Thursday, August17, 2017 L-36.com


Marine Weather and Tides
Saratoga, 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 6:25AMSunset 7:57PM Thursday August 17, 2017 6:07 PM PDT (01:07 UTC) Moonrise 1:07AMMoonset 3:42PM Illumination 19% Phase: Waning Crescent; Moon at 25 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- 233 Pm Pdt Thu Aug 17 2017
Tonight..W winds 10 kt. Wind waves 2 ft or less. NW swell 3 to 5 ft at 12 seconds. Patchy fog after midnight.
Fri..SW winds 10 kt. Wind waves 2 ft or less. Mixed swell nw 4 to 5 ft at 12 seconds and S 3 ft at 16 seconds. Patchy fog in the morning.
Fri night..SW winds 10 kt. Wind waves 2 ft or less. Mixed swell nw 4 to 5 ft at 11 seconds and S 3 ft at 16 seconds. Patchy fog after midnight.
Sat..SW winds 10 kt. Wind waves 2 ft or less. Mixed swell nw 3 to 4 ft at 11 seconds and S 3 ft at 15 seconds. Patchy fog in the morning.
Sat night..W winds 10 kt. Wind waves 2 ft or less. Mixed swell nw 3 to 4 ft at 11 seconds and S 3 ft at 15 seconds.
Sun..S winds 10 kt. Wind waves 2 ft or less. NW swell 4 to 6 ft.
Mon..SW winds 10 kt. Wind waves 2 ft or less. NW swell 4 to 6 ft.
Tue..W winds 10 kt. Wind waves 2 ft or less. NW swell 3 to 4 ft.
PZZ500 233 Pm Pdt Thu Aug 17 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Winds will be generally light and variable over the coastal waters this evening and overnight. Locally breezy conditions are possible through the evening near the golden gate gap and angel island. Expect increasing northwest winds beginning late Friday and lasting through the weekend as the ridge strengthens further.

7 Day Forecast for Marine Location Near Saratoga, CA
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location: 37.29, -122.05     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 172336
afdmtr
area forecast discussion
national weather service san francisco bay area
436 pm pdt Thu aug 17 2017

Synopsis A gradual warming trend is forecast to continue
through late week as high pressure builds over the region. With
this, overnight and morning clouds can be expected as well,
especially along the coast and nearby valley locations. A cooling
trend is then expected late in the weekend into early next week as
an upper level trough impacts the region.

Discussion As of 12:57 pm pdt Thursday... Low clouds across the
region have mostly retreated to the pacific early this afternoon
with the exception of the north bay coastline and across the
western portion of san francisco. Meanwhile, profiler data
continues to show the marine layer holding on strong at around
1,800-2,000 feet in depth. Above the marine inversion, warmer
temperatures are also noted and have translated to warmer
temperatures in the hills and inland valleys. This trend is likely
to persist through late week as a ridge of high pressure builds
in from the eastern pacific. With the presence of the marine
layer, low clouds will again return to the coast tonight and
spread locally inland into the valleys. Similar to today, these
clouds will burn-off through midmorning and give way to mostly
sunny skies in the afternoon for most locations both on Thursday
and Friday. Overall, temperatures will be near seasonal averages
with 60s to 70s at the coast and 80s to 90s inland.

The aforementioned ridge of high pressure will shift westward out
further into the pacific this upcoming weekend and be replaced by a
mid upper level trough. The latest model run of the GFS continues to
maintain near average temperatures on Saturday before showing a
cooling trend spreading inland Sunday. Meanwhile, the NAM and ecmwf
both show the cooling trend to begin on Saturday and spreading
inland into early next week. Regardless, temperatures are forecast
to cool slightly below seasonal averages early next week. The
challenging part of the forecast will be how much this mid upper
level trough and associated low that is forecast to develop will
impact the marine layer. Depending on the exact set up, the marine
layer may mix out early in the week and result in earlier than
normal burn-off time of low clouds. Overall, dry weather conditions
are also forecast to persist through the middle of next week.

Aviation As of 4:30 pm pdt Thursday... Marine layer cointinues
to compress as an upper level ridge builds off the coast. Onshore
flow is more northwesterly today and this usually keeps stratus
out of the sfo bay area until well after the airport evening rush.

Vicinity of ksfo... MVFR after 10z.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Stratus has cleared farther off the coast
compared to yesterday so CIGS will be later to return. Ifr cigs
after 05z.

Marine As of 4:35 pm pdt Thursday... Winds will be generally
light and variable over the coastal waters this evening and
overnight. Locally breezy conditions are possible through the
evening near the golden gate gap and angel island. Expect
increasing northwest winds beginning late Friday and lasting
through the weekend as the ridge strengthens further.

