Monday, October15, 2018 L-36.com


Marine Weather and Tides
Bolinas, 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 7:17AMSunset 6:33PM Monday October 15, 2018 4:08 PM PDT (23:08 UTC) Moonrise 12:40PMMoonset 10:40PM Illumination 39% Phase: Waxing Crescent; Moon at 6 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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PZZ545 Coastal Waters From Point Reyes To Pigeon Point California Out To 10 Nm- 240 Pm Pdt Mon Oct 15 2018
Tonight..NW winds 5 to 15 kt...becoming W after midnight. Wind waves 2 ft or less. W swell 2 to 3 ft at 11 seconds. SWell sw around 3 ft at 16 seconds.
Tue..W winds up to 10 kt. Wind waves 2 ft or less. W swell 1 to 3 ft at 12 seconds and sw around 3 ft at 18 seconds.
Tue night..NW winds up to 10 kt. Wind waves 2 ft or less. W swell 1 to 2 ft at 19 seconds and sw around 3 ft at 17 seconds.
Wed..NW winds up to 10 kt. Wind waves 2 ft or less. W swell 1 to 3 ft at 21 seconds and sw around 3 ft at 17 seconds.
Wed night..W winds up to 10 kt. Wind waves 2 ft or less. W swell 3 to 6 ft at 18 seconds and sw up to 3 ft at 17 seconds.
Thu..NW winds up to 10 kt. Wind waves 2 ft or less. W swell 4 to 6 ft and sw up to 3 ft.
Thu night..NW winds 5 to 10 kt. Wind waves 2 ft or less. W swell 4 to 6 ft and sw around 3 ft.
Fri..NW winds up to 10 kt. Wind waves 2 ft or less. W swell 3 to 6 ft and sw around 3 ft.
Sat..NW winds up to 10 kt. Wind waves 2 ft or less. W swell 2 to 5 ft.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...combined seas 3 to 4 ft with a dominant period of 17 seconds. Across the bar...combined seas 4 to 6 ft with a dominant period of 17 seconds. Maximum ebb current of 2 knots at 08:07 pm Monday and 1.1 knots at 10:25 am Tuesday.
PZZ500 240 Pm Pdt Mon Oct 15 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Light to moderate northerly winds will prevail over the coastal waters. Mixed swell will continue with a long period southerly swell through mid week and a more moderate period northwest swell. A longer period northwest swell will arrive during the second half of the week.


7 Day Forecast for Marine Location Near Bolinas, CA
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location: 37.67, -123.15     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 152103
afdmtr
area forecast discussion
national weather service san francisco bay area
203 pm pdt Mon oct 15 2018

Synopsis Light offshore winds are forecast to persist through
midweek with temperatures near or above seasonal averages. Onshore
winds increase a bit late in the week which will help moisten
conditions while temperatures remain seasonably mild.

Discussion As of 01:57 pm pdt Monday... Dry weather conditions
persist over much of the region this afternoon as an offshore
pattern continues, especially in the higher elevations and over
the northern two-thirds of the forecast area. While critically dry
conditions are forecast to continue for most locations through at
least Tuesday, north to northeast winds have diminished to below
critical levels. The dry air mass aloft has also allowed for
mild warm temperatures this afternoon. These conditions are likely
to persist into Tuesday as well with temperatures near to above
seasonal averages. The one forecast challenge will be how much of
a marine layer is able to develop overnight, mainly over the
central coast, and if stratus and or fog forms. At this time,
expecting very limited coverage of any low clouds fog given the
dry air advecting over the entire region overnight.

The overall pattern will change little in the coming days with an
upper level ridge over the eastern pacific extending inland over the
pacific northwest while an upper level trough is stretched over the
desert southwest and far southern california. Thus, dry weather
conditions are likely to continue region-wide with mild warm daytime
temperatures and cool overnights. It's worth noting that the dry air
mass in place will result in chilly overnight temperatures through
midweek while the onshore flow late in the week will bring overnight
lows up a bit.

Medium to longer range forecast models indicate the blocking pattern
will break down early next week as a stronger mid upper level trough
approaches the pacific northwest coast. If this pattern holds true,
there would be a slight chance of light rain over northern
california with the potential for rainfall as far south as the north
bay.

Aviation As of 10:18 am pdt Monday... For 18z tafs.VFR at all
terminals... Due to offshore flow. Patchy clouds fog near monterey
bay have diminished as well. The threat for llws has diminished as
well with decreasing winds over the hills. For tonight, mainlyVFR
with a low confidence chance for clouds fog near mry and sns.

Vicinity of ksfo...VFR. E to SE this morning then switching to nw
to W in the afternoon.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR. Some patchy CIGS fog tonight.

