Wednesday, March20, 2019 L-36.com


Marine Weather and Tides
Livermore, 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 3:05 PM PDT (22:05 UTC) Moonrise 6:11PMMoonset 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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PZZ530 San Pablo Bay, Suisun Bay, The West Delta And The San Francisco Bay North Of The Bay Bridge- 244 Pm Pdt Wed Mar 20 2019
This afternoon..SW winds 10 to 15 kt. Showers likely and a slight chance of Thunderstorms.
Tonight..NW winds up to 10 kt. A slight chance of showers.
Thu..W winds 5 to 15 kt.
Thu night..W winds up to 10 kt.
Fri..SE winds 5 to 15 kt with gusts up to 25 kt. Rain.
Fri night..SW winds 5 to 15 kt with gusts up to 25 kt. Rain.
Sat..W winds 5 to 15 kt with gusts up to 25 kt.
Sun..S winds up to 10 kt. A chance of rain. Winds and wind waves higher in and near Thunderstorms.
PZZ500 244 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... Light to moderate west to southwest winds will continue this evening across the coastal waters before winds diminish overnight. Winds will increase and turn southerly again tomorrow night and Friday as the next weather system approaches. Moderate period west swell will continue today and tomorrow before a longer period west to northwest swell arrives on Friday.


7 Day Forecast for Marine Location Near Livermore, CA
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location: 37.6, -121.66     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 202135
afdmtr
area forecast discussion
national weather service san francisco bay area
235 pm pdt Wed mar 20 2019

Synopsis Rain showers will diminish in strength and coverage
through the remainder of the day. 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. Cool, unsettled weather possible throughout
most of next week.

Discussion As of 02:30 pm pdt Wednesday... A slow moving,
negatively tilted trough approached california from the west last
evening and brought gusty southerly winds before pushing ashore
after midnight. Light to moderate broken rain bands were wrapped
tightly around the core of the upper low as it shifted ashore,
delaying the onset of rain for some in the north bay until the
upper disturbance lifted northward this morning. The majority of
the rain and wind from this storm system has now passed, however,
a second disturbance rounding the broader trough later today
through tonight will allow gradually weakening rain showers to
persist through the next 12 to 18 hours. Latest radar satellite
imagery shows the deepest convection has now shifted farther
inland over the central valley, where lightning pulses have been
observed near los banos, tracy, and stockton.

Scattered to widespread showers through the day added to the
overnight rain totals with the big sur peaks leading the storm
total rainfall accumulations (generally around 1.50-2.00"). Other
higher elevation locations in the north bay (such as venado) and
the santa cruz mountains (such as ben lomond) picked up between
1.00 and 1.50". Elsewhere, lower elevation urban areas reported
lesser amounts between 0.10" on the low end (in rain shadowed
areas) and up to 1.00" on the high end (typically along the coast
or near orographically enhanced areas). Peak gusts ranged from 40
to 50mph out of the south in the windiest locations and occurred
last evening ahead of the cold front. Winds this afternoon have
weakened but remain breezy and primarily out of the west on the
lee of the trough.

Despite the relatively warm start to the day, afternoon
temperatures are 5 to 15 degrees cooler than the same time
yesterday with 2pm temperatures in the mid 50s to low 60s. These
afternoon high temperatures are 4 to 8 degrees below normal
readings for this time of the year. And speaking of this time of
the year... Spring officially begins at 258pm this afternoon!
happy vernal equinox!
a transitory ridge arrives tomorrow which will bring dry weather
conditions and a slight warming trend for the day. Despite this
warming trend, afternoon temps are forecast remain a few degrees
below normal tomorrow.

Another storm system arrives 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 (around 1.00" over the north bay coastal range,
ie venado, and 1 2-2 3" in the north bay valleys) with progressively
lower accumulations 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.

High pressure redevelops throughout most of the weekend which will
bring generally dry weather conditions and a moderate warming
trend regionwide. Sunday afternoon temperatures rebound to nearly
normal with highs ranging from the low to upper 60s.

