Tuesday, March28, 2017 L-36.com


Marine Weather and Tides
Belmont, 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 6:57AMSunset 7:30PM Tuesday March 28, 2017 2:34 PM PDT (21:34 UTC) Moonrise 6:36AMMoonset 7:26PM Illumination 2% Phase: Waxing Crescent; Moon at 1 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- 224 Pm Pdt Tue Mar 28 2017
Tonight..NW winds 10 to 20 kt...becoming west 10 kt after midnight.
Wed..W winds 5 to 15 kt.
Wed night..W winds 15 to 25 kt...decreasing to 5 to 15 kt after midnight.
Thu..NW winds 5 to 15 kt. Slight chance of showers in the morning.
Thu night..NW winds 15 to 25 kt.
Fri..NW winds 15 to 25 kt.
Sat..W winds 10 kt.
Sun..NW winds 5 to 15 kt.
PZZ500 224 Pm Pdt Tue Mar 28 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Moderate and gusty northwest winds will continue through the next several days as high pressure strengthens over the eastern pacific and tightens the pressure gradient along the central coast of california. Northwest swell will slowly decrease some tonight and will continue to through about Thursday morning before building again late Thursday and through the weekend.

7 Day Forecast for Marine Location Near Belmont, CA
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location: 37.52, -122.28     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 281746
afdmtr
area forecast discussion
national weather service san francisco bay area
1046 am pdt Tue mar 28 2017

Synopsis A ridge of high pressure will build into our region
and provide warmer weather the next couple of days. At the same
time locally breezy northwesterly winds will continue. Cooler
conditions are likely on Thursday as a system moves through
northern california. The ridge will rebuild by the end of the
week leading to another increase in temperatures.

Discussion As of 08:25 am pdt Tuesday... Quiet weather
conditions prevail over the region this morning as high pressure
builds over the eastern pacific. Aside from a slight increase in
high level clouds, mostly sunny conditions will prevail today
across the region along with warmer temperatures. The ongoing
forecast remains on track and no updates are needed at this time.

Prev discussion As of 3:00 am pdt Tuesday... Although temperatures
will be warmer today as a ridge of high pressure builds into our
region, it won't feel very warm as breezy northwesterly conditions
can be expected from later this morning to the evening. In fact,
surface gradients are still impressive at this hour with sfo-acv
at 5.5 mb. Winds of 15 to 25 mph can be expected in most spots
with local gusts over 30 mph likely. Temperatures will generally
be in the 60s to lower 70s at the coast with 70s inland.

Temperatures will see another 3 to 5 degree increase in most spots
for Wednesday as 925 mb values increase another 2c.

On Thursday an inside slider will move from northern california
down into nevada. Due to the track virtually all of the showers
should stay to our north and east. However, models do keep the
outside shot of light rain hitting higher elevation locations.

Kept a few mentions of pops around 20% for those spots. Bigger
impact will be another round of breezy conditions followed by
cooler temperatures. Highs will drop back into the upper 50s to
the upper 60s.

The ridge will rebuild and move back to our region starting on
Friday and continuing into the weekend. Some disagreement between
the models as far as how much warming will occur. ECMWF is running
3 to 7 degree warmer than the gfs. Based on its better
verification, the forecast was nudged toward the higher values.

Longer range guidance favors dry conditions through at least the
middle of next week. Some signs after that we will flip back to a
wetter pattern.

Aviation As of 10:33 am pdt Tuesday for 18z tafs. Current vsbl
satellite imagery shows few-sct high clouds over the region.

Expect this to be the case through the day. Biggest story will be
the winds today. West/northwest winds will pick up and become
gusty in the next hour or two. Winds won't be quite as gusty today
as yesterday, but will still gust 20-25 kt, locally higher,
through roughly about 03z (8pm pdt) at most terminals. Threw in a
chance of low clouds for the monterey bay terminals for Wednesday
morning. There could be a couple of hours of stratus around
sunrise, but confidence is low at this time. Overall, moderate to
high confidence with this forecast.

Vicinity of ksfo...VFR conditions anticipated. West to northwest
winds exceeding 20 to 25 kt possible through the evening, possibly
higher at ksfo.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR through the rest of the day. Tafs
reflect MVFR CIGS around sunrise Wednesday morning, but should
lift by 16z, if CIGS develop at all. Gusty west/northwest winds
by 21z (2pm pdt) this afternoon, around 20 kt, diminishing around
03z.

Marine As of 08:25 am pdt Tuesday... A long period northwest
swell... 17 to 18 seconds... Will move through the coastal waters
today. Moderate and gusty northwest winds will continue for the
next several days as a strong surface pressure gradient builds
over the region.

