Friday, February22, 2019 L-36.com


Marine Weather and Tides
Emeryville, 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 6:48AMSunset 5:56PM Friday February 22, 2019 1:06 AM PST (09:06 UTC) Moonrise 9:49PMMoonset 9:02AM Illumination 91% Phase: Waning Gibbous; Moon at 18 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 San Francisco Bay North Of The Bay Bridge- 752 Pm Pst Thu Feb 21 2019
.small craft advisory in effect until 11 pm pst this evening...
Tonight..N winds 15 to 25 kt.
Fri..NW winds 5 to 15 kt.
Fri night..W winds 5 to 15 kt...decreasing to 5 to 10 kt after midnight.
Sat..W winds 5 to 15 kt.
Sat night..W winds 5 to 15 kt. Slight chance of rain.
Sun..S winds 5 to 15 kt. Slight chance of rain, then chance of rain.
Mon..S winds 5 to 15 kt. Rain likely.
Tue..S winds 10 kt. Rain, then chance of rain.
PZZ500 752 Pm Pst Thu Feb 21 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Gusty northwesterly winds will continue across the waters tonight. Winds will generate steep fresh swell creating hazardous conditions, especially for smaller vessels. Winds will then diminish Friday through the weekend. Moderate northwest swell will continue into next week.


7 Day Forecast for Marine Location Near Emeryville, CA
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location: 37.85, -122.29     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 220511
afdmtr
area forecast discussion
national weather service san francisco bay area
911 pm pst Thu feb 21 2019

Synopsis Cool and dry weather conditions will continue across
most of the forecast area through the weekend, except for rain
chances in the north bay from Saturday afternoon through Sunday.

Rain will become likely across the north bay early next week, and
rain may shift southward across the rest of the san francisco bay
area as well. Warmer temperatures are forecast next week,
especially during the overnight hours.

Discussion As of 9:10 pm pst Thursday... Scattered showers
developed late this afternoon over the higher terrain of southern
monterey county and southern san benito county, and lightning
strikes were detected farther to the south over san luis obispo
county. All of that convective activity quickly dissipated after
sunset and mostly clear skies are expected overnight.

Much drier air mixed into the boundary layer today and early
evening dewpoints are running about 15 degrees drier than at the
same time last evening. This drier airmass should result in even
cooler overnight temperatures than last night's chilly readings.

However, much will depend on winds. Light to moderate northerly
winds continue across the region this evening which is keeping
temps from cooling as fast as otherwise would be expected. The
expectation is that winds at lower elevations will decrease
overnight as the nocturnal inversion develops. However, the latest
local WRF model indicates gusty northerly winds persisting in the
hills overnight. These winds in the hills may mix locally to the
surface at times and help keep temps up a bit overnight. The
latest model guidance indicate that overnight lows tonight will be
slightly cooler than last night in most locations. This will mean
widespread lows in the 30s, with some upper 20s likely in the
coldest inland valleys of the sf bay area, and some mid 20s
possible in the interior valleys of monterey and san benito
counties. Areas of early morning frost are likely on Friday,
especially in the valleys.

The upper trough that brought a cold airmass south into our
region yesterday is currently centered over southern california.

This trough is forecast to shift eastward over arizona by Friday
afternoon, allowing a weak shortwave ridge to develop over
california. The airmass under this ridge will moderate slightly,
resulting in a slight increase in afternoon highs on Friday, and
somewhat more mild temperatures Friday night. Even so,
temperatures will remain several degrees cooler than normal and
patchy frost is likely once again in the coolest valleys late
Friday night and early Saturday morning.

Dry conditions are forecast to persist across our entire region
through at least Saturday morning. And, based on the lastest nam
and gfs, dry conditions will likely persist on through the
weekend, along with a continued gradual warming trend. Only the
north bay appears to have any potential for weekend rain, and then
only from late Saturday through Sunday across the northern
portions of sonoma and napa counties. A recent forecast update
included a reduction in rain chances in the north bay over the
weekend, and a removal of any mention of rain chances south of the
golden gate through Sunday.

The models agree that the upper ridge centered offshore along 140w
will amplify over the weekend and pinch off over alaska. This will
allow a moist wsw flow, originating near hawaii, to undercut the
ridge and interact with a cold trough dropping south out of
british columbia. These developments will likely result in
moderate to locally heavy precipitation somewhere along the west
coast, starting on Sunday and continuing through the middle of
next week. The only question is where this precipitation will be
focused. Latest models agree in keeping nearly all of the
precipitation north of our forecast area through the weekend. The
00z GFS then slowly shifts rainfall south into the bay area from
late Sunday night through Tuesday and generates pretty hefty
amounts of rainfall in the bay area early next week. The 12z
ecmwf, on the other hand, keeps the frontal boundary focused on
northwest california and therefore forecasts much less rainfall in
our area early next week, particularly for areas south of the
golden gate. Thus, our rainfall forecast for early next week is
low confidence at this time. One aspect of the forecast for early
next week that is more certain is temperatures. Much warmer
temperatures are forecast during the first half of next week,
especially overnight. Overnight lows by next Monday night will be
as much as 20 degrees warmer compared to tonight.

The models agree a bit better during the second half of next week,
with shortwave ridging expected to maintain dry and mild weather
across all except perhaps the north bay. More widespread rain is
then possible by the following weekend.