A third storm system will impact the region early next week. Mid
to long term models and ensemble members are peppering the Monday
through Thursday 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 Thursday. As it now stands, the data shows a clear
trend towards an extended period of cool, unsettled weather
throughout most of next week.

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
Tngt Sca... Pt arena to pt reyes 0-10 nm until 6 pm
sca... Pt reyes to pigeon pt 0-10 nm until 6 pm
sca... Pigeon pt to pt pinos 0-10 nm until 6 pm
sca... Pt pinos to pt piedras blancas 0-10 nm until 6 pm
sca... Pt arena to pigeon pt 10-60 nm until 9 pm
sca... Pigeon pt to pt piedras blancas 10-60 nm until 9 pm
sca... Rough bar advisory for sf bar until 9 pm
sca... Sf bay until 3 pm
public forecast: drp
aviation: as
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 30 mi47 min SW 9.9 G 14 59°F 61°F1017.4 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 33 mi47 min WNW 11 G 16 59°F 1016.3 hPa
AAMC1 - 9414750 - Alameda, CA 36 mi53 min WSW 8 G 8.9 57°F 57°F1017.6 hPa
LNDC1 36 mi47 min W 6 G 12 57°F 1017.1 hPa
PCOC1 - 9415144 - Port Chicago, CA 37 mi47 min WSW 14 G 17 58°F 56°F1016.7 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 38 mi47 min WSW 9.9 G 13
UPBC1 39 mi47 min W 17 G 20
OKXC1 - 9414776 - Oakland (Berth 34), CA 39 mi47 min WSW 6 G 9.9 58°F 1017.1 hPa
OBXC1 39 mi47 min 57°F 43°F
MZXC1 - 9415102 - Martinez-Amorco CA 39 mi47 min WSW 14 G 19 56°F1016.8 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 41 mi47 min WSW 4.1 G 12 58°F 1016.1 hPa
PXSC1 42 mi53 min 58°F 44°F
PPXC1 - 9414847 - Richmond (Point Potrero), CA 43 mi47 min SW 11 G 14 57°F 1017.3 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 45 mi47 min WSW 9.9 G 13 57°F 1016.5 hPa
FTPC1 - 9414290 - San Francisco, CA 45 mi53 min W 8 G 14 56°F 56°F1017.4 hPa
RCMC1 - 9414863 - Richmond, CA 46 mi53 min SW 6 G 11 57°F 56°F1016.9 hPa
SFXC1 - San Francisco Bay Reserve, CA 46 mi80 min W 12 61°F 1017 hPa47°F
TIBC1 - Tiburon Pier, San Francisco Bay, CA 46 mi54 min SW 2.9 56°F 1017 hPa

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Livermore, Livermore Municipal Airport, CA11 mi12 minW 1210.00 miLight Rain60°F46°F62%1015.9 hPa
San Jose / Reid / Hillv, CA20 mi4.3 hrsSE 106.00 miFog/Mist59°F50°F72%1016.3 hPa
San Jose, San Jose International Airport, CA21 mi12 minWSW 910.00 miMostly Cloudy63°F42°F47%1016.1 hPa
Mountain View, Moffett Field, CA24 mi9 minW 610.00 miA Few Clouds62°F42°F48%1016.7 hPa

Wind History from LVK (wind in knots)
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Last 24hrNE7NE6NE5W14
G20
W11SW9SW75N4CalmCalmCalmNE4CalmCalmE7CalmS6S6S8S9SW8W15W12
1 day agoNE8NE7NE4NE4CalmCalmCalmCalmE3W3CalmCalmCalmNE3CalmCalmCalmE3CalmCalmSW33NE9NE8
2 days agoE10E11NE9NE8E7CalmNE4CalmCalmCalmE4CalmCalmE3CalmCalmCalmCalmSW3SW4NE7NE10E9NE9

Tide / Current Tables for Coyote Creek, Tributary no.1, 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 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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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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Wind Forecast for San Francisco/Monterey Bay Area, CA (18,4,5,8)
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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.