Monday, January22, 2018 L-36.com


Marine Weather and Tides
Tiburon, 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 7:18AMSunset 5:23PM Monday January 22, 2018 8:10 AM PST (16:10 UTC) Moonrise 10:36AMMoonset 10:57PM Illumination 33% Phase: Waxing Crescent; Moon at 6 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 San Francisco Bay North Of The Bay Bridge- 221 Am Pst Mon Jan 22 2018
Today..SE winds 10 to 20 kt...decreasing to 10 kt in the afternoon. Chance of showers in the morning.
Tonight..NE winds 5 to 15 kt.
Tue..NE winds 10 kt.
Tue night..NE winds 5 kt.
Wed..SW winds 15 to 25 kt. Rain in the afternoon. Rain likely.
Thu..W winds 5 to 15 kt. Chance of showers.
Fri..NW winds 5 kt.
PZZ500 221 Am Pst Mon Jan 22 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Moderate southerly winds will continue into the morning ahead of an approaching cold front. Winds will decrease and switch to the northwest behind the frontal passage. Small craft advisories remain in place mainly due to hazardous sea conditions caused by swell. SWells will gradually decrease today and Tuesday. The next frontal system is set to arrive mid-week bringing back southerly winds and increasing northwest swell.

7 Day Forecast for Marine Location Near Tiburon, CA
   Hourly   EDIT   Help
location: 37.92, -122.42     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus66 kmtr 221344
afdmtr
area forecast discussion
national weather service san francisco bay area
544 am pst Mon jan 22 2018

Synopsis Rain will steadily diminish over the san francisco bay
area this morning. Light rain will develop as far south as the
monterey bay area this morning before diminishing this afternoon.

A dry weather break will return later today into Tuesday. The next
weather system is forecast to bring soaking rains and locally gusty
winds Wednesday and Wednesday night with showers lingering Thursday
morning. Dry weather returns again by Friday and into next weekend.

Discussion As of 5:04 am pst Monday... A cold front was slowly
moving southeastward this morning, point arena buoy indicated
frontal passage at midnight. Heavy rain and gusty winds developed
ahead of this front with isolated rain total reports 3.40" at
venado, 2.54" cazadero, and upwards of 1-2" over remaining
locations of sonoma, napa, and marin counties. From last evening
and overnight locally wind gusts peaked to near 40 mph at gualala
and monte rio, elsewhere over the bay area gusts locally reached up
to 20-30 mph.

Moisture and warm air advection prior to the cold front extended
throughout the lower levels and possibly to the mid levels at times
helping to generate a wetter frontal passage, all in all it was a
pretty good rain producer considering the mid level flow is nearly
flat, very low amplitude, and mostly devoid of positive vorticity
advection. The 12z oakland sounding shows the air saturated up to
the 700 mb level. Kmux radar reflectivities still indicate a fair
amount of showers moving west to east at this hour over the bay
area, but the trend is for showers to steadily diminish this morning
as the cold front continues to settle southward.

A dry weather break returns later today into Tuesday. Daytime
temperature recovery will be in the 50s. Night-time temperatures
will be in the 30s to mid 40s, though inland valleys may see lows
in the upper 20s due to a decrease in cloud cover tonight thus
later shifts may need to adjust min temperatures downward a little
if needed. Also, patchy valley fog becomes a little more probable
if it clears out at night.

The next upstream wet weather system is expected to arrive wed-thu,
the incoming developing rain band may be a little slower to arrive
per most recent model output forecasting a delay up to 6 hours. A
strong cold front will interact with strengthening warm air advection,
coupled with large scale dynamics greatly favoring more widespread
soaking rain. The 250 mb jet stream will dig in from the northwest
increasing cyclonic curvature over the forecast area supporting stronger
upper level divergence. The ECMWF and NAM indicate a surface trough
and cold front sweeping in from the northwest later Wednesday. The
00z WRF model run indicates surface to 850 mb winds will be mainly
southwest which would limit rain shadowing effects in the valleys and
greatly increase QPF along windward slopes. To varying degrees recent
model data (within the last month or so) is seemingly more problematic
with regard to wind, QPF forecasts, thus this system normally would
of course need to be watched closely, but as always it's the unknowns
of pacific weather systems that can catch one off-guard sometimes.

