Monday, June26, 2017 L-36.com


Marine Weather and Tides
Cupertino, 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 5:48AMSunset 8:34PM Monday June 26, 2017 8:40 PM PDT (03:40 UTC) Moonrise 7:49AMMoonset 9:56PM Illumination 10% Phase: Waxing Crescent; Moon at 3 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- 128 Pm Pdt Mon Jun 26 2017
.small craft advisory in effect until 9 pm pdt this evening...
.small craft advisory in effect from Tuesday afternoon through Tuesday evening...
Tonight..NW winds 15 to 25 kt...decreasing to 5 to 15 kt by midnight. Wind waves 3 to 5 ft. SWell sw 3 ft at 15 seconds.
Tue..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. Mixed swell nw 2 ft at 10 seconds and sw 3 to 4 ft at 14 seconds.
Tue night..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 2 ft at 9 seconds and sw 3 ft at 13 seconds. Patchy fog after midnight.
Wed..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 2 to 4 ft at 9 seconds. Patchy fog in the morning.
Wed night..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 4 to 6 ft at 9 seconds. Patchy fog after midnight.
Thu..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 4 to 6 ft. Patchy fog.
Fri..NW winds 10 to 20 kt. Wind waves 2 to 4 ft. NW swell 5 to 7 ft. Patchy fog.
Sat..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 4 to 6 ft. Patchy fog.
PZZ500 128 Pm Pdt Mon Jun 26 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... High pressure remains located over the eastern pacific. Locally gusty winds are forecast along the immediate coast and in san francisco bay today. A dominant southerly swell will persist into Wednesday morning.

7 Day Forecast for Marine Location Near Cupertino, CA
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location: 37.31, -122.06     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 262358
afdmtr
area forecast discussion
national weather service san francisco bay area
458 pm pdt Mon jun 26 2017

Synopsis Seasonably cool temperatures through midweek then
slight warming as a ridge builds Thursday and Friday. Slight
cooling back towards normal over the weekend as another weak
trough passes over the region. Dry weather the next 7 days with
night and morning coastal clouds followed by sunny afternoons.

Discussion As of 1:43 pm pdt Monday... Skies have turned mostly
sunny across the district with temperatures running in the upper
60s to 70s. The marine layer is poorly defined at around 2000 feet
with not too much warm air aloft. Northerly gradients from arcata
to sfo are nearly flat with 4mb from sfo to santa barbara.

Onshore gradients currently at 2.1 mb will ramp up this evening
with weak cool advection and a shortwave trough moving onshore
over oregon. This all sets the stage for a near or slightly below
normal temperature regime the next day or two. Some weak ridging
is forecast by Thursday which should allow inland temperatures to
nudge slightly warmer. However day to day changes will be subtle
but if anything should trend on the cool side of normal.

The 12z ECMWF brings another weak trough over northern california
Saturday that will keep onshore flow and seasonably cool temps in
place. Looking ahead to the 4th of july holiday the pattern looks
zonal Sunday through Monday then a trough may dig into the pacific
northwest but the end result for the bay area would likely mean
some dry north winds that could keep marine clouds to a minimum.

Were heading towards the peak of the summer doldrums here with no
precipitation in the forecast with the marine layer likely to set
up long term residence for july and august.

Aviation As of 4:47 pm pdt Monday... Clouds have cleared out
very nicely this afternoon making way for clear skies across the
region. Low clouds are anticipated to return tonight under a deep
2000+ ft marine layer. Brisk onshore flow will prevail through
this evening then gradually diminish overnight.

Moderate confidence with regard to the timing of the CIGS across
all terminals.

Vicinity of ksfo...VFR through this evening. MVFR CIGS returning
between 03z-07z tonight. CIGS may be in and out at first, have
included a tempo group to reflect this. CIGS will fill in for the
night after 07z and persist till around 18z Tuesday morning.

Moderate and gusty winds around 15 to 20 kt with gusts to around
25 kt expected through late tonight. Winds will ease overnight
then strengthen once again to around 15 kt with gusts to 25 kt after
21z Tuesday.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR through this evening. MVFR CIGS returning
between 03z-07z tonight. CIGS may be in and out at first, have
included a tempo group to reflect this. CIGS will fill in for the
night after 07z and persist till 17z-18z Tuesday morning.

West winds around 10 kt expected through late tonight. Winds will
ease overnight then strengthen once again to around 12-15 kt
after 19z-20z Tuesday.

Marine As of 1:28 pm pdt Monday... High pressure remains
located over the eastern pacific. Locally gusty winds are forecast
along the immediate coast and in san francisco bay today. A
dominant southerly swell will persist into Wednesday morning.

