Wednesday, March20, 2019 L-36.com


Marine Weather and Tides
Santa Clara, 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 7:09AMSunset 7:20PM Wednesday March 20, 2019 2:10 PM PDT (21:10 UTC) Moonrise 6:12PMMoonset 6:17AM Illumination 100% Phase: Full Moon; Moon at 15 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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PZZ560 Coastal Waters From Pigeon Point To Point Pinos California Out To 10 Nm- 1232 Pm Pdt Wed Mar 20 2019
.small craft advisory in effect until 6 pm pdt this evening...
Today..SW winds 10 to 20 kt with gusts up to 25 kt...becoming W 10 to 15 kt this afternoon. Wind waves 3 to 4 ft this morning... Becoming 2 ft or less. W swell 8 to 10 ft at 15 seconds and S 1 to 2 ft at 15 seconds. Showers and a slight chance of Thunderstorms this morning, then a chance of showers this afternoon.
Tonight..S winds 5 to 10 kt. Wind waves 2 ft or less. W swell 8 to 9 ft at 14 seconds and S 1 to 2 ft at 16 seconds. A slight chance of showers.
Thu..S winds 5 to 15 kt. Wind waves 2 ft or less. W swell 7 to 8 ft at 17 seconds and S 1 to 2 ft at 15 seconds. A slight chance of showers.
Thu night..W winds up to 10 kt. Wind waves 2 ft or less. W swell 6 to 7 ft at 18 seconds and S 1 to 2 ft at 15 seconds.
Fri..S winds 5 to 15 kt. Wind waves 2 ft or less. W swell 5 to 8 ft at 18 seconds and S 1 to 2 ft at 14 seconds. Rain likely.
Fri night..SW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. W swell 7 to 10 ft at 16 seconds and S 1 to 2 ft at 14 seconds. Rain.
Sat..NW winds 5 to 15 kt. Wind waves 2 ft or less. W swell 10 to 12 ft and S 1 to 2 ft.
Sun..SW winds up to 10 kt. Wind waves 2 ft or less. W swell 7 to 10 ft and S 1 to 2 ft. Winds and wind waves higher in and near Thunderstorms.
PZZ500 1232 Pm Pdt Wed Mar 20 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Southerly winds will continue to gradually veer out of the west over the coastal waters this morning behind the cold front. A combination of west swell and locally generated wind waves will allow for hazardous sea conditions to continue today, particularly for smaller vessels. Another west to northwest swell will arrive this weekend.


7 Day Forecast for Marine Location Near Santa Clara, CA
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location: 37.38, -121.9     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 201731
afdmtr
area forecast discussion
national weather service san francisco bay area
1031 am pdt Wed mar 20 2019

Synopsis Rain showers will persist over the region this morning
before diminishing in coverage this afternoon. Isolated showers
may linger across the central coast tonight into early Thursday
morning yet most locations will remain dry. Another frontal system
pushes across the region on Friday with mainly dry weather
expected Saturday into Sunday. Unsettled weather returns for the
first half of next week along with seasonably cool temperatures.

Discussion As of 08:45 am pdt Wednesday... Latest radar imagery
shows the last of the main surge of precipitation is lifting
northeastward out of the north bay at this hour. Precipitation
totals came in close to previous estimates, with 1.00-2.00 inches
of rain over the higher terrain of the big sur and santa cruz
mountains, and generally around 1 4-1 2" (and locally higher) of
rain for most urban locations. That said, additional rainfall is
anticipated to fall in the form of scattered showers and
potentially an isolated thunderstorm or two through the day today,
though the majority of the rain from this system has passed. Peak
wind gusts, similarly, were on target with gusts late yesterday
ranging from 40 to 50 mph in the windier locations. Temperatures
are actually a few degrees warmer this morning versus 24 hours ago
owing to the higher dew points and nocturnal insulating cloud
cover, though daytime temperatures are expected to be below
seasonal normals for this time of the year (mid 50s to low 60s).

Speaking of this time of the year, spring officially begins at
258pm later today!
a secondary disturbance will traverse the backside of the broader
trough later today and into tonight which will spawn a secondary
weaker pulse of showery activity across the broader region. Short
term models continue to struggle defining where and when this
showery activity will develop, though the latest trends are
towards pulling rain farther offshore and mainly over the
orographically enhanced regions of the higher terrain and sierra
nevada inland. This means most lower lying urban areas should see
only lighter accumulations if any. These showers will pop up late
tonight and taper off through Thursday morning, mainly over the
higher terrain.

