Wednesday, June28, 2017 L-36.com


Marine Weather and Tides
Los Altos Hills, 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 5:49AMSunset 8:34PM Wednesday June 28, 2017 6:56 PM PDT (01:56 UTC) Moonrise 10:01AMMoonset 11:15PM Illumination 25% Phase: Waxing Crescent; Moon at 5 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- 251 Pm Pdt Wed Jun 28 2017
.small craft advisory in effect through late Thursday night...
Tonight..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 5 to 6 ft at 9 seconds. Patchy fog after midnight.
Thu..NW winds 5 to 15 kt...increasing to 15 to 25 kt in the afternoon. Wind waves 3 to 5 ft. NW swell 4 to 5 ft at 10 seconds. Patchy fog in the morning.
Thu night..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 5 to 7 ft at 10 seconds. Patchy fog after midnight.
Fri..NW winds 20 to 30 kt. Wind waves 3 to 5 ft. NW swell 5 to 6 ft at 10 seconds. Patchy fog in the morning.
Fri night..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 7 to 8 ft at 10 seconds. Patchy fog after midnight.
Sat..NW winds 10 to 20 kt. Wind waves 2 to 4 ft. NW swell 6 to 8 ft. Patchy fog.
Sun..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 5 to 7 ft. Patchy fog.
Mon..SW winds 10 kt. Wind waves 2 ft or less. NW swell 4 to 6 ft.
PZZ500 251 Pm Pdt Wed Jun 28 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Building high pressure off the california coast will maintain strong and gusty northerly winds through the remainder of the week and into the upcoming weekend. Steep wind waves and fresh swell will dominate the coastal waters as a result of the strong winds. Persons operating small crafts should use extra caution along the central california coast and bays through at least the forthcoming weekend.

7 Day Forecast for Marine Location Near Los Altos Hills, CA
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location: 37.35, -122.18     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 290006
afdmtr
area forecast discussion
national weather service san francisco bay area
506 pm pdt Wed jun 28 2017

Synopsis Seasonable summer pattern in place with a marine layer
along the coast leading to areas of night and morning low clouds
followed by sunny afternoons away from the coast right through the
4th of july holiday.

Discussion As of 2:02 pm pdt Wednesday... Marine layer has
compressed slightly to just under 2000 feet along the coast.

Marine clouds have been stubborn to clear from pt reyes to san
mateo as well as around the south end of monterey bay with
persistent northwest winds. Current temperatures are running
seasonably cool with only mid 70s for the inland valleys.

In general high pressure will strengthen slightly tonight into
Thursday which should compress the marine layer and weaken onshore
flow. So if anything the inland valleys should notice a slight
warming trend through the end of the work week. As the marine
layer compresses nighttime fog may be dense at times near the
coast and coastal hills with early morning drizzle associated with
the night time marine intrusions.

The next upper trough arrives around 00z Saturday, which will
likely lead to a stronger seabreeze Friday evening with a
deepening of the marine layer. Latest 18z NAM actually spits out a
few hundredths of precip by 12z Saturday morning as a result of
local drizzle associated with a deep marine layer.

850 mb temps look to stay in the 21-24 celsius range though the
weekend and into early next week. So in what will likely be a long
holiday weekend for many people it looks like dry and seasonable
pattern with perhaps slight cooling trend towards july 4th. Quiet
summer pattern overall.

Aviation As of 4:47 am pdt Wednesday... For 00z tafs. A
strengthening northerly gradient is sweeping the low clouds from
the north coast this afternoon. Low clouds are expected to fill
back in overnight but maybe a tad later than what we saw last
night. The marine layer is currently around 1600 feet with little
change expected. A slightly shallower marine layer may keep
stratus from moving in as quickly as it did last night as well.

Moderate onshore flow around 10 to 15 kt will locally higher gusts
will prevail through the evening then ease overnight.

Moderate confidence.

Vicinity of ksfo...VFR conditions expected through 04z this
evening. MVFR CIGS will then move in under the 1600 ft inversion.

Cigs will lower to ifr around 800 feet after 09z tonight. Low
clouds will scatter out around 17z-18z Thursday morning. Moderate
west winds around 15 to 20 kt with gusts to around 25 kt will
continue through this evening then gradually diminish overnight.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... MVFR CIGS will quick lower to ifr around
700 ft after 01z this afternoon then to lifr overnight. Low
clouds will scatter out around 18z-21z Thursday morning. Moderate
west winds around 10 to 15 kt will ease to around 10 kt around
01z-03z this evening then gradually diminish overnight.

Marine As of 2:51 pm pdt Wednesday... Building high pressure
off the california coast will maintain strong and gusty northerly
winds through the remainder of the week and into the upcoming
weekend. Steep wind waves and fresh swell will dominate the
coastal waters as a result of the strong winds. Persons operating
small crafts should use extra caution along the central california
coast and bays through at least the forthcoming weekend.

