Wednesday, February20, 2019 L-36.com


Marine Weather and Tides
Alameda, 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 6:51AMSunset 5:54PM Wednesday February 20, 2019 7:08 AM PST (15:08 UTC) Moonrise 7:28PMMoonset 7:51AM Illumination 99% 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- 302 Am Pst Wed Feb 20 2019
.small craft advisory in effect through this evening...
Today..NW winds 10 to 20 kt with gusts up to 30 kt. A chance of showers.
Tonight..NW winds 10 to 20 kt with gusts up to 25 kt.
Thu..N winds 10 to 20 kt with gusts up to 25 kt.
Thu night..N winds 5 to 15 kt with gusts up to 25 kt.
Fri..E winds up to 10 kt.
Fri night..W winds 5 to 15 kt.
Sat..W winds up to 10 kt.
Sun..SW winds 5 to 10 kt. A chance of showers.
PZZ500 302 Am Pst Wed Feb 20 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Increasing northwest winds are forecast today and remain gusty through the remainder of the work week. This wind will generate steep fresh swell causing hazardous conditions. Isolated gale force gusts are possible with widespread gale force conditions in the outer waters late tonight through Thursday. Moderate northwest swell.


7 Day Forecast for Marine Location Near Alameda, CA
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location: 37.78, -122.28     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 201142
afdmtr
area forecast discussion
national weather service san francisco bay area
342 am pst Wed feb 20 2019

Synopsis After a few days of dry weather, isolated to
scattered mainly light rain snow showers are forecast to return
to the area today and persist into early Thursday morning.

Snowfall will be likely limited to the highest elevations,
especially across the diablo range and the santa lucia mountains.

Dry conditions return on Thursday and continue into at least
Friday before rain chances return to northern california during
the late in the weekend and early next week.

Discussion As of 3:02 am pst Wednesday... What a difference 24
hours makes... Increasing clouds, stronger winds and even some
showers are leading to much warmer temperatures. The latest 24
hour trend indicates many locations are currently running 6 to 12
degrees warmer than yesterday morning. Therefore, adjust morning
lows upward from previous forecast. Not expecting any frost black
ice concerns this morning. Monterey and salinas airports did
report a rab rae with a trace of precip. Kmux radar imagery did
pick up on this very scattered showers passing through the
monterey bay region. These showers are likely associated with
enhanced lifted from a passing vort max.

For the rest of today... Clouds will continue to increase as an
upstream upper level trough digs farther into norcal. Radar
imagery (kbhx) near eureka is already showing shower activity
associated with the upper trough. The upper trough will ultimately
dig more and become a cut off low over socal S nev on Thursday.

This trajectory is more like an inside slider with much of the bay
area being on the drier side. However, there will still be a
chance for some precip across the bay area over the next 24-36
hours. Latest hi-res model do show showers over the coastal
waters coast early Wednesday spreading inland Wednesday
afternoon early Thursday and then drying N to S Thursday. Not
expecting a real soaker given the lack of moisture, but a few
hundredths to a tenth seems most likely and up to a half inch in
the santa lucia range. It should also be noted the upper trough is
rather cold and snow levels will drop through the day to
2500-3500 feet with minor snow accumulations over the highest
peaks. Lastly, given the cold nature of these showers any stronger
cell with vertical development could have some hail associated
with it.

Clearing develops Thursday night and Friday with shortwave
ridging. Overnight lows will cool off again with some patchy
frost and daytime highs will warm slightly.

Dry weather kicks off the upcoming weekend, but rain chances
gradually increase over the north bay Saturday afternoon before
spreading southward on Sunday.

It will be interesting to watch the pattern beyond Sunday as some
of the models show additional atmospheric rivers impacting norcal.

Latest GFS fv3 models shows a weak to moderate ar moving into
norcal day 6 7 through day 10. A lot can change between now and
then, but it appears the storm door remains open.

Aviation As of 3:45 am pst Wednesday... Increasing low level
clouds with borderline MVFRVFR CIGS thru the morning and early
afternoon, before gradual clearing through the remainder of the
day. While there will be -shra vcsh, main impact will come with
the gusty northwest winds that are expected through the day.

Generally sustained winds 10 to 20 kt with gusts 20 to 30kt
throughout the region, with locally higher for the windiest spots
such as near ksfo and along the coast and or over higher terrain.

Vicinity of ksfo... Borderline MVFRVFR CIGS thru most daylight
hours with passing light showers. Increasing northwest winds
through the day will peak late morning through early afternoon,
with sustained winds to around 15-25kt and gusts to around 35kt.

Passing showers may wet runways. Winds taper off tonight.

Sfo bridge approach... Similar to sfo.

Monterey bay terminals... .Borderline MVFRVFR CIGS thru most
daylight hours with passing light showers. Increasing northwest
winds through the day will peak late morning through early
afternoon with sustained winds to around 15-20kt with gusts to
around 30kt.

Marine As of 03:35 am pst Wednesday... Increasing northwest
winds are forecast today and remain gusty through the remainder of
the work week. This wind will generate steep fresh swell causing
hazardous conditions. Isolated gale force gusts are possible with
widespread gale force conditions in the outer waters late tonight
through Thursday. Moderate northwest swell.

