Sunday, December17, 2017 L-36.com


Marine Weather and Tides
Menlo Park, CA

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
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.

Sunrise 7:16AMSunset 4:54PM Sunday December 17, 2017 5:46 AM PST (13:46 UTC) Moonrise 6:36AMMoonset 4:52PM Illumination 1% Phase: Waning Crescent; Moon at 29 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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PZZ530 San Pablo Bay Suisun Bay The West Delta And San Francisco Bay North Of The Bay Bridge- 239 Am Pst Sun Dec 17 2017
Today..N winds 10 kt.
Tonight..E winds 5 kt.
Mon..NE winds 5 kt.
Mon night..NE winds 10 kt.
Tue..E winds 10 kt...becoming sw. Chance of rain after midnight.
Wed..NW winds 5 to 15 kt. Chance of showers.
Thu..N winds 5 to 15 kt...decreasing to 5 kt.
PZZ500 239 Am Pst Sun Dec 17 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Winds will decrease today as an upper level trough over the inlterior moves east. High pressure will build off the northern california coast bringing light to moderate north winds tonight through Tuesday. Northwest winds will increase Tuesday night and Wednesday after a frontal system moves across the area.

7 Day Forecast for Marine Location Near Menlo Park, CA
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location: 37.52, -122.16     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 171212
afdmtr
area forecast discussion
national weather service san francisco bay area
412 am pst Sun dec 17 2017

Synopsis Gusty northerly winds and dry conditions will continue
this morning, especially over the north and east bay hills. Winds
will then diminish, but with dry conditions and above average
daytime temperatures continuing through the first part of the
week. A pacific weather system is projected to move rapidly
southeastward through northern california Tuesday night and
Wednesday, with rain chances spreading southward into the greater
san francisco bay region. High pressure then looks to rapidly
rebuild along the coast with dry weather and seasonal temperatures
for the latter part of the week and next weekend.

Discussion As of 03:30 am pst Sunday... Aside from some thin
high cloudiness drifting through, mostly clear skies prevail
across our district. Winds continue to be locally strong and
gusty in the north and east bay hills and am therefore continuing
the wind advisory for these zones into the morning. Elsewhere
winds have generally diminished and the wind advisories have been
cancelled. Will note that at a few locations the winds did
surface. Napa airport, in particular, stood out as a low elevation
site with an interval of strong winds during the overnight hours,
recording a peak gust of 43 mph at 1:25 am pst. The red flag
warning remains in effect across all higher elevation portions of
our district until 10 am pst.

The ridge of high pressure now building into the west coast will
persist through the first part of the week, but then looks to
begin weakening and shifting inland as a strong upper level system
moves rapidly southeastward through the pacific northwest.

Although latest model output continues to show the primary
associated precip band moving inland to our north, more recent
solutions have trended westward and now do bring its tail end
through our district in a late Tuesday night to Wednesday time
frame. Have therefore begun ramping up associated pops, and noted
just received 06z runs of the NAM and GFS are a bit wetter still.

That said, rainfall totals are likely to be on the small side,
given the limited moisture supply and rapid speed of movement.

As we then head into the latter part of the week, high pressure at
the surface and aloft again looks to rapidly rebuild along and
into the west coast, with dry conditions and offshore flow
returning for the latter of the week and into next weekend.

Aviation As of 4:00 am pst Sunday... Dry northerly flow will
bringVFR conditions through Monday. Stronger winds aloft will
cause low level wind shear this morning. Winds decrease after 18z.

Vicinity of ksfo...VFR. Northerly winds gusting as high as 40 kt
above 1000 feet will cause low level wind shear through 16-17z.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR.

Fire weather As of 3:35 am pst Sunday... A red flag warning
remains in effect through 10 am pst Sunday for elevations at or
above 1,000 feet across the entire region. Dry conditions will
persist with early morning maximum humidity values likely confined
to the 20 to 30% range, especially in the higher elevations.

Along with the very dry air mass, breezy to gusty winds will
continue during the morning hours, especially over higher
elevations in the north and east bay hills. Wind speeds are then
forecast to diminish, however dry conditions will continue into
the first part of the week.

Marine As of 3:02 am pst Sunday... A broad thermal trough
positioned over california will maintain moderate winds over the
northern outer coastal waters with lighter winds along the coast
through Friday. Steep fresh swell is expected to accompany the
moderate winds across the northern outer waters. The thermal
trough is anticipated to slide west Friday afternoon promoting
generally light southerly winds and improving sea conditions into
the weekend.

