Wednesday, April26, 2017 L-36.com


Marine Weather and Tides
Brisbane, 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 6:16AMSunset 7:57PM Wednesday April 26, 2017 5:00 AM PDT (12:00 UTC) Moonrise 5:48AMMoonset 7:25PM Illumination 0% Phase: New Moon; Moon at 0 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- 223 Am Pdt Wed Apr 26 2017
.small craft advisory in effect from this afternoon through late tonight...
Today..SW winds 10 to 20 kt. Chance of showers in the morning, then slight chance of showers in the afternoon.
Tonight..W winds 15 to 25 kt...decreasing to 5 to 15 kt after midnight.
Thu..W winds 5 to 15 kt.
Thu night..W winds 5 to 15 kt.
Fri..W winds 5 to 15 kt.
Sat..N winds 10 kt...becoming west.
Sun..W winds 5 kt...increasing to 5 to 15 kt.
PZZ500 223 Am Pdt Wed Apr 26 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Predominately light to moderate northwest winds today with stronger winds locally along the big sur coast. Northwest winds increase tonight across the coastal waters as high pressure builds offshore. Strong winds and steep fresh swell will then persist through the remainder of the week.

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 261144
afdmtr
area forecast discussion
national weather service san francisco bay area
444 am pdt Wed apr 26 2017

Synopsis A weak system passes inland to the north dragging a cool
front southeastward through the bay area today. This will result
in light rain mainly from the santa cruz mountains northward. A
warming and drying trend will then get underway beginning Thursday
and likely continuing into the upcoming weekend as high pressure
builds over the eastern pacific. Breezy northerly winds are also
possible from Thursday into Friday, especially in the hills.

Discussion As of 3:05 am pdt Wednesday... A weak system will
pass through our region today which will trigger a few showers
especially over the northern half of our cwa. So far radar returns
have been next-to-nothing although those should pick up later this
morning especially in the north bay. Last few runs of the hrrr
plus 06z of the NAM have backed off on rainfall and have greatly
reduced rainfall from san francisco southward. Still looks like we
could see similar amounts to what we saw yesterday with up to a
tenth for napa/sonoma/marin counties with generally just a few
hundredths or less elsewhere. Highs will be mostly in the 60s
expects some lower 70s over parts of monterey and san benito
counties.

The synoptic pattern will undergo a substantial change starting on
Thursday as a ride of high pressure begins to build into the
pacific. At the same time an upper level low will begin to drop
southward from canada. This will lead to a much tighter pressure
gradient aloft while at the surface a ridge of high pressure will
start to build into our region. The combination of both factors
will help to produce gusty northerly winds especially over higher
elevation locations plus near the coast. 925 mb speeds off the
nam have backed off compared to previous runs and now just have
speeds to 30 kt, so will not be issuing a wind advisory with this
package. Breezy conditions will continue into Friday.

The ridge off the coast will build into our region starting over
the weekend which will help to push inland highs into the mid 70s
to the mid 80s. At the coast enough of a coastal flow should be in
place to keep local beaches in the 60s.

Longer range guidance continues to indicate the ridge being the
dominate feature with the storm track well to our north.

Temperatures next week should average warmer than normal.

Aviation As of 04:45 am pdt Thursday... Widespread MVFR
expected through the day under moist northwest flow aloft. Cigs
may descend to ifr level through the early morning and then again
tonight as upstream moisture continues to advect inland. Cigs
should lift by a few to several hundred feet by midday through
the late afternoon. Thickest low level cloud decks will be in the
south bay area, similar to yesterday, where advected moisture
pools under the NW flow. Winds will generally be light to breezy
today, with some occasional gusts in the 20-25kt range possible.

In addition, very light rain will accompany an air mass boundary
over the northern TAF sites this morning.

Vicinity of ksfo... MVFR CIGS will prevail most of the day. West
winds generally 10-20kt with gusts up to 25kt possible. A passing
shower or two possible mid to late morning.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Becoming MVFR early this morning, then
borderline ifr/MVFR today. Light onshore winds, gusting to
15-20kt by this afternoon. Ifr CIGS tonight.

Marine As of 04:35 am pdt Wednesday... Predominately light to
moderate northwest winds today with stronger winds locally along
the big sur coast. Northwest winds increase tonight across the
coastal waters as high pressure builds offshore. Strong winds and
steep fresh swell will then persist through the remainder of the
week.

