilds.

Discussion As of 1:52 pm pdt Monday... The deep marine layer
has prevented the usual mid-day clearing across parts of the san
francisco bay area and central california coast. As of 1 pm pdt,
monterey, san francisco, and oakland airports were all still
reporting overcast skies. While the slow and gradual clearing
trend is expected to continue as the afternoon progresses, some
locations along the immediate pacific coast may not see the sun
shine at all today. The clouds are influencing temperature trends
this afternoon as most airports are running about 2 to 7 degrees
cooler than 24 hours ago. By the time the afternoon concludes,
high temperatures will reach the 60s along the immediate coast and
70s to 80s for inland locations. The low clouds are expected to
return again tonight with the chance of some light drizzle along
the pacific coast.

Synoptically, an upper level ridge presently centered over the
southern plains is forecast to build and broaden westward towards
the desert southwest and baja california over the next several
days. This will result in a gradual compression of the marine
layer by the middle of the week. Additionally, a noticeable
warming trend will take place through at least mid-week with the
most significant day-to-day warm-up occurring from Tuesday to
Wednesday. Low 90s will become increasingly more likely on
Wednesday across some of the region's typical hot spots such as
king city, gilroy, livermore, and even santa rosa. Can't rule out
some rural far-inland locations approaching the upper 90s low
100s, but at this point don't think last the MAX temperatures
achieved last week will be repeated this week for the core
population centers.

Forecast guidance shows an upper level trough approaching the
pacific northwest on Wednesday and Thursday with some
precipitation potential for parts of oregon and washington state.

While the san francisco bay area will be well south of any
precipitation chances, the positioning of this trough will help
prevent additional warming for our region. The current forecast by
late week and into the weekend calls for forecast highs to
generally fall within a several degrees of normal along the coast
with inland locations at or slightly above normal.

As mentioned in the previous overnight discussion, models are
suggesting the potential for an uptick in tropical activity well
to our south along the baja california coast by the weekend and
into early next week. There still remains plenty of uncertainty
this far out, but will have to keep tabs on any development as
northbound moisture transport to parts of the southern california
coast and possibly even the central california coast isn't
completely out of the question by early next week.

Aviation As of 4:56 am pdt Monday... For 00z tafs. The marine
layer remains deep this afternoon having risen to over 3000 ft agl
per the fort ord profiler. Stratus remains in pockets along the
coast and is expected to make an early return to area terminals
this evening. MVFR to ifr CIGS anticipated to prevail through
tonight across most terminals. Moderate and locally gusty onshore
flow will prevail through this evening then gradually ease
overnight.

Vicinity of ksfo... An early return of low clouds is expected this
evening. MVFR CIGS are forecast to return around 04z and persist
through the night. Clearing is anticipated around 18z-19z Tuesday
morning. West winds of around 15 kt with gusts 20-25 kt over ksfo
will gradually ease to under 10 kt overnight.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... MVFR CIGS will persist through the
night. Clearing is anticipated around 18z-20z Tuesday. West winds
of around 10 kt will gradually ease to under 5 kt overnight.

Marine As of 2:13 pm pdt Monday... Generally light to moderate
northwesterly winds will persist over the coastal waters through
mid-week as high pressure off the california coast weakens and a
surface low develops offshore of the pacific northwest. Locally
gusty winds are expected to develop late tonight along the big sur
coast south of point sur. Breezy winds are also forecast for
tomorrow afternoon and evening over the inner coastal waters from
pigeon point to point pinos, over the northern san francisco bay
around the golden gate and through the delta, and over the
monterey bay. Mixed seas will continue with shorter period
northwest waves at around 8 to 10 seconds, a light longer period
west swell, and a light southerly swell.

Mtr watches warnings advisories
Tngt Sca... Pt pinos to pt piedras blancas 0-10 nm from 3 am
public forecast: rowe
aviation: cw
marine: as
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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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Wind Forecast for San Francisco/Monterey Bay Area, CA (22,6,7,8)
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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.