Thursday, March23, 2017 L-36.com


Marine Weather and Tides
Newark, 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 7:25PM Thursday March 23, 2017 7:11 PM PDT (02:11 UTC) Moonrise 3:23AMMoonset 2:00PM Illumination 13% 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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PZZ531 San Francisco Bay South Of The Bay Bridge- 220 Pm Pdt Thu Mar 23 2017
.small craft advisory in effect from late tonight through Friday afternoon...
Tonight..SW winds 10 kt...becoming southeast after midnight. Chance of rain after midnight.
Fri..SE winds 15 to 25 kt. Rain.
Fri night..NW winds 10 kt. Rain in the evening, then slight chance of showers after midnight.
Sat..NW winds 10 kt.
Sat night..NW winds 5 to 15 kt.
Sun..W winds 5 kt...becoming south 5 to 15 kt. Chance of showers, then showers likely.
Mon..NW winds 10 to 20 kt. Slight chance of showers.
Tue..W winds 10 kt.
PZZ500 220 Pm 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... A storm system is currently approaching the waters from the west. This will cause winds to increase and turn southerly late this afternoon. Occasional gale force gusts are possible late tonight and into tomorrow...especially for the northern coastal waters. Rough seas possible just ahead of and behind the frontal passage, but should begin to decrease by Saturday. Expect northwest winds to return by Saturday as well before briefly becoming southerly on Sunday as another weak system moves over the waters.

7 Day Forecast for Marine Location Near Newark, CA
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location: 37.47, -122.07     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 240004
afdmtr
area forecast discussion
national weather service san francisco bay area
504 pm pdt Thu mar 23 2017

Rain and gusty southerly winds return on Friday...

Synopsis 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 showers
anticipated to return Sunday night into Monday as a low pressure
system moves through the region.

Discussion As of 1:40 pm pdt Thursday... After an active
weather day yesterday, today -- as expected -- has been tranquil
with just scattered clouds. Temperatures have been running close
to values from Tuesday with most spots in the upper 50s to the
lower 60s. Hard to believe in less than 24 hours we will be
dealing with another round of active weather.

Synoptically a cold front associated with a 988 mb low heading
toward british columbia will move through our region on Friday.

Models have shown very little variation from previous runs, so the
forecast was changed very little during the shift. Rain will move
north-to-south starting overnight in the north bay then down to
the sf bay area early in the morning and to monterey bay region
close to noon. Rain rates will pick up with the approaching front
and could be moderate to heavy at times. Current timing brings the
main band through sf bay late in the morning or early in the
afternoon. In fact, if the current NAM verifies the bulk of the
rain will fall after morning rush and before the afternoon
commute. Along with the rain southerly winds will increase with
many spots forecast to see gusts of 25 to 35 mph. Winds for higher
elevation locations will be stronger -- gusts over 45 mph are
likely.

Rainfall totals still look like 1.5" to 3" for the north bay with
2/3" to 1.5" around sf bay with generally less than 2/3" for
points to the south. All of the coastal ranges are expected to be
in the 2-4" range with a few local spots possibly seeing slightly
higher amounts.

Rain will switch to showers behind the front with light
precipitation possible through Friday night. However, by mid-day
Saturday all of the rain should be well to our south and east.

Similar to today's time period, that break will be short as
another system moves across on Sunday. This one should be quite a
bit weaker and will have less moisture to utilize. In general
amounts will be around half of what we get out of the first round.

Rain will switch over to showers going into Monday.

A ridge of high pressure will build back to our region starting
next Tuesday, although a system will dive down from the north late
Wednesday/early Thursday possibly bringing a few light showers.

However, after it departs a more pronounced pattern change will
take place as a stronger ridge of high pressure returns to our
region. This should give us dry conditions with warmer
temperatures toward the end of next week possibly through the
following week.

Aviation As of 4:55 pm pdt Thursday... For 00z tafs.VFR
conditions expected to prevail through the evening hours with
westerly winds at 10-15 kt. Showers expected to move in from north
to south beginning with ksts around 04z Friday. Steady rain
expected across all terminals by tomorrow morning. MVFR ceilings
possible early Friday morning for bay area terminals. Low
confidence on timing of the rain.

Winds are expected become southerly on Friday with possible gusts
exceeding 20 to 25 kt by 18z. High confidence on wind direction,
low confidence on the timing and gust magnitude.

Vicinity of ksfo...VFR this evening and overnight transitioning to
MVFR ceilings and rain by Friday morning. West winds 10-15 kt this
evening becoming southerly by 6 to 8z with gusts exceeding 20 kt
possible by 15 to 18z.

Sfo bridge approach... Same as ksfo.

Monterey bay terminals...VFR this evening and overnight with
generally light winds and occasional gusts at ksns before sunset.

Rain showers are expected to begin impacting after 12 to 16z.

Marine As of 04:42 pm pdt Thursday... A storm system is
currently approaching the waters from the west. This will cause
winds to increase and turn southerly late this afternoon.

Occasional gale force gusts are possible late tonight and into
tomorrow... Especially for the northern coastal waters. Rough seas
possible just ahead of and behind the frontal passage, but should
begin to decrease by Saturday. Expect northwest winds to return
by Saturday as well before briefly becoming southerly on Sunday
as another weak system moves over the waters.

