Saturday, April29, 2017 L-36.com


Marine Weather and Tides
Montara, 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 6:13AMSunset 8:00PM Saturday April 29, 2017 4:16 AM PDT (11:16 UTC) Moonrise 8:14AMMoonset 10:51PM Illumination 12% Phase: Waxing Crescent; Moon at 3 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- 250 Am Pdt Sat Apr 29 2017
.small craft advisory in effect from this afternoon through late Sunday night...
Today..NW winds 10 to 20 kt. Wind waves 2 to 4 ft. NW swell 5 to 7 ft at 11 seconds.
Tonight..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 6 to 8 ft at 10 seconds.
Sun..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 7 to 9 ft at 9 seconds.
Sun night..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 7 to 9 ft at 9 seconds.
Mon..NW winds 20 to 30 kt. Wind waves 4 to 6 ft. NW swell 7 to 9 ft at 9 seconds.
Tue..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 8 to 10 ft.
Wed..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 6 to 8 ft. SWell southwest 3 ft.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...combined seas 6 to 8 ft at 9 seconds decreasing to 5 to 7 ft at 8 seconds Saturday. Across the bar...combined seas 6 to 9 feet at 9 seconds. Maximum ebb current of 2 knots at 05:30 am Saturday and 1 knots at 06:30 pm Saturday.
PZZ500 250 Am Pdt Sat Apr 29 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Strong, gusty northwest winds will persist through the weekend as high pressure remains offshore. The strongest gusts may occasionally be gale force, especially later this afternoon and evening. The strong winds will also drive hazardous seas in the form of steep fresh swell with short periods.

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 291009
afdmtr
area forecast discussion
national weather service san francisco bay area
309 am pdt Sat apr 29 2017

Synopsis Seasonably warm weekend in store for the bay area and
central coast. Another round of offshore winds Monday and Tuesday
will drive temperatures even warmer early next week with daytime
highs into the 80s with some lower 90s for the warmest interior
valleys. Cooling trend back to normal by Thursday and Friday as
the next trough arrives.

Discussion As of 3:09 am pdt Saturday... Skies are clear early
this morning with a still strong 6.5 mb northerly gradient down
the coast from arcata to sfo. Gusty northeast winds are still
showing up across the area hills with gusts currently in the 25-30
mph range. These offshore winds will ease by mid morning as the
radiative inversions mix out. This will set the stage for an ideal
bay area Saturday with highs well into the 70s and some lower 80s
away from the coast. Even the beaches will stay sunny with 70s
found just a few miles inland.

Given the dry airmass temperatures will cool into the 40s and
lower 50s tonight with lighter winds aloft allowing for better
radiative cooling.

Sunday looks like a near repeat of Saturday with sunny and
seasonably warm temperatures in place.

A shortwave diving into the great basin late Sunday night into
Monday morning will increase surface pressure gradients once
again. This will initiate another round of offshore winds for the
hills early Monday morning and then again Tuesday morning. 850 mb
temps around 12 celsius this morning will warm to 15-16 celsius by
Monday morning with these offshore winds in place. Thus expect
noted warming early next week with 850 mb temps forecast to reach
17-18 celsius by weds. These type of temps aloft with light
offshore flow and a thermal trough along the coast should
translate into some of the warmest weather so far this spring with
daytime highs well into the 80s and even some lower 90s for the
warmest inland valleys.

Cooling trend should begin in earnest by Thursday, at least near
the coast with widespread inland cooling back to near or even
below normal by next Friday as the next (mainly dry) trough
arrives along the northern california coast. In the meantime
after a long and wet winter the next week looks to bring some
ideal spring time weather to not only the bay area but much of the
state.

Aviation As of 10:35 pm pdt Friday... For 06z tafs.VFR through
the forecast period. West to northwest winds will veer more to
the north and decrease overnight. Winds on Saturday afternoon will
not be as strong as on Friday afternoon.

Vicinity of ksfo...VFR with mostly clear skies through the
forecast period. W-nw winds gradually diminishing overnight and
veering to the north. Winds will then shift back to the west on
Saturday afternoon and increase, but will not be as strong as
Friday afternoon.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR. Light and variable winds, becoming
light to moderate westerly winds on Saturday afternoon.

Marine As of 02:51 am pdt Saturday... Strong, gusty northwest
winds will persist through the weekend as high pressure remains
offshore. The strongest gusts may occasionally be gale force,
especially later this afternoon and evening. The strong winds will
also drive hazardous seas in the form of steep fresh swell with
short periods.

