Thursday, June29, 2017 L-36.com


Marine Weather and Tides
Millbrae, 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 5:50AMSunset 8:36PM Thursday June 29, 2017 8:54 AM PDT (15:54 UTC) Moonrise 11:03AMMoonset 11:49PM Illumination 30% Phase: Waxing Crescent; Moon at 6 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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PZZ545 Point Reyes To Pigeon Point To 10 Nm- 845 Am Pdt Thu Jun 29 2017
.small craft advisory in effect through Saturday morning...
Today..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 4 to 6 ft at 9 seconds. Patchy fog late in the morning.
Tonight..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 6 to 8 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 7 ft at 10 seconds. Patchy fog in the morning.
Fri night..NW winds 20 to 30 kt. Wind waves 4 to 6 ft. NW swell 7 to 9 ft at 10 seconds. Patchy fog after midnight.
Sat..NW winds 20 to 30 kt. Wind waves 4 to 6 ft. NW swell 7 to 9 ft at 11 seconds. Patchy fog.
Sun..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 5 to 7 ft. Patchy fog.
Mon..SW winds 5 to 15 kt. Wind waves 1 to 3 ft...becoming 2 ft or less. NW swell 5 to 7 ft.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...combined seas 4 to 6 ft with a dominant swell period of 9 seconds. Across the bar...combined seas 5 to 7 ft with a dominant swell period of 9 seconds. Maximum ebb current of 1.1 knots at 08:54 pm Thursday and 1.2 knots at 07:54 am Friday.
PZZ500 845 Am Pdt Thu Jun 29 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Moderate to strong northerly winds will continue over the coastal waters as high pressure remains in place. 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 Millbrae, CA
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location: 37.58, -122.39     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 291143
afdmtr
area forecast discussion
national weather service san francisco bay area
443 am pdt Thu jun 29 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. These conditions
are expected to continue through the 4th of july holiday.

Discussion As of 2:08 am pdt Thursday... Satellite imagery
shows low clouds have spread into the salinas valley as well as
across the san francisco bay to the east bay hills, with less
coverage over the north bay except for marin county. The marine
layer depth has compressed somewhat and is now around 1100 feet
per the fort ord profiler, but low clouds and fog are still
expected to form even in the north bay valleys by sunrise. Onshore
flow is still strong, with 3.3 mb between sfo and sac last hour.

An upper level trough remains over the great basin with high
pressure aloft over the eastern pacific. This ridge is forecast to
build in over california over the next couple of days resulting in
a slight warming trend, especially across inland areas where high
temperatures will once again approach 100 degrees in the warmest
locations. There will be a steep temperature gradient to the coast
where 60s to lower 70s will be the rule through the forecast
period, with continued marine influence.

An upper level trough is progged to approach the coast by the end
of the week which will deepen the marine layer and increase
onshore flow. Thus, cooler temperatures will filter inland as
well.

By early next week, the upper level high will center over the
desert southwest. Differences in model output regarding the
position of this ridge mean either high temperatures warm once
again across our southern inland areas, or if the ridge remains
farther east, continued seasonable weather. The latest ECMWF still
keeps the ridge farther east with a deepening trough off the
coast. The current forecast trend is more in line with this
solution.

Aviation As of 04:35 am pdt Thursday... For 12z tafs. Marine
layer compressed a little overnight and stratus coverage isn't as
much this morning. However, stratus is still slowly expanding.

Given the compressed nature will go with better burn off chance
this morning.VFR this afternoon. Onshore flow could be a tad
stronger today, especially at sfo.

Moderate confidence.

Vicinity of ksfo... MVFR cigs. Tricky for sfo and oak as satellite
shows edge of stratus deck is on the edge of both terminals and
moving north. Given the low conf will keep CIGS through early this
am. May need to amend if the clearing line moves completely
through terminals.VFR this afternoon. Moderate west winds around
10 to 15 kt increasing to 20 kt with poss gust to 30 kt.

Sfo bridge approach... Latest satellite and smb obs show clear over
approach. May see a few clouds creep in form the S and se.

Monterey bay terminals... Ifr CIGS through 18z-19z Thursday
morning.

