Monday, May20, 2019 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 5:53AMSunset 8:15PM Monday May 20, 2019 7:52 AM PDT (14:52 UTC) Moonrise 9:19PMMoonset 6:28AM Illumination 98% Phase: Waning Gibbous; Moon at 16 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- 244 Am Pdt Mon May 20 2019
Today..SW winds up to 10 kt...becoming W 10 to 20 kt with gusts up to 30 kt this afternoon.
Tonight..SW winds 10 to 20 kt with gusts up to 25 kt. Showers likely.
Tue..W winds 15 to 25 kt with gusts up to 30 kt. Showers likely.
Tue night..NW winds 10 to 20 kt with gusts up to 25 kt.
Wed..W winds 5 to 15 kt.
Wed night..SW winds 5 to 10 kt.
Thu..W winds 5 to 15 kt.
Fri..SW winds 5 to 15 kt.
PZZ500 244 Am Pdt Mon May 20 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Generally light west to northwest winds will persist over the coastal waters through tonight before increasing on Tuesday. Winds will then remain elevated through late this week. Large swells generated by the last storm system will continue to create hazardous conditions, particularly for smaller vessels. West to northwest swell will briefly decrease later today and tonight before building again Tuesday and Wednesday.


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 201130
afdmtr
area forecast discussion
national weather service san francisco bay area
430 am pdt Mon may 20 2019

Synopsis Dry weather conditions are expected through much of the
day ahead of another storm system set to arrive tonight. Look for
light rain to develop late this evening over the north bay and then
across the remainder of the region overnight. Showers will linger
into Tuesday before the return of dry conditions Tuesday night into
Wednesday. Cool and unsettled conditions are likely through the
remainder of the week, yet widspread rainfall appears less likely.

Discussion As of 02:55 am pdt Monday... Isolated showers linger
off of the central coast early this morning as the core of a cold
mid upper level low shifts eastward away from the region.

Expecting a drying trend to continue region-wide through much of
the day with temperatures warming only into the 60s for most
locations this afternoon. A mix of Sun and clouds can also be
expected through the afternoon ahead of the next approaching
weather system.

Another mid upper level storm system is forecast to push inland over
the pacific northwest today with the tail end of a frontal boundary
dropping across the san francisco bay area late this evening and
through the central coast tonight. Light rain will first develop
over the north bay this evening before spreading southward inland
during the overnight hours. Rainfall will generally range from a few
hundredths of an inch to around one-quarter inch through the night.

In wake of the frontal passage, lingering showers will persist into
Tuesday as the core of the mid upper level trough drops southward
over the west coast. The post frontal showers will be mostly
isolated to scattered in nature with the potential for brief
moderate to locally heavy rainfall. Overall, this system will be
weaker and produce less rainfall than the system that moved across
the region this past weekend.

Drier weather is forecast to develop Wednesday and likely to persist
into late week. However, a broad upper trough remains over the
western portion of the country keeping temperatures below seasonal
averages. The best chance for precipitation looks to stay over the
interior portion of the state. Chances for precipitation may return
late in the week and into the upcoming weekend as weak disturbances
round the base of the retrograding trough. Thus, look for cool and
unsettled conditions to persist through the end of the month.

Aviation As of 04:30 am pdt Monday... For 12z tafs. Showers have
mainly ended across the region. Ample low level moisture remains
in place leaving patchy MVFR CIGS and fog in the north bay. Cigs
should become more widely scattered by late this morning. An
upper low will bring increasing clouds and westerly winds to the
area tonight along with some scattered showers. Winds may be gusty
tomorrow morning.

Vicinity of ksfo... Patchy CIGS around the bay area between
2000-4000 ft agl. CIGS may occasionally become bkn this morning
before scattering out by the afternoon. West to southwest winds
through the period becoming gusty tomorrow morning. CIGS will
lower as showers approach this evening.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Showers have mainly ended with patchy
vfr MVFR CIGS 2500-5000 ft through mid morning. CIGS will
redevelop early this evening as showers approach.

Marine As of 02:55 am pdt Monday... Generally light west to
northwest winds will persist over the coastal waters through
tonight before increasing on Tuesday. Winds will then remain
elevated through late this week. Large swells generated by the
last storm system will continue to create hazardous conditions,
particularly for smaller vessels. West to northwest swell will
briefly decrease later today and tonight before building again
Tuesday and Wednesday.

