Wednesday, March29, 2017

Marine Weather and Tides
Bloomfield, CA

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:56AMSunset 7:33PM Wednesday March 29, 2017 10:10 AM PDT (17:10 UTC) Moonrise 7:17AMMoonset 8:39PM Illumination 5% Phase: Waxing Crescent; Moon at 2 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- 855 Am Pdt Wed Mar 29 2017
.small craft advisory in effect through late Thursday night...
Today..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 8 to 10 ft at 16 seconds.
Tonight..NW winds 10 to 20 kt. Wind waves 2 to 4 ft. W swell 8 to 10 ft at 15 seconds. Slight chance of showers after midnight.
Thu..NW winds 15 to 25 kt. Wind waves 4 to 6 ft. W swell 8 to 10 ft at 14 seconds.
Thu night..NW winds 20 to 30 kt with occasional gusts to 45 kt. Wind waves 4 to 6 ft. NW swell 9 to 11 ft at 14 seconds.
Fri..NW winds 20 to 30 kt. Wind waves 4 to 6 ft. NW swell 9 to 12 ft at 12 seconds.
Sat..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 9 to 12 ft.
Sun..NW winds 25 to 35 kt. Combined seas 13 to 17 ft.
PZZ500 855 Am Pdt Wed Mar 29 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... High pressure off the california coast will keep moderate northwest winds through the day. Winds will briefly decrease tonight as the high weakens but will increase again Thursday through Friday as strong low pressure develops over the intermountain region.

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 291151
area forecast discussion
national weather service san francisco bay area
451 am pdt Wed mar 29 2017

Synopsis A gradual warming trend will continue through
today as high pressure builds over the region. Cooler and breezy
conditions return on Thursday as a cold front sweeps through the
region. While a few light rain showers will be possible, most
locations will remain dry. The ridge will then rebuild back over
the region late in the week resulting in another warming trend
heading into the upcoming weekend.

Discussion As of 3:10 am pdt Wednesday... All signs point to
beautiful weather across our entire CWA today. Synoptically a
ridge of high pressure aloft will combine with warmer temperatures
at 925 mb and offshore flow at the surface to bring widespread
60s and 70s to the coast with 70s to lower 80s for inland
locations. Sunny conditions can also be expected along with
lighter winds than yesterday.

A system in the north pacific will dive to the southeast over the
next couple of days and move to eastern california/nevada on
Thursday. Showers associated with this feature will generally stay
to our east although a few sprinkles may occur especially over
the north and east bay hills. At the same time cooler air will
filter back in along with increasing gradients both at the surface
and aloft. Northwesterly winds will be on the increase through
the day with many spots forecast to see gusts over 25 mph. Coastal
locations should see the stronger winds with local gusts over 40
mph possible. Will allow the day crew to make the final call on
possible wind advisory. Temperatures will be considerably cooler
than today -- most spots will be 7 to 12 degrees lower.

The ridge of high pressure will quickly rebuild back into our
region starting on Friday and continue into the weekend. By
Saturday highs will be back to levels close to what we will see

Another system will pass to our east by the end of the weekend
which will lead to temperatures being knocked down again going
into next work week. That will be followed by the ridge rebuilding
once again.

Finally, interesting to note that guidance continues to show a
return to wet weather starting around next Thursday as a system
moves in from the northwest that will have a moderate moisture tap
to use. Current ivt values favor around 250 kg/m/s although some
of the ensemble members have values over 500. Both the GFS and
ecmwf have widespread rainfall by next Friday. Still more than a
week down the road, however this potential change in the pattern
has been hinted at for quite a few days.

Aviation As of 4:50 am for the 12z tafs. High confidence that
vfr conditions will prevail for through at least 3z Thursday with
w to NW winds. Later in the forecast period, expecting low clouds
to develop and move onshore with drizzle or light rain between 8z
and 15z Thursday at san francisco bay area terminals. ExpectVFR
conditions to transition to MVFR and possible ifr ceilings as a
result. Confidence is low to medium after 3z Thursday.

