Saturday, October19, 2019 L-36.com


Marine Weather and Tides
Piedmont, CA

Version 3.4
NOTICE
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
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 7:19AMSunset 6:27PM Saturday October 19, 2019 12:21 PM PDT (19:21 UTC) Moonrise 9:45PMMoonset 11:54AM Illumination 64% Phase: Waning Gibbous; Moon at 21 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- 913 Am Pdt Sat Oct 19 2019
Today..W winds 5 to 15 kt.
Tonight..W winds 5 to 15 kt.
Sun..W winds up to 10 kt.
Sun night..NW winds 5 to 10 kt.
Mon..W winds up to 10 kt.
Mon night..W winds around 5 kt.
Tue..NW winds up to 10 kt.
Wed..N winds 5 to 15 kt.
PZZ500 913 Am Pdt Sat Oct 19 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... High pressure will build over the eastern pacific and extend over far northern california into the great basin through early to mid next week. Northwest swell will subside through the weekend and into early next week.


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 191749
afdmtr
area forecast discussion
national weather service san francisco bay area
1049 am pdt Sat oct 19 2019

Synopsis A weak front is currently moving across northern
california. Radar shows most precipitation is well north of the
bay area, but light rain is still a possibility across the extreme
north portions of sonoma or napa counties late this morning.

Breezy winds are expected behind the front. Minor warming of
temperatures are expected this weekend, before a more robust
warming trend next week. High pressure will build over the
eastern pacific setting up offshore flow by midweek.

Discussion As of 10:00 am pdt Saturday... Satellite imagery
shows increasing clouds across the northern portion of the CWA as
a weak frontal system moves across northern california. Shower
activity appears to be well north of our area at this time per
radar returns, but we still have slight chance pops in the north
bay through the morning. Onshore winds will strengthen and become
breezy this afternoon, especially along the coast. Drier air will
also filter in and slightly warmer temperatures are expected this
weekend.

A more robust warming trend will occur next week as an upper level
ridge builds over the eastern pacific. High temperatures are
expected to warm into the 70s and 80s next week as the ridge axis
moves slowly east into california. Additionally, the surface
pressure gradients will trend offshore, and the stronger offshore
winds coupled with a much drier and warm airmass will elevate fire
weather concerns. Conditions are expected to become more critical
after midweek when the gradient tightens. There is still some
fine-tuning needed, but stay tuned as the event nears and
confidence in the forecast model output builds.

Aviation As of 10:50 am pdt Saturday... Weak frontal passage
will bring vcsh to ksts and MVFR CIGS across the region as it
passes through this afternoon. Winds generally light to locally
breezy in favored locations. Clearing rapidly returns tonight
into Sunday morning.

Vicinity of ksfo... Deteriorating CIGS over the next few hours as
boundary approaches with bkn ovc 2000-2500 ft posbl thru the day.

Not expecting wetting rains to impact the runways with this
system. Sust winds increasing to around 15kt with occasional gusts
into the low 20kts posbl after 21z.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Increasing clouds from the northwest
today. Lower level clouds will bring MVFR CIGS after 20-21z thru
the rest of the day before clearing out overnight. Winds 10kt or
less. No wetting rains on the runways.

Fire weather As of 3:05 pm pdt Friday... Two main fire weather
concerns over the next seven days. The first impact will be
focused tonight over the higher terrain of the santa lucia
mountains. Hi-res WRF model continues to show a localized
offshore flow scenario tonight with N to NE winds 25-35 mph with
poor humidity recovery. The second impact will be focused on next
week. High pressure is forecast to build starting Sunday Monday
and continue through much of the next week with a warming and
drying trend. More importantly, offshore flow is forecast to
develop on Monday and increase each day before peaking Wednesday
night Thursday morning. Latest GFS continues to show a robust
15mb+ sfo-wmc... That being said the ECMWF isn't as strong. None
the less, this situation next week needs watching. Even if the
strength of the wind doesn't verify rh will be low by night number
three. Stay tuned... .

Marine As of 10:43 am pdt Saturday... High pressure will build
over the eastern pacific and extend over far northern california
into the great basin through early to mid next week. Northwest
swell will subside through the weekend and into early next week.

