Wednesday, September19, 2018 L-36.com


Marine Weather and Tides
Black Point-Green Point, CA

Version 3.4
What's New / NOTES
9/17/2018 XTide broke when 1and1 "upgraded" my server. It has been esculated. I am sorry for the problem.

Sunrise 6:55AMSunset 7:12PM Wednesday September 19, 2018 2:24 PM PDT (21:24 UTC) Moonrise 3:29PMMoonset 12:45AM Illumination 74% Phase: Waxing Gibbous; Moon at 10 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- 215 Pm Pdt Wed Sep 19 2018
Tonight..W winds 5 to 15 kt.
Thu..SW winds 5 to 15 kt.
Thu night..SW winds 5 to 15 kt.
Fri..SW winds 10 to 20 kt.
Fri night..SW winds 10 to 20 kt.
Sat..SW winds 10 to 20 kt.
Sun..W winds 5 to 15 kt.
Mon..W winds 5 to 15 kt.
PZZ500 215 Pm Pdt Wed Sep 19 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... High pressure to the north and low pressure to the south will keep breezy to gusty northerly winds along the central coast through Thursday evening. Gusty winds will generate steep wind waves creating hazardous sea conditions, especially for smaller vessels. Winds will then diminish late this week as the high pressure weakens and the thermal trough shifts towards the coast.


7 Day Forecast for Marine Location Near Black Point-Green Point, CA
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location: 38.11, -122.5     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 192046
afdmtr
area forecast discussion
national weather service san francisco bay area
146 pm pdt Wed sep 19 2018

Synopsis A warming and drying trend will continue into
Thursday as onshore flow weakens and a brief period of offshore
flow begins. Gusty northerly winds in higher elevations will
result in enhanced fire weather concerns from tonight into
Thursday morning, mainly in the north and east bay mountains and
the santa cruz mountains. Temperatures are expected to moderate
slightly over the upcoming weekend but will remain near to
slightly above seasonal averages as we head into next week.

Discussion As of 1:46 pm pdt Wednesday... The marine layer has
lowered to around 1000 feet per the fort ord profiler output, as
high pressure aloft begins to nudge into the state. Skies have
cleared except for a stubborn patch of low clouds clinging to the
monterey peninsula. Most temperatures are running warmer than
yesterday by several degrees, santa rosa is 10 degrees warmer at
79 degrees! Coastal areas are about the same as yesterday with
upper 50s to mid 60s currently. The northerly surface pressure
gradient continues to tighten with acv-sfo now nearing 6 mb. The
onshore component remains fairly weak with 1 mb from sfo to sac.

The northerly gradient will result in increasing offshore winds
over the higher hills from santa cruz county northward. See below
for how this will affect fire weather.

High pressure aloft will edge into california from the west. This
will usher in a warming trend over the next few days, peaking on
Thursday when high temperatures are forecast to warm into the 90s
across the warmest inland areas, with 60s and 70s along the
coast. Slight cooling is expected over the weekend as an upper
level trough moves across the pacific northwest.

Medium range model runs still indicating a return of high
pressure over the eastern pacific early next week. This will
maintain high temperatures in the around normal or slightly above
normal range.

Aviation As of 10:35 am pdt Wednesday... For 18z tafs.

TrendingVFR at all terminals as low clouds continue to erode.

ExpectVFR this afternoon tonight. Offshore flow is forecast to
develop overnight leading to dry of the low levels. This should
keep the sf bay are clear. Monterey bay area on the other hand
could have some low clouds early in the night before clearing
early tomorrow morning. Decided to include llws for koak for
tomorrow morning. Light and vrb at the surface with gusty NE winds
over the east bay hills.

Vicinity of ksfo...VFR. Gusty onshore this afternoon.VFR tonight
with gusty offshore flow.

Sfo bridge approach... .Similar to sfo.

Monterey bay terminals... .Vfr this afternoon. Some CIGS poss early
tonight then clearing early tomorrow.

Marine As of 8:34 am pdt Wednesday... Moderate to locally
strong northerly winds will prevail over the coastal waters today
as high pressure remains over the eastern pacific. Gusty winds
will generate steep wind waves creating hazardous sea conditions,
especially for smaller vessels. Winds will then diminish late this
week as the high pressure weakens and the thermal trough shifts
towards the coast.