This system may be one or our wetter rain producers we've seen so
far this season. Precipitable water values will be between 0.80" and
1" with warm air advection interacting with modified polar air, orographic
forcing, and strong dynamics. After this we get a break from the rain
with upper level ridging returning for late week and the weekend.

Aviation As of 03:34 am pst Monday... For 12z tafs. Kmux radar
still shows showers moving through the sf bay area. MVFR cigs
will continue periodically until this afternoon. Any lingering
heavier showers may temporarily reduce vis to MVFR as well.

Showers should be out of the north bay sf bay areas by around
18 20z. CIGS are expected to lower back to MVFR once again
tonight. Light winds.

Vicinity of ksfo... MVFR CIGS with showers currently passing
through. Conditions improving after 18z becomingVFR after 22z.

Southeast winds 5-10 kt becoming west after 20-22z.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Currently MVFR at kmry withVFR CIGS at
ksns. Borderline MVFRVFR conditions through this afternoon. Some
light rain periodically from 12z-18z.

Marine As of 02:21 am pst Monday... Moderate southerly winds
will continue into the morning ahead of an approaching cold front.

Winds will decrease and switch to the northwest behind the frontal
passage. Small craft advisories remain in place mainly due to
hazardous sea conditions caused by swell. Swells will gradually
decrease today and Tuesday. The next frontal system is set to
arrive mid-week bringing back southerly winds and increasing
northwest swell.

Mtr watches warnings advisories
Tday Sca... Mry bay until 3 pm
sca... Pt reyes to pigeon pt 0-10 nm until 3 pm
sca... Pigeon pt to pt pinos 0-10 nm until 3 pm
sca... Pt arena to pt reyes 0-10 nm
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... Rough bar advisory for sf bar
public forecast: canepa
aviation: as
marine: as
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
RCMC1 - 9414863 - Richmond, CA 1 mi41 min SE 5.1 G 8.9 53°F 53°F1025.1 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 3 mi41 min SE 8 G 12 53°F 1025.7 hPa
FTPC1 - 9414290 - San Francisco, CA 8 mi41 min WSW 7 G 9.9 54°F 54°F1025.6 hPa
PXSC1 8 mi41 min 54°F 54°F
OBXC1 9 mi41 min 51°F 51°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 9 mi41 min SE 9.9 G 13 52°F 1024.4 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 9 mi41 min SE 7 G 9.9 51°F 1025.6 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 10 mi41 min SE 13 G 14
LNDC1 11 mi41 min ESE 2.9 G 6 51°F 1025.5 hPa
AAMC1 - 9414750 - Alameda, CA 12 mi41 min ESE 12 G 15 51°F 53°F1025.5 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 13 mi41 min SW 8 G 9.9 54°F 1025 hPa
46237 - San Francisco Bar, CA (142) 15 mi71 min 54°F10 ft
MZXC1 - 9415102 - Martinez-Amorco CA 18 mi41 min NNE 1.9 G 2.9 52°F 52°F1025.4 hPa52°F
PCOC1 - 9415144 - Port Chicago, CA 22 mi41 min ENE 4.1 G 6 49°F 51°F1025.3 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 25 mi81 min NW 14 G 16 53°F 54°F12 ft1025.3 hPa (+0.4)
SFXC1 - San Francisco Bay Reserve, CA 28 mi86 min SE 5.1 48°F 1025 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 29 mi41 min SE 8.9 G 11 47°F 1025.3 hPa
PRYC1 - 9415020 - Point Reyes, CA 30 mi41 min WNW 13 G 18 53°F1025.5 hPa
RTYC1 - 9414523 - Redwood City, CA 31 mi41 min SE 5.1 G 7 51°F 54°F1026.1 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 46 mi81 min WSW 16 G 19 56°F 56°F15 ft1025 hPa (+0.0)

