Thursday, March23, 2017 L-36.com


Marine Weather and Tides
Mountain Gate, 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 7:04AMSunset 7:27PM Thursday March 23, 2017 9:13 AM PDT (16:13 UTC) Moonrise 3:31AMMoonset 1:55PM Illumination 16% Phase: Waning Crescent; Moon at 26 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 San Francisco Bay North Of The Bay Bridge- 827 Am Pdt Thu Mar 23 2017
.small craft advisory in effect from late tonight through Friday evening...
Today..W winds 5 to 15 kt.
Tonight..S winds 5 to 15 kt. Slight chance of rain in the evening, then chance of rain after midnight.
Fri..SE winds 15 to 25 kt. Rain.
Fri night..SE winds 10 to 20 kt. Rain likely in the evening, then slight chance of showers after midnight.
Sat..N winds 10 kt...becoming west.
Sun..SW winds 10 kt. Chance of showers, then showers likely.
Mon..W winds 10 kt. Slight chance of showers.
PZZ500 827 Am Pdt Thu Mar 23 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... As a storm system approaches from the west, winds will increase and become southerly this afternoon. Gusts to gale force possible at times late tonight and into tomorrow...especially for the northern coastal waters. Rough seas possible ahead of and just behind Friday's system, but should decrease by Saturday morning. Northwest winds will return by Saturday morning before briefly switching to southerly on Sunday as another weak system moves in.

7 Day Forecast for Marine Location Near Alameda, CA
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location: 37.77, -122.34     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 231143
afdmtr
area forecast discussion
national weather service san francisco bay area
443 am pdt Thu mar 23 2017

Synopsis Mild and dry conditions are anticipated today as high
pressure briefly builds in over the state. Rain and moderately
south winds return to the north bay area late tonight as a
frontal system approaches. Rain and winds will spread southward
Friday as the front moves across the region. A break in the rain
is expected Saturday with rain anticipated to return to the
district as early as Sunday afternoon and persist into Monday
as a low pressure system moves through the region.

Discussion As of 3:00 am pdt Thursday... Doppler radar continues
to pick up a couple stray showers here and there but showers have
wound down considerably overnight. Mild and dry conditions await
the region today as the area transitions between storms. High
pressure will briefly build in over the state this morning
resulting in mostly sunny/clear skies and seasonable highs in the
lower to mid 60s. Temperatures along the coast will likely only
see a degree or two of warming while inland temperatures warm
anywhere from 3 to 5 degrees with southernmost inland valley
seeing the most warming.

The forecast remains on course with models solutions remaining
fairly consistent with regard to storm track and intensity for
the next storm system heading our way. Rain chances will begin
tonight over the north bay then will slide south overnight into
Friday as the frontal system moves across the region. The bulk of
the rain will move through the bay area during the day Friday
making for a wet morning and afternoon commute. Precipitable water
values are forecast around 1" to 1.25" with this system. This
will translate into rain totals around 1.5" to 3" in the north
bay and 2/3" to 1.5" across the bay area. Areas from the monterey
bay south will see a slight delay in the rain with the main band
of rain moving through Friday afternoon/evening. Accumulations of
less than 2/3" are expected. Coastal mountain will see the
highest rain totals as orographic coupled with a perturbation
along the front enhances the rainfall amounts as the system slides
south. Coastal mountains as well as the mountain of the north bay
may see rainfall totals in anywhere from 3" to 4+".

Gusty southerly winds are also anticipated to accompany this
system with speeds of 25 to 35 mph anticipated. High gusts
possible over elevated terrain. A wind advisories is not expected
at this time but will be monitored closely.

As the system slides south Friday evening the north bay region
will begin to see drier conditions with clearing expected
overnight. Cool and drier weather is forecast for Saturday as high
pressure over the eastern pacific ridges north and east across
the state. This drying trend will be short-lived as the next
system approaches from the west on Sunday spreading rain across
the district Sunday afternoon into Monday. Precipitable water
values for this system are forecast around 1"... Slightly less than
Friday's system. Therefore accumulations totals will not be as
high with this storm.

Long range models remain in agreement with bringing in a large
ridge of high pressure over the eastern pacific that will drive
the storm track to the north. If this solution holds the region
may be in for an extended period of dry weather.

Aviation As of 04:35 am pdt Thursday... For 12z tafs. Patchy
MVFR CIGS possible through 16z, especially for south bay and
monterey bay terminals. OtherwiseVFR through this evening for the
majority of the area. Could see MVFR CIGS by early Friday morning
for bay area terminals. Winds generally from the wsw and could be
breezy by this afternoon, 10-15 kt. Showers return as early as
04z Friday for ksts, with steady rain expected after midnight
Friday morning for all terminals. Confidence is low on exact
timing of rain.

Vicinity of ksfo... MainlyVFR. Cannot rule out brief periods of
MVFR from low level clouds through 16z. Sw/wsw winds 10-15 kt
this afternoon. Rain and lower CIGS return early Friday morning.

Sfo bridge approach... Same as ksfo.

Monterey bay terminals... Patchy MVFR possible through 16z, then
vfr. W/wsw winds 10-12 kt this afternoon. Rain not likely until
after 12z Friday, but a shower or two before is still possible.

