Tuesday, November21, 2017 L-36.com


Marine Weather and Tides
Bloomfield, 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 6:58AMSunset 4:55PM Tuesday November 21, 2017 2:13 AM PST (10:13 UTC) Moonrise 9:37AMMoonset 7:42PM Illumination 7% Phase: Waxing Crescent; Moon at 3 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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PZZ540 Point Arena To Point Reyes To 10 Nm- 847 Pm Pst Mon Nov 20 2017
Tonight..SE winds 10 to 20 kt. Wind waves 2 to 4 ft. NW swell 3 to 4 ft at 12 seconds. Slight chance of showers late in the evening, then slight chance of rain after midnight.
Tue..SE winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 3 to 4 ft at 11 seconds.
Tue night..SE winds 5 to 15 kt. Wind waves 3 ft in the evening...becoming 2 ft or less. W swell 4 to 6 ft at 10 seconds.
Wed..SW winds 10 kt. Wind waves 2 ft or less. SW swell 6 to 7 ft at 12 seconds.
Wed night..W winds 10 kt. Wind waves 2 ft or less. W swell 4 to 6 ft at 16 seconds. Slight chance of rain.
Thanksgiving day..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 5 to 7 ft. Chance of rain, then slight chance of rain.
Fri..N winds 10 kt. Wind waves 2 ft or less. W swell 5 to 7 ft...becoming 5 to 6 ft. Slight chance of rain.
Sat..SE winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 4 to 6 ft. Slight chance of rain, then chance of rain.
PZZ500 847 Pm Pst Mon Nov 20 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... An upper level ridge will build over california through mid-week then weaken late in the week. Very moist, southwesterly flow extending into the pacific northwest and far northern california will overlap the bay area, north central coast and its coastal waters through late week. A cold front will move quickly across the coastal waters and bays Sunday into Sunday evening. Seas will be light to moderate through Tuesday, then slightly increase mid to late week as west to northwest swell increases.

7 Day Forecast for Marine Location Near Bloomfield, CA
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location: 38.36, -122.86     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 210548
afdmtr
area forecast discussion
national weather service san francisco bay area
947 pm pst Mon nov 20 2017

Synopsis A few showers are still possible over the north bay
tonight. High pressure will bring dry and warmer weather to the
area Tuesday through Thursday. The next chance of rain will be
late this weekend.

Discussion As of 8:00 pm pst Monday... Rain has mostly come to
an end across our region with almost all precipitation confined to
portions of the north bay. Totals were above forecast in a few
locations with amounts up to nearly 1" recorded. However, those
spots were in the minority. In general 1 10" to 1 4" was recorded
which was close to the forecast. For the rest of the san francisco
and monterey bay region just a mix of Sun and clouds today (more
sunshine to the south) with highs in the 60s to the lower 70s. Not
completely out of the questions that a few more tips of the bucket
could be recorded tonight for northern napa and sonoma counties,
so will leave that mention in the forecast.

The main story remains the building ridge of high pressure which
will continue to nudge into our region from the south. At the same
time winds at the surface will become light to offshore and 850
mb temperatures will increase by as much as 7 c. These factors
will combine to bring very warm mid-november temperatures to our
area especially south of san francisco. Highs the next two days
will be in the 70s to mid 80s for the southern half of our cwa. A
few record highs are not even out of the question on either day
with the current temperature forecast within a few degrees of
record values for many spots. For the northern half, highs will be
a bit cooler due to more cloud cover and closer proximity to the
storm track. Generally 60s to lower 70s can be expected tomorrow
and Wednesday.

Please see the previous discussion for the remainder of the
forecast for thanksgiving into the weekend...

Previous discussion By thanksgiving the ridge flattens a
little and begins to shift eastward. The weakening ridge will
allow for slightly cooler temperatures and about a 15-20% chc for
precip across the north bay as a cold front approaches. Models
have been trending drier during this time period and tend to keep
precip confined to north of the golden gate. Medium range models
continue to struggle with a unified solution for Friday and into
weekend. One thing that they show is a slight chance for showers
for the far northern areas of the north bay, but differing
details. Either way, rainfall amounts will be minimal at best
Friday and into the weekend.

Aviation As of 9:47 pm pst Monday... Little change from this
afternoon's weather, metars showVFR most places while it's
MVFR ifr over the north bay. The bay area and north central coast
remain near the eastern edge of a very moist and milder flow from
the sub-tropics. Correction to my earlier statement that the ecmwf
and GFS had much higher rhs in the 850 mb to 300 mb layer tonight
compared to yesterday's output for tonight... Actually recent ecmwf
and GFS are in-line and consistent with last night's output. Thus
a mix of cloud layers persist overnight... Then mid level drying
under an amplifying 500h ridge arrives Tuesday. 06z tafs go with
this, though there's still generally a lowering confidence in the
height of cloud bases especially Tuesday morning in the pre-dawn
hours when radiative cooling has its best potential. The air is near
saturation in the north bay which is where the best chances for fog
are tonight.

