Tuesday, January16, 2018 L-36.com


Marine Weather and Tides
Brisbane, 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 7:21AMSunset 5:18PM Tuesday January 16, 2018 11:11 AM PST (19:11 UTC) Moonrise 7:01AMMoonset 5:13PM Illumination 0% Phase: New Moon; Moon at 29 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- 900 Am Pst Tue Jan 16 2018
Today..SE winds 5 kt...becoming nw in the afternoon. Chance of rain in the morning.
Tonight..N winds 10 kt.
Wed..E winds 5 kt...becoming nw in the afternoon.
Wed night..SW winds 10 kt.
Thu..S winds 5 to 15 kt...becoming w. Chance of rain, then chance of showers.
Fri..W winds 5 to 15 kt. Chance of showers, then slight chance of showers.
Sat..W winds 10 kt.
PZZ500 900 Am Pst Tue Jan 16 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Light to moderate winds will prevail today as high pressure remains off the coast. Winds will switch southerly late tonight and Wednesday as a low pressure system develops off the british columbia coast and pushes the high south. Large swells will impact the beaches through early tonight before decreasing. A larger swell with long period will arrive Thursday.

7 Day Forecast for Marine Location Near Brisbane, CA
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location: 37.67, -122.38     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 161746
afdmtr
area forecast discussion
national weather service san francisco bay area
946 am pst Tue jan 16 2018

Synopsis A few lingering showers this morning otherwise dry but
continued cloudy today. Dry and continued mostly cloudy Wednesday
as moist flow comes in off the pacific. Next front moves in
Thursday with rain spreading north to south across the district
reaching the central coast by Thursday night. Precip will turn
showery later Thursday night into Friday as the cold upper trough
passes over the region with one of the colder airmass so far this
season. Dry but cool on Saturday before clouds increase again on
Sunday as the next front arrives with rain later Sunday into
Monday.

Discussion As of 09:02 am pst Tuesday... A dissipating system
that moved through the region overnight resulted in some light
rainfall in the north bay with only a few hundredths in the city
of san francisco and as far south as the santa cruz mountains.

Inland and to the south, only trace amounts or no precipitation at
all reported. With many locations in the north bay and east bay
still reporting a few hundredths of an inch or so per hour, will
keep a slight chance of showers in the forecast through the next
few hours. However, looking to a drying trend region-wide late
this morning into the afternoon. No other updates are needed at
this time with today being mostly cloudy along with temperatures
in the 50s to 60s region-wide. Please see the previous forecast
discussion below for additional details.

Prev discussion As of 3:38 am pst Tuesday... Radar still
picking up returns over bay area but most activity will be east of
the area by rush hour sunrise. Coastal sonoma county had a few
sites report upwards of half an inch at sea ranch on the coast and
the oak ridge raws located in the wet coastal hills. Most other
locations are reporting only a few hundredths with little or no
rain south of about the dumbarton bridge. So by the time most
people start the day any precip will have ended. However a moist
zonal flow is set up across the pacific and clouds will continue
to stream across the region today keeping daytime highs stuck
around 60.

No changes of note for weds with a forecast of partly mostly
cloudy skies but continued dry and seasonably mild with highs
upper 50s to upper 60s.

The next front of interest is due to arrive later Thursday. The
models have been remarkably consistent with the timing and
intensity of this system, even beyond 240 hour forecasts! High
confidence that a well organized frontal boundary will move into
the north bay Thursday morning and then charge southward through
the bay area and reach the central coast by Thursday evening. The
fast moving nature of the system will limit rainfall potential
with current QPF forecasts showing 0.25-0.75 on average. So this
looks like a typical moderate winter-time storm. Winds will
briefly gust to around 35 mph during frontal passage as rain
drags down higher momentum air. The fast nature of the frontal
passage and modest rain totals should preclude any significant
hydro issues outside of typical commute impacts and blocked storm
drains. As always will need to monitor for brief heavy rain-rates
over the north bay burn scars, as its often the short duration
bursts versus long term heavy rain that can cause debris flows.

