Friday, October20, 2017 L-36.com


Marine Weather and Tides
Sunnyvale, 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 7:20AMSunset 6:23PM Friday October 20, 2017 11:04 AM PDT (18:04 UTC) Moonrise 7:05AMMoonset 6:22PM 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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PZZ530 San Pablo Bay Suisun Bay The West Delta And San Francisco Bay North Of The Bay Bridge- 906 Am Pdt Fri Oct 20 2017
Today..W winds 10 to 20 kt.
Tonight..W winds 10 to 20 kt.
Sat..W winds 5 to 15 kt.
Sat night..NW winds 5 to 15 kt.
Sun..W winds 5 to 15 kt.
Mon..N winds 10 kt.
Tue..NE winds 5 kt...becoming w.
PZZ500 906 Am Pdt Fri Oct 20 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Lighter winds will persist in the wake of a cold front that is passing through the coastal waters tonight. A long period northwesterly swell will accompany this system creating hazardous seas for mariners operating small crafts. Mariners are urged to use extreme caution if out at sea as hazardous seas are forecast to persist over the next few days.

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 201540
afdmtr
area forecast discussion
national weather service san francisco bay area
840 am pdt Fri oct 20 2017

Synopsis Now that shower activity has moved out of the area
dry weather will prevail through the forecast period. Cooler
temperatures and breezy onshore winds will persist today before a
warming trend begins over the weekend and into early next week.

Temperatures are forecast to be well above average through most of
next week.

Discussion As of 8:40 am pdt Friday... Last nights system
quickly moved through with rain beginning in the north bay in the
evening and reaching san francisco by around 11 pm. Rainfall
totals varied across the CWA with areas in the north bay mountains
receiving up to 0.91" at middle peak in marin county to 0.40" in
boulder creek in the santa cruz mountains down to only a few
hundredths of an inch for parts of monterey county and far
eastern inland areas.

Cool temperatures are expected again today with highs forecast in
the upper 50s and 60s for most locations. Along with cool
temperatures, breezy onshore winds will persist throughout the day
reaching 15 to 25 mph in the afternoon, with higher gusts
possible.

The main forecast concern will be the warm temperatures for the
region early next week.

Prev discussion As of 3:05 am pdt Friday... A warming trend
will begin during the weekend as an upper level ridge builds over
the state. Much warmer temperatures are then forecast early in the
work week as the upper ridge strengthens along the west coast and
light offshore flow develops. On Monday and Tuesday expect
widespread high temperatures in the 80s to around 90, with these
warm temperatures developing not only inland, but in coastal areas
as well. Slight cooling is projected late in the week as the
ridge begins to weaken.

Aviation As of 5:10 am pdt Friday... For 12z tafs. Colder and
drier air filter in on the backside of the frontal boundary has
resulted in mostly clear skies with only patches of low clouds
this morning. Temporary CIGS possible between now and sunrise with
rapid clearing expected this morning. Winds anticipated to veer
increasingly to the west with speeds increasing this afternoon to
around 10-15 kt with gusts around 20-25 kt.

Overall forecast confidence: moderate to high
vicinity of ksfo... .MVFR CIGS will scatter out relatively fast
this morning as a drier airmass settles into the region.VFR
conditions expected through the remainder of the forecast period.

West winds will gradually increase to around 15 kt this afternoon
with gust to around 25 kt possible.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR conditions anticipated to persist
through the remainder of the forecast period. Light winds will
veer increasingly to the west with speeds increasing this
afternoon to around 10-15 kt with gusts around 20 kt possible.

Fire weather As of 3:05 am pdt Friday... Rainfall which moved
across the district overnight brought wetting rains to many
locations. Highest rainfall amounts were in the north bay
mountains, but many locations at lower elevations received around
a quarter of an inch. Rainfall should end in most areas by mid
morning. Today will be a cool day with brisk northwest winds.

A warming trend will get underway during the weekend as a high
pressure ridge begins to build over california. This ridge will
strengthen into early next week and result in warm and dry
conditions districtwide from Monday through Wednesday. Will need
to be wary of possible gusty offshore winds in the hills beginning
late in the weekend and continuing into Monday night.

Marine As of 2:37 am pdt Friday... Moderate northwesterly winds
will persist in the wake of a cold front that is passing through
the coastal waters tonight. A long period northwesterly swell
will accompany this system creating hazardous seas for mariners
operating small crafts. Mariners are urged to use extreme caution
if out at sea as hazardous seas are forecast to persist over the
next few days.

