Tuesday, December18, 2018 L-36.com


Marine Weather and Tides
Black Point-Green Point, 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 4:54PM Tuesday December 18, 2018 8:13 PM PST (04:13 UTC) Moonrise 2:17PMMoonset 2:44AM Illumination 88% Phase: Waxing Gibbous; Moon at 11 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
    EDIT      (on/off)   Help
PZZ530 San Pablo Bay, Suisun Bay, The West Delta And The San Francisco Bay North Of The Bay Bridge- 235 Pm Pst Tue Dec 18 2018
Tonight..SE winds up to 10 kt.
Wed..NE winds up to 10 kt.
Wed night..NE winds 5 to 10 kt.
Thu..NE winds 5 to 15 kt.
Thu night..S winds 5 to 15 kt. A slight chance of rain.
Fri..N winds 5 to 10 kt.
Fri night..NW winds up to 10 kt.
Sat..NW winds around 5 kt.
Sun..W winds around 5 kt. A chance of rain.
PZZ500 235 Pm Pst Tue Dec 18 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Locally gusty northwest winds will continue along the big sur coast through this evening. A weak frontal boundary stalled over the region will result in light and variable winds across the northern waters and light northerly winds over the southern waters through Wednesday. Another large long-period swell will build Wednesday before subsiding Thursday. Hazardous sea conditions will also continue through Thursday.


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


Area Discussion for - San Francisco/Monterey Bay Area, CA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus66 kmtr 190004
afdmtr
area forecast discussion
national weather service san francisco bay area
404 pm pst Tue dec 18 2018

Synopsis High surf advisories continue today. Otherwise a weak
warm front will bring cloudiness and light rain to the far north
bay. A drying trend Wednesday and Thursday is forecast for all
areas before the next weak front brings some light rain, mainly
to the north bay Thursday night. Drying trend returns Friday and
Saturday before rain chances increase Sunday into Monday.

Discussion As of 1:02 pm pst Tuesday... A storm system with
primary impacts in oregon and washington state continues to brush
the north bay this early afternoon. Parts of sonoma county have
been reporting some off on light rainfall over the past several
hours, with total rain amounts generally under a tenth of an inch.

Visible satellite imagery as of lunchtime shows the overcast
conditions blanketing the golden gate and points north, while
partly cloudy to clear conditions have prevailed from about half
moon bay and points south. As the afternoon progresses expect
temperatures to rise to the mid upper 50s across the north bay,
and as warming up to the middle 60s in the southern reaches of
monterey county. These values generally fall within several
degrees of middle december climatological normals.

Over the next 24 hours an upper level ridge will build off the
southern california coast, allowing rather tranquil weather to
prevail over the san francisco bay area and central california
coast. Can't rule out the chance of some localized fog overnight
and into Wednesday morning in the usual development locations: the
north bay valleys around santa rosa and napa, interior east bay
around livermore, and the far southern salinas valley. More of the
same is forecast on Thursday with dry conditions expected to
continue.

The next opportunity for wet weather will late Thursday and into
Friday as a weak frontal system approaches the northern
california coast. At this time, the favored locations for
receiving any sort of rainfall will be for the north bay. Rain
amounts look to be fairly minimal, but enough to create wet
roadways across parts of marin, sonoma, and napa counties. The 12z
nam extends the rain chances a bit farther south than the ecmwf
and GFS solutions, so will have to keep a close eye over the
coming days to see if rain chances need to be increased for san
francisco and locations south.

The progressive weather pattern will last into the weekend with
both the GFS and ECMWF indicating another system arriving around
Sunday. Like the preceeding systems, this one will again favor
locations north of the golden gate. A better shot widespread wet
weather will come around Tuesday or Wednesday next week. Still
some uncertainty at this point in time, but nonetheless worth
monitoring model trends over the coming days.

Aviation As of 03:55 pm pst Tuesday... Currently TAF sites
split with clouds north of the golden gate andVFR south. High
clouds will stream ahead of a frontal system with generally light
winds. There is a possibility of low clouds, developing between
09-15z Wednesday over the northern portion of the region. This may
result in MVFR, or locally lower, conditions early Wednesday
morning for these locations. Confidence is low to moderate beyond
06z Wednesday.

