Saturday, March23, 2019 L-36.com


Marine Weather and Tides
Danville, 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 7:05AMSunset 7:23PM Saturday March 23, 2019 9:35 AM PDT (16:35 UTC) Moonrise 9:42PMMoonset 8:03AM Illumination 92% Phase: Waning Gibbous; Moon at 17 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- 840 Am Pdt Sat Mar 23 2019
Today..W winds 5 to 10 kt...increasing to 10 to 15 kt with gusts up to 25 kt this afternoon.
Tonight..NW winds 5 to 15 kt.
Sun..E winds 5 to 15 kt.
Sun night..S winds 10 to 20 kt with gusts up to 30 kt. Rain likely.
Mon..SW winds 20 to 30 kt with gusts up to 40 kt. Rain likely.
Mon night..E winds 5 to 10 kt. A chance of showers.
Tue..S winds up to 10 kt. Rain.
Wed..SW winds 5 to 15 kt. Rain likely.
PZZ500 840 Am Pdt Sat Mar 23 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Expect moderate to fresh winds from the northwest near the coast today in the wake of this mornings frontal passage. Winds will shift on Sunday to come out of the south and increase ahead of the next system. A long period northwest swell will move through waters into tonight before decaying on Sunday.


7 Day Forecast for Marine Location Near Danville, CA
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location: 37.79, -122     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 231522
afdmtr
area forecast discussion
national weather service san francisco bay area
822 am pdt Sat mar 23 2019

Synopsis Showers will end this morning with partly cloudy skies
and cool temperatures this afternoon. Mainly dry conditions are
expected over the weekend with additional storm systems expected
next week. These systems will bring periods of rain and breezy
conditions to the region.

Discussion As of 08:21 am pdt Saturday... A cold front
associated with a pacific trough pushed through much of the area
overnight, bringing a period of moderate to heavy rain as it
passed through. The front is currently passing through monterey
and san benito counties with clearing to the northwest. Rainfall
totals with this system have ranged from 2-3" in the north bay
mountains, 0.5-1.25" north bay valleys and santa cruz mountains,
0.25-0.75" across the sf bay area and coastal locations, and less
than 0.25" over the southeastern portion of the forecast area.

Showers will continue to move southeast and should move out of the
forecast area by noon today. Behind the front, clouds will
decrease and sunshine will increase this afternoon. Cumulus will
likely develop especially over the higher terrain and a stray
shower cannot be ruled out. Highs today will be cool behind the
front, with upper 50s to lower 60s in most locations. Breezy
northwest winds will also contribute to temperatures feeling cool
this afternoon.

High pressure will keep conditions dry through Sunday afternoon.

Highs on Sunday will rebound several degrees, with 60s in most
locations, although the warmest locations may hit 70. The next
pacific trough will approach the area on Sunday evening with rain
developing over the north bay first. A cold front will start to
push through the region on Sunday night, bringing rain to the bay
area and points north. Southerly winds will increase ahead of the
front and may become gusty near the coast and in the higher
terrain. The front will slowly move south through the day on
Monday but will weaken, therefore the highest rainfall totals will
fall across the north bay with lesser amounts to the south. A few
showers will be possible on Tuesday as the remnants of the front
remain over the region and southwest flow continues.

The next, stronger storm system will move through the area Tuesday
night into Wednesday, with a few showers lingering into Thursday.

Widespread rain will occur across the area from this system, and
many areas will likely see higher rainfall totals than the Monday
system. Ensembles favor a return to dry conditions for late next
week into the following weekend.

Prev discussion As of 2:56 am pdt Saturday... Moderate to heavy rain
is currently impacting portions of the bay area as a cold front
continues to move through the region. Latest surface analysis puts
the cold front currently bisecting the san francisco bay. Kmux
radar imagery continues to show moderate to heavy echoes along and
ahead of the front. Rainfall amounts over the last 24 hours have
been greatest across the north bay with a few jackpots of 2-3" in
the higher terrain. The recent rains have led to stream rises
across the north bay, but nothing of notable concern.

