Tuesday, June18, 2019 L-36.com


Marine Weather and Tides
Brisbane, CA

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6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 5:46AMSunset 8:35PM Tuesday June 18, 2019 12:55 PM PDT (19:55 UTC) Moonrise 8:59PMMoonset 5:58AM Illumination 98% Phase: Waning Gibbous; Moon at 16 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 The San Francisco Bay North Of The Bay Bridge- 854 Am Pdt Tue Jun 18 2019
Today..SW winds 10 to 20 kt.
Tonight..SW winds 10 to 20 kt with gusts up to 25 kt.
Wed..SW winds 10 to 20 kt with gusts up to 25 kt.
Wed night..SW winds 15 to 20 kt with gusts up to 25 kt.
Thu..SW winds 10 to 20 kt with gusts up to 30 kt.
Thu night..SW winds 10 to 15 kt.
Fri..SW winds 10 to 15 kt.
Sat..W winds 10 to 15 kt.
PZZ500 854 Am Pdt Tue Jun 18 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Moderate and gusty northerly winds will continue over the northern outer waters through late week producing steep fresh swells. A thermal trough along the coast will maintain light southerly winds and seas over the near shore waters. Winds will increase each afternoon over the bays as onshore flow increases.


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 181805
afdmtr
area forecast discussion
national weather service san francisco bay area
1105 am pdt Tue jun 18 2019

Synopsis Strengthening high pressure will continue a warming
trend today. However, onshore surface winds will persist, keeping
temperatures seasonably cool at the coast. Seasonable
temperatures, along with areas of night and morning low clouds,
are forecast through the end of the week and into the upcoming
weekend.

Discussion As of 09:06 am pdt Tuesday... No changes needed to
the ongoing forecast this morning. Stratus continues to quickly
dissipate over inland areas as surface temperatures begin to
warm. Strong and gusty winds mentioned in the previous forecast
discussion have also diminished except for in the highest peaks of
the north bay and east bay where gust of 30 to 50 mph continue to
be reported. For full details, please see the previous forecast
discussion below.

Prev discussion As of 3:05 am pdt Tuesday... The marine layer has
compressed slightly since yesterday as an upper level ridge over
the eastern pacific builds inland across northern california.

Meanwhile, surface high pressure to our north over oregon and far
northern california is maintaining a moderate north-to-south
pressure gradient of nearly 5 mb from acv to sfo. The result has
been locally gusty north winds across the higher hills of the
north bay. These gusty winds, in conjunction will rather poor
overnight humidity recoveries in the hills above 2000 feet, is
somewhat concerning from a fire weather perspective. However,
winds in the north bay hills are forecast to subside by mid
morning, and are therefore not expected to have a prolonged or
significant impact.

The combination of a shallower marine layer and reduced onshore
flow has resulted in less inland development of low clouds
overnight compared to the past few nights, especially across the
north and east bay. Therefore, many inland areas are expected to
experience more prolonged sunshine today. In addition, subsidence
under the building upper level ridge has warmed the airmass aloft
a few additional degrees c since yesterday. These factors suggest
that afternoon highs today will be warmer then yesterday,
especially across inland areas. However, persistent onshore flow
at the surface will limit the amount of warming to about 3 to 5
degrees in most areas, and also prevent some coastal areas from
clearing today.

Today will likely be the warmest day of the week. Slightly cooler
temperatures are forecast for Wednesday as an upper trough settles
into the pacific northwest and the ridge over california begins to
weaken. Further cooling is forecast for Thursday as the trough
digs into the northern great basin and the ridge retreats
offshore. There will also likely be an increase in inland
development of night and morning low clouds over the next few
days.

Slight warming is expected on Friday and Saturday as the upper
ridge builds back towards the coast. Despite the changes in
temperatures anticipated during the forecast period, temperatures
are not forecast to vary all that much from seasonal averages
through the week and into next weekend.

In the longer range, the GFS ensemble mean and ECMWF ensemble
mean both forecast an upper trough to be centered along the west
coast next Monday and Tuesday. It therefore appears likely that
cooler than normal conditions will dominate the first half of next
week.

Aviation As of 11:05 am pdt Tuesday... For 18z tafs. Northerly
gradient remains strong but has weakened slightly to around 4 mb
from sfo to acv. Marine layer about 1500-1800 ft combined with
strong northerly gradient kept stratus out of inland locations
such as ksts, klvk, and ksjc while stratus developed along the
coast and into the salinas valley, and over the sf bay for a few
hours this morning. Satellite and surface obs reveal stratus has
retreated to the coastline in most locations with all TAF sites
expected to remain inVFR this afternoon. Winds this afternoon
will become onshore and increase to around 10-15 kt. Stratus will
expand this evening and overnight once again. A slight increase in
southerly winds along the coast will favor a return to CIGS at
sts overnight tonight.