Marine As of 04:17 am pdt Thursday... Winds will become
southerly and increase this afternoon ahead of another storm
system. Wind gusts may reach gale force at times late tonight and
into Friday, especially for the northern coastal waters. Seas will be
rough ahead of and just behind the storm system on Friday, but
should decrease by Saturday morning. Winds will switch back to
the northwest by Saturday morning. Another weak storm system is
expected Sunday and may briefly switch winds out of the south.

However, winds will quickly turn back to the northwest by Monday
morning.

Mtr watches/warnings/advisories
Tday Gla... Pt arena to pigeon pt 10-60 nm from 9 am
sca... Pt pinos to pt piedras blancas 0-10 nm until 9 am
sca... Pt arena to pt reyes 0-10 nm from 3 pm
public forecast: cw
aviation/marine: bam
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
OBXC1 2 mi44 min 52°F 45°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 2 mi44 min SE 4.1 G 5.1
AAMC1 - 9414750 - Alameda, CA 2 mi44 min ESE 1 G 2.9 53°F 59°F1023 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 3 mi44 min SE 4.1 G 5.1 52°F 1022.6 hPa
PXSC1 4 mi44 min 53°F 40°F
LNDC1 4 mi44 min E 2.9 G 5.1 50°F 1022.4 hPa
FTPC1 - 9414290 - San Francisco, CA 7 mi44 min W 6 G 8 52°F 56°F1022.9 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 9 mi44 min Calm G 1.9 54°F 1022.9 hPa
RCMC1 - 9414863 - Richmond, CA 11 mi44 min NW 6 G 7 52°F 57°F1022.4 hPa
46237 - San Francisco Bar, CA (142) 16 mi44 min 55°F7 ft
RTYC1 - 9414523 - Redwood City, CA 19 mi44 min WSW 2.9 G 4.1 52°F 59°F1022.2 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 20 mi44 min NW 1 G 1.9 51°F 1022.4 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 22 mi44 min W 6 G 8 49°F 58°F1022.7 hPa47°F
UPBC1 22 mi44 min W 6 G 8.9
PCOC1 - 9415144 - Port Chicago, CA 25 mi44 min SSW 4.1 G 8.9 49°F 57°F1022.3 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 26 mi84 min NW 14 G 18 53°F 55°F8 ft1021.9 hPa (+1.2)
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 30 mi44 min WNW 6 G 8 51°F 1022.1 hPa
SFXC1 - San Francisco Bay Reserve, CA 34 mi89 min WNW 4.1 44°F 1021 hPa43°F
PRYC1 - 9415020 - Point Reyes, CA 37 mi44 min NW 13 G 15 53°F 54°F1022.3 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 40 mi84 min NW 9.7 G 14 53°F 55°F10 ft1022.1 hPa (+1.2)

Wind History for Oakland Middle Harbor, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Redding Municipal Airport, CA18 mi21 minN 00.75 miFog/Mist42°F42°F100%1021.4 hPa

Wind History from OAK (wind in knots)
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Last 24hrW7NW7W7W11W15W18W18W19W18W20W19W17W14W10W16NW8NW8NW7N3NW4CalmCalmCalmCalm
1 day agoW11W11SW6SW13SW14SW12SW12SW13SW14SW15SW15S14S11
G20
S9S16S13SW16S9SE5NE3W10W12W10NW8
2 days agoSE14
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Tide / Current Tables for Oakland Pier, San Francisco Bay, California
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Oakland Pier
Click for Map
Thu -- 03:40 AM PDT     2.64 feet Low Tide
Thu -- 04:24 AM PDT     Moonrise
Thu -- 07:07 AM PDT     Sunrise
Thu -- 09:09 AM PDT     5.32 feet High Tide
Thu -- 03:00 PM PDT     Moonset
Thu -- 04:05 PM PDT     0.28 feet Low Tide
Thu -- 07:24 PM PDT     Sunset
Thu -- 10:58 PM PDT     4.86 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.23.63.12.72.733.64.455.35.24.53.52.41.30.60.30.51.1233.94.64.9

Tide / Current Tables for Potrero Point 1.1 mi E, South San Francisco Bay, California Current
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Potrero Point 1.1 mi E
Click for Map
Thu -- 12:54 AM PDT     -1.00 knots Max Ebb
Thu -- 04:13 AM PDT     0.00 knots Slack
Thu -- 04:24 AM PDT     Moonrise
Thu -- 07:07 AM PDT     Sunrise
Thu -- 07:11 AM PDT     1.28 knots Max Flood
Thu -- 09:57 AM PDT     -0.00 knots Slack
Thu -- 01:05 PM PDT     -1.87 knots Max Ebb
Thu -- 03:00 PM PDT     Moonset
Thu -- 04:49 PM PDT     0.00 knots Slack
Thu -- 07:24 PM PDT     Sunset
Thu -- 08:08 PM PDT     1.91 knots Max Flood
Thu -- 11:14 PM PDT     -0.01 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.9-1-0.9-0.6-0.10.51.11.31.20.8-0-0.9-1.6-1.9-1.7-1.3-0.70.21.11.71.91.81.20.2

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 (12,3,4,5)
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Ground Weather Radar Station San Francisco Bay Area, 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.