Tuesday, December11, 2018 L-36.com


Marine Weather and Tides
Sunnyvale, 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 7:11AMSunset 4:51PM Tuesday December 11, 2018 8:45 PM PST (04:45 UTC) Moonrise 10:36AMMoonset 8:55PM Illumination 21% Phase: Waxing Crescent; Moon at 4 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 The San Francisco Bay North Of The Bay Bridge- 806 Pm Pst Tue Dec 11 2018
Tonight..NW winds 5 to 15 kt.
Wed..N winds 5 to 15 kt with gusts up to 25 kt.
Wed night..SE winds up to 10 kt.
Thu..NE winds 5 to 15 kt.
Thu night..E winds 5 to 15 kt.
Fri..S winds 5 to 15 kt with gusts up to 25 kt. Rain likely.
Fri night..S winds up to 10 kt. A chance of rain.
Sat..SE winds up to 10 kt.
Sun..S winds 5 to 15 kt. Rain.
PZZ500 806 Pm Pst Tue Dec 11 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Northerly winds will increase overnight across the waters as a cold front moves through. Winds will diminish tomorrow night and into Thursday before turning southerly into Friday. A building northwest swell will impact the waters late this week result in hazardous conditions. A more significant northwest swell is then forecast to arrive Sunday into Monday.


7 Day Forecast for Marine Location Near Sunnyvale, CA
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location: 37.42, -121.98     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 112336
afdmtr
area forecast discussion
national weather service san francisco bay area
336 pm pst Tue dec 11 2018

Synopsis A weak system may bring a few showers to northern sonoma
county tonight. However, for the most part our forecast area is
expected to remain dry and seasonably cool through Thursday.

Another disturbance will bring rain to the region on Friday and
Friday night, especially for areas north of the golden gate. A
potentially wetter system will then bring widespread rain to the
region on Sunday.

Discussion As of 01:50 pm pst Tuesday... The dense fog from
this morning was slow to burn off, but eventually gave way to
sunny skies this afternoon. The last bit of fog is hanging on in
the vicinity of sfo. Given the foggy start temperatures were slow
to rise, but have gradually warmed up this afternoon.

Temperatures are generally running in the 50s to mid 60s.

A weak cold front currently off the pacnw coast is still ontrack
to drift southward toward the north bay tonight. The general trend
over the last few days has be drier and much weaker with the cold
front. In fact, some of the latest hi-res models do not bring much
in the way of precip to the north bay anymore. There could be a
few sprinkles over far northern sonoma county. Fog will also be
possible across the N and E bay valleys tonight, but nothing like
this morning.

High pressure re-builds on Wednesday in response to a digging
trough over the pacific. Dry weather with slightly warmer
temperatures are expected Wed and thur. Some night and morning
patchy fog will once again be possible.

High pressure shifts eastward by Friday as another cold front
approaches from the nw. Latest timing brings some pre-frontal
showers early Friday, but rain chances increase through the day.

Models are at odds on how much rainfall with the Friday cold front
as the GFS continues to be dry and the ECMWF is much wetter. Will
lean toward the ECMWF given recent performances and bring rain
chances through the entire forecast area Friday into Saturday. A
few lingering showers are possible Saturday during the day, but
likelihood is low. The strongest system of the bunch will impact
the region Sunday into Monday. Atmospheric river guidance
indicates a decent moisture plume putting this in the moderate
category for ars. Rainfall will be greatest over the north bay and
terrain favored locations. Would like to see some better model
consensus on the details, but regardless it looks like a good
beneficial rain for the region.

Aviation As of 03:36 pm pst Tuesday... For 00z tafs.VFR
conditions through tonight with increasing high clouds as a weak
cold front approaches. Possible fog development again around the
north and east bay terminals overnight. Low clouds may also
develop at other area terminals overnight and through tomorrow
morning. Timing and the extent of fog low cloud development is
uncertain and overall confidence remains low.VFR conditions
forecast to return late tomorrow morning early in the afternoon.

Winds will remain generally light through the period.

Vicinity of ksfo...VFR through tonight before possible return of
ifr lifr CIGS overnight. Expecting winds to turn onshore late this
afternoon and remain light overnight. Overall confidence on cigs
low.

Sfo bridge approach... Similar to ksfo, may see more cloud
development over the approach.

Monterey bay terminals...VFR with increasing high clouds.

Potential for low clouds and reduced vis overnight, but confidence
is low.

Marine As of 02:47 pm pst Tuesday... North to northwest winds
will diminish briefly this evening before increasing again to
moderate levels during the overnight. Wind speeds will diminish
Wednesday night into Thursday and become southerly. However, a
building northwest swell will impact the coastal waters late in
the week resulting in hazardous conditions. A much more
significant northwest swell is forecast to impact the region
Sunday into Monday.

A larger northwest swell with a moderate period of around 16
seconds will arrive over the coastal waters late Wednesday night
into Thursday. Another reinforcing swell train arrives Friday into
Saturday with the potential need for a high surf advisory. A much
more significant northwest swell is forecast to impact the region
by Sunday afternoon and build into Monday morning. Swell heights
of 18 to 24 feet at around 20 seconds will result in breaking
waves in excess of 30 feet would be possible. Thus, the need for a
high surf warning will be evaluated as the event draws closer.

