Thursday, December13, 2018 L-36.com


Marine Weather and Tides
Bodega Bay, 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 4:52PM Thursday December 13, 2018 12:19 AM PST (08:19 UTC) Moonrise 11:52AMMoonset 10:51PM Illumination 32% 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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PZZ540 Coastal Waters From Point Arena To Point Reyes California Out To 10 Nm- 810 Pm Pst Wed Dec 12 2018
.small craft advisory in effect through late Friday night...
Tonight..N winds 5 to 15 kt. Wind waves 2 ft or less. NW swell 10 to 13 ft at 15 seconds.
Thu..SE winds 5 to 10 kt. Wind waves 2 ft or less. NW swell 10 to 13 ft at 16 seconds.
Thu night..SE winds 15 to 25 kt with gusts up to 35 kt. Wind waves 3 to 5 ft. NW swell 9 to 11 ft at 16 seconds.
Fri..S winds 15 to 25 kt with gusts up to 30 kt. Wind waves 3 to 5 ft. NW swell 8 to 12 ft at 16 seconds. Rain.
Fri night..N winds 5 to 15 kt. Wind waves 2 ft or less. W swell 12 to 15 ft at 16 seconds. A chance of showers.
Sat..SE winds 5 to 15 kt. Wind waves 2 ft or less. NW swell 9 to 13 ft.
Sat night..SE winds 10 to 20 kt. Wind waves 2 ft or less. W swell 6 to 9 ft. A chance of showers.
Sun..S winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 13 to 18 ft. Rain.
Mon..S winds up to 10 kt. Wind waves 2 ft or less. W swell 14 to 19 ft. A chance of showers.
PZZ500 810 Pm Pst Wed Dec 12 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Northerly winds will gradually diminish across the waters tonight before turning southerly late Thursday night ahead of the next storm system set to arrive on Friday. Northwest swell will increase across the waters into tomorrow creating hazardous conditions, particularly for smaller vessels. A more significant long period northwest swell is then expected to arrive late Sunday into Monday. SWells across open water could reach or even exceed 20 feet.


7 Day Forecast for Marine Location Near Bodega Bay, CA
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location: 38.31, -123.07     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 130546
afdmtr
area forecast discussion
national weather service san francisco bay area
946 pm pst Wed dec 12 2018

Synopsis Dry conditions are forecast to continue across our
region through Thursday night. Daytime temperatures will be mild
while nights will be seasonably cool. Patchy fog could redevelop
tonight across the area, especially in the valleys. A weak
weather system will likely produce light rain later Friday and
Friday night, especially for areas north of the golden gate.

Periods of light rain may continue into Saturday, mainly for the
north bay. A stronger and wetter system is then expected to
produce widespread rain across our entire region Sunday afternoon
and Sunday night.

Discussion As of 9:45 pm pst Wednesday... No short term updates
tonight. Some thin high clouds are spilling over the ridge which
may be just enough cloud coverage to keep widespread valley fog
formation in check. Current forecast has late night fog confined
to the north and east bay valleys and will leave that as is for
now. So far only half moon bay is reporting some low clouds at 300
feet. Highs today were in the 60s regionwide and expect similar
conditions for Thursday as high pressure noses over the region.

Next cold front approaches the north bay by Friday afternoon. Some
stray coastal clouds showers sprinkles could develop for the santa
cruz mtns and big sur hills as moist onshore flow returns Friday
afternoon but the best chance of light ran will be pt reyes
northward. Model runs have been consistent in weakening this
feature as it tries to push southward Friday night with little or
no rain south of the golden gate.

Remnant moisture stalled boundary will hang up over the north bay
on Saturday where some lingering stray showers will be possible
while the rest of the area will remain dry and seasonably mild.

Clouds will increase Sunday ahead of the next organized trough
and surface front. Expect steady rain in the north bay by Sunday
afternoon and then overspreading the rest of the bay area Sunday
night with the main front and rains out of the region by Monday
morning. A large NW swell will reach the waters behind this front
with high surf advisories likely becoming necessary.