Vicinity of ksfo...VFR conditions and light winds early. MVFR
conditions developing anytime after 06z, but conf is moderate.

Sfo bridge approach... Similar to ksfo... Some patchy low clouds
possible over the approach tomorrow morning..

Monterey bay terminals...VFR conditions and light winds.

Beaches As of 09:45 am pst Tuesday... Hazardous beach
conditions will persist along the shoreline through this afternoon
as a large, long period northwest swell continues to gradually
subside. Breakers of 15 to 25 feet will remain possible, locally
larger at favored break points along the coast. In addition, large
wave run up is possible along the coast, particularly during high
tide. As a result, a high surf advisory remains in effect through
this afternoon. A different large, long period northwest swell
train will move into the waters late Wednesday into Thursday with
forerunners arriving earlier in the day Wednesday producing
increased risk of sneaker waves. Do not turn your back on the
ocean and stay aware of your surroundings if visiting the coast.

Marine As of 03:52 pm pst Tuesday... Locally gusty northwest
winds will continue along the big sur coast through this evening.

A weak frontal boundary stalled over the region will result in
light and variable winds across the northern waters and light
northerly winds over the southern waters through Wednesday.

Another large long-period swell will build Wednesday before
subsiding Thursday. Hazardous sea conditions will also continue
through Thursday.

Mtr watches warnings advisories
Tngt High surf advisory... Caz006-505-509-529-530
sca... Mry bay
sca... Pt arena to pt reyes 0-10 nm
sca... Pt reyes to pigeon pt 0-10 nm
sca... Pigeon pt to pt pinos 0-10 nm
sca... Pt pinos to pt piedras blancas 0-10 nm
sca... Pt arena to pigeon pt 10-60 nm
sca... Pigeon pt to pt piedras blancas 10-60 nm
sca... Rough bar advisory for sf bar
public forecast: rowe
aviation: mm
marine: rgass
visit us at

Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 13 mi43 min SW 4.1 G 8 57°F 1026.2 hPa
RCMC1 - 9414863 - Richmond, CA 14 mi43 min 56°F
TIBC1 - Tiburon Pier, San Francisco Bay, CA 15 mi44 min Calm 55°F 1027 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 16 mi43 min S 4.1 G 5.1 57°F 1026.9 hPa
FTPC1 - 9414290 - San Francisco, CA 21 mi49 min SSW 1.9 G 2.9 55°F 56°F1026.9 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 21 mi49 min NW 1.9 G 1.9 56°F 54°F1026.4 hPa56°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 22 mi43 min S 1.9 G 1.9 56°F 1026.7 hPa
PXSC1 22 mi49 min 57°F 55°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 22 mi43 min Calm G 1 56°F 1025.6 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 23 mi49 min SE 1.9 G 1.9
46237 - San Francisco Bar, CA (142) 23 mi43 min 57°F9 ft
OBXC1 23 mi43 min 56°F 53°F
LNDC1 25 mi43 min Calm G 1 56°F 1026.6 hPa
PCOC1 - 9415144 - Port Chicago, CA 25 mi43 min SSW 5.1 G 7 55°F 54°F1026.3 hPa
SFXC1 - San Francisco Bay Reserve, CA 26 mi88 min Calm 52°F 1026 hPa49°F
PRYC1 - 9415020 - Point Reyes, CA 26 mi43 min 57°F1025.9 hPa
AAMC1 - 9414750 - Alameda, CA 26 mi49 min Calm G 1 57°F 56°F1027 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 30 mi33 min S 7.8 G 9.7 58°F 58°F1026.9 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 33 mi43 min Calm G 0 56°F 1026.2 hPa
RTYC1 - 9414523 - Redwood City, CA 44 mi43 min Calm G 1.9 55°F 56°F1027.1 hPa
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 44 mi33 min SSW 7.8 G 9.7 58°F1025.9 hPa