Vicinity of ksfo... Despite an influx of milder, moister air the
higher cloud layers have prevailed this evening. Adjusted the 06z
taf to reflect slightly higher cloud bases VFR with tempo group
remaining in the TAF for Tuesday morning, best guess is thatVFR
stands a pretty good chance of prevailing at ksfo into Tuesday as
long as radiative cooling is limited into Tuesday morning.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... A little better than moderate confidence
vfr persists tonight into Tuesday. Mainly light e-se winds except
up to 10 knots ksns Tuesday morning. Winds trending light onshore
Tuesday afternoon.

Marine As of 9:06 pm pst Monday... An upper level ridge will
build over california through mid-week then weaken late in the
week. Very moist, southwesterly flow extending into the pacific
northwest and far northern california will overlap the bay area,
north central coast and its coastal waters through late week. A
cold front will move quickly across the coastal waters and bays
Sunday into Sunday evening. Seas will be light to moderate through
Tuesday, then slightly increase mid to late week as west to
northwest swell increases.

Mtr watches warnings advisories
Tngt None.

Public forecast: bell mm
aviation marine: canepa
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 25 mi34 min E 16 G 19 58°F 57°F1019.6 hPa54°F
PRYC1 - 9415020 - Point Reyes, CA 26 mi44 min Calm G 1.9 56°F1019.3 hPa
RCMC1 - 9414863 - Richmond, CA 38 mi44 min ENE 4.1 G 8 58°F 58°F1020.4 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 38 mi44 min ESE 19 G 24 55°F 1020.3 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 41 mi44 min ENE 1.9 G 7 60°F 1020.7 hPa
46237 - San Francisco Bar, CA (142) 41 mi44 min 57°F4 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 42 mi84 min E 9.7 G 12 58°F 57°F4 ft1019.6 hPa (-0.3)
46214 - Point Reyes, CA (029) 43 mi44 min 59°F6 ft
FTPC1 - 9414290 - San Francisco, CA 44 mi44 min N 14 G 16 57°F 57°F1020.6 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 45 mi44 min E 6 G 11 54°F 58°F1022.2 hPa54°F
PXSC1 46 mi44 min 59°F 55°F
SFXC1 - San Francisco Bay Reserve, CA 46 mi89 min E 8.9 52°F 1021 hPa51°F
OBXC1 47 mi44 min 58°F 56°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 47 mi44 min NNW 2.9 G 4.1 58°F 1020.4 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 48 mi44 min NNW 2.9 G 5.1
PCOC1 - 9415144 - Port Chicago, CA 48 mi44 min ENE 9.9 G 13 55°F 58°F1021.9 hPa

Wind History for Point Reyes, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Santa Rosa, Santa Rosa Sonoma County Airport, CA11 mi24 minN 03.00 miFog/Mist53°F53°F100%1019.8 hPa
Petaluma Municipal Airport, CA15 mi19 minSE 76.00 miFog/Mist54°F51°F94%1021.3 hPa
Novato / Gnoss Field, CA22 mi19 minSSE 59.00 miA Few Clouds54°F51°F94%1021.3 hPa

Wind History from STS (wind in knots)
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Last 24hrN4NW4N3N6NW5CalmNW3CalmNW4CalmNW3NW4NW4NW5N3N4N4N3NW5N4N4CalmNE4Calm
1 day agoNW6CalmW5NW4N4CalmCalmCalmNW3CalmCalmW4S4CalmCalmSW4SE3S3CalmW4CalmN5CalmN3
2 days agoW5NW4NW5NW6NW6NW4N3NW3NW43CalmW3W3W3W3CalmCalmCalmNW3N5CalmCalmNW3N5

Tide / Current Tables for Bodega Harbor entrance, California
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Bodega Harbor entrance
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Tue -- 01:17 AM PST     4.38 feet High Tide
Tue -- 06:15 AM PST     3.08 feet Low Tide
Tue -- 07:00 AM PST     Sunrise
Tue -- 09:37 AM PST     Moonrise
Tue -- 11:46 AM PST     5.35 feet High Tide
Tue -- 04:55 PM PST     Sunset
Tue -- 06:55 PM PST     -0.14 feet Low Tide
Tue -- 07:42 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
44.44.343.63.33.13.23.64.14.85.25.354.23.11.90.80.1-0.10.20.91.82.7

Tide / Current Tables for Tomales Bay entrance, California
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Tomales Bay Entrance
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Tue -- 01:48 AM PST     3.92 feet High Tide
Tue -- 06:33 AM PST     2.75 feet Low Tide
Tue -- 06:59 AM PST     Sunrise
Tue -- 09:36 AM PST     Moonrise
Tue -- 12:09 PM PST     4.92 feet High Tide
Tue -- 04:55 PM PST     Sunset
Tue -- 07:37 PM PST     -0.20 feet Low Tide
Tue -- 07:42 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.33.83.93.73.432.82.833.54.14.74.94.84.23.32.21.20.4-0.1-0.20.211.9

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 (5,6,7,8)
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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.