Wednesday, November14, 2018 L-36.com


Marine Weather and Tides
Piedmont, CA

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 6:47AMSunset 4:58PM Wednesday November 14, 2018 12:25 PM PST (20:25 UTC) Moonrise 12:40PMMoonset 11:06PM Illumination 42% Phase: First Quarter Moon; Moon at 7 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- 902 Am Pst Wed Nov 14 2018
Today..NE winds up to 10 kt...becoming W this afternoon. Hazy and patchy smoke.
Tonight..SW winds up to 10 kt. Hazy and patchy smoke.
Thu..NE winds up to 10 kt. Hazy and patchy smoke.
Thu night..NW winds up to 10 kt.
Fri..NE winds up to 10 kt.
Fri night..SW winds 5 to 10 kt.
Sat..SW winds around 5 kt.
Sun..W winds around 5 kt.
PZZ500 902 Am Pst Wed Nov 14 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Predominately light north to northwest winds across the waters through the end of the work week. Locally breezy winds will exist near coastal gaps and favored coastal jet areas. Light mixed swell today with a new northwest swelll arriving tomorrow.


7 Day Forecast for Marine Location Near Piedmont, CA
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location: 37.85, -122.22     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 141754
afdmtr
area forecast discussion
national weather service san francisco bay area
954 am pst Wed nov 14 2018

Synopsis Smoke over the region will continue to result in poor
air quality through the work week with dry conditions and light
offshore winds. Seasonably mild, dry conditions will then persist
through the upcoming weekend. A pattern change will potentially
bring rainfall to the region around thanksgiving.

Discussion As of 9:00 am pst Wednesday... Smoke continues to
be the main public health concern across the state this week
therefore will start off with a quick wind and smoke transport
update for the forecast area. North to northeasterly winds aloft
will continue advect smoke from the camp fire burning in butte
county across the bay area with air quality remaining in the
moderate to unhealthy categories per the airnow.Gov site. The
latest hrrr near surface smoke model solution shows little change
in the concentration of the smoke across the region with highest
concentrations expected across the bay area with lighter
concentrations south of the monterey bay peninsula.

Other than smoke, skies will remain mainly clear over the state.

A few high clouds associated with a weak shortwave moving in over
british columbia and portions of the pacific northwest will spill
over the ridge of high pressure that persists off the california
coast and stream across over the district.

Temperatures will warm slightly today with high expected to top
out in the mid 60 to mid 70s in most area. Little change is
expected Thursday with a minor cooling trend forecast Friday
through Sunday as the pattern begins to transition and the ridge
shifts east.

From previous discussion... Not expecting much change in the
overall forecast through late in the week as the synoptic pattern
continues to feature an amplified upper level ridge overhead and a
weak trough pushing inland across british columbia. This trough
well to our north will advect another round of high level clouds
across the region during the next 24 to 36 hours which will help
hold temperatures down slightly. Near surface smoke from the camp
fire will also continue to impact the region and produce poor air
quality, especially the san francisco bay area through late week.

This is as weak offshore flow continues region-wide which is also
maintaining critically dry weather conditions. Thus, near-critical
fire weather conditions will persist at least for another day or
two.

The ridge aloft is forecast to weaken slightly this weekend as a
closed upper level low develops over the eastern pacific and
approaches southern california. This should allow for slightly
cooler daytime temperatures with light onshore flow developing at
times. This pattern will also bring a slight increase in low level
moisture lessening fire weather concerns and potentially
resulting in improved air quality.

The main focus then turns toward a likely pattern change during
the second half of next week which could potentially bring
precipitation to the region. Medium range models generally agree
that a long-wave trough will develop over the eastern pacific and
approach the west coast during the middle of next week. However,
confidence in the details remains low at this time on the track
and strength of embedded short-wave disturbances as they approach
the coast. The ECMWF has backed on precipitation for our region
during the latter half of the week while the GFS and canadian
models have trended wetter from Wednesday into thanksgiving day.

Regardless, look for cooler conditions, increase in surface
moisture and potential for unsettled conditions late in the
forecast period.

Aviation As of 9:55 am pst Wednesday... For 18z tafs. Generally
speaking, light winds with periods of moderate to thick smoke. The
smoke will reduce visibility down to the MVFR range generally,
with isolated pockets of ifr visbys possible. Slant range visibility
issues will also be an issue through the day, particularly around
ksfo koak ksjc where smoke is current thickest. Smoke will
continue to evacuate through the delta from the sacramento valley,
keeping generally poor visbys through the sf bay shoreline
through the day. Otherwise, a few passing high clouds through the
period.

Vicinity of ksfo... Light winds, occasionally to 10 to 12kt by the
afternoon. Smoke evacuating through the delta will bring generally
MVFR visbys through the period, with brief periods ofVFR
possible. Reduced slant range visbys will likely complicate
approach thru the day, but particularly through the morning.

Sfo bridge approach... Similar to terminal.

