Saturday, March23, 2019 L-36.com


Marine Weather and Tides
Moss Beach, 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 7:08AMSunset 7:24PM Friday March 22, 2019 9:21 PM PDT (04:21 UTC) Moonrise 8:36PMMoonset 7:31AM Illumination 95% Phase: Waning Gibbous; Moon at 17 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- 850 Pm Pdt Fri Mar 22 2019
.small craft advisory for rough bar in effect through Saturday evening...
.small craft advisory in effect through Saturday evening...
Tonight..S winds 10 to 20 kt with gusts up to 30 kt...becoming nw 5 to 15 kt after midnight. Wind waves 3 to 4 ft this evening... Becoming 2 ft or less. W swell 6 to 8 ft at 17 seconds...building to 8 to 11 ft at 17 seconds after midnight. SWell S around 1 ft. Rain likely, mainly this evening.
Sat..NW winds 10 to 15 kt with gusts up to 25 kt. Wind waves 2 ft or less. W swell 9 to 12 ft at 16 seconds and S 1 to 2 ft at 13 seconds.
Sat night..NW winds 5 to 15 kt. Wind waves 2 ft or less. W swell 9 to 12 ft at 16 seconds and S 1 to 2 ft at 13 seconds.
Sun..SE winds 5 to 15 kt. Wind waves 2 ft or less. W swell 7 to 10 ft at 15 seconds and S 1 to 2 ft at 18 seconds.
Sun night..S winds 20 to 30 kt with gusts up to 40 kt. Wind waves 6 to 8 ft. W swell 6 to 8 ft at 14 seconds and S 1 to 2 ft at 19 seconds. Rain likely.
Mon..W winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. W swell 7 to 9 ft at 14 seconds and S 1 to 2 ft at 18 seconds. Rain.
Mon night..W winds up to 10 kt. Wind waves 2 ft or less. W swell 6 to 8 ft at 13 seconds and S 1 to 2 ft at 18 seconds. A chance of showers.
Tue..S winds 5 to 15 kt. Wind waves 2 ft or less. W swell 5 to 8 ft and S 1 to 3 ft. Rain likely.
Wed..SW winds 10 to 20 kt. Wind waves 2 ft or less. W swell 6 to 9 ft and sw 1 to 2 ft. Rain likely.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...combined seas 6 to 9 ft with a dominant of 17 seconds. Across the bar...combined seas 7 to 11 ft with a dominant period of 17 seconds. Maximum ebb current of 3.7 kt at 06:43 am Saturday and 2.5 kt at 07:31 pm Saturday.
PZZ500 850 Pm Pdt Fri Mar 22 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... A frontal system will move through the area tonight. Light to moderate southerly winds will switch to west to northwest overnight. A moderate long-period northwest swell will impact the area through Saturday night. Winds will become southerly again on Sunday before increasing Sunday night as a frontal system approaches.


7 Day Forecast for Marine Location Near Moss Beach, CA
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location: 37.51, -122.56     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 230352
afdmtr
area forecast discussion
national weather service san francisco bay area
852 pm pdt Fri mar 22 2019

Synopsis A frontal boundary will move from northwest to
southeast across the region overnight, resulting in widespread
rainfall. Mainly dry conditions are expected over the weekend
with unsettled weather likely to return during at least the first
half of next week.

Discussion As of 8:50 pm pdt Friday... A frontal boundary has
been slowly moving through the north bay since this afternoon.

Rain totals in the north bay have varied considerably with this
system, ranging from about a quarter inch in the southern part of
napa county to nearly 2 inches in northwest sonoma county. San
francisco has picked up 0.32" of rain thus far and points south
and east of the city have only seen a quarter inch of less. Expect
rain totals to increase across the southern two thirds of our
area overnight as the main frontal band moves through.

