Monday, May27, 2019 L-36.com


Marine Weather and Tides
Napa, 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 5:48AMSunset 8:24PM Monday May 27, 2019 4:05 AM PDT (11:05 UTC) Moonrise 1:31AMMoonset 12:48PM Illumination 40% Phase: Third Quarter Moon; Moon at 23 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- 221 Am Pdt Mon May 27 2019
.small craft advisory in effect from 9 am pdt this morning through this evening...
Today..SW winds 5 to 15 kt. Gusts up to 25 kt this afternoon.
Tonight..W winds 5 to 15 kt with gusts up to 25 kt.
Tue..SW winds 10 to 20 kt with gusts up to 25 kt.
Tue night..SW winds 5 to 15 kt.
Wed..SW winds 10 to 20 kt with gusts up to 25 kt.
Wed night..SW winds 5 to 15 kt.
Thu..SW winds 5 to 15 kt.
Fri..W winds 5 to 15 kt.
PZZ500 221 Am Pdt Mon May 27 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Surface high pressure over the eastern pacific will remain nearly stationary through late week. Winds will decrease this morning before becoming breezy again this afternoon. Northwest winds will strengthen further and become breezy to gusty Tuesday and Wednesday. Moderate northwest swell continues during the week with steep fresh seas generated by gusty winds.


7 Day Forecast for Marine Location Near Napa, CA
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location: 38.3, -122.28     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 271024
afdmtr
area forecast discussion
national weather service san francisco bay area
324 am pdt Mon may 27 2019

Synopsis Slight warming is expected today, but temperatures
will remain well below seasonal averages. More robust warming on
Tuesday and Wednesday will bring temperatures back to near normal
by midweek. Dry conditions are expected to prevail for most areas
during the remainder of the week and into next weekend.

Discussion As of 3:20 am pdt Monday... The cold upper low that
brought scattered showers, isolated thunderstorms, and
unseasonably cool temperatures to our area on Sunday has moved
well off to our southeast and is currently centered near las
vegas. Moisture wrapping around the back side of the departing low
continues to result in isolated very light showers in our area,
and a few sprinkles may linger through mid morning. But for the
most part, today should be a dry day under partly cloudy skies
(although some coastal areas may remain mostly cloudy).

Temperatures will recover slightly from Sunday's chilly readings,
with afternoon highs today forecast to be about five degrees
warmer than yesterday. Even so, temps today will remain much
cooler than normal.

The models agree that a weak shortwave trough will drop south out
of oregon this evening and track across our area late tonight.

The NAM generates scattered very light precipitation across our
area tonight as the disturbance passes, but most other models
maintain dry conditions. With considerable low level moisture
remaining over our area, it's not out of the question there could
be some isolated drizzle or very light rain overnight, but
measurable rainfall is not likely. The national blend of models
(nbm) forecasts slight rain chances only across a small area in
the hills of northwest monterey county overnight, and this seems
reasonable.

The shortwave trough will pass to our south by Tuesday and weak
shortwave ridging is expected to develop by afternoon. This
ridging should result in enough subsidence to produce a mostly
sunny afternoon along with more significant warming. The warming
trend is forecast to continue into Wednesday when high
temperatures will finally warm back to near seasonal averages.

The warming trend will stall on Thursday, or even reverse a bit,
as yet another weak upper level system moves in from the north and
settles into northeast california. Most model output indicates no
rain in our area with this system, but the GFS indicates a
potential for light rain in the north bay. The nbm keeps pops
below 10 percent on Thursday, so will keep rain chances out of the
forecast for now.

Longer range models generally agree that an upper ridge over the
eastern pacific will gradually build inland across northern
california over the weekend and into early next week. This would
put an end to any lingering precipitation chances and also bring
about more summer-like temperatures late in the forecast period.

Aviation As of 10:56 pm pdt Sunday... Scattered showers remain
this evening, mainly south of sf bay. The upper low which caused
more widespread showers and isolated thunderstorms earlier in the
day is departing to our southeast, and showers will continue to
decrease in coverage overnight. A few isolated showers may linger
near the monterey bay terminals into early Monday morning before
ending completely. A mix ofVFR MVFR currently with MVFR
conditions becoming more widespread overnight and into Monday.

Models at this time do not bring much clearing Monday afternoon so
could see CIGS continuing through most of Monday. Light winds
overnight becoming onshore with 10-15 kt on Monday afternoon.

Vicinity of ksfo... Showers have generally ended for the night at
the terminal. Expect CIGS of 1500-2500 feet overnight continuing
through Monday morning. CIGS expected to lift to 2500-3500 Monday
afternoon but may not completely erode. West winds 5-10 kt
overnight with 10-15 kt and gusts to 20 kt Monday afternoon.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Vcsh through the overnight hours with a
few isolated showers possibly lingering into Monday morning. Cigs
of 1000-2000 feet expected overnight through Monday morning. MVFR
likely to persist into Monday afternoon with CIGS of 2000-3000
feet.

Marine As of 2:21 am pdt Monday... Surface high pressure over
the eastern pacific will remain nearly stationary through late
week. Winds will decrease this morning before becoming breezy
again this afternoon. Northwest winds will strengthen further and
become breezy to gusty Tuesday and Wednesday. Moderate northwest
swell continues during the week with steep fresh seas generated by
gusty winds.

