Monday, May27, 2019 L-36.com


Marine Weather and Tides
Montara, 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 5:51AMSunset 8:22PM Sunday May 26, 2019 10:25 PM PDT (05:25 UTC) Moonrise 1:00AMMoonset 11:54AM Illumination 43% Phase: Third Quarter Moon; Moon at 23 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- 844 Pm Pdt Sun May 26 2019
.small craft advisory for rough bar in effect until 9 pm pdt this evening...
.small craft advisory in effect until 9 pm pdt this evening...
.small craft advisory in effect from Monday afternoon through late Monday night...
Tonight..NW winds 15 to 20 kt...becoming 10 to 20 kt after midnight. Wind waves 4 to 5 ft this evening... Becoming 2 ft or less. NW swell 6 to 8 ft at 10 seconds.
Memorial day..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves around 3 ft. W swell 4 to 6 ft at 9 seconds.
Mon night..NW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 3 to 4 ft. NW swell 4 to 6 ft at 9 seconds.
Tue..NW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 4 to 5 ft. NW swell 4 to 6 ft at 8 seconds and sw around 3 ft at 18 seconds.
Tue night..NW winds 20 to 30 kt. Wind waves 4 to 5 ft. NW swell 5 to 7 ft at 9 seconds and sw around 3 ft at 18 seconds.
Wed..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. W swell 4 to 6 ft at 9 seconds and sw around 3 ft at 17 seconds.
Wed night..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. W swell 4 to 6 ft at 9 seconds and sw around 3 ft at 16 seconds.
Thu..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves around 3 ft. W swell 4 to 6 ft and sw around 3 ft.
Fri..NW winds 10 to 20 kt. Wind waves around 3 ft. W swell 3 to 5 ft and sw around 3 ft.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...combined seas 6 to 8 ft with a dominant period of 9 seconds. Across the bar...combined seas 8 to 11 ft with a dominant period of 9 seconds. Maximum ebb current of 1.3 kt at 12:25 am Monday and 1.3 kt at 12:07 pm Monday.
PZZ500 844 Pm Pdt Sun May 26 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Low pressure moving inland across california will bring breezy northwest winds through tonight. Winds will decrease on Monday morning before becoming breezy again Monday afternoon. Northwest winds will strengthen further and become breezy to gusty on Tuesday and Wednesday. Moderate northwest swell continues into the upcoming week with steep fresh seas generated by gusty winds.


7 Day Forecast for Marine Location Near Montara, CA
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location: 37.57, -122.58     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 270355
afdmtr
area forecast discussion
national weather service san francisco bay area
855 pm pdt Sun may 26 2019

Synopsis Scattered showers are possible through this evening,
mainly south of san francisco. Dry but cool conditions are
forecast for memorial day. A gradual warming trend is expected
over the next few days with temperatures expected to return to
near normal by midweek. Dry conditions are forecast for the
remainder of the week and into next weekend.

Discussion As of 8:55 pm pdt Sunday... An unseasonably cold
weather system produced scattered showers late last night and
today, with the most numerous showers occurring across southern
portions of of our forecast area. There was also an isolated
thunderstorm early this afternoon near gilroy in the southern
santa clara valley. A few locations in the hills of northern
monterey county picked up slightly more than a half inch of rain
over the past 24 hours, otherwise rainfall amounts were mostly
less than a quarter inch. The monterey climate station accumulated
0.22" of rain in the past 24 hours, boosting its monthly total to
2.77", which makes the current month the wettest may on record in
monterey. The previous record for may was 2.67" in 1998 (monterey
rainfall records go back to 1949).

Shower activity has been ending from north to south since early
afternoon as the upper low moves off to the southeast. Current
kmux radar shows only isolated showers across the southern half of
our area. Based on the 00z NAM and latest hrrr, a few showers may
linger across the southern portion of our area until late tonight,
but dry conditions will return to all areas by Monday morning.

Memorial day is forecast to be a dry and partly cloudy day with
highs mostly in the 60s to around 70. Tomorrow's temperatures will
be about 5 degrees warmer than today, but still well below normal.

The upper trough currently centered over california is forecast to
shift eastward over the next few days while an upper ridge over
the eastern pacific edges closer to the west coast. In between,
our area will be under dry northwesterly flow aloft with
gradually increasing heights. This will result in warming through
midweek. By Wednesday, temperatures are forecast to return to near
seasonal averages for the first time in several days.

Although dry weather is currently forecast through the week, a
couple of weak disturbances moving through the northwesterly flow
aloft could produce brief light precipitation in california at
times this week. Currently, precipitation potential looks to be
confined to areas to our east.

Longer range models indicate the upper ridge over the eastern
pacific will finally build eastward over california by next
weekend. Thus, we may see warmer than normal temperatures develop
next weekend, or early in the following week.

Aviation As of 05:03 pm pdt Sunday... Convective showers will
continue late this afternoon and evening as a cold upper low moves
through the area. A thunderstorm occurred near gilroy earlier
this afternoon but lightning has not been detected elsewhere so
far. Showers will bring wet runways and ceilings briefly lowering
to MVFR. Showers will gradually end from north to south this
evening, with generally dry conditions expected north of monterey
bay by 06z. Occasionally gusty onshore winds this afternoon will
decrease becoming 5-10 kt by late this evening. Residual moisture
will result in ceilings returning late this evening and overnight.

Expecting CIGS between 2000-3000 feet by sunrise Monday. Cigs
will persist through the morning with clearing expected by early
afternoon at most terminals.

Vicinity of ksfo... Showers on the decrease with coverage ending by
mid evening. Brief MVFR will be possible with any showers.

Isolated vcts will remain possible through early evening. Breezy
onshore winds will decrease this evening with 5-10 kt expected
overnight. CIGS of 2000-3000 feet expected to return overnight and
persist through late Monday morning.