Fire weather A tightening northerly surface pressure gradient
will produce gusty winds across the north bay mountains, the east
bay hills and diablo range, and the santa cruz mountains. This
coupled with very poor relative humidity recoveries overnight and
already dry fuels will elevate fire weather concerns in these
areas. A red flag warning has been issued for these areas
beginning tonight at 11 pm and going through 5 pm on Thursday.

Winds will begin diminishing during the day, but continued breezy
conditions and low daytime relative humidity values justify
keeping the rfw through the day. Weaker offshore winds are
expected on Friday, and the flow will return to onshore over the
weekend.

Mtr watches warnings advisories
Tngt Sca... Pt reyes to pigeon pt 0-10 nm until 3 am
sca... Pigeon pt to pt pinos 0-10 nm until 3 am
sca... Pt arena to pigeon pt 10-60 nm
sca... Pigeon pt to pt piedras blancas 10-60 nm
sca... Pt pinos to pt piedras blancas 0-10 nm
sca... Pt arena to pt reyes 0-10 nm
sca... Mry bay until 9 pm
public forecast: sims
aviation: mm
marine: mm
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 13 mi37 min WSW 5.1 G 5.1 66°F 1011.7 hPa
RCMC1 - 9414863 - Richmond, CA 14 mi37 min 64°F
TIBC1 - Tiburon Pier, San Francisco Bay, CA 15 mi44 min SE 1.9 68°F 1012 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 16 mi37 min SSW 6 G 8 65°F 1012.5 hPa
FTPC1 - 9414290 - San Francisco, CA 21 mi43 min WSW 8 G 16 59°F 61°F1012.7 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 21 mi37 min 66°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 22 mi43 min WNW 8.9 G 11 62°F 1012.1 hPa
PXSC1 22 mi43 min 69°F 53°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 22 mi43 min W 8 G 11 70°F 1011.2 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 23 mi43 min NW 5.1 G 5.1
46237 - San Francisco Bar, CA (142) 23 mi55 min 58°F4 ft
OBXC1 23 mi43 min 64°F 57°F
LNDC1 25 mi43 min NW 5.1 G 8.9 68°F 1012.1 hPa
PCOC1 - 9415144 - Port Chicago, CA 25 mi43 min W 2.9 G 4.1 74°F 66°F1011.5 hPa
SFXC1 - San Francisco Bay Reserve, CA 26 mi100 min W 2.9 78°F 1012 hPa51°F
PRYC1 - 9415020 - Point Reyes, CA 26 mi37 min WNW 18 G 23 54°F1012.9 hPa
AAMC1 - 9414750 - Alameda, CA 26 mi43 min NW 2.9 G 5.1 71°F 66°F1012.3 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 30 mi25 min NW 16 G 18 54°F 54°F1013.4 hPa (-0.9)
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 33 mi37 min WNW 6 G 7 73°F 1011.1 hPa
RTYC1 - 9414523 - Redwood City, CA 44 mi37 min 68°F
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 44 mi25 min NW 14 G 18 51°F1013.3 hPa (-0.8)

Wind History for Richmond, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Novato / Gnoss Field, CA4 mi30 minVar 48.00 miFair82°F50°F32%1011.2 hPa
Petaluma Municipal Airport, CA12 mi30 minVar 410.00 miFair82°F50°F32%1011.5 hPa
Napa, Napa County Airport, CA14 mi31 minSSW 610.00 miFair76°F51°F42%1010.7 hPa

Wind History from DVO (wind in knots)
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Last 24hrE65SW7
G14
SW11S5
G11
4CalmCalmCalmCalm--CalmN3CalmCalmCalmCalmCalmCalmCalmCalmN644
1 day agoSW16SW14
G20
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SW12SW12S7
G16
E6E7CalmCalmCalmCalmCalmCalmCalmS3CalmCalmCalmCalmNW444Calm
2 days agoW9
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G19
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G19
56E5E4CalmCalmCalmCalmCalmCalmCalmCalmCalmNW4CalmNE6CalmCalm6E8

Tide / Current Tables for Petaluma River entrance, San Pablo 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 Petaluma River Approach, San Pablo Bay, California Current
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Tide / Current data from XTide NOT FOR NAVIGATION
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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 (17,4,5,8)
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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.