Mtr watches warnings advisories
Tday Sca... Sf bay
public forecast: rgass
aviation: W pi
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 17 mi50 min N 11 G 15 70°F 73°F1013.7 hPa
AAMC1 - 9414750 - Alameda, CA 36 mi50 min WNW 8.9 G 12 66°F 69°F1015.5 hPa
ELXC1 - Elkhorn Slough Reserve, CA 37 mi83 min WNW 7 66°F 1015 hPa58°F
LNDC1 37 mi50 min W 6 G 8 67°F 1015 hPa
46092 - MBM1 37 mi66 min WSW 5.8 61°F 59°F1015.7 hPa (-1.4)
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 38 mi50 min W 8 G 11
46042 - MONTEREY - 27NM West of Monterey Bay, CA 39 mi78 min SW 1.9 G 1.9 62°F 62°F6 ft1015.8 hPa (-1.4)
OKXC1 - 9414776 - Oakland (Berth 34), CA 39 mi50 min W 9.9 G 14 65°F 1015 hPa
OBXC1 39 mi50 min 65°F 59°F
PXSC1 40 mi50 min 66°F 58°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 40 mi50 min SW 9.9 G 15 65°F 1014 hPa
46114 - West Monterey Bay, CA 42 mi38 min 61°F6 ft
FTPC1 - 9414290 - San Francisco, CA 42 mi50 min W 8.9 G 15 62°F 62°F1015.4 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 44 mi78 min SSW 1.9 G 3.9 62°F 62°F7 ft1015.5 hPa (-1.2)
PPXC1 - 9414847 - Richmond (Point Potrero), CA 46 mi50 min S 4.1 G 7 68°F 1015.1 hPa
46237 - San Francisco Bar, CA (142) 46 mi98 min 61°F4 ft
TIBC1 - Tiburon Pier, San Francisco Bay, CA 47 mi61 min SW 12 67°F 1015 hPa
46240 - Cabrillo Point, Monterey Bay, CA (158) 47 mi47 min 56°F2 ft
RCMC1 - 9414863 - Richmond, CA 48 mi56 min S 2.9 G 8 69°F 64°F1014.5 hPa
MEYC1 48 mi92 min S 8 G 11 65°F 57°F1015.7 hPa

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, CA8 mi75 minWNW 1110.00 miA Few Clouds79°F60°F52%1013.9 hPa
Mountain View, Moffett Field, CA10 mi72 minNNW 1110.00 miFair74°F61°F64%1014.8 hPa
San Jose / Reid / Hillv, CA13 mi2.2 hrsWNW 1610.00 miClear84°F60°F45%1014.9 hPa
Palo Alto Airport, CA14 mi81 minNNW 1110.00 miClear75°F64°F69%1014.6 hPa
San Carlos Airport, CA20 mi81 minNNW 910.00 miClear77°F57°F51%1014.6 hPa

Wind History from SJC (wind in knots)
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Last 24hrNW8W9NW9W6CalmCalmSE4SE7SE7SE4SE6SE5SE6SE5CalmCalmCalm4NW8NW7NW10W10NW11NW11
1 day agoNW12NW11N8N6W3N6N4CalmE3SE5E6E7SE7SE6SE6E9SE6N53CalmW10W13NW9W11
2 days agoNW14W9W5W10NW74CalmNW4SW4SW6SW3S4S6SE9SE745E45NW9NW16NW13
G20
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NW15

Tide / Current Tables for Gold Street Bridge, Alviso Slough, San Francisco Bay, California
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Gold Street Bridge
Click for Map
Thu -- 02:06 AM PDT     Moonrise
Thu -- 04:45 AM PDT     0.06 feet Low Tide
Thu -- 06:26 AM PDT     Sunrise
Thu -- 10:37 AM PDT     7.51 feet High Tide
Thu -- 04:26 PM PDT     2.47 feet Low Tide
Thu -- 04:42 PM PDT     Moonset
Thu -- 07:57 PM PDT     Sunset
Thu -- 09:30 PM PDT     10.84 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.54.42.51.10.20.10.92.44.36.17.37.56.85.74.33.22.52.74.26.6910.610.810

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
Thu -- 01:33 AM PDT     -1.30 knots Max Ebb
Thu -- 02:06 AM PDT     Moonrise
Thu -- 04:32 AM PDT     0.01 knots Slack
Thu -- 06:26 AM PDT     Sunrise
Thu -- 07:19 AM PDT     1.27 knots Max Flood
Thu -- 10:36 AM PDT     -0.00 knots Slack
Thu -- 02:13 PM PDT     -0.61 knots Max Ebb
Thu -- 04:21 PM PDT     0.00 knots Slack
Thu -- 04:42 PM PDT     Moonset
Thu -- 06:58 PM PDT     1.04 knots Max Flood
Thu -- 07:57 PM PDT     Sunset
Thu -- 09:53 PM PDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-1.1-1.3-1.2-0.9-0.40.411.31.20.90.4-0.1-0.4-0.5-0.6-0.5-0.20.40.910.90.5-0-0.5

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 (21,6,7,8)
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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.