Mtr watches/warnings/advisories
Tday 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... Pt arena to pt reyes 0-10 nm from 9 am
sca... Pt reyes to pigeon pt 0-10 nm from 3 pm
sca... Mry bay until 3 am
sca... Mry bay from 3 pm
public forecast: rww
aviation: drp
marine: drp
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46237 - San Francisco Bar, CA (142) 15 mi77 min 53°F5 ft
FTPC1 - 9414290 - San Francisco, CA 17 mi59 min S 1.9 G 4.1 59°F 53°F1018.3 hPa
PXSC1 19 mi59 min 60°F 49°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 19 mi59 min N 8 G 8.9 59°F 1017 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 19 mi87 min NW 18 G 19 51°F 50°F7 ft1017.9 hPa (+0.3)
RTYC1 - 9414523 - Redwood City, CA 20 mi59 min SW 5.1 G 8 61°F 63°F1017.4 hPa
AAMC1 - 9414750 - Alameda, CA 20 mi59 min NNW 9.9 G 14 62°F 62°F1018.2 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 21 mi59 min N 12 G 15
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 21 mi87 min NW 18 G 21 53°F 53°F9 ft1017.4 hPa (+0.3)
OKXC1 - 9414776 - Oakland (Berth 34), CA 21 mi59 min N 14 G 16 61°F 1017.9 hPa
OBXC1 21 mi59 min 61°F 45°F
LNDC1 22 mi65 min N 7 G 9.9 62°F 1017.7 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 26 mi59 min N 11 G 14 61°F 1018.3 hPa
RCMC1 - 9414863 - Richmond, CA 26 mi65 min NNE 8.9 G 12 64°F 57°F1017.7 hPa
PRYC1 - 9415020 - Point Reyes, CA 36 mi59 min WNW 11 G 14 53°F 51°F1018.2 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 38 mi59 min WNW 1.9 G 4.1 62°F 1018 hPa
UPBC1 40 mi59 min WNW 8 G 11
MZXC1 - 9415102 - Martinez-Amorco CA 40 mi59 min W 11 G 13 63°F 60°F1018.2 hPa36°F
PCOC1 - 9415144 - Port Chicago, CA 44 mi59 min W 4.1 G 6 62°F 60°F1017.8 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 49 mi59 min W 2.9 G 2.9 60°F 1017.8 hPa

Wind History for San Francisco, CA
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Half Moon Bay Airport, CA6 mi22 minN 04.00 miFog/Mist46°F44°F93%1018.3 hPa
San Francisco, San Francisco International Airport, CA12 mi21 minNE 410.00 miFair61°F46°F58%1018 hPa
San Carlos Airport, CA18 mi22 minWNW 510.00 miFair57°F39°F51%1018.3 hPa
Oakland, Metro Oakland International Airport, CA21 mi24 minN 410.00 miFair61°F36°F39%1018 hPa

Wind History from SFO (wind in knots)
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Last 24hrW8W8W7W8W10W12W12W10W14W14W20W20W20W23W21W19
G27
W18W15W14W9W8NW14N11N9
1 day agoW15W16W11W8W4N3N4W9W18W15W18W19
G26
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G31
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2 days agoSW5SW6SW7SW5W5SW5SW8W10SW12W13W14W14W12W15W19W16W14
G24
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G27
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W20W19NW11

Tide / Current Tables for Half Moon Bay, California
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Half Moon Bay
Click for Map
Sat -- 12:45 AM PDT     6.00 feet High Tide
Sat -- 06:16 AM PDT     Sunrise
Sat -- 07:38 AM PDT     -1.27 feet Low Tide
Sat -- 09:14 AM PDT     Moonrise
Sat -- 02:36 PM PDT     4.55 feet High Tide
Sat -- 07:41 PM PDT     2.18 feet Low Tide
Sat -- 07:58 PM PDT     Sunset
Sat -- 11:50 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.865.54.32.71-0.3-1.1-1.2-0.70.31.52.83.84.44.54.13.42.72.32.22.63.34.3

Tide / Current Tables for South Channel, San Francisco Bay Approach, California Current
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South Channel
Click for Map
Sat -- 02:30 AM PDT     -0.00 knots Slack
Sat -- 05:46 AM PDT     -2.17 knots Max Ebb
Sat -- 06:16 AM PDT     Sunrise
Sat -- 09:14 AM PDT     Moonrise
Sat -- 09:16 AM PDT     0.01 knots Slack
Sat -- 12:21 PM PDT     1.66 knots Max Flood
Sat -- 04:14 PM PDT     -0.00 knots Slack
Sat -- 06:24 PM PDT     -1.10 knots Max Ebb
Sat -- 07:59 PM PDT     Sunset
Sat -- 09:17 PM PDT     0.00 knots Slack
Sat -- 11:50 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.20.80.3-0.4-1.3-2-2.1-1.7-1-0.20.61.31.61.61.30.80.2-0.6-1.1-1-0.6-0.20.40.8

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 (7,2,3,4)
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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.