Mtr watches warnings advisories
Tday Sca... Pt arena to pt reyes 0-10 nm
sca... Pt reyes to pigeon pt 0-10 nm
sca... Pigeon pt to pt pinos 0-10 nm
sca... Pt pinos to pt piedras blancas 0-10 nm
sca... Pt arena to pigeon pt 10-60 nm
sca... Pigeon pt to pt piedras blancas 10-60 nm
sca... Sf bay
sca... Mry bay
public forecast: mm
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 1 mi44 min NNW 5.1 G 8 49°F 52°F1015.8 hPa
LNDC1 1 mi38 min NW 5.1 G 8 49°F 1015.6 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 3 mi38 min NW 6 G 8
OBXC1 4 mi38 min 49°F 38°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 4 mi38 min NNW 7 G 8.9 49°F 1015.7 hPa
PXSC1 6 mi38 min 50°F 39°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 6 mi38 min SW 4.1 G 6 49°F 1014.6 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 10 mi38 min NW 8.9 G 15 49°F 1015.6 hPa
FTPC1 - 9414290 - San Francisco, CA 10 mi38 min WNW 6 G 9.9 49°F 53°F1015.7 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 12 mi33 min NW 11 48°F 1015 hPa
RCMC1 - 9414863 - Richmond, CA 12 mi38 min WNW 8 G 12 49°F 52°F1015.1 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 19 mi38 min WNW 12 G 15 47°F 1015.1 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 19 mi38 min WNW 7 G 8.9 47°F 49°F1015.2 hPa39°F
RTYC1 - 9414523 - Redwood City, CA 19 mi38 min WNW 14 G 17 49°F 53°F1016.1 hPa
UPBC1 20 mi38 min WNW 9.9 G 12
PCOC1 - 9415144 - Port Chicago, CA 23 mi38 min WSW 13 G 15 46°F 49°F1014.8 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 28 mi38 min W 9.9 G 14 47°F 1014.5 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 30 mi38 min NW 16 G 19 51°F 54°F1016.7 hPa
SFXC1 - San Francisco Bay Reserve, CA 32 mi83 min Calm 43°F 1015 hPa36°F
PRYC1 - 9415020 - Point Reyes, CA 40 mi38 min 53°F1016.1 hPa

Wind History for Alameda, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Oakland, Metro Oakland International Airport, CA6 mi75 minNW 1210.00 miOvercast50°F37°F61%1016 hPa
Hayward, Hayward Air Terminal, CA12 mi74 minWNW 310.00 miMostly Cloudy49°F36°F61%1016.9 hPa
San Francisco, San Francisco International Airport, CA12 mi72 minW 1310.00 miMostly Cloudy49°F39°F69%1015.9 hPa
San Carlos Airport, CA17 mi73 minW 1010.00 miMostly Cloudy50°F41°F71%1015.9 hPa
Concord, Buchanan Field, CA18 mi75 minNW 710.00 miMostly Cloudy48°F34°F58%1014.2 hPa
Palo Alto Airport, CA22 mi21 minWNW 1010.00 miOvercast0°F0°F%1016.3 hPa

Wind History from OAK (wind in knots)
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Last 24hrCalmCalmS4S6W8W8SW6W10W13W11W11W7SW7SW9W13W7W9W13NW6W8NW20
G25
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1 day agoN3NW5NW10NW11NW14NW8
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N7NE7N4NW33CalmNE3CalmCalmNE4E4SE3CalmE3Calm
2 days agoN7NW11
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Tide / Current Tables for Alameda, San Francisco Bay, California
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Alameda
Click for Map
Wed -- 12:47 AM PST     6.37 feet High Tide
Wed -- 06:09 AM PST     1.49 feet Low Tide
Wed -- 06:52 AM PST     Sunrise
Wed -- 07:50 AM PST     Moonset
Wed -- 12:14 PM PST     7.41 feet High Tide
Wed -- 05:53 PM PST     Sunset
Wed -- 06:44 PM PST     -0.93 feet Low Tide
Wed -- 07:28 PM PST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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6.16.35.74.4321.51.82.74.15.66.87.47.15.9420.3-0.7-0.9-0.312.64.3

Tide / Current Tables for Oakland Inner Harbor Reach, 33 ft. below datum Current
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Oakland Inner Harbor Reach
Click for MapFlood direction 82 true
Ebb direction 255 true

Wed -- 12:45 AM PST     -0.01 knots Slack
Wed -- 02:45 AM PST     -0.36 knots Max Ebb
Wed -- 05:04 AM PST     0.00 knots Slack
Wed -- 06:52 AM PST     Sunrise
Wed -- 07:50 AM PST     Moonset
Wed -- 09:49 AM PST     0.39 knots Max Flood
Wed -- 12:22 PM PST     -0.00 knots Slack
Wed -- 03:02 PM PST     -0.55 knots Max Ebb
Wed -- 05:48 PM PST     0.01 knots Slack
Wed -- 05:53 PM PST     Sunset
Wed -- 07:28 PM PST     Moonrise
Wed -- 10:36 PM PST     0.44 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.2-0.1-0.3-0.4-0.2-00.10.20.30.40.40.30.1-0.2-0.4-0.6-0.5-0.200.20.30.40.40.4

Weather Map and Satellite Images
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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 (10,2,3,4)
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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.