Precip will turn showery later Thursday night into Friday morning
as 1000-500 mb thickness values plummet to around 528 dm with 850
mb temps to around -2 celsius suggesting we should see snow on the
higher peaks of the bay area. On Friday there will be numerous
post-frontal showers, especially for the coastal hills that
benefit from cold northwest wind flow. 700 mb temps as cold as -13
celsius with sea surface temps in the upper 50s will allow for big
delta t in the lower levels. This type of pattern can produce
locally heavy rain for the monterey coast and big sur hills where
the forecast will show accumulating snow above 3500 feet for any
hikers in the los padres forest. Daytime highs on Friday will
struggle to reach 55 for nearly all areas with periodic cold rain
showers dragging down cold air. Although not in the forecast at
this time, small hail and graupel will certainly be possible as
well.

After a cold start Saturday morning, the forecast to start the
weekend looks dry but continued cool.

Will be watching for the next system to arrive later Sunday into
Monday with another round of soaking rain forecast for the
district. Latest model trends suggest front will be fairly fast
moving and pass through sometime Sunday night. Earlier solutions
showed the boundary stalling but not seeing those signals at this
time. These systems have fairly cold air associated with them and
are progressive so hydro issues should be minimal with beneficial
rainfall the main impact.

Aviation As of 9:40 am pst Tuesday... Wide range of cat this
morning with ample low level moisture and passing showers - lifr
toVFR. Given recent trends, webcams and satellite decided to keep
more pessimistic forecast through this afternoon. Some of the
guidance keeps it an all day low cig event. Conf is low. Even if
there is some lifting later, CIGS and some br hz will likely
return tonight.

Overall conf is low to medium.

Vicinity of ksfo... MVFR CIGS through 20z with poss vsby at 5-6sm.

Cigs return tonight with some vsby again.

Sfo bridge approach... Same as ksfo.

Monterey bay terminals... Lingering fog around sns through 18-19z.

Will bring CIGS back tonight, but conf is low.

Marine As of 09:39 am pst Tuesday... Light to moderate winds
will prevail today as high pressure remains off the coast. Winds
will switch southerly late tonight and Wednesday as a low
pressure system develops off the british columbia coast and
pushes the high south. Large swells will impact the beaches
through early tonight before decreasing. A larger swell with long
period will arrive Thursday.

Mtr watches warnings advisories
Tday High surf advisory... Caz006-505-509-529-530
sca... Rough bar advisory for sf bar
public forecast: rgass rww
aviation: mm
marine: mm
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
AAMC1 - 9414750 - Alameda, CA 8 mi42 min NNW 5.1 G 7 56°F 54°F1024.3 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 9 mi42 min N 4.1 G 5.1 53°F 1023.2 hPa
PXSC1 9 mi42 min 55°F 55°F
OBXC1 9 mi42 min 54°F 54°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 9 mi42 min NNW 6 G 7
OKXC1 - 9414776 - Oakland (Berth 34), CA 10 mi42 min NNW 5.1 G 6 53°F 1024.4 hPa
FTPC1 - 9414290 - San Francisco, CA 10 mi42 min NNE 2.9 G 4.1 55°F 54°F1024.5 hPa
LNDC1 10 mi42 min NNW 5.1 G 5.1 56°F 1024.2 hPa
RTYC1 - 9414523 - Redwood City, CA 14 mi42 min NNE 1.9 G 2.9 58°F 55°F1024.5 hPa
46237 - San Francisco Bar, CA (142) 16 mi42 min 54°F10 ft
TIBC1 - Tiburon Pier, San Francisco Bay, CA 16 mi38 min NNW 4.1 53°F 1025 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 16 mi42 min N 1.9 G 4.1 58°F 1024.6 hPa
RCMC1 - 9414863 - Richmond, CA 18 mi42 min NW 5.1 G 6 53°F 53°F1024.1 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 25 mi82 min SSE 1.9 G 3.9 54°F 54°F10 ft1023.5 hPa (+1.6)
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 27 mi42 min E 8 G 9.9 53°F 1024.3 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 29 mi42 min ENE 2.9 G 4.1 52°F 52°F1024.9 hPa52°F
PCOC1 - 9415144 - Port Chicago, CA 32 mi42 min ENE 2.9 G 4.1 52°F 51°F1024.7 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 34 mi82 min S 1.9 G 3.9 56°F 56°F12 ft1023.1 hPa (+1.6)
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 37 mi42 min Calm G 1 53°F 1024.7 hPa
PRYC1 - 9415020 - Point Reyes, CA 39 mi42 min ESE 4.1 G 6 54°F1024.1 hPa
SFXC1 - San Francisco Bay Reserve, CA 41 mi87 min Calm 52°F 1024 hPa52°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, CA4 mi16 minN 58.00 miOvercast57°F53°F87%1024 hPa
Oakland, Metro Oakland International Airport, CA9 mi19 minN 06.00 miOvercast with Haze60°F55°F84%1024.3 hPa
San Carlos Airport, CA12 mi22 minVar 57.00 miMostly Cloudy with Haze57°F51°F82%1024 hPa
Half Moon Bay Airport, CA13 mi17 minW 50.75 miFog/Mist57°F57°F100%1023.4 hPa
Hayward, Hayward Air Terminal, CA14 mi18 minWNW 35.00 miA Few Clouds with Haze60°F51°F72%1025 hPa
Palo Alto Airport, CA19 mi25 minNNE 510.00 miMostly Cloudy57°F51°F82%1024.4 hPa
Mountain View, Moffett Field, CA24 mi76 minN 310.00 miPartly Cloudy57°F51°F81%1024.6 hPa

