Tuesday, June27, 2017 L-36.com


Marine Weather and Tides
Colma, 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 8:36PM Tuesday June 27, 2017 10:28 AM PDT (17:28 UTC) Moonrise 8:56AMMoonset 10:39PM Illumination 14% Phase: Waxing Crescent; Moon at 4 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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PZZ531 San Francisco Bay South Of The Bay Bridge- 831 Am Pdt Tue Jun 27 2017
.small craft advisory in effect from 1 pm pdt this afternoon through this evening...
Today..W winds 10 kt...increasing to 15 to 25 kt in the afternoon.
Tonight..W winds 10 to 20 kt...decreasing to 10 kt after midnight. Patchy fog after midnight.
Wed..W winds 10 kt...increasing to 10 to 20 kt in the afternoon. Patchy fog in the morning.
Wed night..W winds 5 to 15 kt. Patchy fog after midnight.
Thu..W winds 10 to 20 kt. Patchy fog in the morning. Patchy fog after midnight.
Fri..SW winds 5 to 15 kt. Patchy fog.
Sat..SW winds 10 kt. Patchy fog.
PZZ500 831 Am Pdt Tue Jun 27 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Northerly winds will continue to increase over the waters and bays, especially the near-coast waters, today as high pressure remains over the eastern pacific. Winds will increase over all waters on Wednesday. A dominant southerly swell will persist into Wednesday morning.

7 Day Forecast for Marine Location Near Colma, CA
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location: 37.68, -122.42     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 271517
afdmtr
area forecast discussion
national weather service san francisco bay area
817 am pdt Tue jun 27 2017

Synopsis Seasonably cool temperatures can be expected today
with a very gradual warming trend through Friday as a ridge
builds into our region. Outside of drizzle, dry weather the next
7 days with night and morning coastal clouds followed by sunny
afternoons is forecast.

Discussion As of 08:17 am pdt Tuesday... Another morning of
june gloom for many as overcast skies blanket much of the area
thanks to the deep marine layer. Experimental and non-operational
goes-16 shows the clouds spreading far into the salinas valley and
into san luis obispo county at sunrise. Do expect the clouds to
clear by mid late morning for most locations. Morning temperatures
are running about 2 to 5 degrees cooler than they were at this
time Monday and expect the trend to translate over to the
afternoon hours as well. Made minor changes to the sky cover grids
based on current trends; otherwise the current forecast is on
track. Please refer to previous discussion for additional details.

Prev discussion As of 3:00 am pdt Tuesday... For those who enjoyed
yesterday, today will be very similar. Satellite imagery shows
widespread clouds over the waters with patchy clouds inland. Would
expect the extent of clouds to increase over the next few hours
along with possible drizzle and fog. Synoptically a deep marine
layer combined with a weak onshore flow and zonal flow aloft will
lead to another day of 60s to lower 70s at the coast with 70s to
the mid 80s inland. Westerly to northwesterly sea breezes will
kick in during the afternoon and evening with local gusts over 20
mph likely. Higher speeds can be expected over ridgetops plus
down the salinas valley. Another round of patchy fog and drizzle
are forecast for tonight.

Starting on Wednesday temperatures will slowly warm through the
remainder of the work week as a ridge of high pressure rebuilds
toward our region. The warming will fall well short of last week
with inland highs will peak in the 80s to lower 90s instead of
the mid 90s to 105 that were hit last week. Coastal areas will
only see minor warming -- 60s and 70s.

Longer range guidance for next week favors temperatures near to a
bit above normal with continued dry conditions.

Aviation As of 04:24 am pdt Tuesday... Non-uniform marine layer
did re-develop overnight, but is patchy is some locations. All
terminals at least have some CIGS from MVFR to ifr. Based on
guidance and burn off from yesterday will aim for mid morning
17-18z.VFR this afternoon. CIGS return tonight.

Moderate confidence.

Vicinity of ksfo... Ifr CIGS through about 18z. Westerly winds
increasing to 20 kt this afternoon. Will have to monitor a
potential hole in the stratus deck N of the airport.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Ifr CIGS through 17-18z. Gusty west winds
12-14kt this afternoon.

Marine As of 04:22 am pdt Tuesday... Moderate to locally strong
northerly winds will continue over the waters as high pressure
remains over the eastern pacific. Winds will increase over all
waters on Wednesday. A dominant southerly swell will persist into
Wednesday morning.