Mtr watches/warnings/advisories
Tngt Sca... Pigeon pt to pt pinos 0-10 nm from 5 am
sca... Pt pinos to pt piedras blancas 0-10 nm from 5 am
sca... Pt arena to pigeon pt 10-60 nm
sca... Pt reyes to pigeon pt 0-10 nm from 9 pm
sca... Pigeon pt to pt piedras blancas 10-60 nm from 9 pm
sca... Pt arena to pt reyes 0-10 nm from 8 pm
sca... Sf bay from 5 am
public forecast: bell
aviation: rowe
marine: anna
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 8 mi41 min W 9.9 G 12 55°F 61°F1023 hPa
AAMC1 - 9414750 - Alameda, CA 24 mi41 min W 6 G 8.9 55°F 61°F1024 hPa
LNDC1 25 mi41 min W 5.1 G 11 55°F 1023.6 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 27 mi47 min WNW 6 G 9.9 55°F 1023.6 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 27 mi41 min WSW 9.9 G 13
OBXC1 27 mi41 min 55°F 45°F
PXSC1 29 mi41 min 55°F 44°F
FTPC1 - 9414290 - San Francisco, CA 31 mi41 min SW 4.1 G 8 54°F 57°F1023.6 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 34 mi41 min WSW 7 G 9.9 55°F 1023.6 hPa
RCMC1 - 9414863 - Richmond, CA 36 mi41 min W 5.1 G 8.9 54°F 58°F1023.1 hPa
46237 - San Francisco Bar, CA (142) 37 mi41 min 57°F7 ft
MZXC1 - 9415102 - Martinez-Amorco CA 39 mi41 min WSW 12 G 14 55°F 59°F1023.4 hPa46°F
UPBC1 39 mi41 min W 14 G 20
PCOC1 - 9415144 - Port Chicago, CA 41 mi41 min WSW 13 G 16 55°F 60°F1023 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 41 mi41 min WNW 11 G 17 57°F 1022.8 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 42 mi41 min W 8.9 G 13 55°F 1023 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 44 mi81 min SW 7.8 G 7.8 55°F 56°F7 ft1023.3 hPa (+0.0)
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 45 mi81 min SW 5.8 G 5.8 54°F 56°F6 ft1023.8 hPa (+0.0)

Wind History for Redwood City, CA
(wind in knots)    EDIT      (on/off)   Help
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G13

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Mountain View, Moffett Field, CA3 mi75 minNW 610.00 miFair59°F42°F54%1023.3 hPa
Palo Alto Airport, CA3 mi19 minSW 710.00 miMostly Cloudy57°F41°F55%1023.4 hPa
San Jose, San Jose International Airport, CA10 mi18 minNNW 1210.00 miMostly Cloudy57°F43°F60%1023.1 hPa
San Carlos Airport, CA10 mi24 minWSW 510.00 miOvercast55°F42°F63%1023.4 hPa
Hayward, Hayward Air Terminal, CA13 mi17 minWNW 710.00 miFair56°F41°F57%1024.4 hPa
San Jose / Reid / Hillv, CA16 mi24 minNW 1010.00 miA Few Clouds57°F44°F63%1024 hPa
Oakland, Metro Oakland International Airport, CA18 mi18 minW 710.00 miOvercast57°F45°F64%1023.4 hPa
San Francisco, San Francisco International Airport, CA19 mi15 minSW 710.00 miMostly Cloudy55°F43°F64%1023.2 hPa
Livermore, Livermore Municipal Airport, CA21 mi18 minW 810.00 miFair53°F39°F61%1023 hPa
Half Moon Bay Airport, CA23 mi16 minSSW 48.00 miOvercast54°F44°F72%1023.7 hPa

Wind History from PAO (wind in knots)
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Last 24hrW15W10------------------444NW5Calm--N10N10N11N12N15SW12SW7
1 day agoS10S6------------------S5CalmW8W10NW10NW9NW12NW13NW13NW15NW12W17W17
2 days agoSE14SE12------------------S8SE10W55--SW15SW15SW15SW15SW12SW15
G23
SW10SW10

Tide / Current Tables for Calaveras Point, west of, San Francisco Bay, California
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Calaveras Point
Click for Map
Thu -- 04:22 AM PDT     Moonrise
Thu -- 04:41 AM PDT     2.74 feet Low Tide
Thu -- 07:06 AM PDT     Sunrise
Thu -- 09:41 AM PDT     7.92 feet High Tide
Thu -- 03:00 PM PDT     Moonset
Thu -- 05:06 PM PDT     0.38 feet Low Tide
Thu -- 07:23 PM PDT     Sunset
Thu -- 11:30 PM PDT     7.46 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.85.94.73.62.92.83.54.96.57.67.97.46.34.83.21.70.80.40.71.83.456.57.3

Tide / Current Tables for Dumbarton Point 2.3 mi NE, South San Francisco Bay, California Current
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Dumbarton Point 2.3 mi NE
Click for Map
Thu -- 02:34 AM PDT     -0.60 knots Max Ebb
Thu -- 04:22 AM PDT     Moonrise
Thu -- 04:58 AM PDT     0.00 knots Slack
Thu -- 07:06 AM PDT     Sunrise
Thu -- 07:24 AM PDT     0.86 knots Max Flood
Thu -- 10:13 AM PDT     -0.00 knots Slack
Thu -- 02:45 PM PDT     -1.12 knots Max Ebb
Thu -- 03:00 PM PDT     Moonset
Thu -- 05:34 PM PDT     0.00 knots Slack
Thu -- 07:23 PM PDT     Sunset
Thu -- 08:21 PM PDT     1.27 knots Max Flood
Thu -- 11:30 PM PDT     -0.01 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.3-0.5-0.6-0.6-0.400.50.80.80.60.1-0.3-0.6-0.9-1.1-1.1-0.9-0.40.311.31.20.90.3

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 (22,6,7,8)
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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.