Sunday, April23, 2017 L-36.com


Marine Weather and Tides
Albany, CA

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:19AMSunset 7:54PM Sunday April 23, 2017 12:43 PM PDT (19:43 UTC) Moonrise 3:54AMMoonset 3:55PM Illumination 6% Phase: Waning Crescent; Moon at 27 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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PZZ530 San Pablo Bay Suisun Bay The West Delta And San Francisco Bay North Of The Bay Bridge- 830 Am Pdt Sun Apr 23 2017
.small craft advisory in effect from 3 pm pdt this afternoon through late tonight...
Today..W winds 5 to 15 kt.
Tonight..W winds 15 to 25 kt.
Mon..W winds 10 to 20 kt. Slight chance of rain through the day.
Mon night..W winds 5 to 15 kt. Slight chance of rain.
Tue..W winds 10 kt. Slight chance of rain.
Wed..W winds 10 kt...increasing to 10 to 20 kt.
Thu..NW winds 10 to 20 kt.
PZZ500 830 Am Pdt Sun Apr 23 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Look for moderate northwesterly winds to continue through the forecast period with the highest speeds near the coast. Winds and seas will dramatically increase by Thursday as the surface pressure gradient tightens along the california coast.

7 Day Forecast for Marine Location Near Albany, CA
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location: 37.86, -122.37     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 231613
afdmtr
area forecast discussion
national weather service san francisco bay area
913 am pdt Sun apr 23 2017

Synopsis Dry and seasonably cool conditions are forecast today.

Unsettled weather is expected during the first half of the work week,
with periodic rain chances across mainly the northern portion of
our area. Dry weather will return to all areas by Thursday, with
warmer temperatures anticipated from Friday into next weekend.

Discussion As of 9:13 am pdt Sunday... Skies are quickly
turning mostly sunny this morning with temperatures to warm into
the 60s and lower 70s for this afternoon. Onshore gradients are
ramping up with 2.1 mb from sfo to sac. This will keep a fresh
breeze blowing off the ocean today keeping any nearshore warming
in check this afternoon.

The next late season front will approach far northern california
by late tonight. The incoming cold front will bring light rain into
northern sonoma county as early as 15z Monday morning. Then by
midday and through the afternoon some light rain will be possible
from the golden gate southward to santa cruz, mainly near the
coast/coastal hills. Have gone ahead and done a slight forecast
update to account for the slight chance of light rain on Monday.

Light rain chances will shift as far south as the monterey
peninsula by late Monday afternoon and early evening. Have
adjusted the pop and weather grids to show these light rain
chances later Monday afternoon and evening as well, but ended all
light rain chances by 03z Tuesday. Rain total will be light, only
a few hundredths but perhaps enough to turn on the wiper blades
and wet the roads for the afternoon commute.

Yet another cool trough will approach norcal on Tuesday keeping
slight rain chances going in the north bay. However most areas
will remain dry with the main theme being seasonably cool weather
with brisk onshore breezes off the ocean. The seasonably active
pattern stays in place at least through midweek with north bay
light rain chances still in play.

The forecast will turn dry by Thursday as a longwave trough digs
over the great basin. This will set the stage for a strong
surface pressure gradient with potential for some strong north
winds Thursday night into Friday, especially in the hills. Will
fine tune those details as the week wears on. Then the ECMWF shows
a strong ridge from the east pacific beginning to nudge towards
the coast implying a warming and drying trend as we approach the
end of the month and into may.

Prev discussion As of 2:45 am pdt Sunday... An upper level
trough is currently tracking across northern and central
california. There is no precipitation associated with this trough,
only widespread mid and high level clouds which should mostly
clear by sunrise. This trough has also brought a cooler airmass
into our region which has produced mixing in the low levels and
helped clear most of the patchy low clouds that formed late
yesterday. Thus, we should see mostly sunny skies today along with
seasonably cool temperatures and brisk northwest afternoon winds
in coastal areas.