Monterey bay terminals... GenerallyVFR with periods of MVFR
visibilities possible due to smoke drift.

Marine As of 09:50 am pst Wednesday... Predominately light north
to northwest winds across the waters through the end of the work
week. Locally breezy winds will exist near coastal gaps and
favored coastal jet areas. Light mixed swell today with a new
northwest swell arriving tomorrow.

Mtr watches warnings advisories
Tday None.

Public forecast: cw
aviation: drp
marine: drp
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LNDC1 5 mi38 min NW 5.1 G 7 58°F 1026.4 hPa
OBXC1 7 mi38 min 56°F 46°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 7 mi38 min NNW 5.1 G 8 55°F 1026.5 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 7 mi38 min NNW 7 G 8.9
AAMC1 - 9414750 - Alameda, CA 7 mi44 min 58°F1026.8 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 9 mi38 min NNW 9.9 G 12 59°F 1026.7 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 10 mi38 min NNW 8.9 G 9.9 55°F 1025.7 hPa
PXSC1 10 mi44 min 56°F 42°F
RCMC1 - 9414863 - Richmond, CA 11 mi38 min 58°F
FTPC1 - 9414290 - San Francisco, CA 13 mi44 min NE 6 G 8 57°F 57°F1026.9 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 14 mi38 min NE 4.1 G 5.1 55°F 59°F1027.2 hPa31°F
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 14 mi38 min E 9.9 G 12 1026.6 hPa
PCOC1 - 9415144 - Port Chicago, CA 17 mi38 min NE 6 G 8 55°F 58°F1027.2 hPa
46237 - San Francisco Bar, CA (142) 22 mi116 min 55°F3 ft
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 22 mi38 min ESE 2.9 G 5.1 58°F 1026.9 hPa
RTYC1 - 9414523 - Redwood City, CA 24 mi38 min ENE 2.9 G 4.1 60°F 59°F1026.7 hPa
SFXC1 - San Francisco Bay Reserve, CA 26 mi101 min ENE 4.1 57°F 1028 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 33 mi26 min Calm G 1.9 58°F 56°F1026.7 hPa (-1.8)
PRYC1 - 9415020 - Point Reyes, CA 41 mi38 min Calm G 1 55°F1026.1 hPa

Wind History for Oakland Middle Harbor, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Oakland, Metro Oakland International Airport, CA10 mi33 minW 62.50 miPartly Cloudy with Haze58°F44°F60%1026.7 hPa
Concord, Buchanan Field, CA13 mi33 minno data4.00 miHaze Smoke64°F21°F19%1025.5 hPa
Hayward, Hayward Air Terminal, CA14 mi32 minWSW 33.00 miHaze Smoke60°F37°F44%1027.2 hPa
San Francisco, San Francisco International Airport, CA18 mi30 minNNE 44.00 miPartly Cloudy with Haze59°F42°F54%1026.1 hPa
San Carlos Airport, CA22 mi31 minN 03.00 miSmoke Haze61°F35°F39%1026.4 hPa
Livermore, Livermore Municipal Airport, CA24 mi33 minENE 91.00 miHaze Smoke66°F18°F16%1026.3 hPa

Wind History from OAK (wind in knots)
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Last 24hrW5W6W4NW4CalmS3CalmCalmNW5E4SE6SE5CalmNE6CalmE4SE3SE4E3N3CalmW3SW4W6
1 day agoW5SW6SW3CalmCalmE3CalmCalmCalmCalmNE3CalmNE3NE3CalmNE4CalmE3CalmNE3S3SW3SW5Calm
2 days agoNE18
G24
NE17NE14NE11NE9NE9E4E3E4E5E4SE4CalmCalmSE4CalmCalmCalmSE4SE4E3S6S4SW6

Tide / Current Tables for Berkeley, San Francisco Bay, California
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Oakland Harbor WebStreeter Street, San Francisco Bay, California Current
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Oakland Harbor WebStreeter Street
Click for Map
Wed -- 02:01 AM PST     0.82 knots Max Flood
Wed -- 05:24 AM PST     -0.01 knots Slack
Wed -- 06:48 AM PST     Sunrise
Wed -- 07:24 AM PST     -0.50 knots Max Ebb
Wed -- 11:12 AM PST     0.00 knots Slack
Wed -- 12:40 PM PST     Moonrise
Wed -- 01:46 PM PST     0.40 knots Max Flood
Wed -- 04:20 PM PST     -0.00 knots Slack
Wed -- 04:58 PM PST     Sunset
Wed -- 07:28 PM PST     -0.96 knots Max Ebb
Wed -- 11:06 PM PST     Moonset
Wed -- 11:32 PM PST     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.50.70.80.80.50.2-0.2-0.5-0.5-0.4-0.2-00.20.40.40.30.1-0.2-0.7-0.9-0.9-0.7-0.5-0.2

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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Other links: Northern Pacific     Contential US     Full GOES-East
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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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.