Sunday, March26, 2017 L-36.com


Marine Weather and Tides
Moss Beach, CA

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 7:00AMSunset 7:29PM Sunday March 26, 2017 2:11 AM PDT (09:11 UTC) Moonrise 5:24AMMoonset 5:11PM Illumination 2% Phase: Waning Crescent; Moon at 28 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 Point Reyes To Pigeon Point To 10 Nm- 835 Pm Pdt Sat Mar 25 2017
Tonight..NW winds 5 to 15 kt. Wind waves 3 ft late in the evening...becoming 2 ft or less. W swell 7 to 9 ft at 14 seconds and south 3 ft at 15 seconds.
Sun..SW winds 10 kt...becoming south 10 to 20 kt in the afternoon. Wind waves 2 ft or less...becoming 3 to 4 ft in the afternoon. W swell 5 to 7 ft at 13 seconds and south 3 ft at 15 seconds. Slight chance of rain in the morning, then chance of rain in the afternoon.
Sun night..SW winds 15 to 25 kt...becoming west 5 to 15 kt after midnight. Wind waves 3 to 5 ft. W swell 5 to 7 ft at 12 seconds and southwest 3 ft at 16 seconds. Rain likely in the evening, then showers likely after midnight.
Mon..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 6 to 8 ft at 12 seconds and southwest 3 ft at 16 seconds. Slight chance of showers in the morning.
Mon night..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 8 to 10 ft at 11 seconds and south 3 ft at 15 seconds.
Tue..NW winds 20 to 30 kt. Wind waves 3 to 5 ft. W swell 8 to 10 ft and south 3 ft.
Wed..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 9 to 11 ft.
Thu..NW winds 20 to 30 kt. Wind waves 4 to 6 ft. W swell 9 to 12 ft.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...combined seas 6 to 8 ft with a dominant swell period of 15 seconds. Across the bar...combined seas 6 to 8 feet with a period of 15 seconds. Maximum ebb current of 1.1 knots at 02:42 am Sunday and 1.6 knots at 02:30 pm Sunday.
PZZ500 835 Pm Pdt Sat Mar 25 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Generally light winds and moderate seas across the waters through tonight. Gusty winds along the inner waters south of pt sur will diminish through tonight. On Sunday, winds over the waters will increase and turn southerly as a weak cold front approaches.

7 Day Forecast for Marine Location Near Moss Beach CDP, 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 260542
afdmtr
area forecast discussion
national weather service san francisco bay area
1042 pm pdt Sat mar 25 2017

Synopsis Partly cloudy and dry through midday Sunday. The next
weak cold front moves into the north bay Sunday afternoon with
light rain spreading southward through the remainder of the bay
area and central coast Sunday evening before ending by sunrise
Monday morning. Cool and breezy Monday afternoon, then high
pressure builds with a warming and drying trend through midweek.

Likely cooler again later in the week with breezy conditions.

Discussion As of 8:55 pm pdt Saturday... Saturday was a dry day
in between weather systems. Afternoon highs were mostly in the
lower to mid 60s and generally a degree or two cooler than normal.

Evening satellite imagery shows a storm system offshore to the
west of the pacific northwest and far northern california. This
system currently has a pretty good moisture tap with precipitable
water values up near 1.5 inches. The models agree that most of
the moisture and energy with this system will move inland to our
north on Sunday. However, a shortwave trough currently seen on
water vapor satellite imagery out near 45n/155w is forecast to
track to the ese and drive the tail end of a cold front through
our area Sunday afternoon and evening. There is generally good
model agreement both in terms of precipitation timing and
rainfall amounts with this system. Rain is expected to begin
pushing into northwest sonoma county by midday Sunday and then
across the rest of the north bay during the afternoon hours. Rain
will then spread across the rest of the sf bay area and monterey
bay area late Sunday afternoon and evening. Rainfall amounts are
forecast to range form 0.10 to 0.50" in the north bay, with
amounts of less than a tenth of an inch expected for areas south
and east of the golden gate.

Showers will taper off Sunday night with only a few showers
possibly lingering into Monday morning. Otherwise, Monday is
forecast to be a dry day, with brisk northwest winds expected
during the afternoon and evening, particularly near the coast.

Tuesday and Wednesday are forecast to be dry with a warming trend
as an upper level ridge builds over california. By Wednesday high
temperatures are expected to be mostly in the upper 60s and 70s.

Both the GFS and ECMWF are indicating that an inside slider will
sweep across northeast california late Wednesday night and
Thursday. The 18z gfs, and most 12z GFS ensemble members, track
this system too far to our north and east to generate
precipitation in our area. But the 12z ECMWF has a more westerly
trajectory and develops light rain across northern and eastern
portions of our area on Thursday. Both model solutions would
result in cooler and blustery conditions by late Thursday with
locally strong north to northwest winds.

Aviation As of 10:42 pm pdt Saturday... A few locations along
the immediate coastline are reporting MVFR CIGS this evening
otherwise it'sVFR. Winds remain onshore through tonight the
pressure gradient then becoming near neutral sfo-sac on Sunday.

Light rain with the next weather system reaches the north bay
beginning late Sunday morning, light rain spreads southeast over
the remainder of the area through Sunday afternoon and evening.

Vicinity of ksfo...VFR. Tempo MVFR cig 11z-15z Sunday. Light rain is
predicted to begin early Sunday evening.