Wind History from SFO (wind in knots)
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Last 24hrNE4N5NE3NW5E5N3N3E4SE3E4NE4SE3E4CalmSE6SW3E3CalmCalmCalmNE4NE5N5N5
1 day agoSE5E3E3CalmNE4NE6NE4NE7SE3SE8SW4N5CalmCalmS3SE3SW3W3NE8N9S5CalmN5NE8
2 days agoSE9E7E7E5E5E4E7NE11E9E7NE6NE12E10E11E12E5E5S5E9E8SE5E5E5E5

Tide / Current Tables for Oyster Point Marina, San Francisco Bay, California
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Oyster Point Marina
Click for Map
Tue -- 12:37 AM PST     6.02 feet High Tide
Tue -- 05:40 AM PST     2.92 feet Low Tide
Tue -- 07:00 AM PST     Moonrise
Tue -- 07:23 AM PST     Sunrise
Tue -- 11:20 AM PST     7.34 feet High Tide
Tue -- 05:13 PM PST     Moonset
Tue -- 05:15 PM PST     Sunset
Tue -- 06:18 PM PST     New Moon
Tue -- 06:21 PM PST     -0.50 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.965.44.53.73.133.54.55.76.87.37.26.34.831.30.1-0.5-0.30.41.73.24.5

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 -- 12:37 AM PST     -0.01 knots Slack
Tue -- 03:02 AM PST     -0.60 knots Max Ebb
Tue -- 05:47 AM PST     0.00 knots Slack
Tue -- 07:00 AM PST     Moonrise
Tue -- 07:23 AM PST     Sunrise
Tue -- 08:44 AM PST     0.75 knots Max Flood
Tue -- 11:37 AM PST     -0.00 knots Slack
Tue -- 03:08 PM PST     -1.37 knots Max Ebb
Tue -- 05:13 PM PST     Moonset
Tue -- 05:15 PM PST     Sunset
Tue -- 06:18 PM PST     New Moon
Tue -- 06:41 PM PST     0.01 knots Slack
Tue -- 09:53 PM PST     1.03 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.3-0.2-0.5-0.6-0.5-0.30.10.40.70.70.60.3-0.2-0.7-1.2-1.4-1.3-0.9-0.40.20.7110.9

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 (14,3,4,5)
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Ground Weather Radar Station San Francisco Bay Area, CA
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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.