Mtr watches warnings advisories
Tday Wind advisory... North and east bay hills until 10 am
sca... Pt arena to pigeon pt 10-60 nm
sca... Pigeon pt to pt piedras blancas 10-60 nm until 2 pm
public forecast: blier
aviation: W pi
marine: W pi
fire weather: W blier
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 3 mi46 min WSW 2.9 G 5.1 49°F 53°F1016.5 hPa (+0.4)
AAMC1 - 9414750 - Alameda, CA 19 mi46 min N 6 G 11 55°F 53°F1015.8 hPa (+0.3)
LNDC1 20 mi58 min N 6 G 9.9 55°F 1015.8 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 21 mi46 min NNE 9.9 G 11
OBXC1 22 mi46 min 55°F 29°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 22 mi46 min N 12 G 14 55°F 1015.9 hPa (+0.3)
PXOC1 - 9414311 - San Francisco (Pier 1), CA 23 mi46 min N 8.9 G 12 55°F 1014.9 hPa (+0.0)
PXSC1 23 mi46 min 57°F 33°F
FTPC1 - 9414290 - San Francisco, CA 26 mi46 min NNE 12 G 19 58°F 53°F1016.1 hPa (-0.0)
PPXC1 - 9414847 - Richmond (Point Potrero), CA 29 mi46 min ENE 2.9 G 6 58°F 1016.3 hPa (-0.0)
TIBC1 - Tiburon Pier, San Francisco Bay, CA 30 mi37 min N 7 56°F 1016 hPa
46237 - San Francisco Bar, CA (142) 31 mi46 min 53°F5 ft
RCMC1 - 9414863 - Richmond, CA 31 mi46 min NE 5.1 G 11 57°F 53°F1015.8 hPa (-0.0)
MZXC1 - 9415102 - Martinez-Amorco CA 36 mi46 min ESE 1.9 G 1.9 53°F 53°F1016.3 hPa (-0.0)26°F
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 37 mi46 min NNE 17 G 22 57°F 1015.7 hPa (+0.0)
PCOC1 - 9415144 - Port Chicago, CA 38 mi46 min S 5.1 G 5.1 51°F 52°F1016.1 hPa (-0.0)
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 39 mi46 min NNW 2.9 G 6 52°F 1016.5 hPa (+0.8)
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 39 mi56 min NW 9.7 G 12 55°F 54°F7 ft1015.9 hPa (+0.5)
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 40 mi56 min NNW 16 G 19 55°F 57°F9 ft1015.4 hPa (+0.6)
SFXC1 - San Francisco Bay Reserve, CA 48 mi61 min NE 8 51°F 1016 hPa19°F

Wind History for Redwood City, CA
(wind in knots)    EDIT      (on/off)   Help
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W8
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Carlos Airport, CA5 mi51 minWNW 410.00 miFair48°F24°F40%1016.3 hPa
Mountain View, Moffett Field, CA9 mi50 minSW 310.00 miFair47°F24°F41%1016.7 hPa
Hayward, Hayward Air Terminal, CA10 mi52 minN 010.00 miFair50°F16°F26%1016.9 hPa
San Francisco, San Francisco International Airport, CA13 mi50 minN 910.00 miA Few Clouds56°F25°F30%1016.1 hPa
Oakland, Metro Oakland International Airport, CA13 mi53 minNE 810.00 miMostly Cloudy50°F19°F30%1016.3 hPa
San Jose, San Jose International Airport, CA16 mi53 minNW 610.00 miFair54°F16°F22%1016 hPa
Half Moon Bay Airport, CA18 mi51 minNW 510.00 miFair55°F19°F24%1014.9 hPa
Livermore, Livermore Municipal Airport, CA22 mi53 minN 1210.00 miFair52°F18°F26%1015.8 hPa

Wind History from PAO (wind in knots)
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Last 24hr--------------------NW10NW15NW21--NW22
G28
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G30
NW25
G33
NW18
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NW15NW15
G23
--NW14--Calm
1 day ago------------------CalmCalm----44--NW7N5N5NW6NW6CalmCalmCalm
2 days ago------------------CalmCalmCalmCalm84N8--W8NW6NW6NW6CalmCalmCalm

Tide / Current Tables for Redwood Creek, C.M. No.8, San Francisco Bay, California
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Redwood Creek
Click for Map
Sun -- 12:25 AM PST     6.84 feet High Tide
Sun -- 05:40 AM PST     2.73 feet Low Tide
Sun -- 06:35 AM PST     Moonrise
Sun -- 07:17 AM PST     Sunrise
Sun -- 11:17 AM PST     8.29 feet High Tide
Sun -- 04:52 PM PST     Moonset
Sun -- 04:52 PM PST     Sunset
Sun -- 06:30 PM PST     -0.57 feet Low Tide
Sun -- 10:31 PM PST     New Moon
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.86.764.93.82.92.83.54.96.47.68.38.17.15.53.71.90.5-0.4-0.40.41.93.55.2

Tide / Current Tables for Dumbarton Bridge, San Francisco Bay, California Current
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Dumbarton Bridge
Click for Map
Sun -- 01:40 AM PST     -0.00 knots Slack
Sun -- 03:39 AM PST     -0.59 knots Max Ebb
Sun -- 06:12 AM PST     0.00 knots Slack
Sun -- 06:35 AM PST     Moonrise
Sun -- 07:17 AM PST     Sunrise
Sun -- 09:20 AM PST     1.33 knots Max Flood
Sun -- 12:40 PM PST     -0.00 knots Slack
Sun -- 03:39 PM PST     -1.56 knots Max Ebb
Sun -- 04:52 PM PST     Moonset
Sun -- 04:52 PM PST     Sunset
Sun -- 07:12 PM PST     0.00 knots Slack
Sun -- 10:31 PM PST     1.69 knots Max Flood
Sun -- 10:31 PM PST     New Moon
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.10.5-0.2-0.5-0.6-0.4-0.10.411.31.310.5-0.3-1-1.5-1.5-1.3-0.9-0.20.71.31.71.7

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 (8,2,3,4)
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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.