Vicinity of ksfo...VFR on Wednesday, becoming MVFR/ifr after 8z
Thursday with light rain or drizzle developing. Westerly winds
with gusts approaching 20 to 25 kt on Wednesday afternoon.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR on Wednesday with W to NW winds,
becoming MVFR or possibly ifr with low ceilings after 6 to 9z

Marine As of 04:31 am pdt Wednesday... Moderate and gusty
northwest winds will persist over the central california coastal
waters through the day with increasing winds possible over the
bays by the evening hours. A weak frontal system will push
through the area early Thursday, bringing with it the next chance
of showers. High pressure will build later this week with
increasing northwest winds approaching gale force by Thursday and

Mtr watches/warnings/advisories
Tday 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 until 3 pm
sca... Pigeon pt to pt piedras blancas 10-60 nm until 3 pm
sca... Rough bar advisory for sf bar
sca... Mry bay from 3 pm
sca... Sf bay from 3 pm
public forecast: bell
aviation: rowe
marine: rowe
visit us at

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 mi31 min NW 23 G 29 55°F 55°F1023 hPa51°F
RCMC1 - 9414863 - Richmond, CA 38 mi53 min Calm G 1.9 58°F 57°F1022 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 38 mi53 min WNW 4.1 G 5.1 58°F 1022 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 41 mi53 min SSW 1.9 G 4.1 59°F 1022.5 hPa
46237 - San Francisco Bar, CA (142) 41 mi71 min 57°F8 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 42 mi81 min NNW 14 G 18 54°F 53°F9 ft1022.3 hPa (+0.9)
46214 - Point Reyes, CA (029) 43 mi49 min 55°F10 ft
FTPC1 - 9414290 - San Francisco, CA 44 mi53 min NNW 1 G 1.9 58°F 58°F1022.5 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 45 mi53 min WNW 4.1 G 6 58°F 57°F1022.2 hPa48°F
UPBC1 45 mi53 min WNW 5.1 G 7
PXSC1 46 mi53 min 58°F 53°F
SFXC1 - San Francisco Bay Reserve, CA 46 mi86 min W 2.9 59°F 1021 hPa49°F
OBXC1 47 mi53 min 57°F 52°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 47 mi53 min S 4.1 G 6 58°F 1022.3 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 48 mi53 min S 4.1 G 5.1
PCOC1 - 9415144 - Port Chicago, CA 48 mi53 min WSW 8 G 9.9 59°F 56°F1021.6 hPa

Wind History for Point Reyes, CA
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1 day
2 days

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Santa Rosa, Santa Rosa Sonoma County Airport, CA11 mi18 minN 010.00 miPartly Cloudy61°F44°F54%1021.2 hPa
Novato / Gnoss Field, CA22 mi36 minN 010.00 miFair59°F44°F59%1022.3 hPa

Wind History from STS (wind in knots)
Last 24hrN14NW13NW13NW12
1 day agoN12
2 days agoS7S6S5S8S7S13S6S8SE7S5W83W6W6CalmW3W5N3CalmSW5W3E5SE3SE4

Tide / Current Tables for Bodega Harbor entrance, California
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Bodega Harbor entrance
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Wed -- 12:25 AM PDT     5.75 feet High Tide
Wed -- 06:46 AM PDT     0.10 feet Low Tide
Wed -- 07:01 AM PDT     Sunrise
Wed -- 08:17 AM PDT     Moonrise
Wed -- 01:02 PM PDT     5.22 feet High Tide
Wed -- 06:55 PM PDT     0.91 feet Low Tide
Wed -- 07:33 PM PDT     Sunset
Wed -- 09:39 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Tide / Current Tables for Tomales Bay entrance, California
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Tomales Bay Entrance
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Wed -- 12:52 AM PDT     5.10 feet High Tide
Wed -- 07:00 AM PDT     Sunrise
Wed -- 07:19 AM PDT     -0.05 feet Low Tide
Wed -- 08:17 AM PDT     Moonrise
Wed -- 01:24 PM PDT     4.56 feet High Tide
Wed -- 07:22 PM PDT     0.60 feet Low Tide
Wed -- 07:32 PM PDT     Sunset
Wed -- 09:39 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Weather Map and Satellite Images
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Weather Map
IR Satellite Image from GEOS

GOES Local Image of CentralWestCoast    EDIT

Wind Forecast for San Francisco/Monterey Bay Area, CA (13,3,4,5)
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Ground Weather Radar Station Sacramento, CA
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weather_mapweather_map weather_map

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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 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 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.