Mtr watches warnings advisories
Tday High surf advisory... Caz006-505-509-529-530
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... Mry bay
sca... Pt arena to pt reyes 0-10 nm
sca... Pt reyes to pigeon pt 0-10 nm
sca... Rough bar advisory for sf bar
public forecast: as sims
aviation: cw
marine: cw
fire weather: sims
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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 mi46 min WSW 6 G 8 59°F 64°F1018.9 hPa
AAMC1 - 9414750 - Alameda, CA 30 mi46 min W 2.9 G 4.1 58°F 61°F1019.7 hPa
LNDC1 30 mi46 min W 4.1 G 5.1 57°F 1019.2 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 32 mi46 min WNW 5.1 G 6
OKXC1 - 9414776 - Oakland (Berth 34), CA 33 mi46 min WNW 7 G 8 58°F 1019.2 hPa
OBXC1 33 mi46 min 58°F 49°F
PXSC1 34 mi46 min 59°F 50°F
FTPC1 - 9414290 - San Francisco, CA 37 mi52 min SW 4.1 G 8 57°F 57°F1019.5 hPa
RCMC1 - 9414863 - Richmond, CA 42 mi52 min W 4.1 G 5.1 58°F 59°F1019 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 43 mi46 min WSW 6 G 8 58°F 62°F1019.1 hPa50°F
46237 - San Francisco Bar, CA (142) 43 mi64 min 55°F10 ft
PCOC1 - 9415144 - Port Chicago, CA 44 mi46 min WSW 5.1 G 8 58°F 62°F1018.8 hPa
ELXC1 - Elkhorn Slough Reserve, CA 44 mi79 min Calm 56°F 1018 hPa53°F
46092 - MBM1 46 mi52 min W 3.9 56°F 56°F1019.7 hPa (+2.3)
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 48 mi74 min WNW 5.8 G 9.7 58°F 58°F17 ft1019.1 hPa (+2.5)
46042 - MONTEREY - 27NM West of Monterey Bay, CA 49 mi74 min Calm G 3.9 57°F 55°F14 ft1019.6 hPa (+2.4)

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Mountain View, Moffett Field, CA4 mi68 minN 010.00 miA Few Clouds57°F51°F81%1019.6 hPa
San Jose, San Jose International Airport, CA4 mi71 minN 010.00 miMostly Cloudy58°F52°F81%1019.2 hPa
Palo Alto Airport, CA8 mi69 minW 510.00 miMostly Cloudy57°F53°F88%1019.3 hPa
San Jose / Reid / Hillv, CA10 mi77 minN 010.00 miMostly Cloudy57°F51°F82%1020.7 hPa
San Carlos Airport, CA16 mi74 minWSW 410.00 miMostly Cloudy57°F50°F77%1019.6 hPa
Hayward, Hayward Air Terminal, CA18 mi70 minS 810.00 miMostly Cloudy58°F50°F75%1019.9 hPa
Livermore, Livermore Municipal Airport, CA21 mi71 minN 010.00 miA Few Clouds55°F51°F87%1018.4 hPa
Oakland, Metro Oakland International Airport, CA23 mi71 minWNW 310.00 miMostly Cloudy57°F52°F83%1019.1 hPa
San Francisco, San Francisco International Airport, CA24 mi68 minSW 610.00 miMostly Cloudy59°F48°F69%1019.1 hPa

Wind History from SJC (wind in knots)
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Last 24hrNW7NW5NW35NW8NW11N6N5E5S6SE9SE8SE10NW17
G27
W12NW5NW6NW6NW3S3S3SE3CalmW6
1 day agoCalm3NW5NW9NW9NW12NW15W8W6W3NW3NW8NW4CalmSE3N4NW5NW5N5SW3SW3CalmCalmCalm
2 days agoCalmNW5NW6NW5NW7NW6W8W5W4CalmW3CalmW4W7CalmW4CalmCalmCalmCalmCalmCalmCalmCalm

Tide / Current Tables for Gold Street Bridge, Alviso Slough, San Francisco Bay, California
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Gold Street Bridge
Click for Map
Fri -- 01:46 AM PDT     8.65 feet High Tide
Fri -- 07:21 AM PDT     Sunrise
Fri -- 08:04 AM PDT     Moonrise
Fri -- 08:26 AM PDT     1.45 feet Low Tide
Fri -- 01:32 PM PDT     9.83 feet High Tide
Fri -- 06:23 PM PDT     Sunset
Fri -- 07:22 PM PDT     Moonset
Fri -- 09:04 PM PDT     0.07 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.58.28.68.16.85.23.52.21.51.73.35.67.99.69.897.65.63.51.70.50.10.72.5

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
Fri -- 02:06 AM PDT     -0.01 knots Slack
Fri -- 06:07 AM PDT     -0.98 knots Max Ebb
Fri -- 07:21 AM PDT     Sunrise
Fri -- 08:05 AM PDT     Moonrise
Fri -- 08:27 AM PDT     0.00 knots Slack
Fri -- 10:58 AM PDT     1.25 knots Max Flood
Fri -- 01:54 PM PDT     -0.00 knots Slack
Fri -- 06:20 PM PDT     -1.31 knots Max Ebb
Fri -- 06:23 PM PDT     Sunset
Fri -- 07:22 PM PDT     Moonset
Fri -- 08:58 PM PDT     0.01 knots Slack
Fri -- 11:39 PM PDT     1.45 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.30.90.1-0.4-0.7-0.9-1-0.8-0.30.411.31.10.6-0-0.5-0.9-1.2-1.3-1.2-0.700.91.4

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 (14,3,4,5)
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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.