Sfo bridge approach... Same as ksfo.

Monterey bay terminals...VFR. Onshore winds becoming light and variable
late tonight then southerly on Sunday. Light rain likely beginning
mid-late Sunday evening.

Marine As of 10:24 pm pdt Saturday... Generally light winds and
moderate seas across the waters through tonight. Gusty winds along
the inner waters south of point sur will diminish through tonight.

On Sunday, winds over the waters will increase and turn southerly
as a weak cold front approaches.

Mtr watches/warnings/advisories
Tngt Sca... Pt pinos to pt piedras blancas 0-10 nm until 2 am
public forecast: dykema
aviation: canepa
marine: anna/canepa
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 18 mi41 min S 1.9 G 2.9 51°F 60°F1019.7 hPa
46237 - San Francisco Bar, CA (142) 19 mi41 min 55°F10 ft
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 20 mi81 min WNW 7.8 G 12 54°F 56°F10 ft1019.9 hPa (-0.8)
FTPC1 - 9414290 - San Francisco, CA 21 mi41 min W 5.1 G 6 53°F 56°F1020.1 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 22 mi81 min WNW 12 G 14 54°F 56°F9 ft1019.9 hPa (-0.9)
PXSC1 22 mi41 min 53°F 48°F
OBXC1 23 mi41 min 54°F 49°F
AAMC1 - 9414750 - Alameda, CA 23 mi41 min W 5.1 G 8 53°F 59°F1020.3 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 24 mi41 min WSW 5.1 G 9.9 53°F 1019.8 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 24 mi41 min WSW 9.9 G 13
LNDC1 25 mi41 min WNW 4.1 G 6 54°F 1019.8 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 29 mi41 min N 2.9 G 4.1 54°F 1020 hPa
RCMC1 - 9414863 - Richmond, CA 30 mi41 min WNW 5.1 G 9.9 53°F 57°F1019.5 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 41 mi41 min WNW 9.9 G 12 53°F 1019.3 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 43 mi41 min SW 5.1 G 6 51°F 58°F1019.8 hPa49°F
UPBC1 43 mi41 min SW 8 G 9.9
PCOC1 - 9415144 - Port Chicago, CA 47 mi41 min SSW 4.1 G 7 50°F 57°F1019.2 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 mi16 minN 010.00 miMostly Cloudy48°F46°F94%1020.3 hPa
San Francisco, San Francisco International Airport, CA13 mi75 minW 610.00 miA Few Clouds53°F46°F77%1020 hPa
San Carlos Airport, CA16 mi16 minSW 310.00 miFair52°F46°F82%1020.3 hPa
Oakland, Metro Oakland International Airport, CA22 mi18 minW 610.00 miOvercast55°F48°F80%1020 hPa

Wind History from SFO (wind in knots)
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Last 24hrNW8W5NW6NE4N7CalmNE3N3N5W11W10W8W10W13W15W18W18W18W15W14W11W7W63
1 day agoSE4SE4SE6SE10SE13SE12SE14SE14SE12SE14SE9NE5E3E8NE4NE3W3W5NW4NW3CalmCalmW4W5
2 days agoW13
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W10W10W11W11W12SW11SW7SW5SE5S6SE74S8SE8

Tide / Current Tables for Princeton, Half Moon Bay, California
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Princeton
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Sun -- 04:05 AM PDT     1.36 feet Low Tide
Sun -- 06:23 AM PDT     Moonrise
Sun -- 07:03 AM PDT     Sunrise
Sun -- 10:04 AM PDT     5.38 feet High Tide
Sun -- 04:24 PM PDT     0.03 feet Low Tide
Sun -- 06:10 PM PDT     Moonset
Sun -- 07:27 PM PDT     Sunset
Sun -- 10:51 PM PDT     5.18 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.23.32.41.61.41.62.33.24.255.45.14.331.70.60.10.10.81.834.14.95.2

Tide / Current Tables for Sierra Point 1.3 mi ENE, South San Francisco Bay, California Current
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Sierra Point 1.3 mi ENE
Click for Map
Sun -- 12:17 AM PDT     -0.00 knots Slack
Sun -- 03:09 AM PDT     -1.08 knots Max Ebb
Sun -- 06:06 AM PDT     0.00 knots Slack
Sun -- 06:22 AM PDT     Moonrise
Sun -- 07:03 AM PDT     Sunrise
Sun -- 09:08 AM PDT     1.05 knots Max Flood
Sun -- 12:13 PM PDT     -0.01 knots Slack
Sun -- 03:25 PM PDT     -1.38 knots Max Ebb
Sun -- 06:10 PM PDT     Moonset
Sun -- 06:33 PM PDT     0.00 knots Slack
Sun -- 07:27 PM PDT     Sunset
Sun -- 09:38 PM PDT     1.18 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.2-0.4-0.9-1.1-1-0.6-0.10.40.9110.60.1-0.5-1-1.4-1.3-0.9-0.40.30.81.11.20.9

Weather Map and Satellite Images
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Weather Map
wmap_P
IR Satellite Image from GEOS
west_satellite

GOES Local Image of CentralWestCoast    EDIT
Geos

Wind Forecast for San Francisco/Monterey Bay Area, CA (5,6,7,8)
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Ground Weather Radar Station San Francisco Bay Area, CA
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weather_mapweather_map weather_map

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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.