Wind History for Richmond, CA
(wind in knots)    EDIT      (on/off)   Help
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
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
Last
24hr
E1
G4
S6
G9
SE5
G8
SE5
G8
S7
S8
SE5
S6
SE4
S6
S6
S7
S6
G9
S10
G13
SE9
G12
S10
G19
SE10
G13
SE10
G13
SE11
G15
SE11
G17
SE11
G17
SE11
G14
SE8
G13
S8
G12
1 day
ago
N4
N3
N3
NW4
SW2
S3
SE3
SE3
G6
S4
NW8
G12
NW8
G11
NW8
G12
NW6
NW8
N4
N2
N3
E3
NW1
NW1
S5
S2
NW4
N2
2 days
ago
NW4
NW3
S2
NW2
N6
E3
G11
S3
S3
W1
W9
G12
NW8
G11
NW7
G10
NW8
G11
NW7
NW7
G10
NW8
G11
NW8
NW8
W7
--
NE3
N8
NW4
N6

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Novato / Gnoss Field, CA17 mi36 minN 010.00 miOvercast54°F53°F100%1025.4 hPa
Oakland, Metro Oakland International Airport, CA19 mi18 minSE 121.00 miLight Rain Fog/Mist50°F50°F100%1025.8 hPa
Concord, Buchanan Field, CA20 mi18 minSSW 84.00 miFog/Mist54°F52°F93%1024 hPa
San Francisco, San Francisco International Airport, CA21 mi75 minSE 55.00 miLight Rain Fog/Mist54°F51°F90%1025.3 hPa
Napa, Napa County Airport, CA21 mi17 minE 610.00 miOvercast52°F51°F97%1024.6 hPa
Hayward, Hayward Air Terminal, CA24 mi17 minSSE 102.50 miLight Rain52°F46°F83%1026.6 hPa

Wind History from DVO (wind in knots)
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
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
Last 24hrCalmCalmNE3CalmCalmCalmSE4SW6
G12
SW8S6S7S8SE6SE5S7S8S5
G10
SE10SE7SE6SE5CalmCalmSE3
1 day agoN5N13NW7NW9NW11NW13W5
G11
W5W7W8
G14
W6NE4NW6
G12
4CalmCalmCalmCalmCalmCalmCalmN4CalmS3
2 days agoN3CalmCalmCalmNW6NW7W6NW7W8W9NW6NW11NW8NW10NW13NW11NW10NW5N8N10N9N9N114

Tide / Current Tables for Chevron Oil Company Pier, Richmond, San Francisco Bay, California
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Chevron Oil Company Pier
Click for Map
Mon -- 03:39 AM PST     5.41 feet High Tide
Mon -- 07:20 AM PST     Sunrise
Mon -- 09:19 AM PST     2.42 feet Low Tide
Mon -- 10:35 AM PST     Moonrise
Mon -- 02:55 PM PST     4.97 feet High Tide
Mon -- 05:21 PM PST     Sunset
Mon -- 09:20 PM PST     0.82 feet Low Tide
Mon -- 10:57 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.83.94.85.35.454.33.52.82.42.52.93.64.34.854.74.13.22.21.30.80.91.5

Tide / Current Tables for Red Rock .1 E, San Francisco Bay, California Current
   EDIT      (on/off)   Help   One Week of Data
Red Rock .1 E
Click for Map
Mon -- 01:57 AM PST     1.20 knots Max Flood
Mon -- 05:40 AM PST     -0.00 knots Slack
Mon -- 07:21 AM PST     Sunrise
Mon -- 08:03 AM PST     -1.12 knots Max Ebb
Mon -- 10:35 AM PST     Moonrise
Mon -- 11:12 AM PST     0.00 knots Slack
Mon -- 02:10 PM PST     0.79 knots Max Flood
Mon -- 05:16 PM PST     -0.00 knots Slack
Mon -- 05:22 PM PST     Sunset
Mon -- 08:14 PM PST     -1.31 knots Max Ebb
Mon -- 10:57 PM PST     Moonset
Mon -- 11:15 PM PST     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.71.11.21.10.80.3-0.2-0.8-1.1-0.9-0.5-0.10.30.60.80.70.50.1-0.4-1-1.3-1.2-0.7-0.1

Weather Map and Satellite Images
       (on/off)   Help
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 (11,2,3,4)
      (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.