Gfs offers drying trend behind the Monday front with the euro
showing some warm advection rains for the north bay. New euro will
be in shortly but right now would lead towards drier pattern for
next week when looking over ensembles with 500 mb anti-cyclonic
flow.

Prev discussion As of 3:00 pm pst Wednesday... A low amplitude
upper ridge just off the coast will keep the storm track to our
north through Friday. Occasional high clouds continue to stream
from the northwest into the region this afternoon. The stratus and
localized fog this morning dissipated from all areas by early
afternoon, allowing temperatures to rise into the upper 50s to
lower 60s. The upper ridge axis will move overhead by Thursday
morning, with continued mostly clear skies and light winds. This
will allow strong radiational cooling to commence overnight, with
lows expected to drop into the 30s in the inland valleys and 40s
near the coast and sf bay. Patchy fog will again be possible,
especially near the sf bay and and the north and east bay valleys.

As the ridge axis moves overhead on Thursday, temperatures will be
mild once again. Highs will warm several degrees into the mid to
upper 60s in the lower elevations in our southern areas, and low
to mid 60s north. Skies will be mostly sunny creating a nice day
for the area.

The next system will arrive on Friday as a trough approaches from
the west. A narrow band of high precipitable water will accompany
the trough and move into the bay area by Friday evening. As moist
southwest flow increases ahead of the trough, light rainfall is
expected to develop by early afternoon across the higher terrain
of the central coast in the warm sector. The main band of rainfall
will accompany a cold front which will push into the bay area
from northwest to southeast Friday late afternoon through
evening. The front will weaken and stall, likely not making it south
of santa cruz. Rainfall amounts with this system will be light,
with up to a quarter inch from the bay area north in the populated
areas and lesser amounts to the south.

Scattered showers will be possible on Saturday where the stalled
frontal band and high pwat set up. Rainfall amounts with the
scattered showers will be light and no impacts are expected on
Saturday. A stronger storm system will then arrive on Sunday as a
deeper trough moves into the area. The euro keeps the trough more
consolidated as it moves through, while the GFS brings a deeper
trough through, forming into a closed low by early Monday. Light
prefrontal precipitation will develop on Sunday morning north of
the golden gate. Heavier precipitation will move into the north
bay on Sunday afternoon and spread south through Sunday night
across the area. The euro is about 6 hours faster on the timing of
the precipitation and heavier than the gfs. Have leaned more on
the euro for the time being. Rainfall amounts will be heavier with
this system, with widespread 0.5 to 1 inch in most populated
areas, 1 to 1.5 inches in the north bay valleys, santa cruz
mountains, and santa lucia mountains, and 1.5 to 2.5 inches in the
north bay mountains. Additionally, breezy to locally gusty winds
will develop ahead of the front near the coast and in the higher
terrain on Sunday.

Model differences increase on Monday and Tuesday. A ridge is
likely to develop in the east pacific to our southwest, but the
strength remains uncertain with a disturbance moving over the top
of the ridge. The GFS builds a stronger ridge and pushes all
precipitation well to our north, while the euro keeps the ridge
much flatter and allows precipitation to make it as far south as
the sf bay. For now, have gone with a model blend and have kept
slight chances of showers across the north. Models do agree that
the ridge will further amplify by Wednesday, bringing a return to
dry weather through the middle of next week.

Aviation As of 09:25 pm pst Wednesday... For 06z tafs.VFR
through the period aside from possible patchy fog in the early
morning around the north bay. Valley fog may develop and move into
the east bay in the early morning reducing vis for the east bay
taf sites. Expect passing high clouds at around 20,000 feet to
continue through the period. Winds will remain generally light.

Vicinity of ksfo...VFR with high clouds and generally light winds.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR through the period with high clouds
and light winds.

