Thursday, October18, 2018 L-36.com


Marine Weather and Tides
Montalvin Manor, 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 7:20AMSunset 6:27PM Thursday October 18, 2018 11:20 AM PDT (18:20 UTC) Moonrise 2:43PMMoonset 12:22AM Illumination 68% Phase: Waxing Gibbous; Moon at 9 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- 912 Am Pdt Thu Oct 18 2018
Today..W winds up to 10 kt.
Tonight..SW winds 5 to 10 kt.
Fri..W winds up to 10 kt.
Fri night..SW winds 5 to 15 kt.
Sat..NE winds up to 10 kt.
Sat night..SW winds up to 10 kt.
Sun..W winds up to 10 kt.
Mon..W winds 5 to 15 kt.
PZZ500 912 Am Pdt Thu Oct 18 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Light northerly winds through the end of the week except for locally breezy conditions in the afternoon and evenings. A long period northwest swell will continue to bring an increased risk of rip currents and sneaker waves.


7 Day Forecast for Marine Location Near Montalvin Manor, CA
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location: 38.06, -122.39     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 181808
afdmtr
area forecast discussion
national weather service san francisco bay area
1108 am pdt Thu oct 18 2018

Synopsis Seasonably warm conditions will persist through Friday
with a slight warming trend into the weekend. The forecast remains
dry through the weekend as well. Cooler conditions return early
next week with a slight chance of light rain over the north bay by
midweek.

Discussion As of 9:14 am pdt Thursday... The ongoing forecast
remains on track this morning with a marine layer of around 1,000
feet in depth. This allowed for widespread stratus to develop
along the coast and into the adjacent valleys this morning. At
this hour, stratus is mixing out across the salinas valley and
along the big sur coast while low clouds are holding strong in the
north bay (mainly sonoma and marin counties) around san francisco
bay area and as far south as the santa clara valley. Do expect
low clouds inland to dissipate through the morning and give way to
mainly sunny conditions region-wide this afternoon. Thus, no
major updates are needed to the forecast at this time. For more
details, please see the previous forecast discussion below.

Prev discussion As of 03:04 am pdt Thursday... The trend
started a few days ago continues tonight: decreased offshore flow,
deeper marine layer, increased cloud cover and increased relative
humidity. Overnight GOES east satellite fog product indicates
widespread clouds over the coastal waters and the north bay and
salinas valleys. Fort ord profiler puts the marine layer depth
around 1,200 feet. The 24 hour change product also shows many
locations warmer and wetter due to the increased onshore flow and
cloud cover. Lastly, the upper low that was parked over socal a
few days ago continues to move NE as high pressure builds over the
pacnw.

Short term weather impacts will be mainly focused on patchy dense
fog along the immediate coast and the 101 corridor in sonoma
county. Santa rosa airport is currently showing a visibility of
1 2 mile. Similar to yesterday, morning clouds will roll back to
the coast by mid morning. Once the clouds clear do expect sunny
skies this afternoon with warmer temperatures than Wednesday.

Temperatures today will be in the 60s 70s at the coast and 70s 80s
inland. A few spots in the interior may even approach 90 degrees.

It's not unusual to have mild weather in october for the bay
area. Today's forecast is roughly 5 to 10 degrees above normal.

Rounding out the work week and heading into the weekend - not
expecting much change in the overall sensible weather. A gradual
warming trending will continue through Saturday as high pressure
builds over the region with increasing h5, warming 850mb temps and
lingering offshore winds aloft. One area that will be problematic
at times will be the extent of the night morning low clouds. Given
the rising h5 one would expect a compression of the marine layer.

Therefore, some night morning clouds will remain, but coverage
will be much less than this morning.

High pressure begins to shift eastward by Sunday triggering the
onset of a cooling trend heading into next week. Medium range
forecasts for next week continue to be dicey as models differ on
precip chances. The first chance for possible precip would
possibly occur next Tuesday Wednesday as a low moves into british
columbia and upper trough enters the pacnw. Impacts to the bay
area continue to be focused mainly over the north bay. However,
latest trends have been drier and farther north (north of bay
area). The second chance for precip will be later in the week as
another low moves into the pacnw. For what it's worth, the latest
gfs ensemble probability tool shows less than a 15% chance of
0.01" of rain falling at ksfo all of next week. Therefore,
confidence remains low for precip next week and latest forecast
will generally keep a slight chance mainly over the north bay.

Even if next week ends up being dry these passing system will at
least bring cooler temperatures to the region.

Aviation As of 11:08 am pdt Thursday... For 18z tafs. Stratus
is eroding quickly this morning with most terminals quickly
trendingVFR before 19z. Still a well defined 1200 foot marine
layer along the coast that should allow low CIGS to return this
evening along the coast and then spread into the bay by sunrise
Friday.

Vicinity of ksfo... Terminal should scatter out by 19z with more
clearing throuhg the early afternoon. CIGS shouldnt return until
after 08z.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR this afternoon with CIGS returning
around 03z this evening and lasting through 17z Friday.