Mtr watches warnings advisories
Tngt Sca... Pigeon pt to pt pinos 0-10 nm
sca... Pt arena to pt reyes 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... Pt reyes to pigeon pt 0-10 nm until 3 am
sca... Sf bay until 9 pm
sca... Mry bay until 9 pm
public forecast: rww
aviation: cw
marine: bam
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 11 mi38 min WNW 9.9 G 13 66°F 72°F1012.1 hPa
AAMC1 - 9414750 - Alameda, CA 30 mi38 min WSW 6 G 9.9 60°F 65°F1013.5 hPa
LNDC1 31 mi38 min W 6 G 11 60°F 1013 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 32 mi38 min WSW 9.9 G 12
OBXC1 33 mi38 min 60°F 55°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 33 mi38 min SW 7 G 13 60°F 1011.8 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 33 mi38 min WNW 2.9 G 5.1 61°F 1013 hPa
PXSC1 33 mi38 min 61°F 54°F
FTPC1 - 9414290 - San Francisco, CA 35 mi38 min WSW 9.9 G 17
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 37 mi66 min WNW 12 G 14 57°F 56°F7 ft1013.8 hPa (-1.0)
46237 - San Francisco Bar, CA (142) 39 mi56 min 57°F5 ft
PPXC1 - 9414847 - Richmond (Point Potrero), CA 40 mi38 min S 13 G 16 61°F 1012.4 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 40 mi49 min NW 5.1 64°F 1012 hPa
46042 - MONTEREY - 27NM West of Monterey Bay, CA 41 mi66 min 57°F 59°F7 ft1013.4 hPa (-1.1)
RCMC1 - 9414863 - Richmond, CA 41 mi38 min S 7 G 11
46092 - MBM1 42 mi49 min W 18 55°F 55°F1012.1 hPa (-1.0)
46114 - West Monterey Bay, CA 44 mi26 min 56°F7 ft
ELXC1 - Elkhorn Slough Reserve, CA 44 mi71 min W 5.1 62°F 1013 hPa55°F
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 45 mi66 min WNW 14 G 16 56°F 56°F6 ft1013.5 hPa (-1.0)
MZXC1 - 9415102 - Martinez-Amorco CA 47 mi38 min W 12 G 13 73°F 70°F1011.2 hPa55°F
UPBC1 48 mi44 min W 15 G 18
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 49 mi38 min SW 12 G 15 67°F 1011 hPa
PCOC1 - 9415144 - Port Chicago, CA 49 mi38 min WSW 13 G 17 74°F 72°F1010.7 hPa

Wind History for Redwood City, CA
(wind in knots)    EDIT      (on/off)   Help
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W18
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G12
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W13
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W6
G9
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W17
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G9
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G16
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G20
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G17

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Mountain View, Moffett Field, CA9 mi60 minNNW 1410.00 miFair67°F57°F71%1013.2 hPa
Palo Alto Airport, CA10 mi69 minN 1510.00 miClear68°F60°F78%1012.5 hPa
San Carlos Airport, CA13 mi69 minW 1210.00 miA Few Clouds68°F50°F53%1012.9 hPa
San Jose, San Jose International Airport, CA13 mi63 minWNW 1110.00 miFair71°F57°F63%1012.3 hPa
San Jose / Reid / Hillv, CA19 mi2 hrsNW 810.00 miClear75°F55°F50%1012.9 hPa
Half Moon Bay Airport, CA20 mi61 minWNW 75.00 miFog/Mist57°F53°F88%1014.6 hPa
San Francisco, San Francisco International Airport, CA21 mi60 minWNW 1110.00 miA Few Clouds62°F51°F67%1013 hPa
Hayward, Hayward Air Terminal, CA22 mi62 minWNW 910.00 miFair65°F51°F61%1013.9 hPa
Oakland, Metro Oakland International Airport, CA24 mi63 minW 1310.00 miA Few Clouds64°F54°F70%1013.1 hPa

Wind History from NUQ (wind in knots)
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Last 24hrN11N9N5N8W3CalmNW4NW4NW4CalmCalmCalmNW4CalmCalmN7N6N8N11N12N13N14
G19
N15
G19
N14
1 day agoN15NW8NW9NW10NW6N6NW53W4NW3NW4NW5NW5W45N5N7N11NW11N15N17N17N13N15
2 days agoN15N10N9W3CalmCalmCalmNW3NW5NW7NW4NW43SW3CalmN7N6N10N11N13N16N17N18
G22
N15

Tide / Current Tables for Palo Alto Yacht Harbor, California
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Palo Alto Yacht Harbor
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Wed -- 04:23 AM PDT     8.27 feet High Tide
Wed -- 05:50 AM PDT     Sunrise
Wed -- 11:00 AM PDT     Moonrise
Wed -- 11:41 AM PDT     -0.53 feet Low Tide
Wed -- 05:40 PM PDT     7.57 feet High Tide
Wed -- 08:33 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.73.75.57.28.28.175.43.720.6-0.3-0.50.42.24.46.37.47.576.25.243

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
Wed -- 01:38 AM PDT     1.09 knots Max Flood
Wed -- 04:30 AM PDT     -0.01 knots Slack
Wed -- 05:49 AM PDT     Sunrise
Wed -- 09:07 AM PDT     -1.38 knots Max Ebb
Wed -- 10:59 AM PDT     Moonrise
Wed -- 11:49 AM PDT     0.01 knots Slack
Wed -- 02:36 PM PDT     1.52 knots Max Flood
Wed -- 06:00 PM PDT     -0.00 knots Slack
Wed -- 08:33 PM PDT     Sunset
Wed -- 09:52 PM PDT     -0.83 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.511.10.80.3-0.2-0.6-1-1.3-1.4-1.2-0.60.211.41.51.30.70-0.4-0.6-0.8-0.8-0.6

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 (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.