Monday, March18, 2019 L-36.com


Marine Weather and Tides
Fremont, 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 7:12AMSunset 7:18PM Monday March 18, 2019 6:38 PM PDT (01:38 UTC) Moonrise 3:46PMMoonset 4:57AM Illumination 96% Phase: Waxing Gibbous; Moon at 13 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- 217 Pm Pdt Mon Mar 18 2019
Rest of today..E winds 5 to 15 kt.
Tonight..SW winds 5 to 15 kt.
Tue..SW winds 5 to 15 kt with gusts up to 25 kt.
Tue night..SW winds 5 to 15 kt. Showers likely.
Wed..SW winds 5 to 15 kt with gusts up to 25 kt. Showers likely.
Wed night..W winds 10 to 20 kt with gusts up to 25 kt. A chance of showers.
Thu..W winds 10 to 20 kt with gusts up to 25 kt.
Fri..SW winds 5 to 10 kt. Showers likely.
PZZ500 217 Pm Pdt Mon Mar 18 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Winds will become more southerly into this evening ahead of an approaching low pressure system moving in from the west. Southerly winds will increase along with rain chances on Tuesday as a cold front moves through the region. Winds will turn back out of the west to northwest on Wednesday. A long period westerly swell will arrive tomorrow, increasing shoaling on bars and harbor entrances is anticipated.


7 Day Forecast for Marine Location Near Fremont, CA
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location: 37.45, -121.96     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 190113 cca
afdmtr
area forecast discussion... Corrected aviation discussion
national weather service san francisco bay area
607 pm pdt Mon mar 18 2019

Synopsis A marine layer has developed and stratus now covers
much of the coast. Otherwise skies are mostly clear. Low
cloudiness will extend locally inland around the bays overnight
and then on Tuesday mid and high cloudiness will spread in ahead
of an approaching pacific weather system. A cooling trend will
begin, with showers expected by Tuesday night and Wednesday. The
pattern will then remain progressive through the forecast period
with intervals of unsettled weather conditions.

Discussion As of 03:15 pm pdt Monday... Clear and unseasonably
mild temperatures prevail inland, but stratus has now returned to
just about all of our coast. Although far from a classic case,
there were embedded hints of a southerly stratus surge, remarkable
for this early in the season. And, as in the more prototypical
late spring and summer stratus surge events, its arrival heralds
the end of a period of offshore flow and warm weather even near
the beaches, and the return of the marine layer and cooler onshore
flow. Temperatures this afternoon are generally running 3 to 5
degs warmer than on Sunday, aside from coastal locations,
especially those more exposed to the southwesterly flow. The asos
at watsonville airport, for example, reported a temperature of 75
deg at 2 pm yesterday while just 65 deg 2 pm today.

Forecast models remain in good agreement that a negatively tilted
upper level trough and associated showers will move in to the
district from the southwest Tuesday night and Wednesday. Timing of
the precip onset varies somewhat between the models, but a
consensus view has it spreading northward through the central sf
bay area Wednesday morning. Although not a particularly cold
system, the center of the upper low will pass inland in the
vicinity of our CWA with 500 mb temps down to around -25 deg c. In
conjunction with some Sun breaks and mid-march diurnal heating,
can't rule out the possibility of thunderstorm development
Wednesday afternoon. Chances presently appear largest in the far
southeastern portion of our district, and so have introduced in
the grids and forecast there. This might however need to be
expanded as the time frame approaches.

Shower chances look to diminish Wednesday night and Thursday, with
dry conditions returning districtwide Thursday night. But then the
next weather system is projected to rapidly approach, this time
from the northwest, with rain spreading southward through most
of our area Friday afternoon and evening.

Latest GFS and ECMWF ensemble output continue unsettled weather
conditions through the remainder of the forecast period, and
actually potentially through much of the rest of the month, with
interspersed periods of wet and dry conditions and temperatures
near or a bit below seasonal norms.

Aviation As of 6:07 pm pdt Monday... It'sVFR except along the
immediate coastline there are patches of ifr-lifr in stratus fog.