Mtr watches warnings advisories
Tday Sca... Pt pinos to pt piedras blancas 0-10 nm
sca... Rough bar advisory for sf bar
public forecast: sims
aviation: drp
marine: drp
fire weather: mm
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LNDC1 5 mi51 min S 2.9 G 5.1 61°F 1020 hPa
AAMC1 - 9414750 - Alameda, CA 7 mi51 min ESE 4.1 G 6
OBXC1 7 mi51 min 62°F 54°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 7 mi51 min SSW 2.9 G 7 61°F 1020.1 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 7 mi51 min S 1.9 G 4.1
PPXC1 - 9414847 - Richmond (Point Potrero), CA 9 mi57 min SSW 8.9 G 14 60°F 1020.1 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 10 mi51 min SSW 2.9 G 8 63°F 1019 hPa
PXSC1 10 mi51 min 62°F 53°F
RCMC1 - 9414863 - Richmond, CA 11 mi51 min S 7 G 11
TIBC1 - Tiburon Pier, San Francisco Bay, CA 12 mi40 min S 11 61°F 1019 hPa
FTPC1 - 9414290 - San Francisco, CA 13 mi51 min WSW 5.1 G 8.9
UPBC1 14 mi51 min WNW 11 G 16
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 14 mi51 min WSW 11 G 14 63°F 1019 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 14 mi51 min W 12 G 14 65°F 63°F1019.1 hPa
PCOC1 - 9415144 - Port Chicago, CA 17 mi51 min W 15 G 19 64°F 63°F1019.2 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 22 mi51 min NW 8.9 G 13 65°F 1018.6 hPa
46237 - San Francisco Bar, CA (142) 22 mi51 min 55°F8 ft
RTYC1 - 9414523 - Redwood City, CA 24 mi51 min ENE 1.9 G 4.1 63°F 64°F1020.8 hPa
SFXC1 - San Francisco Bay Reserve, CA 26 mi96 min W 6 63°F 1019 hPa52°F
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 33 mi31 min SSW 5.8 G 7.8 57°F 56°F9 ft1020.5 hPa
PRYC1 - 9415020 - Point Reyes, CA 41 mi51 min 52°F1019.7 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 mi28 minS 510.00 miMostly Cloudy63°F51°F65%1020.1 hPa
Concord, Buchanan Field, CA13 mi28 minSW 1010.00 miOvercast70°F51°F51%1017.7 hPa
Hayward, Hayward Air Terminal, CA14 mi27 minWNW 510.00 miPartly Cloudy65°F52°F63%1020.7 hPa
San Francisco, San Francisco International Airport, CA18 mi25 minNNW 810.00 miMostly Cloudy66°F54°F65%1019.5 hPa
San Carlos Airport, CA22 mi34 minVar 410.00 miMostly Cloudy64°F53°F68%1020.3 hPa
Livermore, Livermore Municipal Airport, CA24 mi28 minWSW 510.00 miPartly Cloudy68°F51°F55%1018.9 hPa

Link to 5 minute data for KOAK

Wind History from OAK (wind in knots)
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Last 24hrW13W13W15W15W17W14W16W12W8W6NW4CalmNE4Calm3SE4CalmCalmSE5SE7SE8SE9S7S5
1 day agoW9W14W18W21W17W16W12NW3NW5NW6NW8N6S3NW4CalmS3E3E3N3NE4SE6SE6S7S5
2 days agoSW4W4W8W13W10W13W9W7W4SW5W10W6W7W6W7W8W9W7W8NW5W8W7W8W8

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
Sat -- 01:36 AM PDT     0.88 knots Max Flood
Sat -- 05:09 AM PDT     -0.00 knots Slack
Sat -- 07:15 AM PDT     -0.59 knots Max Ebb
Sat -- 07:21 AM PDT     Sunrise
Sat -- 10:03 AM PDT     0.00 knots Slack
Sat -- 12:54 PM PDT     Moonset
Sat -- 01:23 PM PDT     0.54 knots Max Flood
Sat -- 03:50 PM PDT     -0.00 knots Slack
Sat -- 06:26 PM PDT     Sunset
Sat -- 07:29 PM PDT     -1.21 knots Max Ebb
Sat -- 10:44 PM PDT     Moonrise
Sat -- 11:15 PM PDT     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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0.60.80.90.70.40.1-0.3-0.6-0.5-0.3-00.20.40.50.50.3-0.1-0.4-0.9-1.2-1.2-0.9-0.5-0.1

Weather Map
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wmap_P
GEOS 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.
Link to Loop

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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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.