Sfo bridge approach... Similar to ksfo except clouds below 4000 ft
in approach may impact visuals.

Monterey bay terminals... Showers will continue this evening with
brief MVFR during showers. Breezy onshore winds will decrease this
evening. A few showers may linger into the overnight hours before
ending by sunrise Monday. MVFR CIGS will return late this evening
and persist through Monday morning and possibly Monday afternoon.

Marine As of 8:44 pm pdt Sunday... Low pressure moving inland
across california will bring breezy northwest winds through
tonight. Winds will decrease on Monday morning before becoming
breezy again Monday afternoon. Northwest winds will strengthen
further and become breezy to gusty on Tuesday and Wednesday.

Moderate northwest swell continues into the upcoming week with
steep fresh seas generated by gusty winds.

Mtr watches warnings advisories
Tngt Sca... Pt arena to pt reyes 0-10 nm until 3 am
sca... Pigeon pt to pt pinos 0-10 nm until 3 am
sca... Pt pinos to pt piedras blancas 0-10 nm until 3 am
sca... Pt arena to pigeon pt 10-60 nm until 3 am
sca... Pigeon pt to pt piedras blancas 10-60 nm until 3 am
sca... Mry bay until 9 pm
sca... Pt reyes to pigeon pt 0-10 nm until 9 pm
sca... Rough bar advisory for sf bar until 9 pm
public forecast: dykema
aviation: st
marine: st
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46237 - San Francisco Bar, CA (142) 15 mi56 min 57°F5 ft
FTPC1 - 9414290 - San Francisco, CA 17 mi44 min W 5.1 G 8.9 53°F 58°F1015 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 19 mi36 min NW 14 G 18 53°F 54°F6 ft1015.5 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 19 mi44 min 53°F 1013.7 hPa
PXSC1 19 mi44 min 55°F 51°F
AAMC1 - 9414750 - Alameda, CA 20 mi44 min W 6 G 8 54°F 62°F1015.2 hPa
RTYC1 - 9414523 - Redwood City, CA 20 mi38 min WSW 6 G 8 54°F 66°F1015.6 hPa
OBXC1 21 mi38 min 55°F 51°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 21 mi38 min W 8 G 9.9 54°F 1014.8 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 21 mi44 min W 8.9 G 9.9
LNDC1 22 mi38 min W 4.1 G 6 55°F 1014.8 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 23 mi105 min SSW 4.1 52°F 1014 hPa
RCMC1 - 9414863 - Richmond, CA 26 mi44 min WNW 8 G 11 54°F 60°F1014.5 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 26 mi44 min W 4.1 G 7 55°F 1015 hPa
PRYC1 - 9415020 - Point Reyes, CA 36 mi44 min 53°F1014.7 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 38 mi44 min WSW 7 G 9.9 56°F 1014.4 hPa
UPBC1 40 mi38 min W 8 G 12
MZXC1 - 9415102 - Martinez-Amorco CA 40 mi44 min WSW 8 G 9.9 54°F 62°F1014.7 hPa54°F
PCOC1 - 9415144 - Port Chicago, CA 44 mi44 min SW 5.1 G 7 53°F 62°F1014.7 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 49 mi44 min W 5.1 G 11 55°F 1014.3 hPa

Wind History for San Francisco, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Half Moon Bay Airport, CA6 mi31 minNW 810.00 miOvercast54°F48°F82%1015.6 hPa
San Francisco, San Francisco International Airport, CA12 mi30 minW 810.00 miMostly Cloudy52°F46°F83%1015 hPa
San Carlos Airport, CA18 mi99 minW 55.00 miLight Rain54°F50°F88%1014.9 hPa
Oakland, Metro Oakland International Airport, CA21 mi33 minW 810.00 miMostly Cloudy55°F46°F74%1015 hPa

Wind History from SFO (wind in knots)
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2 days agoSW6S9SW5SW5SW7S8SW6SW6SW6S6CalmCalmCalmNW8W17W11
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G22
W12SW9W14

Tide / Current Tables for Half Moon Bay, California
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Half Moon Bay
Click for Map
Mon -- 12:43 AM PDT     2.43 feet Low Tide
Mon -- 02:29 AM PDT     Moonrise
Mon -- 05:29 AM PDT     3.62 feet High Tide
Mon -- 05:52 AM PDT     Sunrise
Mon -- 12:11 PM PDT     0.70 feet Low Tide
Mon -- 01:50 PM PDT     Moonset
Mon -- 07:14 PM PDT     4.59 feet High Tide
Mon -- 08:21 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.52.42.633.33.63.63.32.82.11.40.90.70.81.32.12.93.74.34.64.54.13.52.9

Tide / Current Tables for South Channel, San Francisco Bay Approach, California Current
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South Channel
Click for Map
Mon -- 02:11 AM PDT     0.00 knots Slack
Mon -- 02:30 AM PDT     Moonrise
Mon -- 04:42 AM PDT     0.54 knots Max Flood
Mon -- 05:52 AM PDT     Sunrise
Mon -- 07:39 AM PDT     -0.00 knots Slack
Mon -- 10:26 AM PDT     -1.05 knots Max Ebb
Mon -- 01:50 PM PDT     Moonset
Mon -- 02:09 PM PDT     0.00 knots Slack
Mon -- 05:24 PM PDT     1.03 knots Max Flood
Mon -- 08:22 PM PDT     Sunset
Mon -- 08:51 PM PDT     -0.00 knots Slack
Mon -- 11:26 PM PDT     -0.91 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.6-0.4-0.10.30.50.50.50.2-0.2-0.7-1-1-0.8-0.5-0.10.40.8110.80.5-0.1-0.6-0.9

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 (1,6,7,8)
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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.