A transitory ridge will develop through most of Thursday with a
slight warming drying trend evident through the day. Another storm
system will arrive from the gulf of alaska by sunrise Friday,
impacting the north bay first before shifting southward throughout
the day Friday. Precipitation amounts will be highest over the
north bay and progressively lower the farther southward inland the
system progresses. A few lingering showers are possible into early
Saturday however most of the weekend will see a general
drying warming trend as another ridge passes overhead.

A third storm system will impact the region early next week. Mid
and long term models and ensemble members are peppering the mon-
wed period with various amounts of precipitation though there is
little consensus on the coverage or intensity of this rain.

Models do seem to be converging on the Monday morning timeframe
for an initial arrival time of the rains, though they disagree on
the duration or when if there will be breaks in the rain through
wed with the euro coming in noticeably wetter than other models.

See previous discussion for more information about the current
forecast package.

Previous discussion As of 03:48 am pdt Wednesday... Rain
showers are currently spreading inland across much of the region
this morning as a negatively tilted mid upper level trough
approaches the coast. Rainfall during the past 6 hours has been
greatest over the santa cruz mountains and along the santa lucia
range with 0.50" to 1.00" reported. Elsewhere, rainfall amounts
range from a few hundredths of an inch to around 0.25". Expecting
showers to spread northward through the remainder of the morning
before tapering off through the afternoon. While isolated showers
may linger into the late afternoon and evening, most areas will
see mainly dry conditions. A secondary short-wave disturbance
forecast to approach the coast late tonight into Thursday will
produce rain showers mainly offshore and over portions of the
central coast while most areas will remain dry through Thursday
night.

Another quick moving system will push a frontal boundary through the
region on Friday with light rain spreading from north to south.

Showers will then linger into Friday night before tapering off
Saturday morning. This will result in mainly dry conditions through
the first half of Sunday along with slightly warmer daytime
temperatures.

Medium range forecast models and ensemble members continue to
suggest a return to unsettled weather conditions during the first
half of next week. However, confidence remains low on the details
with respect to when, where and how much precipitation to expect.

Overall, look for periods of wet weather early next week with the
potential for more widespread rainfall and seasonably cool
temperatures.

Aviation As of 10:31 am pdt Wednesday... For 18z tafs. MVFR
conditions expected to continue into the afternoon with vis
temporarily reduced during heavier showers. The main band of
showers has already moved through this morning, but expect
scattered showers to linger into tonight. Additionally, there is a
slight chance of isolated thunderstorms today, but confidence is
low therefore vcts kept out of the tafs. Winds will continue to
gradually veer from out of the S SE to out of the W SW into this
afternoon and is forecast increase in speed through the early
evening. CIGS expected to lift toVFR late this afternoon and
become more scattered, although occasional bkn MVFR CIGS through
tomorrow morning will be possible.

Vicinity of ksfo... MVFR conditions to prevail through much of the
day along with scattered showers. CIGS will become more widely
scattered late this afternoon, but occasional MVFR bkn CIGS are
still possible into tomorrow morning. Showers will taper off this
evening and tonight. Patchy low CIGS possible around the bay area
tomorrow morning. SW winds to continue through late tonight with
winds gusting 20-25 kt this afternoon. Winds to diminish overnight.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... MVFRVFR conditions through the day with
rain rain showers impacting mry and sns. Winds will turn more
westerly through the rest of the morning and by mid-day. Showers
will linger into the late afternoon. Expecting CIGS to lift into
this evening.

Marine As of 08:45 am pdt Wednesday... Southerly winds will
continue to gradually veer out of the west over the coastal waters
this morning behind the cold front. A combination of west swell
and locally generated wind waves will allow for hazardous sea
conditions to continue today, particularly for smaller vessels.

Another west to northwest swell will arrive this weekend.