A surface ridge is located along the coastline steepening the smx-
sfo pressure gradient to 2.5 mb; patchy stratus and fog are
embedded in the southerly winds along the coast while it's clear
inland except for scattered late day convective clouds well
inland. The marine layer varies in depth from near sea level to
approx 1,000 feet.

Eddy circulations along the coast complicating the forecast
picture in the nearest term for stratus fog coverage, but overall
thinking is to go near persistence as long as the southerly
component holds for the evening, pressure gradients and responding
wind fields should relax tonight with late winter nocturnal hours
cooling smoothing out current diurnal land-ocean temperature
contrasts. Marine temperature inversions weakening somewhat
overnight due to cool air advection at 925 mb level, it's much
drier AOA 925 mb tonight into Tuesday thus any morning patchy ifr-
lifr should rapidly dissipate, otherwiseVFR.

Vicinity of ksfo...VFR. Nw-w wind near 15 knots until mid evening,
lighter wind tonight becoming e-se overnight.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Some characteristics of a southerly surge
arrived mainly earlier on today, but mostly atypical in stratus and
fog behavior at present time. Surface winds are complex, kmry
previously had a SW wind, but has recently shifted to NE while
ksns has NW wind; eddy circulation spin up spin down with exposure
to drier air 1-2 thousand feet agl eroding stratus and fog. 00z
tafVFR at kmry tempo ifr ceiling 13z-17z Tuesday,VFR ksns tempo
ifr 03z-06z this evening. Once Sun sets, nocturnal cooling sets in
will have better look at stratus fog coverage and make any needed
adjustments to tafs by 06z cycle.

Marine As of 2:17 pm pdt Monday... Winds will become more
southerly into this evening ahead of an approaching low pressure
system moving in from the west. Southerly winds will increase
along with rain chances on Tuesday as a cold front moves through
the region. Winds will turn back out of the west to northwest on
Wednesday. A long period westerly swell will arrive tomorrow,
increasing shoaling on bars and harbor entrances is anticipated.

Mtr watches warnings advisories
Tngt None.

Public forecast: blier
aviation: canepa
marine: as
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 14 mi38 min NNW 12 G 14 60°F 62°F1013.3 hPa (-0.3)
LNDC1 29 mi38 min NNW 8 G 9.9 60°F 1013.1 hPa (-0.4)
AAMC1 - 9414750 - Alameda, CA 29 mi38 min NW 2.9 G 5.1 1013.5 hPa (-0.4)
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 31 mi38 min W 2.9 G 4.1
OBXC1 32 mi38 min 57°F 53°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 32 mi38 min WNW 6 G 7 56°F 1013.2 hPa (-0.3)
PXOC1 - 9414311 - San Francisco (Pier 1), CA 33 mi38 min W 6 G 8.9 58°F 1012.3 hPa (-0.5)
PXSC1 34 mi38 min 60°F 52°F
FTPC1 - 9414290 - San Francisco, CA 36 mi38 min SSW 2.9 G 12 1013.8 hPa (-0.8)
PPXC1 - 9414847 - Richmond (Point Potrero), CA 38 mi38 min S 6 G 8 58°F 1013.5 hPa (-0.3)
TIBC1 - Tiburon Pier, San Francisco Bay, CA 40 mi99 min E 2.9 61°F 1013 hPa (-1.0)
RCMC1 - 9414863 - Richmond, CA 40 mi38 min SSE 2.9 G 5.1 1012.9 hPa (-0.3)
MZXC1 - 9415102 - Martinez-Amorco CA 41 mi38 min NNE 1.9 G 2.9 70°F 56°F1012.7 hPa (-0.9)46°F
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 41 mi38 min ENE 5.1 G 5.1 71°F 1012.4 hPa (-1.0)
UPBC1 42 mi38 min NE 2.9 G 4.1
PCOC1 - 9415144 - Port Chicago, CA 42 mi38 min NNW 2.9 G 2.9 70°F 56°F1012.7 hPa (-0.9)
ELXC1 - Elkhorn Slough Reserve, CA 45 mi113 min NNW 7 55°F 1014 hPa51°F
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 45 mi38 min WSW 7 G 8.9 64°F 1012.5 hPa (-0.6)
MLSC1 - Moss Landing, South Harbor, CA 46 mi36 min WSW 4.1 G 8.9 53°F 1014.7 hPa (-0.9)50°F
46092 - MBM1 48 mi84 min WSW 3.9 52°F 56°F1014.4 hPa (-1.0)