The weather pattern during the first half of the work week will
consist of cool northwest flow across our region. Embedded within
this flow will be a series of weak upper level disturbances which
may produce periods of light rain across the northern portion of
our forecast area (mainly north bay) from Monday through
Wednesday.

The models agree that by Thursday the synoptic pattern will become
much more meridional as a deep trough develops to our east over
the intermountain west and an upper ridge amplifies offshore.

This will set up a dry north flow across our region with the
potential for locally strong northerly winds in our hills on
Thursday night and Friday morning. Temperatures will warm late in
the week, and especially over the weekend as the upper ridge
offshore shifts eastward and over california. By Saturday high
temperatures could be as much as 15 degrees warmer than what we
will see during the first half of this week.

Aviation As of 4:44 am pdt Sunday... For 12z tafs. Generally
vfr across the district as of writing this discussion. Could be
brief MVFR CIGS early this morning, especially for monterey bay
terminals.VFR this afternoon, with breezy and gusty onshore winds
by late morning. Another tough cig forecast for tonight. Local
wrf model suggests a relatively moist boundary layer through the
day today, enough to keep few-sct low clouds across the region.

It increases rh values later this evening. Likewise, latest lamp
guidance has MVFR CIGS at most terminals by 08-09z mon., earlier
for monterey bay terminals. Needless to say, confidence is low on
cig coverage and timing tonight.

Vicinity of ksfo... GenerallyVFR through this afternoon. Cannot
rule out a couple of hours of MVFR CIGS before sunrise, but not
enough confidence to include in tafs. W-nw winds 15-20 knots
Sunday with afternoon and evening gusts to 25-30 knots possible.

Could be MVFR CIGS late tonight, into the overnight hours, though
confidence is low.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals..Patchy MVFR CIGS possible through about
15z or so, thenVFR. Onshore winds 10-15 knots by late morning,
with gusts in excess of 20 kts at times. Potential for MVFR cigs
by 05z Monday.

Marine As of 08:59 am pdt Sunday... Look for moderate
northwesterly winds to continue through the forecast period with
the highest speeds near the coast. Winds and seas will
dramatically increase by Thursday as the surface pressure
gradient tightens along the california coast.

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... Sf bay from 3 pm
sca... Pigeon pt to pt piedras blancas 10-60 nm from 3 pm
sca... Mry bay from 12 pm
public forecast: rww/dykema
aviation: bam
marine: bell
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PPXC1 - 9414847 - Richmond (Point Potrero), CA 3 mi43 min W 7 G 11 64°F 1017 hPa (+0.9)
PXOC1 - 9414311 - San Francisco (Pier 1), CA 4 mi43 min WSW 11 G 16 59°F 1016 hPa (+1.0)
PXSC1 4 mi43 min 58°F 49°F
OBXC1 4 mi49 min 58°F 50°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 4 mi43 min W 14 G 18 58°F 1016.9 hPa (+0.9)
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 5 mi43 min W 15 G 18
RCMC1 - 9414863 - Richmond, CA 5 mi43 min WNW 8 G 11 61°F 58°F1016.3 hPa (+0.7)
FTPC1 - 9414290 - San Francisco, CA 6 mi43 min W 12 G 20 56°F 57°F1017.4 hPa (+1.1)
AAMC1 - 9414750 - Alameda, CA 7 mi43 min W 11 G 16 59°F 61°F1017.5 hPa (+1.1)
LNDC1 7 mi43 min W 13 G 17 59°F 1017 hPa (+1.1)
46237 - San Francisco Bar, CA (142) 15 mi43 min 56°F7 ft
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 15 mi43 min WNW 8.9 G 12 62°F 1016.2 hPa (+0.7)
UPBC1 18 mi43 min WNW 15 G 18
MZXC1 - 9415102 - Martinez-Amorco CA 18 mi43 min W 12 G 15 60°F 60°F1016.5 hPa (+0.9)45°F
PCOC1 - 9415144 - Port Chicago, CA 22 mi43 min WSW 15 G 19 61°F 59°F1016 hPa (+0.9)
RTYC1 - 9414523 - Redwood City, CA 26 mi43 min W 17 G 20 60°F 64°F1016.9 hPa (+1.0)
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 26 mi53 min WNW 14 G 18 55°F 55°F7 ft1017.8 hPa (+1.5)
SFXC1 - San Francisco Bay Reserve, CA 30 mi58 min W 12 65°F 1015 hPa48°F
PRYC1 - 9415020 - Point Reyes, CA 34 mi43 min WNW 19 G 25 57°F 56°F1017.1 hPa (+1.1)
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 44 mi53 min WNW 14 G 18 56°F 57°F9 ft1018 hPa (+1.6)