Mtr watches warnings advisories
Tngt Sca... Pt arena to pigeon pt 10-60 nm from 9 pm
sca... Pigeon pt to pt piedras blancas 10-60 nm from 9 pm
sca... Pt arena to pt reyes 0-10 nm from 3 am
sca... Pt reyes to pigeon pt 0-10 nm from 3 am
sca... Pt pinos to pt piedras blancas 0-10 nm
public forecast: mm
aviation: as
marine: rgass
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 14 mi28 min SSE 1 G 5.1 51°F 56°F1023.1 hPa
LNDC1 30 mi28 min SE 4.1 G 5.1 53°F 1022.4 hPa
AAMC1 - 9414750 - Alameda, CA 30 mi40 min E 5.1 G 6 53°F 55°F1022.6 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 32 mi34 min SE 7 G 8
OKXC1 - 9414776 - Oakland (Berth 34), CA 33 mi28 min SSE 4.1 G 6 53°F 1022.5 hPa
OBXC1 33 mi28 min 53°F 48°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 34 mi28 min SE 6 G 6 54°F 1021.5 hPa
PXSC1 34 mi34 min 55°F 50°F
FTPC1 - 9414290 - San Francisco, CA 37 mi34 min WSW 1.9 G 2.9 53°F 56°F1022.8 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 39 mi28 min SSE 5.1 G 7 56°F 1022.6 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 41 mi53 min WSW 1.9 52°F 1022 hPa (+0.0)
RCMC1 - 9414863 - Richmond, CA 42 mi28 min 55°F
MZXC1 - 9415102 - Martinez-Amorco CA 43 mi34 min SE 1.9 G 4.1 51°F 54°F1022.1 hPa50°F
46237 - San Francisco Bar, CA (142) 43 mi46 min 56°F6 ft
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 43 mi28 min ESE 1.9 G 2.9 52°F 1022.3 hPa
PCOC1 - 9415144 - Port Chicago, CA 44 mi34 min SSE 5.1 G 6 53°F 54°F1022 hPa
ELXC1 - Elkhorn Slough Reserve, CA 44 mi61 min NE 4.1 47°F 1022 hPa44°F
MLSC1 - Moss Landing, South Harbor, CA 44 mi29 min NE 1.9 G 5.1 49°F 1023.5 hPa46°F
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 46 mi28 min SW 5.1 G 6 54°F 1021.7 hPa
46092 - MBM1 46 mi42 min NW 5.8 57°F 59°F1022.9 hPa (+1.7)
46042 - MONTEREY - 27NM West of Monterey Bay, CA 49 mi56 min NNW 18 G 19 58°F 58°F9 ft1022.4 hPa (+1.3)

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Mountain View, Moffett Field, CA4 mi50 minN 010.00 miFair51°F41°F69%1023.7 hPa
San Jose, San Jose International Airport, CA4 mi53 minN 010.00 miPartly Cloudy51°F39°F66%1023.1 hPa
Palo Alto Airport, CA8 mi59 minN 010.00 miA Few Clouds48°F0°F%1023.4 hPa
San Jose / Reid / Hillv, CA10 mi59 minN 010.00 miA Few Clouds50°F41°F71%1022.7 hPa
San Carlos Airport, CA16 mi51 minVar 310.00 miA Few Clouds54°F46°F77%1023 hPa
Hayward, Hayward Air Terminal, CA18 mi52 minE 410.00 miFair51°F42°F71%1023.6 hPa
Livermore, Livermore Municipal Airport, CA21 mi53 minN 010.00 miFair47°F39°F77%1023 hPa
Oakland, Metro Oakland International Airport, CA23 mi53 minESE 310.00 miPartly Cloudy49°F43°F80%1022.7 hPa
San Francisco, San Francisco International Airport, CA24 mi50 minW 1210.00 miPartly Cloudy55°F51°F87%1022 hPa

Wind History from SJC (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmCalmCalmCalmSW3CalmCalmCalmCalm55N4CalmNW4N6N6NW6W4CalmCalm
1 day agoW3NW3CalmCalmCalmCalmCalmE3CalmS3SW3CalmCalmNW4CalmN6NW8NW5W9NW10NW10NW7W5W5
2 days agoSE3CalmCalmCalmCalmCalmCalmCalmCalmCalmSW3CalmCalmCalmNW3NW3NW4N9NW3CalmNW8W6CalmCalm

Tide / Current Tables for Gold Street Bridge, Alviso Slough, San Francisco Bay, California
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Gold Street Bridge
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Tue -- 04:11 AM PST     7.82 feet High Tide
Tue -- 07:12 AM PST     Sunrise
Tue -- 10:08 AM PST     3.46 feet Low Tide
Tue -- 10:35 AM PST     Moonrise
Tue -- 02:24 PM PST     8.80 feet High Tide
Tue -- 04:50 PM PST     Sunset
Tue -- 08:56 PM PST     Moonset
Tue -- 10:36 PM PST     -0.09 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.93.85.77.27.87.66.85.74.63.83.53.95.47.38.68.78.175.43.620.700

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
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Tue -- 12:41 AM PST     1.29 knots Max Flood
Tue -- 04:14 AM PST     -0.01 knots Slack
Tue -- 07:12 AM PST     Sunrise
Tue -- 07:44 AM PST     -0.56 knots Max Ebb
Tue -- 09:58 AM PST     0.00 knots Slack
Tue -- 10:36 AM PST     Moonrise
Tue -- 12:16 PM PST     0.70 knots Max Flood
Tue -- 02:55 PM PST     -0.00 knots Slack
Tue -- 04:50 PM PST     Sunset
Tue -- 07:48 PM PST     -1.19 knots Max Ebb
Tue -- 08:56 PM PST     Moonset
Tue -- 10:38 PM PST     0.01 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.21.31.10.70.1-0.2-0.4-0.5-0.5-0.300.40.70.60.4-0-0.3-0.6-0.9-1.1-1.2-0.8-0.40.2

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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for San Francisco/Monterey Bay Area, CA (23,6,7,8)
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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.