Wednesday, February21, 2018 L-36.com


Marine Weather and Tides
Black Point-Green Point, CA

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 6:49AMSunset 5:57PM Wednesday February 21, 2018 4:50 PM PST (00:50 UTC) Moonrise 10:18AMMoonset 12:00AM Illumination 42% Phase: First Quarter Moon; Moon at 7 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- 207 Pm Pst Wed Feb 21 2018
.small craft advisory in effect from late tonight through Thursday evening...
Rest of today..NW winds 5 to 15 kt.
Tonight..W winds 5 to 15 kt.
Thu..NW winds 15 to 25 kt with gusts up to 35 kt. A chance of showers and a slight chance of Thunderstorms.
Thu night..NW winds 10 to 20 kt with gusts up to 30 kt. A slight chance of showers and Thunderstorms in the evening.
Fri..N winds 5 to 15 kt with gusts up to 25 kt.
Fri night..W winds 5 to 15 kt with gusts up to 25 kt.
Sat..W winds 10 to 20 kt with gusts up to 30 kt.
Sun..NW winds up to 10 kt...becoming sw.
PZZ500 207 Pm Pst Wed Feb 21 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Light variable winds will transition to increasing northerly winds through the remainder of the day. Northerly winds will continue to strengthen overnight and through tomorrow, bringing very gusty winds and steep fresh swell. Gale force gusts are possible in the outer waters tomorrow afternoon through late tomorrow night.

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 212332
afdmtr
area forecast discussion
national weather service san francisco bay area
332 pm pst Wed feb 21 2018

Synopsis A weak weather system will impact the region tomorrow
bringing showers, a slight chance of scattered thunderstorms in
the afternoon, and lowering snow levels. This system will also bring
gusty winds tomorrow and colder temperatures Friday morning. Dry
weather and slightly warmer daytime conditions are likely for the
weekend with cooler, unsettled weather potentially returning
early next week.

Discussion As of 01:58 pm pst Wednesday... Shower activity has
moved out for the day with partly cloudy skies expected the rest
of the afternoon and evening. Unseasonably cool temperatures
continue this afternoon with forecast highs in the 50s and 40s for
higher peaks.

The main forecast concern continues to be a weak short-wave
trough that will move through the area tomorrow. This system is
expected to bring scattered rain and snow showers, scattered
afternoon thunderstorms, and widespread gusty winds to the region.

Shower activity tomorrow will be scattered with little
accumulations expected. Along with this system will come another
burst of cold air allowing for lowered snow levels to around 2000
ft and light snow accumulations possible in the higher peaks.

Sufficient instability will allow for the development of
scattered thunderstorms over parts of the north and east bay
starting in the afternoon as forecast models show a few hundred
j kg of CAPE over the area. Some storms may carry small hail, and
a few high elevation areas may even see a little thundersnow.

Winds will begin to pick up early tomorrow morning and increase
throughout the day. Strongest winds are expected along the coast
and in the hills with gusts over 40 mph possible. Once the winds
subside and skies begin to clear tomorrow night, temperatures will
drop into the 30s for most areas with some valley locations in
the 20s.

Once this system moves out, dry conditions are expected Friday and
through the weekend as the persistent deep trough overhead begins
to slightly weaken and shift inland. This will allow for afternoon
highs to warm slightly over the weekend, although cool overnight
and morning lows will continue.

Looking into next week, models continue to suggest that we will
remain in a broad troughing pattern with weaker embedded systems
developing and moving through the area. Meaning cool and
unsettled weather will likely persist into early next week.

Aviation As of 3:30 pm pst Wednesday... Skies have cleared up
this afternoon following the passage of a dry shortwave.VFR
conditions are expected this evening before another upper level
shortwave approaches the area late tonight. Models indicate lower
level moisture after 09z but only lasting a few hours as strong
northerly winds help to clear out the clouds after 13-14z.

Vicinity of ksfo...VFR except for a period of lower clouds between
10z-13z possibly lowering into MVFR range. Offshore winds up to
10 kt switching to onshore before dark. Much stronger northwest
winds are anticipated Thursday morning after 13-14z with
potential for an airport weather warning Thursday afternoon.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR.

Climate
Here are record low temperatures and the years they occurred for
Wednesday.

Location Wednesday
sf bay area
healdsburg 28 in 1929
santa rosa 26 in 1913
calistoga 25 in 2006
kentfield 29 in 1953
san rafael 33 in 1955
napa 29 in 1955
san francisco 36 in 1890
sfo airport 34 in 1955
half moon bay 31 in 2006
oakland airport 33 in 1955
richmond 35 in 1981
livermore 27 in 1955
moffett field 32 in 1955
san jose 25 in 1897
gilroy 31 in 1976
monterey bay area
santa cruz 30 in 1955
salinas 31 in 1970
salinas airport 30 in 1953
monterey 36 in 1952
king city 23 in 1953

Marine As of 03:21 pm pst Wednesday... Light variable winds will
transition to increasing northerly winds through the remainder of
the day. Northerly winds will continue to strengthen overnight and
through tomorrow, bringing very gusty winds and steep fresh swell.

Gale force gusts are possible in the outer waters tomorrow
afternoon through late tomorrow night.

