Monday, July24, 2017 L-36.com


Marine Weather and Tides
Belmont, 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 6:06AMSunset 8:24PM Monday July 24, 2017 1:54 PM PDT (20:54 UTC) Moonrise 6:34AMMoonset 8:31PM 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- 926 Am Pdt Mon Jul 24 2017
Today..NW winds 5 to 15 kt. Patchy fog late in the morning.
Tonight..NW winds 5 to 15 kt. Patchy fog after midnight.
Tue..NW winds 5 to 15 kt. Patchy fog in the morning.
Tue night..NW winds 10 to 20 kt. Patchy fog after midnight.
Wed..NW winds 5 to 15 kt. Patchy fog in the morning.
Thu..SW winds 10 kt.
Fri..SW winds 10 kt.
PZZ500 926 Am Pdt Mon Jul 24 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... A weak low pressure system off the california coast will result in light to moderate southerly flow along the coast. Northerly winds will return midweek as low pressure moves inland and high pressure builds over the eastern pacific.

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 242001
afdmtr
area forecast discussion
national weather service san francisco bay area
101 pm pdt Mon jul 24 2017

Synopsis An area of low pressure off of the northern california
coast will maintain seasonably cool temperatures with widespread
night and morning low clouds through Tuesday. Warmer conditions
return for the second half of the week as the upper level ridge
builds back over california. Above averages temperatures are
forecast late in the week and will likely continue into the upcoming
weekend.

Discussion As of 12:58 pm pdt Monday... Temperatures across the
region this afternoon are running a few to as much as 15 degrees
cooler (at the santa rosa asos) compared to yesterday as a
mid upper level trough and associated low pressure system remains
off of the northern california coast. While the fort ord profiler
shows the depth of the marine layer still around 2000 feet, low
clouds have mostly retreated to the coast with sunny conditions
inland and over san francisco. Given the depth of the marine
layer, low clouds will likely push back inland late this evening
and into the valleys overnight, similar to this morning. In
addition, patchy drizzle mist will again be likely along the coast
Tuesday morning. Overall conditions on Tuesday will be similar
today as the weak short-wave trough continues to influence the
region.

The ridge of high pressure over the southwestern portion of the
country is then forecast to build back toward the west coast late in
the week. This will result in a gradual warming trend beginning on
Wednesday and continuing through at least Friday. Inland
temperatures as well as those in the higher elevations will warm
back to above seasonal averages. The marine layer will also likely
become compressed as the ridge aloft builds. Thus, look for less
inland coverage of overnight morning low clouds later in the week.

At this time, the warmest day appears to be on Friday when
widespread 90s are likely during the afternoon hours for inland
areas while weak onshore flow keeps conditions closer to average
near the coast. Cannot rule out a few of the warmest inland spots
briefing exceeding the 100 degree mark on Friday afternoon.

The forecast models put a hold on the warming trend over the weekend
as a mid upper level trough pushes inland across the pacific
northwest. However, still look for temperatures to be above seasonal
averages for most inland areas through the weekend. While there are
some difference in the model solutions late in the period, a further
warming trend looks possible early next week as the ridge
strengthens over the region. With that said, the GFS shows the ridge
a bit further inland with moisture associated with now hurricane
hillary advecting northward toward the california coast early next
week. Thus, still a great deal of uncertainty with regards to the
overall pattern heading into next week. This is still 6 to 7 days
out and will have time to monitor the forecast models in the coming
days.

Aviation As of 10:51 am pdt Monday... Clearing of stratus and fog
is accelerating while the marine layer depth continues to increase.

The marine layer is nearing 2,200 feet deep at the bodega bay and
fort ord profilers.

The 2.6 mb smx-sfo and 2.9 mb sns-sjc pressure gradients are a little
more robust than the NAM is forecasting thus ongoing southerly flow
may hold on a bit longer into this afternoon before the sea-breeze
circulation sets up. A deep, nearly vertically stacked closed low
west of the bay area will remain quasi-stationary through Tuesday,
possibly undergoing a little strengthening and amplification at the
mid-upper levels tonight and Tuesday.

Vicinity of ksfo...VFR through this evening. MVFR cig possibly
returning by 10z Tuesday. Light e-ne wind has developed, and it
may hang on til 21z time-frame before onshore wind returns, low
confidence.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR through this afternoon. CIGS probably
returning this evening though low confidence on timing at this time.

Marine As of 9:33 am pdt Monday... A weak low pressure system
off the california coast will result in light to moderate southerly
flow along the coast. Northerly winds will return midweek as low
pressure moves inland and high pressure builds over the eastern
pacific.