Satellite shows that a wave developed along the frontal boundary
as it approached the coast this afternoon. Development of a wave
slowed the eastward progression of the front a bit, and also
enhanced it. The enhancement along the front will allow the
boundary to maintain its strength long enough to bring widespread
rain to areas south of the golden gate overnight. Based on the
latest hrrr, rain rates should begin to decrease in the north bay
by midnight as the boundary moves to the south. Rain rates will be
heaviest across the central and southern sf bay area from late
this evening through about 4 am, and in the monterey bay area
from about 2-6 am Saturday morning. Scattered showers are expected
to linger through mid morning Saturday, but primarily across the
far southern portion of our area. For the most part, expect partly
cloudy and dry conditions on Saturday with afternoon highs
ranging from the upper 50s to mid 60s. Dry weather will prevail
through Sunday as well, and slightly warmer temperatures are
expected on Sunday.

Models agree that an unsettled weather pattern will continue
through at least the first half of next week. An upper low in the
gulf of alaska is forecast to drop south offshore and a couple of
shortwave troughs rotating around the low will generate rainfall
as they swing across northern and central california. The first
impulse is expected to spread rain across our area late Sunday
night into Monday. Rainfall amounts will be heaviest across the
north bay with this system and taper off significantly to the
south, especially from monterey bay southward. The second impulse
is due to bring additional rainfall in the Tuesday night-
Wednesday time frame. Both of these precipitation events next week
have the potential to produce at least brief periods of heavy
rain, especially across the northern portion of our area. However,
these systems are forecast to move through relatively quickly
which will help mitigate any possible hydro impacts. Hydro impacts
will also be lessened by the fact that there is expected to be at
least 24 hours of dry conditions in between rain events.

Based on longer range models, drier weather is likely to develop
during the second half of next week. But the long range
deterministic and ensemble forecasts indicate a good chance that
periods of rain will continue into the early part of april.

Aviation As of 4:30 pm pdt Friday... Light rain spreading over
the sfo bay area. The rain will spread into the mry bay area
after 03z. Frontal system will be slow to move tonight so rain
should last through Saturday morning. Models indicate frontal band
moves out of the area after 15z with a few residual showers
through late morning. Rapid drying is indicated Saturday
afternoon. Strongest winds will occur early evening with maximum
speeds 10-15 kt out of the south to southeast.

Vicinity of ksfo... MVFR CIGS with light rain and reduced vsbys to
3-5 miles. Conditions improve toVFR after 12z. Southeast winds
10-15 kt becoming southerly tonight and westerly after 09z.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... CIGS lowering into the MVFR range after
03z with light rain. Onshore winds to 10 kt becoming southeast
later tonight.

Marine As of 8:50 pm pdt Friday... A frontal system will move
through the area tonight. Light to moderate southerly winds will
switch to west to northwest overnight. A moderate long-period
northwest swell will impact the area through Saturday night. Winds
will become southerly again on Sunday before increasing Sunday
night as a frontal system approaches.