Aviation As of 9:00 pm pst Thursday...VFR through the period
as the air mass steadily dries out and a reinforcement of colder
air arrives from the ne-e this evening per ECMWF and GFS theta-e
forecasts; during the transition winds at the surface and aloft
may stay gusty longer into the evening before trending to a
lighter offshore wind flow. Ideal nocturnal radiative cooling
conditions tonight results in cold air drainage winds coupling
with light offshore wind flow. Increasing near surface stability
overnight should generally cause the surface winds to decouple
from winds aloft except in locations typically favoring cold air
drainage winds in the valleys. Not enough to mention in tafs
presently, but marginal low level wind shear is possible overnight
into Friday morning.

Vicinity of ksfo...VFR, wind gusting to 20-25 kt this evening.

Lighter winds by late tonight into early Friday morning.

Sfo bridge approach... Similar to sfo.

Monterey bay terminals...VFR, NW wind gusts to 20-25 kt this
evening, winds gradually becoming e-se late tonight 5-10 knots
tonight. E-se cold air drainage winds returning to light onshore
winds by mid to late Friday afternoon.

Marine As of 7:52 pm pst Thursday... Gusty northwesterly winds
will continue across the waters tonight. Winds will generate steep
fresh swell creating hazardous conditions, especially for smaller
vessels. Winds will then diminish Friday through the weekend.

Moderate northwest swell will continue into next week.

Mtr watches warnings advisories
Tngt 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... Pt arena to pt reyes 0-10 nm
sca... Pt reyes to pigeon pt 0-10 nm
sca... Pigeon pt to pt piedras blancas 10-60 nm
sca... Rough bar advisory for sf bar
sca... Mry bay until 3 am
sca... Sf bay until 11 pm
public forecast: dykema
aviation: canepa
marine: canepa
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
OBXC1 4 mi48 min 50°F 24°F
LNDC1 4 mi48 min N 11 G 17 49°F 1013.8 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 4 mi48 min NNE 22 G 28 49°F 1013.9 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 4 mi48 min N 20 G 25
AAMC1 - 9414750 - Alameda, CA 5 mi54 min N 8 G 14 49°F 52°F1014.2 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 6 mi48 min N 14 G 21 50°F 1014.6 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 7 mi48 min NNW 18 G 23 50°F 1013.4 hPa
PXSC1 7 mi48 min 51°F 27°F
RCMC1 - 9414863 - Richmond, CA 8 mi48 min 52°F
TIBC1 - Tiburon Pier, San Francisco Bay, CA 9 mi73 min N 17 50°F 1014 hPa (+2.0)
FTPC1 - 9414290 - San Francisco, CA 10 mi54 min N 18 G 22 51°F 53°F1014.3 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 14 mi48 min NNW 9.9 G 12 46°F 1014.4 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 15 mi48 min N 8.9 G 13 48°F 48°F1014.3 hPa21°F
UPBC1 16 mi48 min NNE 16 G 20
PCOC1 - 9415144 - Port Chicago, CA 19 mi48 min N 11 G 15 48°F 49°F1014.4 hPa
RTYC1 - 9414523 - Redwood City, CA 24 mi48 min NNW 11 G 13 48°F 53°F1014.8 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 25 mi48 min NNE 20 G 23 47°F 1013.9 hPa
SFXC1 - San Francisco Bay Reserve, CA 28 mi81 min NNE 8 44°F 1014 hPa17°F
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 30 mi46 min N 18 G 21 52°F 55°F1014.9 hPa
PRYC1 - 9415020 - Point Reyes, CA 38 mi48 min 53°F1014.9 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, CA11 mi73 minN 710.00 miFair48°F19°F33%1014 hPa
Concord, Buchanan Field, CA16 mi73 minN 1210.00 miFair47°F21°F36%1012.6 hPa
Hayward, Hayward Air Terminal, CA16 mi72 minNNW 310.00 miFair47°F21°F37%1014.7 hPa
San Francisco, San Francisco International Airport, CA16 mi70 minN 24 G 2810.00 miFair and Windy51°F28°F41%1013.3 hPa
San Carlos Airport, CA22 mi66 minN 710.00 miFair48°F23°F37%1014.2 hPa

Wind History from OAK (wind in knots)
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Last 24hrNW4NW10N7N7N6N6NW10NW10NW9NW11NW12
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1 day agoNW6W8NW20
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2 days agoNE4E4SE3CalmE3CalmCalmCalmS4S6W8W8SW6W10W13W11W11W7SW7SW9W13W7W9W13

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 Berkeley Yacht Harbor, California Current
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Berkeley Yacht Harbor
Click for Map
Fri -- 02:41 AM PST     -0.00 knots Slack
Fri -- 05:01 AM PST     -0.25 knots Max Ebb
Fri -- 06:50 AM PST     Sunrise
Fri -- 08:03 AM PST     0.00 knots Slack
Fri -- 09:02 AM PST     Moonset
Fri -- 11:23 AM PST     0.35 knots Max Flood
Fri -- 02:52 PM PST     -0.00 knots Slack
Fri -- 05:21 PM PST     -0.27 knots Max Ebb
Fri -- 05:55 PM PST     Sunset
Fri -- 08:31 PM PST     0.00 knots Slack
Fri -- 09:49 PM PST     Moonrise
Fri -- 11:52 PM PST     0.35 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.30.1-0.1-0.2-0.2-0.2-0.1-00.10.30.30.30.30.1-0-0.2-0.3-0.3-0.2-0.10.10.20.3

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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for San Francisco/Monterey Bay Area, CA (4,6,7,8)
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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.