Mtr watches warnings advisories
Tday Sca... Pt reyes to pigeon pt 0-10 nm
sca... Pigeon pt to pt pinos 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 until 3 pm
sca... Pt pinos to pt piedras blancas 0-10 nm until 3 pm
sca... Pt arena to pt reyes 0-10 nm
sca... Rough bar advisory for sf bar
public forecast: drp
aviation: as
marine: as
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 19 mi41 min W 9.9 G 15 57°F 61°F1018 hPa
AAMC1 - 9414750 - Alameda, CA 34 mi41 min WSW 8.9 G 9.9
LNDC1 35 mi41 min W 8 G 13 57°F 1017.4 hPa
OBXC1 37 mi41 min 56°F 47°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 37 mi41 min WSW 12 G 16
OKXC1 - 9414776 - Oakland (Berth 34), CA 38 mi41 min WSW 8 G 13 57°F 1017.5 hPa
PXSC1 39 mi41 min 58°F 44°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 39 mi41 min WSW 8 G 13 57°F 1016.6 hPa
ELXC1 - Elkhorn Slough Reserve, CA 40 mi86 min WNW 7 57°F 1018 hPa51°F
MLSC1 - Moss Landing, South Harbor, CA 40 mi30 min WSW 8 G 21 56°F 1018.5 hPa (+0.5)51°F
FTPC1 - 9414290 - San Francisco, CA 42 mi41 min W 8 G 13
46092 - MBM1 44 mi57 min SW 7.8 56°F 55°F1018.1 hPa (+1.3)
PPXC1 - 9414847 - Richmond (Point Potrero), CA 44 mi47 min SW 12 G 16 57°F 1017.6 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 46 mi48 min WNW 2.9 57°F 1018 hPa
RCMC1 - 9414863 - Richmond, CA 46 mi41 min SW 6 G 9.9 56°F
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 46 mi41 min WNW 7 G 13 59°F 1016.7 hPa
UPBC1 47 mi41 min W 21 G 23
PCOC1 - 9415144 - Port Chicago, CA 47 mi41 min WSW 12 G 19 58°F 56°F1017 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 47 mi41 min WSW 14 G 20 57°F 56°F1017 hPa48°F
46237 - San Francisco Bar, CA (142) 48 mi71 min 55°F8 ft
46042 - MONTEREY - 27NM West of Monterey Bay, CA 49 mi81 min WSW 7.8 G 9.7 56°F 56°F10 ft1017.7 hPa (+1.5)

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Jose, San Jose International Airport, CA2 mi18 minNW 910.00 miMostly Cloudy61°F46°F60%1016.8 hPa
San Jose / Reid / Hillv, CA5 mi3.3 hrsSE 106.00 miFog/Mist59°F50°F72%1016.3 hPa
Mountain View, Moffett Field, CA9 mi75 minWNW 510.00 miOvercast60°F46°F60%1017.8 hPa
Palo Alto Airport, CA14 mi24 minWSW 8 G 1610.00 miMostly Cloudy61°F46°F59%1017.3 hPa
San Carlos Airport, CA21 mi2.4 hrsSW 7 G 166.00 miMostly Cloudy55°F48°F77%1017.3 hPa
Hayward, Hayward Air Terminal, CA23 mi17 minW 910.00 miMostly Cloudy64°F46°F54%1018.2 hPa
Livermore, Livermore Municipal Airport, CA23 mi18 minW 1510.00 miLight Rain58°F46°F67%1016.5 hPa

Wind History from SJC (wind in knots)
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SW6SW6S6SE5SE6SE11SE11SE6SE7SE8SE9SE9CalmW5W9NW9
1 day ago3CalmNW8NW7NW8NW5N9CalmNW5NW6NW5CalmE3CalmSE5E3CalmSE3S5SE3CalmSE7SE5SE10
2 days agoNW9NW8NW5NW6NW7NW4W5S4S4CalmCalmCalmCalmCalmS3CalmSE3SE3S3CalmCalmCalmCalmNW5

Tide / Current Tables for Gold Street Bridge, Alviso Slough, San Francisco Bay, California
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Gold Street Bridge
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Wed -- 01:14 AM PDT     9.45 feet High Tide
Wed -- 07:11 AM PDT     Sunrise
Wed -- 07:17 AM PDT     Moonset
Wed -- 07:56 AM PDT     1.10 feet Low Tide
Wed -- 12:55 PM PDT     10.49 feet High Tide
Wed -- 06:43 PM PDT     Full Moon
Wed -- 07:12 PM PDT     Moonrise
Wed -- 07:19 PM PDT     Sunset
Wed -- 08:23 PM PDT     -0.50 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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8.19.49.28.16.44.42.61.51.12.14.57.39.610.5108.66.54.220.4-0.4-0.21.64.2

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
Click for Map
Wed -- 01:18 AM PDT     -0.01 knots Slack
Wed -- 05:23 AM PDT     -1.22 knots Max Ebb
Wed -- 07:12 AM PDT     Sunrise
Wed -- 07:17 AM PDT     Moonset
Wed -- 07:33 AM PDT     0.00 knots Slack
Wed -- 10:12 AM PDT     1.65 knots Max Flood
Wed -- 01:14 PM PDT     -0.00 knots Slack
Wed -- 05:41 PM PDT     -1.57 knots Max Ebb
Wed -- 06:43 PM PDT     Full Moon
Wed -- 07:12 PM PDT     Moonrise
Wed -- 07:20 PM PDT     Sunset
Wed -- 08:08 PM PDT     0.01 knots Slack
Wed -- 10:47 PM PDT     1.78 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.10.3-0.3-0.8-1.1-1.2-1.1-0.50.41.21.61.510.2-0.4-0.9-1.3-1.5-1.5-1-0.10.91.61.8

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 (17,4,5,8)
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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.