Mtr watches warnings advisories
Tngt Sca... Pigeon pt to pt pinos 0-10 nm from 9 pm
sca... Pt pinos to pt piedras blancas 0-10 nm from 9 pm
sca... Pigeon pt to pt piedras blancas 10-60 nm from 9 pm
sca... Pt arena to pt reyes 0-10 nm
sca... Pt reyes to pigeon pt 0-10 nm
sca... Pt arena to pigeon pt 10-60 nm
sca... Rough bar advisory for sf bar
public forecast: dykema
aviation: W pi
marine: W pi
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 18 mi34 min SE 5.1 G 8.9 56°F 61°F1020.9 hPa
46237 - San Francisco Bar, CA (142) 19 mi52 min 55°F9 ft
FTPC1 - 9414290 - San Francisco, CA 21 mi40 min S 4.1 G 5.1 56°F 56°F1020.5 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 22 mi32 min S 16 G 21 55°F 55°F10 ft1020.3 hPa
PXSC1 22 mi40 min 58°F 56°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 22 mi34 min SE 12 G 13 56°F 1019.2 hPa
AAMC1 - 9414750 - Alameda, CA 23 mi40 min ESE 8.9 G 13 56°F 57°F1020.8 hPa
OBXC1 23 mi34 min 56°F 56°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 24 mi34 min SE 12 G 14
OKXC1 - 9414776 - Oakland (Berth 34), CA 24 mi34 min SE 8 G 12 55°F 1020.4 hPa
LNDC1 25 mi34 min SE 7 G 9.9 56°F 1020.4 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 27 mi95 min SE 12 55°F 1020 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 29 mi34 min SE 8.9 G 13 57°F 1020.7 hPa
RCMC1 - 9414863 - Richmond, CA 30 mi40 min SE 6 G 9.9 56°F 56°F1020.1 hPa
PRYC1 - 9415020 - Point Reyes, CA 40 mi34 min 55°F1019.1 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 41 mi34 min ESE 8 G 8.9 56°F 1020.2 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 43 mi34 min E 2.9 G 2.9
UPBC1 43 mi34 min ESE 5.1 G 6
PCOC1 - 9415144 - Port Chicago, CA 47 mi34 min E 5.1 G 8 54°F 56°F1020.9 hPa

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Half Moon Bay Airport, CA3 mi27 minSSE 13 G 184.00 miLight Rain55°F53°F94%1020.7 hPa
San Francisco, San Francisco International Airport, CA13 mi26 minSSE 6 G 1910.00 miMostly Cloudy56°F50°F81%1020.2 hPa
San Carlos Airport, CA16 mi35 minESE 810.00 miOvercast55°F51°F88%1020.7 hPa
Oakland, Metro Oakland International Airport, CA22 mi29 minSE 1010.00 miMostly Cloudy56°F52°F87%1020.6 hPa
Palo Alto Airport, CA23 mi35 minSE 1010.00 miOvercast55°F51°F88%1020.7 hPa

Wind History from HAF (wind in knots)
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Last 24hrCalmE4NE3CalmCalmCalmSE5SE4SE7SE8SE8SE5S10S10
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1 day agoNE3E4CalmNE3NE4CalmCalmCalmNE3CalmCalmCalmN4NW9W9W9NW10NW9NW10NW10NW6NW3NE4Calm
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Tide / Current Tables for Half Moon Bay, California
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Half Moon Bay
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Sat -- 12:49 AM PDT     5.80 feet High Tide
Sat -- 07:06 AM PDT     0.03 feet Low Tide
Sat -- 07:09 AM PDT     Sunrise
Sat -- 09:05 AM PDT     Moonset
Sat -- 01:25 PM PDT     5.00 feet High Tide
Sat -- 07:13 PM PDT     1.08 feet Low Tide
Sat -- 07:24 PM PDT     Sunset
Sat -- 10:43 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.65.85.34.32.81.40.400.31.12.23.44.44.94.94.33.42.31.51.11.3234.1

Tide / Current Tables for Oyster Point 2.8 mi E, South San Francisco Bay, California Current
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Oyster Point 2.8 mi E
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Sat -- 02:59 AM PDT     -0.00 knots Slack
Sat -- 06:23 AM PDT     -1.87 knots Max Ebb
Sat -- 07:08 AM PDT     Sunrise
Sat -- 09:04 AM PDT     Moonset
Sat -- 09:26 AM PDT     0.01 knots Slack
Sat -- 12:28 PM PDT     1.17 knots Max Flood
Sat -- 03:45 PM PDT     -0.00 knots Slack
Sat -- 06:49 PM PDT     -1.44 knots Max Ebb
Sat -- 07:23 PM PDT     Sunset
Sat -- 09:40 PM PDT     0.00 knots Slack
Sat -- 10:43 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.110.6-0-0.8-1.5-1.8-1.7-1.2-0.40.30.91.11.10.90.4-0.2-0.9-1.3-1.4-1.1-0.50.20.6

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 (0,6,7,8)
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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.