Marine As of 04:34 am pdt Thursday... Moderate to strong
northerly winds will continue over the coastal waters as high
pressure remains in place. 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
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... Mry bay from 3 pm
sca... Sf bay
public forecast: sims
aviation: mm
marine: mm
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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 mi54 min WNW 5.1 G 7 58°F 71°F1014.8 hPa (+1.2)
AAMC1 - 9414750 - Alameda, CA 14 mi54 min WSW 6 G 12 55°F 66°F1015.9 hPa (+1.4)
PXOC1 - 9414311 - San Francisco (Pier 1), CA 15 mi60 min WSW 5.1 G 8.9 54°F 1014.2 hPa
PXSC1 15 mi54 min 55°F 52°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 16 mi54 min SW 7 G 9.9 55°F 1015.4 hPa (+1.4)
OBXC1 16 mi54 min 55°F 53°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 16 mi54 min SSW 8.9 G 12
FTPC1 - 9414290 - San Francisco, CA 16 mi54 min SW 5.1 G 9.9 53°F 57°F1015.4 hPa (+1.3)
LNDC1 16 mi54 min SSW 8 G 9.9 55°F 1015.4 hPa (+1.4)
46237 - San Francisco Bar, CA (142) 19 mi54 min 57°F5 ft
TIBC1 - Tiburon Pier, San Francisco Bay, CA 22 mi52 min S 7 53°F 1015 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 23 mi54 min S 13 G 17 55°F 1015.3 hPa (+1.4)
RCMC1 - 9414863 - Richmond, CA 24 mi54 min S 8 G 12 55°F 63°F1014.7 hPa (+1.3)
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 27 mi64 min NW 14 G 18 53°F 55°F7 ft1015.1 hPa (+1.6)
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 30 mi64 min WNW 16 G 19 55°F 55°F7 ft1015.3 hPa (+1.3)
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 34 mi54 min SW 12 G 15 58°F 1013.9 hPa (+1.4)
MZXC1 - 9415102 - Martinez-Amorco CA 34 mi54 min W 6 G 8.9 60°F 68°F1014.2 hPa (+1.3)54°F
UPBC1 35 mi54 min W 7 G 9.9
PCOC1 - 9415144 - Port Chicago, CA 38 mi54 min WSW 8 G 9.9 60°F 69°F1013.8 hPa (+1.5)
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 41 mi54 min WNW 8.9 G 12 63°F 1012.8 hPa (+1.4)
PRYC1 - 9415020 - Point Reyes, CA 42 mi54 min WNW 15 G 19 54°F 52°F1014.5 hPa (+1.5)
SFXC1 - San Francisco Bay Reserve, CA 47 mi69 min WNW 11 58°F 1013 hPa55°F

Wind History for Redwood City, CA
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Francisco, San Francisco International Airport, CA3 mi2 hrsWSW 89.00 miMostly Cloudy56°F50°F81%1014.9 hPa
Half Moon Bay Airport, CA8 mi59 minWNW 53.00 miFog/Mist55°F51°F88%1015.9 hPa
San Carlos Airport, CA8 mi67 minWSW 1010.00 miPartly Cloudy59°F50°F72%1015.6 hPa
Oakland, Metro Oakland International Airport, CA12 mi61 minWSW 107.00 miOvercast58°F53°F84%1015.5 hPa
Hayward, Hayward Air Terminal, CA15 mi60 minWNW 79.00 miOvercast60°F50°F70%1016.2 hPa
Palo Alto Airport, CA16 mi2.1 hrsSE 67.00 miMostly Cloudy59°F55°F88%1014.6 hPa
Mountain View, Moffett Field, CA21 mi2 hrsESE 49.00 miOvercast60°F54°F80%1015 hPa

Wind History from SFO (wind in knots)
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1 day agoW11W13W15
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2 days agoW9W11W11W15
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Tide / Current Tables for Coyote Point Marina, San Francisco Bay, California
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Coyote Point Marina
Click for Map
Thu -- 12:15 AM PDT     Moonset
Thu -- 04:47 AM PDT     6.54 feet High Tide
Thu -- 05:50 AM PDT     Sunrise
Thu -- 11:29 AM PDT     -0.18 feet Low Tide
Thu -- 12:03 PM PDT     Moonrise
Thu -- 06:17 PM PDT     7.14 feet High Tide
Thu -- 08:34 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.43.34.45.66.36.564.83.31.80.6-0.1-0.10.723.65.26.57.176.14.93.62.6

Tide / Current Tables for Oyster Point 2.8 mi E, South San Francisco Bay, California Current
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Oyster Point 2.8 mi E
Click for Map
Thu -- 12:15 AM PDT     Moonset
Thu -- 02:25 AM PDT     0.70 knots Max Flood
Thu -- 05:18 AM PDT     -0.00 knots Slack
Thu -- 05:50 AM PDT     Sunrise
Thu -- 08:47 AM PDT     -1.54 knots Max Ebb
Thu -- 12:03 PM PDT     Moonrise
Thu -- 12:04 PM PDT     0.00 knots Slack
Thu -- 03:16 PM PDT     1.01 knots Max Flood
Thu -- 06:37 PM PDT     -0.01 knots Slack
Thu -- 08:34 PM PDT     Sunset
Thu -- 09:37 PM PDT     -1.09 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.10.50.70.70.50.1-0.4-1-1.4-1.5-1.2-0.7-0.10.50.8110.70.3-0.2-0.8-1.1-1.1-0.9

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 (11,2,3,4)
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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.