Mtr watches warnings advisories
Tday Sca... Pt arena to pt reyes 0-10 nm until 3 am
sca... Pigeon pt to pt pinos 0-10 nm until 3 am
sca... Pt pinos to pt piedras blancas 0-10 nm until 3 am
sca... Pt arena to pigeon pt 10-60 nm until 3 am
sca... Pigeon pt to pt piedras blancas 10-60 nm until 3 am
sca... Pt reyes to pigeon pt 0-10 nm from 3 pm
sca... Pigeon pt to pt pinos 0-10 nm from 3 pm
sca... Pt pinos to pt piedras blancas 0-10 nm from 3 pm
sca... Pt arena to pt reyes 0-10 nm from 9 am
sca... Pt arena to pigeon pt 10-60 nm from 9 am
sca... Sf bay from 9 am
sca... Mry bay from 9 am
public forecast: dykema
aviation: st
marine: canepa
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
SFXC1 - San Francisco Bay Reserve, CA 15 mi81 min WNW 4.1 51°F 1016 hPa48°F
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 17 mi36 min SSW 6 G 7 53°F 1015.4 hPa
UPBC1 20 mi36 min W 2.9 G 5.1
MZXC1 - 9415102 - Martinez-Amorco CA 20 mi36 min SSW 2.9 G 4.1 53°F 62°F1015.7 hPa53°F
PCOC1 - 9415144 - Port Chicago, CA 21 mi36 min SSW 4.1 G 6 51°F 62°F1015.6 hPa
RCMC1 - 9414863 - Richmond, CA 27 mi36 min NW 5.1 G 7 53°F 60°F1015.7 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 28 mi36 min W 4.1 G 7 54°F 1015.2 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 28 mi36 min W 2.9 G 4.1 54°F 1016.1 hPa
OBXC1 34 mi36 min 53°F 51°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 34 mi36 min SW 2.9 G 4.1 53°F 1015.9 hPa
PXSC1 35 mi36 min 53°F 51°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 35 mi36 min W 4.1 G 6 52°F 1014.8 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 35 mi36 min SW 5.1 G 6
LNDC1 35 mi36 min SW 4.1 G 6 53°F 1015.9 hPa
FTPC1 - 9414290 - San Francisco, CA 36 mi36 min SW 2.9 G 4.1 51°F 59°F1016 hPa
AAMC1 - 9414750 - Alameda, CA 37 mi42 min SW 4.1 G 6 53°F 62°F1016.3 hPa
46237 - San Francisco Bar, CA (142) 40 mi36 min 57°F4 ft
PRYC1 - 9415020 - Point Reyes, CA 42 mi36 min 53°F1015.9 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 48 mi36 min NW 14 G 18 53°F 54°F1016.6 hPa

Wind History for Union Pacific Rail Road Bridge (UPRR), CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Napa, Napa County Airport, CA6 mi12 minN 010.00 miFair48°F46°F96%1014.6 hPa
Petaluma Municipal Airport, CA17 mi31 minN 010.00 miOvercast45°F44°F100%1015.9 hPa
Vacaville Nut Tree Airport, CA18 mi13 minWSW 310.00 miA Few Clouds53°F48°F86%1015.2 hPa
Novato / Gnoss Field, CA18 mi31 minNNW 49.00 miFair45°F44°F100%1015.9 hPa
Fairfield / Travis Air Force Base, CA19 mi68 minSW 910.00 miPartly Cloudy52°F47°F85%1015.9 hPa

Wind History from APC (wind in knots)
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W17W16W15W13W8W8SW9SW7CalmE3SE3CalmCalmCalmCalm
1 day agoW10SW8SW8SW6SW5S5SW6S8SW11SW11S13SW14S15S15W8SW10S15S15
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2 days agoNW6NW5NW6NW6W4W4W4W8W8SW10S14
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Tide / Current Tables for Napa, Napa River, Carquinez Strait, California
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Napa
Click for Map
Mon -- 02:30 AM PDT     Moonrise
Mon -- 04:25 AM PDT     2.43 feet Low Tide
Mon -- 05:49 AM PDT     Sunrise
Mon -- 08:51 AM PDT     5.32 feet High Tide
Mon -- 01:48 PM PDT     Moonset
Mon -- 03:53 PM PDT     0.70 feet Low Tide
Mon -- 08:23 PM PDT     Sunset
Mon -- 10:36 PM PDT     6.29 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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5.34.43.52.82.52.63.24.255.35.14.43.52.51.50.90.71.123.24.55.56.26.3

Tide / Current Tables for Mare Island Strait, So Vallejo, San Pablo Bay, California Current
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Mare Island Strait
Click for Map
Mon -- 12:10 AM PDT     -1.40 knots Max Ebb
Mon -- 02:29 AM PDT     Moonrise
Mon -- 03:28 AM PDT     0.00 knots Slack
Mon -- 05:50 AM PDT     Sunrise
Mon -- 06:25 AM PDT     0.88 knots Max Flood
Mon -- 08:57 AM PDT     -0.00 knots Slack
Mon -- 11:36 AM PDT     -1.79 knots Max Ebb
Mon -- 01:48 PM PDT     Moonset
Mon -- 03:36 PM PDT     0.00 knots Slack
Mon -- 07:34 PM PDT     1.57 knots Max Flood
Mon -- 08:22 PM PDT     Sunset
Mon -- 10:40 PM PDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-1.4-1.3-0.9-0.30.30.70.90.80.5-0-1.1-1.7-1.8-1.6-1.2-0.50.30.91.31.51.51.20.5-0.4

Weather Map and Satellite Images
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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 (7,2,3,4)
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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.