Monday, March27, 2017 L-36.com


Marine Weather and Tides
Los Altos Hills, 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 6:57AMSunset 7:28PM Monday March 27, 2017 7:35 AM PDT (14:35 UTC) Moonrise 5:59AMMoonset 6:17PM Illumination 0% Phase: New Moon; Moon at 0 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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PZZ560 Pigeon Point To Point Pinos To 10 Nm- 254 Am Pdt Mon Mar 27 2017
.small craft advisory in effect from noon pdt today through Tuesday afternoon...
Today..NW winds 15 to 25 kt. Wind waves 4 to 6 ft. W swell 6 to 8 ft at 11 seconds.
Tonight..NW winds 15 to 25 kt. Wind waves 4 to 6 ft. NW swell 9 to 11 ft at 11 seconds.
Tue..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 8 to 10 ft at 11 seconds.
Tue night..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 9 to 11 ft at 13 seconds.
Wed..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 8 to 10 ft at 15 seconds.
Thu..NW winds 20 to 30 kt. Wind waves 4 to 6 ft. W swell 8 to 9 ft.
Fri..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 9 to 11 ft.
PZZ500 254 Am Pdt Mon Mar 27 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Northwest winds will increase this afternoon through at least Tuesday as a strong surface pressure gradient builds across the region. At the same time, a building northwest swell will pass through the waters. Typical gusty spring time northwest winds will continue at least through midweek and likely through Friday as the next weather system will likely increase the surface pressure gradient once again.

7 Day Forecast for Marine Location Near Los Altos Hills, CA
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location: 37.35, -122.18     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 271200
afdmtr
area forecast discussion
national weather service san francisco bay area
500 am pdt Mon mar 27 2017

Synopsis Partly cloudy skies are forecast today along with
brisk northwest winds during the afternoon and evening. High
pressure will build over california through midweek, resulting in
dry weather and a warming trend through Wednesday. Slightly cooler
conditions are expected on Thursday as a weather system moves
into eastern california. That weather system will bring only a
slight chance of showers to the northern and eastern portions of
our area, and also result in blustery conditions near the coast
and in the hills by late Thursday. High pressure will redevelop
late in the week and result in warmer weather once again by the
weekend.

Discussion As of 2:45 am pdt Monday... The weak frontal system
that brought light rain to much of our region Sunday afternoon and
evening has moved off to our east and south early this morning.

Radar still shows isolated light showers over our area, but all
shower activity is expected to end by daybreak as drier air
continues to move in from the northwest. That drier airmass is
already resulting in clearing in the north bay and this clearing
trend is expected to continue from north to south through this
morning. By afternoon, expect mostly sunny to partly cloudy skies
in all areas.

Surface high pressure will begin to build off the northern
california coast today and the resulting tightening pressure
gradients will generate brisk northwest winds along the coast
this afternoon. Local gusts up to 35 mph are possible in the
windier coastal locations from late afternoon through early
evening.

An upper level ridge is forecast to build over california during
the next few days, resulting in dry weather and a warming trend
through Wednesday. By Wednesday, high temperatures will be mostly
in the upper 60s and 70s, with a few lower 80s possible in
monterey and san benito counties.

Daytime temperatures on Thursday will cool by 5 to 10 degrees as
an inside slider type system drops inland to our east. The gfs
keeps all precipitation with this system to our north and east,
but the ECMWF tracks the system a bit farther to the west and
clips the northern and eastern fringes of our area with light
shower activity late Wednesday night and Thursday morning. Either
solution will result in blustery conditions in the hills and near
the coast by Thursday afternoon when locally strong northwest
winds develop. Northerly winds will ease near the coast by Friday,
but remain locally strong and gusty in the hills into Friday
night.

Upper level ridging is forecast to redevelop over california just
in time for the weekend, and current model projections indicate
dry and seasonably warm weather on both Saturday and Sunday.

Aviation As of 4:55 am pdt Monday for 12z tafs. Winds have
switched to the northwest overnight with a weak frontal passage.

ExpectVFR conditions to prevail after 16z. There are a few low
clouds around ksfo and kmry as of 11z, but not expecting there to
be significant impacts as the boundary layer continues to dry
through the day. West to northwest winds can be expected this
afternoon with possible gusts exceeding 25 kts in the afternoon.

Vicinity of ksfo... MVFR conditions early this morning with a few
low cloud decks. Expect ceilings to improve by 16z as drier air
continues to move in. West to northwest winds will become gusty
this afternoon in excess of 20 to 25 kts.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... A few low clouds continue to impact kmry
this morning with ceilings around 3000 ft. ExpectVFR conditions
by mid-morning with gusty west to northwest winds this afternoon,
notably at ksns.

Marine As of 04:47 am pdt Monday... Northwest winds will
increase this afternoon through at least Tuesday as a strong
surface pressure gradient builds across the region. At the same
time, a building northwest swell will pass through the waters.

Typical gusty spring time northwest winds will continue at least
through midweek and likely through Friday as the next weather
system will likely increase the surface pressure gradient once
again.