Latest short term models indicate the front will continue to
slowly push southward across the rest of the forecast area through
early Saturday morning. As the front moves from N to S steady
rainfall will diminish. This trend can already be seen with rain
already ending across the north bay. A few lingering showers will
be possible across southern areas through mid-morning, but most
areas north of monterey bay will be dry. Despite a passing cold
front, snow levels will remain just high enough to not see any
frozen precip. Profiler along the big sur coast has kept snow
levels above 6k feet. By Saturday afternoon much of the bay area
will see clearing skies, but cool temperatures. Added some patchy
fog to the forecast Saturday night for the north bay valleys
given the ample low level moisture.

Dry weather is expected for Sunday with seasonably cool
temperatures.

Rain will return to the bay area Sunday night as another cold
front is forecast to sweep across the region. Rain will initially
start over the north bay Sunday night, before spreading southward
by Monday morning. Unlike the current cold front, the Sunday
night front looks to fizzle once it gets south of san jose.

Therefore, rainfall amounts will be greatest across the north bay
and much less south of san jose. A few lingering showers will be
possible Monday afternoon evening. Some of the medium range
models keep a few showers on Tuesday as well with the dissipating
front.

Another disturbance will bring another round of rain Tuesday
night in Thursday. Finally see a drier period next Friday into
Saturday.

Aviation As of 4:40 am pdt Saturday... For 12z tafs. Cold front
is presently passing through the san francisco bay area. As of
the 12z TAF issuance, terminals are generally reportingVFR MVFR
conditions along with light to moderate rain. Rain chances will
drop off over the next 1-2 hours at most terminals in the wake of
the frontal passage withVFR conditions likely to prevail by mid-
morning onward. Can't rule out some very localized fog around
sunrise in the north bay. Will likely see some post-frontal
convective cumulus stratocumulus as the day progresses. In
addition, can't rule out a stray rain shower in the afternoon, but
chances seem rather low at this point. Winds will become west to
northwest behind the front and through the rest of the day.

Vicinity of ksfo...VFR conditions will likely prevail through the
day as the front is now to the east of the terminal. The moderate
rainfall overnight will quickly come to an end with some isolated
showers lingering for another hour or two. Will likely see
few scattered cumulus build-ups by the afternoon, generally
at above 3,000 ft. Winds will become more west to northwest by
mid-morning, increasing to around 10-15 kt by the afternoon.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Light to moderate rain will come to an
end at mry and sns in the next few hours as a cold front passes
through the area. After the rain comes to an end,VFR conditions
are forecast to prevail. Can't rule out some sct or even bkn
cumulus build-ups this afternoon. Winds will become onshore after
the frontal passage.

Marine As of 2:42 am pdt Saturday... Rain showers will decrease
in coverage through the morning hours as a front passes through
the region. Behind the front, winds will become to west to
northwest. A moderate long-period northwest swell will impact the
area through Saturday night. Winds will become southerly again on
Sunday before increasing Sunday night as another frontal system
approaches.

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... Rough bar advisory for sf bar
sca... Mry bay from 10 am
public forecast: st
aviation: rowe
marine: rowe
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LNDC1 15 mi35 min WNW 2.9 G 5.1 54°F 1022 hPa (+1.7)
AAMC1 - 9414750 - Alameda, CA 16 mi41 min W 1.9 G 4.1 54°F 57°F1022.4 hPa
UPBC1 18 mi35 min W 8.9 G 13
OKXC1 - 9414776 - Oakland (Berth 34), CA 18 mi35 min WNW 2.9 G 5.1 53°F 1022.1 hPa (+1.6)
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 18 mi35 min WNW 6 G 8.9 54°F 1021.5 hPa (+1.5)
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 18 mi35 min W 4.1 G 6
PCOC1 - 9415144 - Port Chicago, CA 18 mi35 min WSW 7 G 9.9 53°F 56°F1021.8 hPa (+1.5)
OBXC1 18 mi53 min 53°F 48°F
MZXC1 - 9415102 - Martinez-Amorco CA 18 mi35 min W 9.9 G 11 53°F 56°F1021.7 hPa (+1.4)53°F
PPXC1 - 9414847 - Richmond (Point Potrero), CA 21 mi35 min Calm G 4.1 55°F 1022.3 hPa (+1.6)
PXOC1 - 9414311 - San Francisco (Pier 1), CA 21 mi35 min W 8.9 G 12 53°F 1021 hPa (+1.5)
PXSC1 21 mi35 min 55°F 47°F
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 23 mi35 min W 6 G 8.9 53°F 1021.7 hPa (+1.6)
RTYC1 - 9414523 - Redwood City, CA 23 mi35 min WNW 6 G 8 53°F 60°F1022.7 hPa (+1.7)
RCMC1 - 9414863 - Richmond, CA 24 mi35 min WNW 5.1 G 7 53°F 56°F1021.8 hPa (+1.5)
FTPC1 - 9414290 - San Francisco, CA 25 mi35 min WSW 6 G 9.9 53°F 56°F1022.3 hPa (+1.5)
TIBC1 - Tiburon Pier, San Francisco Bay, CA 25 mi30 min NW 1.9 55°F 1022 hPa
SFXC1 - San Francisco Bay Reserve, CA 28 mi110 min WNW 1.9 51°F 1021 hPa50°F
46237 - San Francisco Bar, CA (142) 34 mi65 min 55°F9 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 45 mi35 min NNW 9.7 G 14 54°F 55°F1022.9 hPa (+1.5)