Wind History for Point Potrero Richmond, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Oakland, Metro Oakland International Airport, CA14 mi50 minW 1610.00 miPartly Cloudy65°F51°F61%1017.3 hPa
San Francisco, San Francisco International Airport, CA17 mi47 minW 21 G 2910.00 miA Few Clouds and Breezy62°F48°F60%1017.6 hPa
Hayward, Hayward Air Terminal, CA19 mi49 minW 1310.00 miFair63°F46°F54%1018.2 hPa
Concord, Buchanan Field, CA19 mi50 minWNW 1210.00 miFair67°F45°F45%1014.8 hPa
Novato / Gnoss Field, CA22 mi48 minW 7 G 1310.00 miFair66°F48°F52%1016.6 hPa
San Carlos Airport, CA24 mi56 minW 15 G 1910.00 miA Few Clouds63°F44°F52%1017.6 hPa

Wind History from OAK (wind in knots)
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Last 24hrW9W14W10W7W19W12W13W13W11NW11NW7NE5W8NW3W10NW11W15W17W12W10W8W12W14W16
1 day agoSW8W8W11W11SW7NW8NW10W8W7NW7NW6W4W7W11CalmNE4NE3NE3NE4CalmS4CalmW5W8
2 days agoW11W12W14W18W18W16W12NW10NW7NW5NW5W3NW3CalmN3CalmCalmNE3CalmCalmCalmSW4SW5W7

Tide / Current Tables for Angel Island, East Garrison, San Francisco Bay, California
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Angel Island
Click for Map
Sun -- 04:12 AM PDT     1.22 feet Low Tide
Sun -- 04:53 AM PDT     Moonrise
Sun -- 06:23 AM PDT     Sunrise
Sun -- 10:18 AM PDT     5.02 feet High Tide
Sun -- 04:13 PM PDT     0.42 feet Low Tide
Sun -- 04:55 PM PDT     Moonset
Sun -- 07:53 PM PDT     Sunset
Sun -- 10:53 PM PDT     5.62 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.53.52.41.61.21.422.83.84.654.94.23.11.90.90.40.61.32.33.54.65.45.6

Tide / Current Tables for Fleming Point 1.7 mi SW, San Francisco Bay, California Current
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Fleming Point 1.7 mi SW
Click for Map
Sun -- 01:10 AM PDT     -0.36 knots Max Ebb
Sun -- 04:19 AM PDT     0.00 knots Slack
Sun -- 04:53 AM PDT     Moonrise
Sun -- 06:22 AM PDT     Sunrise
Sun -- 07:42 AM PDT     0.63 knots Max Flood
Sun -- 10:59 AM PDT     -0.00 knots Slack
Sun -- 01:25 PM PDT     -0.40 knots Max Ebb
Sun -- 04:32 PM PDT     0.01 knots Slack
Sun -- 04:54 PM PDT     Moonset
Sun -- 07:52 PM PDT     Sunset
Sun -- 08:02 PM PDT     0.75 knots Max Flood
Sun -- 11:26 PM PDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.3-0.4-0.3-0.2-0.10.20.40.60.60.50.3-0-0.2-0.4-0.4-0.3-0.10.20.50.70.70.70.50.2

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 (15,3,4,5)
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Ground Weather Radar Station Sacramento, 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.