Mtr watches/warnings/advisories
Tday Sca... Pt arena to pt reyes 0-10 nm from 12 pm
sca... Pt reyes to pigeon pt 0-10 nm from 12 pm
sca... Pigeon pt to pt pinos 0-10 nm from 12 pm
sca... Pt arena to pigeon pt 10-60 nm from 12 pm
sca... Pigeon pt to pt piedras blancas 10-60 nm from 12 pm
sca... Pt pinos to pt piedras blancas 0-10 nm from 6 am
sca... Mry bay from 12 pm
sca... Sf bay from 12 pm
public forecast: dykema
aviation: rowe
marine: rowe
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 11 mi48 min WNW 7 G 9.9 52°F 59°F1021.7 hPa
AAMC1 - 9414750 - Alameda, CA 30 mi48 min WNW 4.1 G 6 53°F 59°F1022.4 hPa
LNDC1 31 mi48 min NW 2.9 G 6 53°F 1022 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 32 mi48 min WNW 9.9 G 12
PXSC1 33 mi48 min 54°F 46°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 33 mi48 min NNW 8.9 G 15 53°F 1022 hPa
OBXC1 33 mi48 min 53°F 46°F
FTPC1 - 9414290 - San Francisco, CA 35 mi48 min WNW 7 G 8.9 53°F 56°F1022.3 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 37 mi46 min NW 18 G 21 54°F 55°F6 ft1021.7 hPa (+1.4)
46237 - San Francisco Bar, CA (142) 39 mi66 min 55°F6 ft
PPXC1 - 9414847 - Richmond (Point Potrero), CA 40 mi48 min NW 4.1 G 5.1 53°F 1022.3 hPa
RCMC1 - 9414863 - Richmond, CA 41 mi48 min NW 7 G 8.9 52°F 57°F1021.8 hPa
46042 - MONTEREY - 27NM West of Monterey Bay, CA 41 mi46 min 18 G 21 55°F 56°F6 ft1021.8 hPa (+1.4)
46092 - MBM1 42 mi87 min WNW 9.7 54°F 56°F1020.5 hPa (+1.0)
46114 - West Monterey Bay, CA 44 mi36 min 56°F6 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 45 mi46 min NNW 18 G 21 54°F 55°F6 ft1022 hPa (+1.5)
MZXC1 - 9415102 - Martinez-Amorco CA 47 mi48 min NW 8.9 G 11 51°F 56°F1022.1 hPa48°F
UPBC1 48 mi48 min WNW 8.9 G 11
PCOC1 - 9415144 - Port Chicago, CA 49 mi48 min W 9.9 G 15 51°F 56°F1021.6 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 49 mi48 min NW 9.9 G 14 52°F 1021.8 hPa

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Mountain View, Moffett Field, CA9 mi1.7 hrsVar 310.00 miA Few Clouds51°F46°F86%1022 hPa
Palo Alto Airport, CA10 mi49 minW 710.00 miPartly Cloudy50°F48°F94%1022.3 hPa
San Carlos Airport, CA13 mi41 minNW 510.00 miPartly Cloudy52°F46°F82%1022.3 hPa
San Jose, San Jose International Airport, CA13 mi43 minN 010.00 miMostly Cloudy51°F45°F80%1022.3 hPa
San Jose / Reid / Hillv, CA19 mi49 minW 510.00 miMostly Cloudy48°F46°F94%1023 hPa
Half Moon Bay Airport, CA20 mi41 minN 67.00 miOvercast54°F48°F82%1022.3 hPa
San Francisco, San Francisco International Airport, CA21 mi1.7 hrsNW 710.00 miMostly Cloudy52°F45°F77%1021.3 hPa
Hayward, Hayward Air Terminal, CA22 mi42 minVar 310.00 miA Few Clouds50°F42°F74%1023.1 hPa
Oakland, Metro Oakland International Airport, CA24 mi43 minNW 710.00 miA Few Clouds53°F46°F80%1022.1 hPa

Wind History from NUQ (wind in knots)
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Last 24hrSE4SE3SE5SE4E6E5SE6S6--S5S7S9SE8SE6W6NW4W4CalmNW6NW3CalmW43W5
1 day agoCalmNW3N5N11N10N11N14N14N14N14N12NW5NW8NW4NW4CalmW3CalmCalmCalmCalmCalmCalmCalm
2 days agoSE13SE11S16
G26
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G23
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G19
SE9SE7SE9SE7SE4SE3SE3SE3CalmSE3CalmCalmCalmCalmCalmW3W53NW3

Tide / Current Tables for Palo Alto Yacht Harbor, California
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Palo Alto Yacht Harbor
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Mon -- 01:06 AM PDT     7.72 feet High Tide
Mon -- 06:58 AM PDT     Moonrise
Mon -- 07:00 AM PDT     Sunrise
Mon -- 07:48 AM PDT     0.84 feet Low Tide
Mon -- 01:15 PM PDT     8.06 feet High Tide
Mon -- 07:16 PM PDT     Moonset
Mon -- 07:27 PM PDT     Sunset
Mon -- 07:59 PM PDT     New Moon
Mon -- 08:06 PM PDT     0.22 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
7.17.77.36.24.83.42.11.10.91.63.25.37.187.76.64.93.31.80.70.20.624.1

Tide / Current Tables for Dumbarton Point 2.3 mi NE, South San Francisco Bay, California Current
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Dumbarton Point 2.3 mi NE
Click for Map
Mon -- 01:16 AM PDT     -0.00 knots Slack
Mon -- 05:25 AM PDT     -1.24 knots Max Ebb
Mon -- 06:58 AM PDT     Moonrise
Mon -- 07:00 AM PDT     Sunrise
Mon -- 07:42 AM PDT     0.01 knots Slack
Mon -- 10:19 AM PDT     1.53 knots Max Flood
Mon -- 01:25 PM PDT     -0.00 knots Slack
Mon -- 05:44 PM PDT     -1.38 knots Max Ebb
Mon -- 07:16 PM PDT     Moonset
Mon -- 07:26 PM PDT     Sunset
Mon -- 07:59 PM PDT     New Moon
Mon -- 08:04 PM PDT     0.00 knots Slack
Mon -- 10:42 PM PDT     1.59 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
10.2-0.3-0.7-1.1-1.2-1.1-0.50.31.11.51.410.3-0.3-0.7-1.1-1.3-1.4-0.9-0.10.81.41.6

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 (10,2,3,4)
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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.