Mtr watches warnings advisories
Tday Sca... Pt arena to pt reyes 0-10 nm
sca... Pt reyes to pigeon pt 0-10 nm
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... Rough bar advisory for sf bar until 4 pm
sca... Mry bay from 1 pm
public forecast: rgass
aviation: as
marine: as
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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 mi34 min SW 1 G 2.9 53°F 62°F1015.2 hPa
AAMC1 - 9414750 - Alameda, CA 30 mi40 min NNW 2.9 G 6 53°F 61°F1015.1 hPa
LNDC1 30 mi34 min NNW 5.1 G 7 53°F 1014.7 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 32 mi40 min NNW 6 G 7
OBXC1 33 mi34 min 53°F 51°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 33 mi34 min N 6 G 7 53°F 1014.8 hPa
PXSC1 34 mi34 min 54°F 52°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 34 mi34 min W 4.1 G 5.1 53°F 1013.8 hPa
FTPC1 - 9414290 - San Francisco, CA 37 mi40 min SSE 1 G 1.9 53°F 58°F1015 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 39 mi34 min NNE 4.1 G 5.1 54°F 1015 hPa
RCMC1 - 9414863 - Richmond, CA 42 mi34 min 60°F
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 43 mi40 min N 5.1 G 6 52°F 1014.4 hPa
UPBC1 43 mi34 min WNW 6 G 8.9
46237 - San Francisco Bar, CA (142) 43 mi52 min 57°F9 ft
MZXC1 - 9415102 - Martinez-Amorco CA 43 mi40 min WNW 6 G 7 51°F 61°F1014.7 hPa51°F
PCOC1 - 9415144 - Port Chicago, CA 44 mi40 min SSW 1.9 G 4.1 52°F 62°F1014.7 hPa
MLSC1 - Moss Landing, South Harbor, CA 44 mi32 min NNE 1.9 G 5.1 50°F 1015.3 hPa49°F
ELXC1 - Elkhorn Slough Reserve, CA 44 mi67 min Calm 48°F 1014 hPa48°F
46092 - MBM1 46 mi39 min N 5.8 53°F 57°F1014.9 hPa (+2.4)
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 46 mi34 min NNW 5.1 G 6 50°F 1014.5 hPa
46042 - MONTEREY - 27NM West of Monterey Bay, CA 49 mi62 min N 3.9 G 5.8 56°F 57°F12 ft1013.5 hPa (+1.4)

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Jose, San Jose International Airport, CA4 mi59 minN 010.00 miMostly Cloudy50°F48°F96%1014 hPa
Mountain View, Moffett Field, CA4 mi1.9 hrsSSE 310.00 miFair49°F46°F93%1013.7 hPa
Palo Alto Airport, CA8 mi65 minVar 47.00 miMostly Cloudy48°F46°F94%1014.9 hPa
San Jose / Reid / Hillv, CA10 mi65 minN 010.00 miMostly Cloudy48°F46°F94%1014.2 hPa
San Carlos Airport, CA16 mi60 minN 010.00 miMostly Cloudy52°F48°F88%1014.2 hPa
Hayward, Hayward Air Terminal, CA18 mi58 minNE 310.00 miMostly Cloudy50°F46°F86%1015 hPa
Livermore, Livermore Municipal Airport, CA21 mi59 minN 07.00 miOvercast50°F48°F96%1013.7 hPa
Oakland, Metro Oakland International Airport, CA23 mi59 minN 010.00 miPartly Cloudy50°F46°F86%1014.3 hPa
San Francisco, San Francisco International Airport, CA24 mi56 minWNW 510.00 miA Few Clouds50°F46°F89%1014.2 hPa

Wind History from SJC (wind in knots)
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Last 24hrNW3E4SE6N6SE7CalmSE6NE6N3NW8NW7W5CalmE4SE3CalmE3CalmSE3S3S3CalmS3Calm
1 day agoCalmS10S9S9S10E7SE7E9SE11SE8SE11S16
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2 days agoS36NE3NW7NW53N6NW9N9N13NW17N11NW10NW8NW8NW6SW3S3SE4SW3S4S5S3SE6

Tide / Current Tables for Gold Street Bridge, Alviso Slough, San Francisco Bay, California
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Gold Street Bridge
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Mon -- 01:44 AM PDT     10.22 feet High Tide
Mon -- 05:55 AM PDT     Sunrise
Mon -- 07:28 AM PDT     Moonset
Mon -- 09:46 AM PDT     -1.27 feet Low Tide
Mon -- 03:42 PM PDT     7.72 feet High Tide
Mon -- 08:14 PM PDT     Sunset
Mon -- 09:37 PM PDT     2.65 feet Low Tide
Mon -- 10:19 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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7.89.710.29.68.36.33.91.7-0-1-1.2-0.21.73.967.47.77.164.73.52.82.84

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 -- 02:00 AM PDT     -0.00 knots Slack
Mon -- 05:55 AM PDT     Sunrise
Mon -- 06:43 AM PDT     -1.58 knots Max Ebb
Mon -- 07:28 AM PDT     Moonset
Mon -- 09:27 AM PDT     0.00 knots Slack
Mon -- 12:13 PM PDT     1.64 knots Max Flood
Mon -- 03:39 PM PDT     -0.00 knots Slack
Mon -- 07:19 PM PDT     -0.75 knots Max Ebb
Mon -- 08:14 PM PDT     Sunset
Mon -- 09:22 PM PDT     0.00 knots Slack
Mon -- 10:19 PM PDT     Moonrise
Mon -- 11:50 PM PDT     1.07 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.10.70-0.4-0.9-1.3-1.5-1.6-1.1-0.40.51.31.61.51.20.5-0.1-0.4-0.6-0.7-0.6-0.20.40.9

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 (10,2,3,4)
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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.