Tuesday, January22, 2019 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 7:18AMSunset 5:22PM Tuesday January 22, 2019 5:19 AM PST (13:19 UTC) Moonrise 7:29PMMoonset 8:38AM Illumination 97% 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- 219 Am Pst Tue Jan 22 2019
Today..N winds 5 to 15 kt. Gusts up to 25 kt this morning.
Tonight..SE winds up to 10 kt.
Wed..NE winds 5 to 10 kt.
Wed night..NE winds up to 10 kt.
Thu..NE winds up to 10 kt.
Thu night..E winds 5 to 10 kt.
Fri..NE winds up to 10 kt.
Sat..NE winds up to 10 kt.
PZZ500 219 Am Pst Tue Jan 22 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Winds will decrease during the day as a low pressure system over the high pressure building over the southwest moves further east. High pressure will dominate off the california coast and over the great basin through the remainder of the week resulting in light winds through the period.


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 221155
afdmtr
area forecast discussion
national weather service san francisco bay area
355 am pst Tue jan 22 2019

Synopsis High pressure will bring dry and tranquil weather to
the state the rest of this week and through the upcoming weekend.

The dry pattern may last through the end of the month with mild
days and cool nights.

Discussion As of 3:36 am pst Tuesday... Recall that the pattern
turned wet around thanksgiving and essentially for the last two
months we've been in a fairly active storm cycle with year to date
rainfall running 80-100% of normal. For the first time since late
november a strong and stable ridge is forecast to build over the
west coast and california bringing a prolonged stretch of dry
weather at least for the next week and likely through the end of
the month.

In the short term skies are mostly clear with gusty northerly
winds in the hills to around 25-30 mph keeping the boundary layer
fairly well mixed with temperatures currently running in the upper
30s and 40s most areas with lower 50s in the city. Look for a few
degrees of warming today with highs into the lower 60s most
locations. This will be due to dry north northeasterly flow and
modest 850 mb temp warming. This trend continues into weds when
temps may warm into the mid 60s with plenty of sunshine
regionwide.

A weak ripple in the flow may knock 850 mb temps down slightly by
Thursday but those effects may be mitigated by another round of
light to moderate offshore flow. Sometimes during this time of
year the easterly flow can bring clammy tule fog from the delta
into the bay area but that doesnt seem to be the case at this
time.

Upcoming weekend looks high and dry with the ECMWF building a 588
dm 500 mb ridge along the california coast. This will bring sunny
skies and seasonably mild highs in the 60s with even some 70s
possible for the central coast.

Right now confidence is above average that the ridge will keep dry
weather in place at least for the next 7 days. There have been and
continue to be signals that the ridge will break down by the end
of the month or early february with westerlies breaking through
once again. This is supported by the pna teleconnection trending
negative and is showing up in the long range GFS ensembles as well
as the CFS for renewed precip chances by early feb.

Aviation As of 4:00 am pst Tuesday... Northerly flow is helping
to dry out the lower level of the atmosphere. High confidence of
vfr through Wednesday.

Vicinity of ksfo...VFR through the period. Northerly winds 5-10
mph.

Sfo bridge approach... Similar to sfo.

Monterey bay terminals...VFR. Southeast drainage wind 5-10 mph in
the morning otherwise light winds.

Marine As of 03:48 am pst Tuesday... Winds will decrease during
the day as a low pressure system over the high pressure building
over the southwest moves further east. High pressure will dominate
off the california coast and over the great basin through the
remainder of the week resulting in light winds through the
period.