Wind History for Richmond, CA
(wind in knots)    EDIT      (on/off)   Help
8
PM
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
Last
24hr
N3
W2
NW1
NW3
N1
NW2
NW3
NW2
W1
NW1
W2
SE4
SE3
SE3
SE5
G8
S8
S9
SE3
G6
S7
S5
G8
S3
G6
SE2
G5
S3
SE2
1 day
ago
SE9
G13
NW10
G13
NW5
G8
SE1
SE2
SE2
SE6
S7
SE4
G7
SE5
G8
SE5
SE3
G8
SE4
S5
SE3
SE6
S5
S3
SE2
--
--
NW1
NE2
SE1
2 days
ago
E1
NW1
G4
NW1
NW1
--
SE4
G9
SE4
G7
SE4
G7
SE6
G9
SE12
S9
G13
SE9
SE9
SE7
G11
SE6
G11
SE10
G14
SE10
G16
SE10
G15
S10
G14
S11
G15
SE9
G13
SE7
G15
SE6
G10
SE9
G17

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Novato / Gnoss Field, CA4 mi18 minN 010.00 miOvercast55°F55°F100%1026.4 hPa
Petaluma Municipal Airport, CA12 mi38 minE 310.00 miOvercast55°F55°F100%1026.4 hPa
Napa, Napa County Airport, CA14 mi19 minS 410.00 miOvercast57°F53°F87%1025.6 hPa

Wind History from DVO (wind in knots)
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
Last 24hrCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmSE4CalmCalmCalmCalmCalmCalmCalmCalm
1 day agoNE9NE5CalmCalmSW5CalmCalmCalmCalmCalmN4CalmS5CalmCalmN4N5N4N4N5CalmN5W3Calm
2 days agoE4CalmCalmS4SE5SE5--SE6SE7SE7S6SE6S8S7SE11
G16
S8SE12SE7SE8
G13
S7
G13
S10SE6
G11
SE8
G13
SE10

Tide / Current Tables for Petaluma River entrance, San Pablo Bay, California
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Petaluma River entrance
Click for Map
Tue -- 02:44 AM PST     Moonset
Tue -- 03:14 AM PST     1.58 feet Low Tide
Tue -- 07:21 AM PST     Sunrise
Tue -- 09:06 AM PST     6.15 feet High Tide
Tue -- 02:17 PM PST     Moonrise
Tue -- 04:38 PM PST     0.61 feet Low Tide
Tue -- 04:52 PM PST     Sunset
Tue -- 10:20 PM PST     4.36 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
3.12.41.91.61.82.53.64.85.76.265.34.43.221.20.70.71.1233.94.34.3

Tide / Current Tables for Petaluma River Approach, San Pablo Bay, California Current
   EDIT      (on/off)   Help   One Week of Data
Petaluma River Approach
Click for Map
Tue -- 02:43 AM PST     Moonset
Tue -- 02:53 AM PST     0.00 knots Slack
Tue -- 05:37 AM PST     0.74 knots Max Flood
Tue -- 07:20 AM PST     Sunrise
Tue -- 09:20 AM PST     -0.00 knots Slack
Tue -- 12:42 PM PST     -0.81 knots Max Ebb
Tue -- 02:17 PM PST     Moonrise
Tue -- 04:42 PM PST     0.00 knots Slack
Tue -- 04:52 PM PST     Sunset
Tue -- 07:19 PM PST     0.46 knots Max Flood
Tue -- 10:21 PM PST     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12
am
1
am
2
am
3
am
4
am
5
am
6
am
7
am
8
am
9
am
10
am
11
am
12
pm
1
pm
2
pm
3
pm
4
pm
5
pm
6
pm
7
pm
8
pm
9
pm
10
pm
11
pm
-0.5-0.4-0.300.40.70.70.60.40.1-0.3-0.6-0.8-0.8-0.7-0.5-0.20.10.30.50.40.30.1-0.2

Weather Map and Satellite Images
       (on/off)   HelpWeather Map
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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for San Francisco/Monterey Bay Area, CA (23,6,7,8)
      (on/off)   Help

Ground Weather Radar Station Sacramento, CA
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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.