Wind History for Alameda, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Hayward, Hayward Air Terminal, CA11 mi41 minNW 310.00 miPartly Cloudy64°F48°F56%1022.8 hPa
Livermore, Livermore Municipal Airport, CA11 mi42 minW 38.00 miOvercast52°F48°F89%1021.4 hPa
Concord, Buchanan Field, CA13 mi42 minSW 310.00 miFair54°F46°F77%1020.4 hPa
Oakland, Metro Oakland International Airport, CA13 mi42 minNW 310.00 miPartly Cloudy55°F51°F87%1022.1 hPa
San Carlos Airport, CA22 mi48 minW 410.00 miMostly Cloudy54°F48°F82%1022 hPa
Palo Alto Airport, CA22 mi48 minW 410.00 miPartly Cloudy54°F48°F82%1022.3 hPa
San Francisco, San Francisco International Airport, CA22 mi39 minW 109.00 miA Few Clouds54°F46°F77%1021.7 hPa

Wind History from LVK (wind in knots)
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Last 24hrCalmCalmE4CalmW3SW5SW4E3SW3S3CalmS4E3E3NE3CalmSW4SW4SW6E3CalmNW3CalmW3
1 day agoCalmSW4CalmCalmSW5NW8W4W14W13
G19
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2 days agoS6S8S9SW8W15W12SW14W14W10W11W8W6CalmSE3CalmCalmCalmCalmCalmCalmCalmNE3E3Calm

Tide / Current Tables for Roberts Landing, 1.3 miles west of, San Francisco Bay, California
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Roberts Landing
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Sat -- 02:47 AM PDT     7.50 feet High Tide
Sat -- 07:07 AM PDT     Sunrise
Sat -- 09:04 AM PDT     Moonset
Sat -- 09:24 AM PDT     0.13 feet Low Tide
Sat -- 03:23 PM PDT     6.70 feet High Tide
Sat -- 07:23 PM PDT     Sunset
Sat -- 09:31 PM PDT     1.18 feet Low Tide
Sat -- 10:42 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.367.27.56.95.742.20.90.20.31.32.84.45.86.66.65.84.63.11.91.31.32.1

Tide / Current Tables for Oakland Harbor High Street Bridge, San Francisco Bay, California Current
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Oakland Harbor High Street Bridge
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Sat -- 02:09 AM PDT     -0.01 knots Slack
Sat -- 04:48 AM PDT     -1.87 knots Max Ebb
Sat -- 07:08 AM PDT     Sunrise
Sat -- 08:49 AM PDT     0.01 knots Slack
Sat -- 09:04 AM PDT     Moonset
Sat -- 11:30 AM PDT     1.96 knots Max Flood
Sat -- 02:55 PM PDT     -0.00 knots Slack
Sat -- 05:14 PM PDT     -1.44 knots Max Ebb
Sat -- 07:23 PM PDT     Sunset
Sat -- 09:03 PM PDT     0.00 knots Slack
Sat -- 10:42 PM PDT     Moonrise
Sat -- 11:39 PM PDT     1.63 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.71.10.2-0.9-1.7-1.9-1.6-1.2-0.60.21.21.91.91.50.9-0.1-1-1.4-1.3-1-0.6-00.81.5

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 (12,3,4,5)
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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.