Monday, September16, 2019 L-36.com


Marine Weather and Tides
Rutherford, CA

Version 3.4
NOTICE
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:49AMSunset 7:19PM Sunday September 15, 2019 11:46 PM PDT (06:46 UTC) Moonrise 7:29PMMoonset 7:06AM Illumination 95% Phase: Waning Gibbous; Moon at 17 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
PZZ531 San Francisco Bay South Of The Bay Bridge- 923 Pm Pdt Sun Sep 15 2019
Tonight..W winds 5 to 15 kt. Gusts up to 20 kt this evening. A slight chance of rain after midnight.
Mon..W winds 10 to 20 kt with gusts up to 25 kt. A chance of rain.
Mon night..NW winds 10 to 20 kt with gusts up to 25 kt.
Tue..NW winds 5 to 15 kt.
Tue night..W winds 5 to 15 kt.
Wed..SW winds 5 to 15 kt.
Wed night..W winds 5 to 10 kt.
Thu..W winds 10 to 20 kt.
Fri..W winds 5 to 15 kt.
PZZ500 923 Pm Pdt Sun Sep 15 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Expect locally breezy evening winds along the inner coastal waters south of pigeon point and over the bays. Winds will ease early this week as high pressure over the eastern pacific weakens. A cold front will move through the waters on Monday bringing a chance of showers. Mixed seas will continue with moderate period northwest swell and a slightly longer period southerly swell.


7 Day Forecast for Marine Location Near Rutherford, CA
   Hourly   EDIT   Help
location: 38.5, -122.39     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus66 kmtr 160609
afdmtr
area forecast discussion
national weather service san francisco bay area
1109 pm pdt Sun sep 15 2019

Synopsis A cold front will spread light rain across much of
our area tonight and Monday, and result in much cooler weather
for inland areas. Tuesday will be dry and mild. A second weather
system may bring scattered showers to the north bay on Wednesday,
and also keep temperatures on the cool side of normal through
Thursday. Warmer weather is forecast from Friday on into next
weekend.

Discussion As of 8:55 pm pdt Sunday... The marine layer rapidly
deepened today as an early season storm system approached from
the northwest. In addition, onshore flow ramped up this afternoon
and locally strong and gusty winds are currently being observed,
primarily near altamont pass in the east bay where winds are
have been gusting as high as 50 mph this evening. The combination
of a deep marine layer and robust onshore flow resulted in
significant inland cooling today, with high temperatures in the
inland valleys and hills cooling by as much as 20 degrees from
yesterday. The only portion of our forecast area that remained
very warm today was the southern interior of monterey county and
southern san benito county where highs were in the lower to mid
90s.

Current satellite shows a well defined frontal rain band dropping
south along the northern california coast. Crescent city, on the
far northern california coast, has picked up nearly three-quarters
of an inch of rain (0.72") from this system today. Latest
satellite-derived precipitable water (pw) values remain
relatively impressive, with a narrow band of pws around 1.5 inches
along the frontal boundary. The models agree that precipitation
potential with the front will decrease as the front pushes south
into a drier airmass. However, given the history of rainfall with
this system, and current satellite data, it seems reasonable to
expect measurable rain across much of the sf bay area late tonight
and Monday morning and even some measurable rain as far south as
monterey and big sur by Monday afternoon. Drizzle is already being
reported in san francisco as low level moisture convergence
increases ahead of the approaching front. Will likely see areas of
drizzle continue near the coast and in the coastal hills prior to
the actual frontal rain band reaching our area later tonight and
Monday morning.

The 00z NAM shows precipitation along the frontal boundary
dissipating just as the boundary reaches the north bay late this
evening. But the NAM then forecasts enhancement along the front
as it pushes just to the south of san francisco shortly after
sunrise on Monday morning. The 18z GFS shows this enhancement too,
but earlier and farther north. Forecast precipitation totals from
this system are hard to pin down as the models, particularly the
mesoscale models, forecast very spotty qpf, presumably due to
embedded convective elements developing along the frontal
boundary. The latest hrrr forecast values ranging from nothing in
the north bay valleys to isolated amounts up to a half inch along
the san mateo county coast and locally in the east bay hills. The
nam also forecasts up to a half inch in a band from southern san
mateo county across northern santa clara county. The upshot is
that precipitation totals by late tomorrow will likely vary
considerably, and potentially over short distances.

Ir satellite is showing lots of cold air behind the incoming front
and models forecast a fair amount of instability along the
frontal boundary late tonight and Monday. But the most unstable
air is projected to be to our east and this is where the storm
prediction center shows a slight risk of thunderstorms on Monday.

If isolated thunderstorms do develop in our area, they would most
likely occur along the eastern fringes of the east bay.

Dry conditions will return to all areas by late Monday and Tuesday
looks to be a dry and mild day. The next system is forecast to
drop in from the northwest late Tuesday night into Wednesday, and
perhaps generate scattered showers in the north bay. The midweek
system will have more of an inland trajectory, which could mean
the development of gusty northerly winds on the back side of the
trough Wednesday night into Thursday, mainly in the north and east
bay hills.

The midweek system will bring a reinforcing shot of cool air into
our region and keep temperatures on the cool side of normal
through Thursday, especially inland. Warming is then anticipated
late in the work week and into next weekend when the models
generally agree that a ridge will build over california.

Aviation As of 11:09 pm pdt Sunday... A fairly solid influx of
low clouds, patchy drizzle, gusty winds aloft with increasing
water vapor per higher dew point temperatures in the upper 50s to
lower 60s all since mid afternoon.