Vicinity of ksfo... Clearing occurred between 16-17z withVFR
expected to prevail this afternoon. Light northerly winds will
turn west-northwest this afternoon and increase to around 15kt.

Occasional gusts to 20 kt are possible.VFR expected through the
evening with MVFR late tonight through Wednesday morning.

Sfo bridge approach... Similar to sfo.

Monterey bay terminals... Clearing has occurred at the terminals
this morning withVFR conditions through the afternoon. Winds will
become onshore and increase to around 10-15 kt this afternoon. Ifr
to lifr CIGS will develop this evening and overnight tonight. May
see a slightly later return to ifr at kmry if southerly winds keep
stratus out until closer to 06z.

Marine As of 09:06 am pdt Tuesday... Moderate and gusty
northerly winds will continue over the northern outer waters
through late week producing steep fresh swells. A thermal trough
along the coast will maintain light southerly winds and seas over
the near shore waters. Winds will increase each afternoon over the
bays as onshore flow increases.

Mtr watches warnings advisories
Tday Sca... Pt arena to pigeon pt 10-60 nm
public forecast: rgass dykema
aviation: st
marine: st
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46237 - San Francisco Bar, CA (142) 16 mi56 min 57°F4 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 25 mi36 min SW 3.9 G 7.8 56°F 56°F1015.9 hPa
SFXC1 - San Francisco Bay Reserve, CA 41 mi71 min WNW 12 77°F 1012 hPa59°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 mi60 minNW 139.00 miA Few Clouds69°F57°F66%1013.8 hPa
Oakland, Metro Oakland International Airport, CA9 mi63 minWNW 1110.00 miA Few Clouds70°F57°F64%1014.1 hPa
San Carlos Airport, CA12 mi69 minNNE 99.00 miClear68°F62°F83%1014.2 hPa
Half Moon Bay Airport, CA13 mi61 minS 69.00 miOvercast59°F55°F88%1015.2 hPa
Hayward, Hayward Air Terminal, CA14 mi62 minW 810.00 miFair73°F57°F59%1014.6 hPa
Palo Alto Airport, CA19 mi69 minN 910.00 miClear70°F60°F73%1013.9 hPa
Mountain View, Moffett Field, CA24 mi60 minN 810.00 miFair74°F61°F64%1014 hPa

Wind History from SFO (wind in knots)
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Last 24hrNE6NE8NW11NW13NW15NW14NW11W9NW5W4NW43NW5N3W5S4S5SW3CalmCalmN6NE6N6NW13
1 day agoW13W14W19W16W20W19W15W12W12W105W8W4S5SW5S5S4S5S6S6E7NE6NE6N6
2 days agoW11W15W15SW15W16SW15W15W11SW14SW11W9SW10SW8W8SW9W7W7SW8W9SW8SW8W9W11W12

Tide / Current Tables for Oyster Point Marina, San Francisco Bay, California
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Oyster Point Marina
Click for Map
Tue -- 01:03 AM PDT     7.38 feet High Tide
Tue -- 05:47 AM PDT     Sunrise
Tue -- 06:58 AM PDT     Moonset
Tue -- 08:12 AM PDT     -1.21 feet Low Tide
Tue -- 03:12 PM PDT     5.90 feet High Tide
Tue -- 08:05 PM PDT     3.01 feet Low Tide
Tue -- 08:33 PM PDT     Sunset
Tue -- 09:58 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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77.475.94.22.30.6-0.6-1.2-1-0.11.32.84.35.45.95.754.13.333.34.15.2

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 -- 01:14 AM PDT     -0.00 knots Slack
Tue -- 04:49 AM PDT     -1.54 knots Max Ebb
Tue -- 05:47 AM PDT     Sunrise
Tue -- 06:58 AM PDT     Moonset
Tue -- 08:17 AM PDT     0.01 knots Slack
Tue -- 11:34 AM PDT     1.20 knots Max Flood
Tue -- 03:00 PM PDT     -0.00 knots Slack
Tue -- 05:26 PM PDT     -0.67 knots Max Ebb
Tue -- 08:08 PM PDT     0.00 knots Slack
Tue -- 08:33 PM PDT     Sunset
Tue -- 09:58 PM PDT     Moonrise
Tue -- 11:02 PM PDT     0.77 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.60.1-0.4-1-1.4-1.5-1.3-0.9-0.20.40.91.21.210.60-0.4-0.7-0.6-0.4-0.10.30.60.8

Weather Map and Satellite Images
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wmap_P
GOES Local Image of CentralWestCoast    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
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Wind Forecast for San Francisco/Monterey Bay Area, CA (15,3,4,5)
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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.