Marine As of 09:27 pm pst Wednesday... Northerly winds will
gradually diminish across the waters tonight before turning
southerly late Thursday night ahead of the next storm system set
to arrive on Friday. Northwest swell will increase across the
waters into tomorrow creating hazardous conditions, particularly
for smaller vessels. A more significant long period northwest
swell is then expected to arrive late Sunday into Monday. Swells
across open water could reach or even exceed 20 feet.

Mtr watches warnings advisories
Tngt Sca... Pt arena to pt reyes 0-10 nm
sca... Pt reyes to pigeon pt 0-10 nm
sca... Pigeon pt to pt pinos 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
public forecast: rww
aviation: as
marine: as
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 14 mi39 min NNW 14 G 18 57°F1025.1 hPa
PRYC1 - 9415020 - Point Reyes, CA 22 mi49 min 55°F1025.6 hPa
46214 - Point Reyes, CA (029) 33 mi49 min 58°F14 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 40 mi39 min N 7.8 G 9.7 55°F 57°F1025.8 hPa
46237 - San Francisco Bar, CA (142) 43 mi49 min 56°F8 ft
RCMC1 - 9414863 - Richmond, CA 44 mi49 min 55°F
TIBC1 - Tiburon Pier, San Francisco Bay, CA 44 mi50 min W 1.9 50°F 1026 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 46 mi49 min SW 1 G 1.9 50°F 1025.7 hPa
FTPC1 - 9414290 - San Francisco, CA 47 mi55 min SW 1 G 1 51°F 55°F1025.9 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 47 mi49 min ESE 1.9 G 2.9 54°F 1026 hPa

Wind History for Point Reyes, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Santa Rosa, Santa Rosa Sonoma County Airport, CA20 mi26 minN 08.00 miFair40°F39°F97%1024.5 hPa

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Last 24hrCalmCalmCalmW3CalmCalmCalmSW4CalmNW4NW6NW4NW6NW5W9W6SW5CalmCalmCalmCalmCalmCalmCalm
1 day agoCalmCalmCalmCalmW3W3CalmCalmCalmCalm3NW5CalmS4S4S5SE5CalmCalmW3NW5CalmCalmCalm
2 days agoCalmCalmNW3CalmCalmCalmCalmCalmCalmCalmCalm3W34S4S4S4CalmNW3NW3CalmCalmCalmCalm

Tide / Current Tables for Bodega Harbor entrance, California
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Bodega Harbor entrance
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Thu -- 03:53 AM PST     4.57 feet High Tide
Thu -- 07:20 AM PST     Sunrise
Thu -- 09:33 AM PST     3.29 feet Low Tide
Thu -- 11:51 AM PST     Moonrise
Thu -- 02:17 PM PST     4.38 feet High Tide
Thu -- 04:52 PM PST     Sunset
Thu -- 09:25 PM PST     0.65 feet Low Tide
Thu -- 10:50 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.33.23.94.44.64.44.13.83.53.33.33.53.84.24.44.33.93.32.41.610.70.71.1

Tide / Current Tables for Point Reyes, California Current
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Point Reyes
Click for Map
Thu -- 01:23 AM PST     0.86 knots Max Flood
Thu -- 04:55 AM PST     -0.00 knots Slack
Thu -- 07:06 AM PST     -0.58 knots Max Ebb
Thu -- 07:19 AM PST     Sunrise
Thu -- 10:52 AM PST     0.00 knots Slack
Thu -- 11:51 AM PST     Moonrise
Thu -- 01:15 PM PST     0.44 knots Max Flood
Thu -- 03:52 PM PST     -0.00 knots Slack
Thu -- 04:53 PM PST     Sunset
Thu -- 07:09 PM PST     -0.99 knots Max Ebb
Thu -- 10:51 PM PST     Moonset
Thu -- 11:04 PM PST     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.70.80.80.70.4-0-0.4-0.6-0.5-0.4-0.200.30.40.40.2-0-0.4-0.8-1-0.9-0.6-0.4-0

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 (3,6,7,8)
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Ground Weather Radar Station Sacramento, 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.