Fire weather As of 01:57 pm pdt Monday... Wind speeds across the
region, even in the highest peaks of far eastern sonoma county and
napa county have fallen below 10 mph, even with wind gusts at or
below 15 mph. This was well forecast and so are the very dry
conditions that prevail. While the winds have diminished,
critically dry conditions prevail with many locations across the
interior at or below 10%. Wind speeds may increase a bit again
late this evening and overnight in the north bay mountains,
primarily in the highest peaks ridges. The dry air mass will
remain in place through mid week with poor overnight humidity
recoveries, especially in the hills above 1,000 feet.

Should see conditions moisten slightly late in the week as onshore
winds increase a bit. Overall, this should help limit fire weather
concerns region-wide. Will need to closely monitor these
conditions however as the ongoing dry, breezy windy conditions
have further dried fuels.

Marine As of 10:16 am pdt Monday... Breezy to occasionally gusty
offshore winds will continue to diminish through the morning
hours. Winds will be strongest through the golden gate and
immediately near coastal gaps. Mixed swell will continue with a
long period southerly swell through mid week and a more moderate
period northwest swell. A longer period northwest swell will
arrive during the second half of the week.

Mtr watches warnings advisories
Tngt None.

Public forecast: rgass
aviation: mm
marine: mm
fire weather: dykema
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 17 mi29 min NW 9.7 G 9.7 61°F 59°F1020.1 hPa
PRYC1 - 9415020 - Point Reyes, CA 24 mi39 min WNW 13 G 15 59°F1019.7 hPa
46214 - Point Reyes, CA (029) 26 mi39 min 62°F4 ft
46237 - San Francisco Bar, CA (142) 28 mi39 min 60°F3 ft
FTPC1 - 9414290 - San Francisco, CA 37 mi45 min WSW 12 G 17 70°F 62°F1019.4 hPa
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 40 mi29 min NW 7.8 G 9.7 58°F1020.1 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 40 mi46 min E 1 71°F 1019 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 41 mi39 min NNW 5.1 G 6 69°F 1018.2 hPa
PXSC1 41 mi45 min 69°F
RCMC1 - 9414863 - Richmond, CA 43 mi39 min 63°F
OBXC1 44 mi39 min 71°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 44 mi45 min W 2.9 G 4.1
OKXC1 - 9414776 - Oakland (Berth 34), CA 44 mi39 min NW 4.1 G 5.1 68°F 1019.1 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 45 mi39 min W 6 G 8 75°F 1019.5 hPa
AAMC1 - 9414750 - Alameda, CA 46 mi45 min WSW 2.9 G 2.9 72°F 64°F1019.3 hPa
LNDC1 47 mi39 min WSW 6 G 7 76°F 1019 hPa

Wind History for Point Reyes, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Francisco, San Francisco International Airport, CA42 mi73 minN 010.00 miFair79°F24°F13%1018.8 hPa

Wind History from SFO (wind in knots)
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Last 24hrW17W19W15W13W11W8S3W4S3NE13E9E12E8E15E10SE6SE8SE7SE10SE7SE5CalmCalmN4
1 day agoW17W16W15W11W9W10NW8W8W7SW3CalmW3S4S6S7S8SW73NE4NE4NE3NW8NW10NW12
2 days agoW16W17W17W14NW6NW7W7SW4CalmW4W4W5W7W5SW3W7NW4CalmN5N10W14W18NW16W20

Tide / Current Tables for Southeast Farallon Island, California
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Southeast Farallon Island
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Mon -- 05:29 AM PDT     4.12 feet High Tide
Mon -- 07:20 AM PDT     Sunrise
Mon -- 10:38 AM PDT     3.18 feet Low Tide
Mon -- 01:39 PM PDT     Moonrise
Mon -- 03:51 PM PDT     4.69 feet High Tide
Mon -- 06:34 PM PDT     Sunset
Mon -- 11:12 PM PDT     0.60 feet Low Tide
Mon -- 11:39 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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11.72.53.23.84.14.13.93.73.43.23.23.43.84.24.64.74.53.93.12.21.40.80.6

Tide / Current Tables for Point Reyes, California Current
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Point Reyes
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Mon -- 02:48 AM PDT     0.83 knots Max Flood
Mon -- 06:13 AM PDT     -0.00 knots Slack
Mon -- 07:20 AM PDT     Sunrise
Mon -- 08:17 AM PDT     -0.50 knots Max Ebb
Mon -- 12:00 PM PDT     0.00 knots Slack
Mon -- 01:40 PM PDT     Moonrise
Mon -- 02:29 PM PDT     0.46 knots Max Flood
Mon -- 05:13 PM PDT     -0.00 knots Slack
Mon -- 06:34 PM PDT     Sunset
Mon -- 08:28 PM PDT     -1.01 knots Max Ebb
Mon -- 11:38 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.10.50.80.80.70.50.1-0.3-0.5-0.5-0.3-0.2-00.30.40.40.30.1-0.3-0.7-1-1-0.8-0.6

Weather Map and Satellite Images
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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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Wind Forecast for San Francisco/Monterey Bay Area, CA (19,4,5,8)
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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.