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
sca... Pigeon pt to pt piedras blancas 10-60 nm
sca... Rough bar advisory for sf bar
sca... Mry bay from 1 pm
public forecast: rgass
aviation/marine: bm
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 4 mi46 min NW 13 G 15 67°F 60°F1021.9 hPa
AAMC1 - 9414750 - Alameda, CA 17 mi46 min W 7 G 12 68°F 58°F1022.4 hPa
LNDC1 19 mi112 min NNW 8 G 12 65°F 1022.7 hPa
OKXC1 - 9414776 - Oakland (Berth 34), CA 20 mi46 min NW 8.9 G 11 65°F 1022.2 hPa
OBXC1 20 mi46 min 64°F 47°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 20 mi46 min WNW 8.9 G 12
PXSC1 21 mi46 min 68°F 41°F
FTPC1 - 9414290 - San Francisco, CA 22 mi52 min WSW 12 G 16 60°F 56°F1022.6 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 27 mi46 min NNW 12 G 21 72°F 1022.3 hPa
RCMC1 - 9414863 - Richmond, CA 29 mi52 min NNW 8 G 9.9 66°F 57°F1021.9 hPa
UPBC1 37 mi46 min N 17 G 20
MZXC1 - 9415102 - Martinez-Amorco CA 37 mi46 min N 9.9 G 14 70°F 56°F1022 hPa36°F
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 37 mi46 min WNW 9.9 G 25 67°F 1021.7 hPa
PCOC1 - 9415144 - Port Chicago, CA 39 mi46 min N 15 G 16 68°F 57°F1021.6 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 42 mi46 min NNE 14 G 18 67°F 1021.7 hPa
SFXC1 - San Francisco Bay Reserve, CA 49 mi109 min N 11 73°F 1022 hPa38°F

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Carlos Airport, CA2 mi47 minWNW 13 G 1710.00 miClear70°F41°F35%1022.3 hPa
San Francisco, San Francisco International Airport, CA8 mi38 minWNW 19 G 2610.00 miA Few Clouds and Breezy65°F48°F54%1022.3 hPa
Palo Alto Airport, CA9 mi47 minWNW 1510.00 miClear70°F44°F40%1022.3 hPa
Half Moon Bay Airport, CA12 mi39 minN 15 G 225.00 miFair with Haze59°F50°F72%1023.4 hPa
Hayward, Hayward Air Terminal, CA13 mi40 minWSW 810.00 miFair68°F46°F45%1022.9 hPa
Oakland, Metro Oakland International Airport, CA13 mi41 minWNW 1310.00 miA Few Clouds72°F45°F38%1021.8 hPa
Mountain View, Moffett Field, CA14 mi38 minNNW 11 G 1910.00 miFair69°F42°F38%1022.5 hPa
San Jose, San Jose International Airport, CA21 mi41 minWNW 1310.00 miPartly Cloudy68°F44°F42%1021.9 hPa

Wind History from SQL (wind in knots)
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Last 24hrW15
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NW5W3NW5W4CalmW3CalmCalmW3CalmNW4CalmNW7NW7
G17
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1 day agoNE4SW7S8S8SW10
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SW13S7W8NW6W7W5W5W4W3W3W4W4NW4W8NW9NW12NW11
G17
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2 days agoN9NW9NW7W10W9W8W5NW4W4W4SW3SW3S3CalmCalmCalmCalm43445E7NE6

Tide / Current Tables for Smith Slough, San Francisco Bay, California
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Smith Slough
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Tue -- 01:44 AM PDT     7.84 feet High Tide
Tue -- 06:59 AM PDT     Sunrise
Tue -- 07:36 AM PDT     Moonrise
Tue -- 08:15 AM PDT     0.39 feet Low Tide
Tue -- 02:02 PM PDT     7.72 feet High Tide
Tue -- 07:28 PM PDT     Sunset
Tue -- 08:25 PM PDT     Moonset
Tue -- 08:28 PM PDT     0.43 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.27.57.87.25.94.12.310.40.723.85.67.17.77.46.24.62.81.30.50.61.73.5

Tide / Current Tables for San Mateo Bridge, South San Francisco Bay, California Current
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San Mateo Bridge
Click for Map
Tue -- 02:15 AM PDT     -0.00 knots Slack
Tue -- 05:26 AM PDT     -1.82 knots Max Ebb
Tue -- 06:59 AM PDT     Sunrise
Tue -- 07:36 AM PDT     Moonrise
Tue -- 08:25 AM PDT     0.01 knots Slack
Tue -- 11:12 AM PDT     2.01 knots Max Flood
Tue -- 02:38 PM PDT     -0.01 knots Slack
Tue -- 05:47 PM PDT     -1.77 knots Max Ebb
Tue -- 07:28 PM PDT     Sunset
Tue -- 08:25 PM PDT     Moonset
Tue -- 08:44 PM PDT     0.01 knots Slack
Tue -- 11:29 PM PDT     1.93 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.71.10.3-0.6-1.4-1.8-1.7-1.1-0.40.61.521.91.40.6-0.3-1.1-1.6-1.8-1.3-0.60.31.21.8

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 (17,4,5,8)
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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.