Mtr watches/warnings/advisories
Tday Sca... Pt pinos to pt piedras blancas 0-10 nm
sca... Sf bay from 3 pm
public forecast: bell
aviation: drp
marine: drp
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
AAMC1 - 9414750 - Alameda, CA 8 mi48 min WSW 5.1 G 8 58°F 62°F1018 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 9 mi48 min W 2.9 G 8 57°F 1016.7 hPa
PXSC1 9 mi48 min 57°F 56°F
OBXC1 9 mi48 min 57°F 56°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 9 mi48 min WSW 8.9 G 11
FTPC1 - 9414290 - San Francisco, CA 10 mi48 min SSW 4.1 G 7 56°F 54°F1017.9 hPa
LNDC1 10 mi54 min WSW 7 G 8.9 58°F 1017.5 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 10 mi48 min WSW 4.1 G 8 57°F 1017.7 hPa
RTYC1 - 9414523 - Redwood City, CA 14 mi48 min SE 1.9 G 4.1 58°F 64°F1017 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 16 mi48 min Calm 56°F 1018 hPa
46237 - San Francisco Bar, CA (142) 16 mi60 min 54°F4 ft
PPXC1 - 9414847 - Richmond (Point Potrero), CA 16 mi54 min SW 9.9 G 12 57°F 1017.7 hPa
RCMC1 - 9414863 - Richmond, CA 18 mi48 min SSW 4.1 G 6 56°F 58°F1017.4 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 25 mi70 min WSW 3.9 G 5.8 55°F 55°F4 ft1017.8 hPa (-2.0)
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 27 mi48 min SW 12 G 16 57°F 1016.6 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 29 mi48 min SW 12 G 14 57°F 59°F1017.2 hPa57°F
UPBC1 29 mi48 min WSW 11 G 17
PCOC1 - 9415144 - Port Chicago, CA 32 mi42 min SW 8.9 G 14 58°F 59°F1016.5 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 34 mi70 min W 5.8 G 5.8 56°F 56°F6 ft1017.8 hPa (-1.5)
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 37 mi48 min W 6 G 12 58°F 1015.9 hPa
PRYC1 - 9415020 - Point Reyes, CA 39 mi48 min S 1.9 G 2.9 56°F 52°F1016.7 hPa
SFXC1 - San Francisco Bay Reserve, CA 41 mi75 min W 7 58°F 1017 hPa55°F

Wind History for Alameda, CA
(wind in knots)    EDIT      (on/off)   Help
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W5
G11
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G13
NW4
G7
W4
W6
G9
W8
G12
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G12
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G12
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G12
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G12
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G9
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G7
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1 day
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W7
G10
W5
G8
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G11
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G11
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G11
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G16
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G17
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NW5
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W8
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G6
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G12
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G16
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G10

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Francisco, San Francisco International Airport, CA4 mi64 minSSW 510.00 miMostly Cloudy57°F53°F87%1017.4 hPa
Oakland, Metro Oakland International Airport, CA9 mi67 minWSW 710.00 miOvercast60°F55°F86%1017.7 hPa
San Carlos Airport, CA12 mi65 minS 310.00 miOvercast57°F50°F77%1017.9 hPa
Half Moon Bay Airport, CA13 mi65 minSSE 31.00 miFog/Mist55°F53°F94%1017.9 hPa
Hayward, Hayward Air Terminal, CA14 mi66 minSSW 610.00 miOvercast60°F51°F72%1018.3 hPa
Mountain View, Moffett Field, CA24 mi64 minS 310.00 miA Few Clouds57°F51°F81%1018.2 hPa

Wind History from SFO (wind in knots)
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Last 24hrW17W16W16W13W16
G22
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G24
W18
G24
W18W17W20
G26
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G23
W11W20W7
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W7W8NW6W12SW8SW10SW5
1 day agoW8W7SW6S3SW7W12W15
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SW14W13
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G25
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2 days agoW17W12W13W14W12W13W15W21
G29
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W23W18W13W11

Tide / Current Tables for Oyster Point Marina, San Francisco Bay, California
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Oyster Point Marina
Click for Map
Wed -- 12:29 AM PDT     7.49 feet High Tide
Wed -- 05:18 AM PDT     New Moon
Wed -- 06:19 AM PDT     Sunrise
Wed -- 06:47 AM PDT     Moonrise
Wed -- 07:04 AM PDT     -0.77 feet Low Tide
Wed -- 01:33 PM PDT     6.39 feet High Tide
Wed -- 07:03 PM PDT     1.07 feet Low Tide
Wed -- 07:55 PM PDT     Sunset
Wed -- 08:24 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
7.47.46.54.82.81-0.3-0.8-0.40.72.345.46.36.35.54.12.61.51.11.42.64.25.9

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
Wed -- 12:46 AM PDT     -0.00 knots Slack
Wed -- 04:05 AM PDT     -1.60 knots Max Ebb
Wed -- 05:18 AM PDT     New Moon
Wed -- 06:19 AM PDT     Sunrise
Wed -- 06:47 AM PDT     Moonrise
Wed -- 07:12 AM PDT     0.00 knots Slack
Wed -- 10:21 AM PDT     1.34 knots Max Flood
Wed -- 01:43 PM PDT     -0.01 knots Slack
Wed -- 04:33 PM PDT     -1.18 knots Max Ebb
Wed -- 07:19 PM PDT     0.00 knots Slack
Wed -- 07:55 PM PDT     Sunset
Wed -- 08:24 PM PDT     Moonset
Wed -- 10:23 PM PDT     1.14 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.5-0.1-0.8-1.4-1.6-1.4-0.9-0.20.511.31.310.5-0.2-0.8-1.1-1.1-0.7-0.20.40.81.11.1

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 (8,2,3,4)
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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.