Mtr watches warnings advisories
Tngt Sca... Mry bay from 3 am
sca... Pt reyes to pigeon pt 0-10 nm from 3 am
sca... Pigeon pt to pt pinos 0-10 nm from 3 am
sca... Pt pinos to pt piedras blancas 0-10 nm from 3 am
sca... Pt arena to pigeon pt 10-60 nm
sca... Pigeon pt to pt piedras blancas 10-60 nm from 9 pm
sca... Pt arena to pt reyes 0-10 nm from 9 pm
sca... Sf bay from 3 am
public forecast: as
aviation: W pi
marine: drp
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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 mi51 min W 6 G 8 53°F 1021.3 hPa
RCMC1 - 9414863 - Richmond, CA 14 mi51 min NW 2.9 G 5.1 53°F 54°F1021.3 hPa (-0.8)
TIBC1 - Tiburon Pier, San Francisco Bay, CA 15 mi47 min WSW 1.9 55°F 1022 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 16 mi51 min W 5.1 G 8.9 55°F 1021.8 hPa
FTPC1 - 9414290 - San Francisco, CA 21 mi51 min W 7 G 9.9 51°F 53°F1022.2 hPa (-0.7)
MZXC1 - 9415102 - Martinez-Amorco CA 21 mi51 min WNW 2.9 G 4.1 53°F 53°F1021.5 hPa (-1.3)25°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 22 mi51 min WNW 8 G 8.9 53°F 1021.7 hPa (-0.7)
PXSC1 22 mi51 min 53°F 29°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 22 mi51 min WNW 5.1 G 8.9 52°F 1021 hPa (-0.6)
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 23 mi51 min W 8.9 G 9.9
46237 - San Francisco Bar, CA (142) 23 mi51 min 53°F4 ft
OBXC1 23 mi51 min 53°F 28°F
LNDC1 25 mi51 min NW 7 G 9.9 54°F 1021.6 hPa (-0.7)
PCOC1 - 9415144 - Port Chicago, CA 25 mi51 min N 1.9 G 2.9 53°F 53°F1021.3 hPa (-1.2)
SFXC1 - San Francisco Bay Reserve, CA 26 mi66 min WSW 2.9 56°F 1022 hPa23°F
PRYC1 - 9415020 - Point Reyes, CA 26 mi51 min W 8 G 9.9 51°F1021.9 hPa (-0.6)
AAMC1 - 9414750 - Alameda, CA 26 mi51 min W 7 G 9.9 53°F 54°F1021.7 hPa (-0.7)
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 30 mi61 min WNW 7.8 G 7.8 49°F 52°F4 ft1022.5 hPa (-0.4)
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 33 mi51 min NNW 2.9 G 2.9 54°F 1021.4 hPa
RTYC1 - 9414523 - Redwood City, CA 44 mi51 min WNW 6 G 8.9 54°F 53°F1022.1 hPa (-0.5)
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 44 mi41 min WNW 9.7 G 12 50°F 1022.6 hPa40°F

Wind History for Richmond, CA
(wind in knots)    EDIT      (on/off)   Help
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W7
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N3
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N6
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NW18
G23
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N7
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S1
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G19

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Novato / Gnoss Field, CA4 mi76 minWNW 5 G 1010.00 miFair57°F28°F33%1022 hPa
Petaluma Municipal Airport, CA12 mi56 minW 1210.00 miFair54°F35°F51%1021.7 hPa
Napa, Napa County Airport, CA14 mi57 minSSW 810.00 miFair54°F26°F34%1020.7 hPa

Wind History from DVO (wind in knots)
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Last 24hr5E4CalmE5CalmCalmCalmCalmCalmCalmCalmCalmNE4CalmCalmCalmSE5E5SE5SE5CalmCalmW3W5
1 day agoW12
G19
W12
G18
NW11NW13NW12
G18
NW13NW11
G17
NW12NW14CalmCalmCalmW4NW94CalmN84CalmS7NE7
G14
SW9W6NW10
2 days agoW13
G19
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G23
--W11
G16
NW4W7
G12
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G19
W14
G21
W10
G16
W14W9W7W10N7NW12NW12
G18
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NW10W8NW9
G18
W7
G15
NW11
G21
NW13
G20

Tide / Current Tables for Petaluma River entrance, San Pablo Bay, California
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Petaluma River entrance
Click for Map
Wed -- 04:29 AM PST     5.92 feet High Tide
Wed -- 06:52 AM PST     Sunrise
Wed -- 10:18 AM PST     Moonrise
Wed -- 11:26 AM PST     1.07 feet Low Tide
Wed -- 05:09 PM PST     4.44 feet High Tide
Wed -- 05:55 PM PST     Sunset
Wed -- 11:15 PM PST     1.58 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.934.25.25.85.95.44.53.42.31.51.11.21.72.63.44.14.44.33.93.22.51.91.6

Tide / Current Tables for Petaluma River Approach, San Pablo Bay, California Current
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Petaluma River Approach
Click for Map
Wed -- 01:03 AM PST     0.78 knots Max Flood
Wed -- 04:42 AM PST     -0.00 knots Slack
Wed -- 06:52 AM PST     Sunrise
Wed -- 07:34 AM PST     -0.74 knots Max Ebb
Wed -- 10:18 AM PST     Moonrise
Wed -- 11:43 AM PST     0.00 knots Slack
Wed -- 01:55 PM PST     0.44 knots Max Flood
Wed -- 05:26 PM PST     -0.00 knots Slack
Wed -- 05:54 PM PST     Sunset
Wed -- 08:06 PM PST     -0.55 knots Max Ebb
Wed -- 11:14 PM PST     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.60.80.70.50.2-0.1-0.5-0.7-0.7-0.6-0.4-0.20.10.40.40.40.30.1-0.2-0.4-0.5-0.5-0.3-0.1

Weather Map and Satellite Images
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Weather Map
wmap_P
IR Satellite Image from GEOS
west_satellite

GOES Local Image of CentralWestCoast    EDIT
Geos

Wind Forecast for San Francisco/Monterey Bay Area, CA (19,4,5,8)
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Ground Weather Radar Station Sacramento, CA
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weather_mapweather_map weather_map

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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.