Marine As of 10:42 am pdt Thursday... Light northerly winds
through the end of the week except for locally breezy conditions
in the afternoon and evenings. A long period northwest swell will
continue to bring an increased risk of rip currents and sneaker
waves.

Mtr watches warnings advisories
Tday None.

Public forecast: rgass
aviation: rww
marine: rww
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 7 mi32 min NW 5.1 G 7 56°F 1021.2 hPa
RCMC1 - 9414863 - Richmond, CA 10 mi32 min 63°F
PPXC1 - 9414847 - Richmond (Point Potrero), CA 11 mi32 min SW 1.9 G 4.1 58°F 1021.7 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 12 mi39 min ENE 2.9 56°F 1022 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 14 mi32 min WNW 8 G 8.9 58°F 64°F1021.2 hPa56°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 17 mi32 min SW 5.1 G 6 57°F 1021.4 hPa
PXSC1 18 mi32 min 58°F 54°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 18 mi32 min E 5.1 G 7 56°F 1020.3 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 18 mi32 min SSW 6 G 6
FTPC1 - 9414290 - San Francisco, CA 18 mi38 min N 5.1 G 6 55°F 61°F1021.7 hPa
OBXC1 18 mi32 min 57°F 54°F
LNDC1 19 mi32 min W 2.9 G 4.1 58°F 1021.3 hPa
PCOC1 - 9415144 - Port Chicago, CA 19 mi32 min W 8 G 8.9 58°F 63°F1021.1 hPa
AAMC1 - 9414750 - Alameda, CA 20 mi38 min Calm G 4.1 58°F 64°F1021.6 hPa
SFXC1 - San Francisco Bay Reserve, CA 22 mi95 min WNW 1.9 59°F 1021 hPa
46237 - San Francisco Bar, CA (142) 23 mi50 min 60°F5 ft
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 27 mi32 min NNW 2.9 G 4.1 62°F 1020.8 hPa
PRYC1 - 9415020 - Point Reyes, CA 31 mi32 min NW 5.1 G 7 59°F1021.4 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 32 mi30 min NW 5.8 G 9.7 55°F 58°F6 ft1022.1 hPa
RTYC1 - 9414523 - Redwood City, CA 39 mi32 min SE 1 G 1.9 58°F 67°F1021.9 hPa

Wind History for Richmond, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Novato / Gnoss Field, CA11 mi25 minESE 49.00 miA Few Clouds57°F51°F82%1021.3 hPa
Napa, Napa County Airport, CA12 mi26 minSSW 37.00 miMostly Cloudy54°F50°F87%1020.6 hPa
Petaluma Municipal Airport, CA18 mi45 minN 06.00 miPartly Cloudy with Haze57°F53°F88%1021.7 hPa
Concord, Buchanan Field, CA19 mi27 minno data8.00 miFair63°F48°F60%1019.7 hPa

Wind History from DVO (wind in knots)
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Last 24hrCalmCalm5Calm3NW9N13N12N8N5CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm
1 day agoCalmCalmSE443NW94N8N6N5N4CalmCalmCalmCalmCalmCalmCalmNW4NW5W4W3CalmCalm
2 days agoSE7S8SE554S5SW5
G11
N84CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmN3CalmCalmCalmCalm

Tide / Current Tables for Pinole Point, San Pablo Bay, California
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Pinole Point
Click for Map
Thu -- 01:22 AM PDT     Moonset
Thu -- 03:00 AM PDT     0.68 feet Low Tide
Thu -- 07:21 AM PDT     Sunrise
Thu -- 10:14 AM PDT     5.00 feet High Tide
Thu -- 03:42 PM PDT     Moonrise
Thu -- 03:50 PM PDT     2.43 feet Low Tide
Thu -- 06:27 PM PDT     Sunset
Thu -- 09:02 PM PDT     4.91 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.31.50.90.70.91.52.33.244.754.94.43.732.62.42.73.34.14.74.94.74.1

Tide / Current Tables for Petaluma River Approach, San Pablo Bay, California Current
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Petaluma River Approach
Click for Map
Thu -- 12:13 AM PDT     -0.72 knots Max Ebb
Thu -- 01:22 AM PDT     Moonset
Thu -- 03:54 AM PDT     0.00 knots Slack
Thu -- 07:10 AM PDT     0.66 knots Max Flood
Thu -- 07:21 AM PDT     Sunrise
Thu -- 10:32 AM PDT     -0.00 knots Slack
Thu -- 01:11 PM PDT     -0.52 knots Max Ebb
Thu -- 03:42 PM PDT     Moonrise
Thu -- 03:53 PM PDT     0.00 knots Slack
Thu -- 06:16 PM PDT     0.44 knots Max Flood
Thu -- 06:27 PM PDT     Sunset
Thu -- 09:23 PM PDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.7-0.7-0.6-0.300.30.60.70.60.40.1-0.2-0.4-0.5-0.5-0.300.30.40.40.30.1-0.2-0.5

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 (14,3,4,5)
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Ground Weather Radar Station Sacramento, 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.