Mtr watches warnings advisories
Tngt Sca... Sf bay until 9 pm
sca... Mry bay until 9 pm
sca... Pigeon pt to pt pinos 0-10 nm until 9 pm
sca... Pt pinos to pt piedras blancas 0-10 nm
public forecast: rww
aviation: cw
marine: canepa
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 16 mi41 min W 13 G 15 64°F 73°F1015.1 hPa (-0.0)
AAMC1 - 9414750 - Alameda, CA 34 mi41 min W 8 G 14 64°F 69°F1015.8 hPa (-0.5)
LNDC1 36 mi41 min W 9.9 G 14 64°F 1015.2 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 37 mi41 min W 19 G 22
OBXC1 37 mi41 min 61°F 57°F
PXSC1 38 mi41 min 62°F 56°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 38 mi41 min W 11 G 17 62°F 1014.4 hPa (-0.5)
OKXC1 - 9414776 - Oakland (Berth 34), CA 38 mi41 min W 16 G 20 62°F 1015.2 hPa (-0.5)
ELXC1 - Elkhorn Slough Reserve, CA 38 mi56 min SW 8 64°F 1015 hPa57°F
46092 - MBM1 39 mi94 min WSW 14 60°F 57°F1014.2 hPa (-1.1)
FTPC1 - 9414290 - San Francisco, CA 40 mi41 min WSW 9.9 G 17 60°F 59°F1015.9 hPa (-0.7)
46042 - MONTEREY - 27NM West of Monterey Bay, CA 41 mi51 min 61°F 61°F3 ft1015.7 hPa (-0.5)
46114 - West Monterey Bay, CA 43 mi41 min 60°F4 ft
PPXC1 - 9414847 - Richmond (Point Potrero), CA 44 mi41 min WSW 6 G 8.9 67°F 1015.3 hPa (-0.5)
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 44 mi51 min NW 5.8 G 5.8 60°F 59°F3 ft1015.8 hPa (-0.8)
46237 - San Francisco Bar, CA (142) 45 mi41 min 58°F3 ft
TIBC1 - Tiburon Pier, San Francisco Bay, CA 45 mi49 min Calm 64°F 1015 hPa (-1.0)
RCMC1 - 9414863 - Richmond, CA 46 mi41 min NW 8.9 G 12 65°F 64°F1014.8 hPa (-0.5)
46240 - Cabrillo Point, Monterey Bay, CA (158) 48 mi50 min 58°F2 ft

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Mountain View, Moffett Field, CA8 mi1.7 hrsNNW 1510.00 miFair70°F57°F66%1015.5 hPa
San Jose, San Jose International Airport, CA8 mi48 minNW 1410.00 miA Few Clouds68°F57°F68%1015.2 hPa
Palo Alto Airport, CA12 mi1.9 hrsNNW 2010.00 miClear and Breezy70°F59°F69%1014.9 hPa
San Jose / Reid / Hillv, CA13 mi54 minNW 1210.00 miClear70°F55°F60%1015.9 hPa
San Carlos Airport, CA18 mi54 minWSW 910.00 miA Few Clouds66°F55°F68%1015.9 hPa
Hayward, Hayward Air Terminal, CA24 mi47 minWNW 1310.00 miFair66°F53°F63%1016.3 hPa

Wind History from NUQ (wind in knots)
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Last 24hrN9W3CalmCalmCalmNW3NW5NW7NW4NW43SW3CalmN7N6N10N11N13N16N17N18
G22
N15N15NW8
1 day agoN8N8N8N8N8NE6NE6NE6N4N6CalmNW4N4N4N5N8N11N13
G18
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G18
N12N14N14N15N10
2 days agoNW6NW6N9--N8N7N6N4NW4E3N3N4N73N4N4N8N10N12N10NW8N12N13
G18
N12

Tide / Current Tables for Upper Guadalupe Slough, San Francisco Bay, California
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Upper Guadalupe Slough
Click for Map
Mon -- 02:26 AM PDT     11.03 feet High Tide
Mon -- 05:48 AM PDT     Sunrise
Mon -- 08:48 AM PDT     Moonrise
Mon -- 10:09 AM PDT     -1.74 feet Low Tide
Mon -- 04:27 PM PDT     8.83 feet High Tide
Mon -- 08:32 PM PDT     Sunset
Mon -- 10:18 PM PDT     2.67 feet Low Tide
Mon -- 10:56 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
79.310.810.99.985.52.80.5-1.1-1.7-1.20.42.75.27.48.78.77.86.24.63.32.73

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 -- 02:41 AM PDT     -0.00 knots Slack
Mon -- 05:49 AM PDT     Sunrise
Mon -- 07:27 AM PDT     -1.74 knots Max Ebb
Mon -- 08:48 AM PDT     Moonrise
Mon -- 10:08 AM PDT     0.00 knots Slack
Mon -- 12:55 PM PDT     1.83 knots Max Flood
Mon -- 04:22 PM PDT     -0.01 knots Slack
Mon -- 08:07 PM PDT     -0.89 knots Max Ebb
Mon -- 08:33 PM PDT     Sunset
Mon -- 10:12 PM PDT     0.01 knots Slack
Mon -- 10:56 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.31.10.5-0.1-0.6-1.1-1.5-1.7-1.6-1-0.10.91.61.81.61.10.3-0.3-0.6-0.8-0.9-0.7-0.10.6

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 (23,6,7,8)
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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.