Mtr watches warnings advisories
Tday Sca... Mry bay from 12 pm
sca... Pigeon pt to pt pinos 0-10 nm from 12 pm
sca... Pt arena to pt reyes 0-10 nm from 3 pm
sca... Pt arena to pigeon pt 10-60 nm from 3 pm
sca... Pt pinos to pt piedras blancas 0-10 nm
sca... Sf bay from 1 pm
public forecast: rowe bell
aviation: mm
marine: mm
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PXOC1 - 9414311 - San Francisco (Pier 1), CA 8 mi40 min W 5.1 G 9.9 58°F 1014.3 hPa
FTPC1 - 9414290 - San Francisco, CA 9 mi40 min W 8.9 G 13 57°F 60°F1015.6 hPa
PXSC1 9 mi40 min 59°F 56°F
AAMC1 - 9414750 - Alameda, CA 9 mi40 min W 4.1 G 7 60°F 67°F1015.9 hPa
OBXC1 10 mi40 min 58°F 56°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 10 mi40 min W 8.9 G 11 59°F 1015.4 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 10 mi40 min W 8.9 G 12
LNDC1 11 mi40 min WSW 7 G 8.9 59°F 1015.3 hPa
46237 - San Francisco Bar, CA (142) 14 mi58 min 58°F4 ft
TIBC1 - Tiburon Pier, San Francisco Bay, CA 15 mi51 min SSE 8 60°F 1015 hPa
RTYC1 - 9414523 - Redwood City, CA 16 mi40 min WSW 2.9 G 5.1 62°F 72°F1015.1 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 16 mi40 min S 8 G 8.9 62°F 1015.3 hPa
RCMC1 - 9414863 - Richmond, CA 17 mi40 min SSE 5.1 G 7 61°F 62°F1014.8 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 23 mi38 min NW 16 G 18 55°F 57°F4 ft1015.8 hPa (+0.7)
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 27 mi40 min W 7 G 9.9 62°F 1014.5 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 29 mi40 min W 7 G 11 63°F 69°F1014.7 hPa59°F
UPBC1 29 mi46 min W 8 G 12
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 33 mi38 min NW 9.7 G 9.7 56°F 57°F4 ft1015.8 hPa (+0.5)
PCOC1 - 9415144 - Port Chicago, CA 33 mi40 min W 12 G 15 63°F 69°F1014.2 hPa
PRYC1 - 9415020 - Point Reyes, CA 37 mi40 min W 16 G 21 58°F 56°F1015.4 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 38 mi40 min W 7 G 12 67°F 1013.6 hPa
SFXC1 - San Francisco Bay Reserve, CA 42 mi103 min W 11 62°F 1014 hPa57°F

Wind History for Alameda, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Francisco, San Francisco International Airport, CA5 mi92 minW 119.00 miOvercast58°F54°F87%1015.5 hPa
Oakland, Metro Oakland International Airport, CA11 mi35 minW 910.00 miOvercast62°F55°F80%1015.5 hPa
Half Moon Bay Airport, CA12 mi33 minNW 910.00 miMostly Cloudy59°F57°F94%1016.3 hPa
San Carlos Airport, CA14 mi39 minN 010.00 miMostly Cloudy64°F55°F73%1015.9 hPa
Hayward, Hayward Air Terminal, CA16 mi34 minW 710.00 miOvercast62°F52°F70%1016.5 hPa
Palo Alto Airport, CA21 mi41 minVar 610.00 miPartly Cloudy66°F59°F78%1015.6 hPa

Wind History from SFO (wind in knots)
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1 day agoW17W15W17W18W19W18W21W18W17
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2 days agoNW15NW15NW15NW20NW20
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Tide / Current Tables for South San Francisco, San Francisco Bay, California
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South San Francisco
Click for Map
Tue -- 02:42 AM PDT     7.43 feet High Tide
Tue -- 05:50 AM PDT     Sunrise
Tue -- 09:41 AM PDT     -1.14 feet Low Tide
Tue -- 09:56 AM PDT     Moonrise
Tue -- 04:41 PM PDT     6.59 feet High Tide
Tue -- 08:35 PM PDT     Sunset
Tue -- 10:04 PM PDT     2.35 feet Low Tide
Tue -- 11:39 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
56.37.27.46.85.43.61.6-0-1-1.1-0.50.82.345.56.46.55.94.83.62.72.42.7

Tide / Current Tables for Sierra Point 1.3 mi ENE, South San Francisco Bay, California Current
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Sierra Point 1.3 mi ENE
Click for Map
Tue -- 12:14 AM PDT     0.92 knots Max Flood
Tue -- 03:09 AM PDT     -0.01 knots Slack
Tue -- 05:49 AM PDT     Sunrise
Tue -- 06:40 AM PDT     -1.58 knots Max Ebb
Tue -- 09:56 AM PDT     Moonrise
Tue -- 10:03 AM PDT     0.01 knots Slack
Tue -- 01:17 PM PDT     1.26 knots Max Flood
Tue -- 04:45 PM PDT     -0.00 knots Slack
Tue -- 07:22 PM PDT     -0.86 knots Max Ebb
Tue -- 08:35 PM PDT     Sunset
Tue -- 10:18 PM PDT     0.01 knots Slack
Tue -- 11:39 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.90.80.60.1-0.5-1.1-1.5-1.6-1.2-0.7-00.611.31.20.90.5-0.1-0.6-0.8-0.8-0.5-0.10.3

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 (13,3,4,5)
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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.