Mtr watches warnings advisories
Tday Sca... Pigeon pt to pt pinos 0-10 nm until 3 pm
sca... Pt pinos to pt piedras blancas 0-10 nm until 3 pm
sca... Pigeon pt to pt piedras blancas 10-60 nm until 3 pm
sca... Pt arena to pigeon pt 10-60 nm
public forecast: rww
aviation: W pi
marine: W pi
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LNDC1 5 mi31 min N 7 G 9.9 51°F 1027.5 hPa
OBXC1 7 mi31 min 51°F 40°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 7 mi31 min N 9.9 G 12 51°F 1027.8 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 7 mi31 min N 11 G 12
AAMC1 - 9414750 - Alameda, CA 7 mi37 min N 6 G 12 50°F 54°F1028.1 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 9 mi31 min NE 1.9 G 2.9 48°F 1028.2 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 10 mi31 min NNW 7 G 8 51°F 1026.9 hPa
PXSC1 10 mi37 min 53°F 39°F
RCMC1 - 9414863 - Richmond, CA 11 mi31 min 54°F
TIBC1 - Tiburon Pier, San Francisco Bay, CA 12 mi32 min Calm 47°F 1028 hPa
FTPC1 - 9414290 - San Francisco, CA 13 mi37 min SSW 1.9 G 2.9 48°F 54°F1028.1 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 14 mi31 min NW 2.9 G 4.1 51°F 1028 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 14 mi31 min S 1 G 1.9 52°F1028 hPa
PCOC1 - 9415144 - Port Chicago, CA 17 mi31 min S 6 G 7 43°F 51°F1028.1 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 22 mi31 min NNW 6 G 8.9 52°F 1027.9 hPa
RTYC1 - 9414523 - Redwood City, CA 24 mi31 min W 2.9 G 4.1 49°F 55°F1028.3 hPa
SFXC1 - San Francisco Bay Reserve, CA 26 mi94 min W 2.9 46°F 1028 hPa28°F
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 33 mi29 min N 12 G 16 54°F 56°F8 ft1028.2 hPa
PRYC1 - 9415020 - Point Reyes, CA 41 mi31 min 54°F1027.8 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 mi26 minN 010.00 miFair43°F34°F71%1027.8 hPa
Concord, Buchanan Field, CA13 mi26 minSSE 310.00 miFair38°F34°F86%1026.7 hPa
Hayward, Hayward Air Terminal, CA14 mi25 minN 010.00 miFair42°F36°F79%1028.7 hPa
San Francisco, San Francisco International Airport, CA18 mi23 minNW 310.00 miA Few Clouds49°F37°F66%1027.6 hPa
San Carlos Airport, CA22 mi24 minNW 310.00 miFair46°F35°F66%1028.1 hPa
Livermore, Livermore Municipal Airport, CA24 mi26 minSE 610.00 miFair44°F30°F58%1027.5 hPa

Wind History from OAK (wind in knots)
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Last 24hrW11CalmW12NW8NW10NW8NW8NW5W9W11W9W8W7N6NW7NW7NW7NW7N7CalmN4CalmNW6Calm
1 day agoSE5S7SE9S11S9SW6SW7SW11W16W14W11W14W19
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2 days agoNE4E4NW4CalmCalmSW4W5W4W6W6W6NW6NW3CalmCalmCalmCalmCalmCalmCalmSE3SE4S4SE5

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
Tue -- 01:07 AM PST     -0.01 knots Slack
Tue -- 03:17 AM PST     -0.88 knots Max Ebb
Tue -- 06:20 AM PST     0.00 knots Slack
Tue -- 07:20 AM PST     Sunrise
Tue -- 08:38 AM PST     Moonset
Tue -- 09:29 AM PST     1.00 knots Max Flood
Tue -- 12:14 PM PST     -0.00 knots Slack
Tue -- 03:29 PM PST     -1.73 knots Max Ebb
Tue -- 05:21 PM PST     Sunset
Tue -- 07:16 PM PST     0.00 knots Slack
Tue -- 07:28 PM PST     Moonrise
Tue -- 10:33 PM PST     1.35 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.70.1-0.5-0.9-0.8-0.5-0.10.30.7110.70.2-0.5-1.2-1.7-1.7-1.3-0.8-0.20.511.31.3

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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for San Francisco/Monterey Bay Area, CA (8,2,3,4)
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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.