Mtr watches warnings advisories
Tngt Sca... Sf bay until 9 pm
public forecast: rgass
aviation: canepa
marine: canepa mm
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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 mi55 min N 12 G 15 67°F 73°F1010.3 hPa (-0.4)
AAMC1 - 9414750 - Alameda, CA 17 mi55 min W 5.1 G 8 68°F 67°F1011.8 hPa (+0.0)
LNDC1 19 mi55 min WNW 2.9 G 9.9 67°F 1011.3 hPa
OBXC1 20 mi55 min 64°F 56°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 20 mi55 min WSW 8.9 G 15 65°F 1010.5 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 20 mi55 min W 7 G 9.9
OKXC1 - 9414776 - Oakland (Berth 34), CA 20 mi55 min W 7 G 8.9 65°F 1011.5 hPa (+0.0)
PXSC1 21 mi55 min 66°F 57°F
FTPC1 - 9414290 - San Francisco, CA 22 mi55 min SW 15 G 27 60°F 59°F1012.1 hPa (+0.0)
46237 - San Francisco Bar, CA (142) 26 mi55 min 56°F4 ft
PPXC1 - 9414847 - Richmond (Point Potrero), CA 27 mi55 min WSW 18 G 25 62°F 1011.8 hPa (+0.0)
RCMC1 - 9414863 - Richmond, CA 29 mi55 min WSW 8.9 G 15 61°F 64°F1011.8 hPa (+0.3)
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 34 mi65 min S 12 G 14 56°F 57°F8 ft1011.7 hPa (+0.3)
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 34 mi65 min S 3.9 G 5.8 55°F 55°F5 ft1012.1 hPa (+0.3)
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 37 mi55 min WSW 15 G 20 63°F 1011.1 hPa (+0.0)
MZXC1 - 9415102 - Martinez-Amorco CA 37 mi55 min W 19 G 22 67°F 71°F1010.8 hPa (+0.0)58°F
PCOC1 - 9415144 - Port Chicago, CA 39 mi55 min W 20 G 24 67°F 72°F1010.5 hPa (+0.0)
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 42 mi61 min NW 14 G 20 69°F 1009.9 hPa
SFXC1 - San Francisco Bay Reserve, CA 49 mi70 min WNW 12 74°F 1010 hPa57°F
PRYC1 - 9415020 - Point Reyes, CA 49 mi55 min SE 12 G 18 61°F 56°F1011.7 hPa (+0.3)

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Carlos Airport, CA2 mi68 minNW 910.00 miA Few Clouds73°F57°F57%1011.2 hPa
San Francisco, San Francisco International Airport, CA8 mi59 minNE 410.00 miA Few Clouds71°F55°F59%1011 hPa
Palo Alto Airport, CA9 mi68 minNNW 1010.00 miClear75°F60°F61%1010.5 hPa
Half Moon Bay Airport, CA12 mi60 minS 14 G 2010.00 miMostly Cloudy63°F57°F83%1011.8 hPa
Hayward, Hayward Air Terminal, CA13 mi61 minWNW 1010.00 miFair75°F53°F46%1011.6 hPa
Oakland, Metro Oakland International Airport, CA13 mi62 minNW 710.00 miA Few Clouds74°F55°F54%1011.1 hPa
Mountain View, Moffett Field, CA14 mi59 minNNW 109.00 miFair77°F59°F54%1010.7 hPa
San Jose, San Jose International Airport, CA21 mi62 minVar 310.00 miA Few Clouds82°F53°F37%1010 hPa

Wind History from SQL (wind in knots)
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Last 24hrN11NW10NW8NW8NW7N5CalmN3NW5NW4NW5NW4NW3NW4NW5NW4NW5Calm435NE6NW9W8
1 day agoNW7N8N7N8NW10NW8N5N5N3NW3CalmN3NW4CalmNW3NW3NW3CalmCalm3N6N5N8N11
2 days agoW12W13W14
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W12W9NW4NW5NW3W3SW4CalmCalmCalmNW333NE444NE7NW5

Tide / Current Tables for Smith Slough, San Francisco Bay, California
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Smith Slough
Click for Map
Mon -- 01:25 AM PDT     9.02 feet High Tide
Mon -- 06:06 AM PDT     Sunrise
Mon -- 07:34 AM PDT     Moonrise
Mon -- 08:48 AM PDT     -1.25 feet Low Tide
Mon -- 03:13 PM PDT     7.57 feet High Tide
Mon -- 08:23 PM PDT     Sunset
Mon -- 08:50 PM PDT     2.15 feet Low Tide
Mon -- 09:31 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
7.88.98.986.34.11.90.1-1-1.2-0.51.1356.77.57.36.34.83.42.42.22.94.4

Tide / Current Tables for San Mateo Bridge, South San Francisco Bay, California Current
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San Mateo Bridge
Click for Map
Mon -- 02:07 AM PDT     -0.00 knots Slack
Mon -- 05:43 AM PDT     -2.33 knots Max Ebb
Mon -- 06:06 AM PDT     Sunrise
Mon -- 07:34 AM PDT     Moonrise
Mon -- 09:06 AM PDT     0.01 knots Slack
Mon -- 11:59 AM PDT     2.34 knots Max Flood
Mon -- 03:33 PM PDT     -0.00 knots Slack
Mon -- 06:19 PM PDT     -1.30 knots Max Ebb
Mon -- 08:23 PM PDT     Sunset
Mon -- 09:06 PM PDT     0.00 knots Slack
Mon -- 09:31 PM PDT     Moonset
Mon -- 11:47 PM PDT     1.78 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.610.1-0.8-1.7-2.2-2.3-1.9-1.2-0.11.22.12.32.11.50.6-0.4-1-1.3-1.2-0.8-0.10.91.6

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 (16,3,4,5)
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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.