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Mountain View, Moffett Field, CA5 mi42 minNW 710.00 miFair66°F54°F65%1013.2 hPa
San Jose, San Jose International Airport, CA6 mi45 minNW 710.00 miPartly Cloudy71°F52°F51%1012.4 hPa
Palo Alto Airport, CA9 mi51 minNNW 1010.00 miPartly Cloudy63°F55°F77%1012.9 hPa
San Jose / Reid / Hillv, CA11 mi51 minW 610.00 miClear77°F33°F21%1012.2 hPa
San Carlos Airport, CA16 mi97 minN 1210.00 miClear73°F48°F41%1012.5 hPa
Hayward, Hayward Air Terminal, CA17 mi44 minNNW 910.00 miA Few Clouds74°F48°F41%1013.4 hPa
Livermore, Livermore Municipal Airport, CA19 mi45 minNE 410.00 miFair73°F50°F44%1012.2 hPa
Oakland, Metro Oakland International Airport, CA22 mi45 minNNW 710.00 miPartly Cloudy66°F48°F52%1013.1 hPa
San Francisco, San Francisco International Airport, CA24 mi42 minWNW 1410.00 miA Few Clouds59°F48°F69%1012.4 hPa

Wind History from NUQ (wind in knots)
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Last 24hrNW6N3NW4CalmS3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmN3CalmN4NE35N9N10N11NW7
1 day agoN11N7N4CalmCalmCalmCalmCalmCalmW3CalmCalmCalmCalmCalmNE3N3CalmCalmN6NW5NW6N5N6
2 days agoN6W4N4NW5CalmS3CalmCalmCalmCalmCalmCalmCalmCalmCalmNW5N8N4N5N6N6N7N7N7

Tide / Current Tables for Coyote Creek, Tributary #1, San Francisco Bay, California
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Coyote Creek
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Mon -- 12:13 AM PDT     7.68 feet High Tide
Mon -- 05:56 AM PDT     Moonset
Mon -- 06:33 AM PDT     1.82 feet Low Tide
Mon -- 07:14 AM PDT     Sunrise
Mon -- 11:16 AM PDT     8.83 feet High Tide
Mon -- 04:45 PM PDT     Moonrise
Mon -- 07:14 PM PDT     -1.04 feet Low Tide
Mon -- 07:17 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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7.67.56.65.23.82.61.923.35.47.58.88.77.86.34.42.40.7-0.5-1-0.613.25.6

Tide / Current Tables for Dumbarton Point 2.3 mi NE, South San Francisco Bay, California Current
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Dumbarton Point 2.3 mi NE
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Mon -- 03:49 AM PDT     -0.88 knots Max Ebb
Mon -- 05:56 AM PDT     0.01 knots Slack
Mon -- 05:56 AM PDT     Moonset
Mon -- 07:15 AM PDT     Sunrise
Mon -- 08:30 AM PDT     1.32 knots Max Flood
Mon -- 11:24 AM PDT     -0.01 knots Slack
Mon -- 04:02 PM PDT     -1.57 knots Max Ebb
Mon -- 04:46 PM PDT     Moonrise
Mon -- 06:39 PM PDT     0.01 knots Slack
Mon -- 07:18 PM PDT     Sunset
Mon -- 09:25 PM PDT     1.76 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0-0.4-0.7-0.8-0.9-0.60.10.81.31.310.3-0.3-0.8-1.2-1.5-1.6-1.3-0.60.41.31.71.71.3

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 (21,6,7,8)
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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.