The 06z tafs indicate increasing areal coverage of MVFR cloud
ceilings with local ifr ceilings and visibilities lowering in
additional patches of drizzle to rain developing early Monday
morning. Strong mid-latitude influence arriving in our CWA with an
amplifying 500 mb trough and surface cold frontal passage Monday
morning. With aforementioned moisture in place and vigorous
dynamics rolling through Monday am abandoning recent model output
to some extent and decided to go slightly more adverse weather
conditions with morning frontal passage including bumping up post
cold frontal winds a bit more above statistical guidance. The 500
mb trough energy is splitting to some extent, but also think the
models are exhibiting difficulty resolving the placement of key
features. Thus would rather lean a bit more pessimistic than
optimistic in this TAF cycle. Low level wind shear added for ksts
and klvk til 11z and 12z respectively.

Vicinity of ksfo... MVFR tonight with light rain arriving by 10z
then moderate to possibly briefly heavy rain 13z-18z Monday.

Decided to bump up post frontal winds above guidance for Monday.

Improving ceiling conditions and drier Monday afternoon.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... MVFR-ifr tonight and Monday morning, patchy
drizzle possible tonight. Light rain Monday morning, but could be
briefly moderate until frontal passage. Improving ceiling conditions
and drier Monday afternoon.

Marine As of 10:34 pm pdt Sunday... Expect locally breezy
evening winds along the inner coastal waters south of pigeon point
and over the bays. Winds will ease early this week as high
pressure over the eastern pacific weakens. A cold front will move
through the waters on Monday bringing a chance of showers. Mixed
seas will continue with moderate period northwest swell and a
slightly longer period southerly swell.

Mtr watches warnings advisories
Tngt Sca... Pt pinos to pt piedras blancas 0-10 nm until 3 am
public forecast: dykema
aviation marine: canepa
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
SFXC1 - San Francisco Bay Reserve, CA 28 mi61 min W 12 66°F 1010 hPa61°F
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 31 mi46 min W 12 G 15 68°F 1010.5 hPa (+0.4)
MZXC1 - 9415102 - Martinez-Amorco CA 35 mi46 min SW 6 G 9.9 67°F 71°F1011 hPa (+0.8)
UPBC1 35 mi46 min WSW 9.9 G 13
PCOC1 - 9415144 - Port Chicago, CA 36 mi46 min WSW 11 G 13 67°F 71°F1010.8 hPa (+0.7)
RCMC1 - 9414863 - Richmond, CA 40 mi52 min SSE 4.1 G 6 65°F 65°F1011 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 41 mi46 min S 11 G 12 64°F 1011.5 hPa (+0.4)
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 41 mi46 min W 12 G 19 68°F 1009.8 hPa (+0.4)
PRYC1 - 9415020 - Point Reyes, CA 47 mi46 min 54°F1011.4 hPa (+0.0)
FTPC1 - 9414290 - San Francisco, CA 48 mi46 min SW 2.9 G 8.9 61°F 62°F1011.7 hPa (+0.0)
OBXC1 48 mi46 min 63°F 63°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 48 mi46 min W 6 G 7 64°F 1011.6 hPa (+0.6)
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 48 mi46 min W 2.9 G 4.1
PXSC1 48 mi46 min 64°F 64°F
LNDC1 49 mi46 min W 8 G 9.9 65°F 1011.5 hPa (+0.4)

Wind History for Martinez-Amorco Pier, CA
(wind in knots)    EDIT      (on/off)   Help
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
Last
24hr
NW8
W9
NW5
SW4
G7
W6
W3
SW2
SW2
G6
W8
NW7
NW12
W10
G13
W14
W14
G17
SW11
G15
W14
G17
W18
W20
W20
W13
G17
SW11
G14
W11
G14
SW9
G12
SW6
G10
1 day
ago
W5
W7
W6
W9
W9
W8
W7
W8
W7
W7
W7
W8
NW12
W11
NW9
G12
NW9
W12
SW9
NW12
W11
NW4
G8
NW10
NW10
NW10
2 days
ago
SW3
SW3
SW3
--
NE5
NE4
NE4
NE4
NE4
NE4
NE3
NE3
W4
W3
W6
G10
W12
NW8
S1
SW4

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports. Follow links for more data.
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Petaluma Municipal Airport, CA20 mi3.2 hrsVar 69.00 mi64°F64°F100%1010.8 hPa

Link to 5 minute data for KO69

Wind History from O69 (wind in knots)
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
12
AM
Last 24hrCalmN4N44CalmCalmCalmCalmCalmCalmCalmCalm4W13
G18
W11
G20
W16
G25
W19
G25
W14
G24
W17
G23
NW8
G19
W6
G19
W8
G17
NW55
1 day agoW3CalmCalmCalmCalmW3CalmCalmW5CalmW3CalmCalmCalm5
G10
W13W9W96NW4NW5CalmCalmCalm
2 days agoCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm443
G10
CalmW12NW75W4CalmNW4CalmCalm

Tide / Current Tables for Napa, Napa River, Carquinez Strait, California
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Napa
Click for Map
Mon -- 03:36 AM PDT     6.65 feet High Tide
Mon -- 06:51 AM PDT     Sunrise
Mon -- 09:02 AM PDT     Moonset
Mon -- 10:06 AM PDT     1.13 feet Low Tide
Mon -- 04:03 PM PDT     6.77 feet High Tide
Mon -- 07:15 PM PDT     Sunset
Mon -- 08:54 PM PDT     Moonrise
Mon -- 10:31 PM PDT     1.36 feet Low 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
3.14.45.76.56.66.153.72.41.51.11.52.53.85.26.36.86.55.64.43.121.41.5

Tide / Current Tables for Napa, Napa River, California
   EDIT      (on/off)   Help   One Week of Data
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Weather Map
       (on/off)   Help Weather Map
wmap_P
GEOS 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 (2,6,7,8)
      (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.