Saturday, August17, 2019 L-36.com


Marine Weather and Tides
San Jose, CA

Version 3.4
NOTICE
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:23AMSunset 7:58PM Saturday August 17, 2019 3:32 PM PDT (22:32 UTC) Moonrise 8:29PMMoonset 7:17AM Illumination 95% Phase: Waning Gibbous; Moon at 17 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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PZZ535 Monterey Bay- 252 Pm Pdt Sat Aug 17 2019
Tonight..SW winds 5 to 10 kt. Wind waves 1 ft. W swell 3 to 5 ft at 9 seconds.
Sun..SW winds 10 to 15 kt. Wind waves 1 ft. W swell 2 to 4 ft at 9 seconds.
Sun night..W winds 5 to 10 kt. Wind waves 1 ft. W swell 3 to 5 ft at 9 seconds.
Mon..W winds 15 to 20 kt. Wind waves 2 to 3 ft. W swell 3 to 4 ft at 9 seconds and sw around 2 ft at 15 seconds.
Mon night..NW winds 10 to 15 kt. Wind waves 1 to 2 ft. W swell 3 to 5 ft at 9 seconds and S around 2 ft at 15 seconds.
Tue..W winds 15 to 20 kt with gusts up to 25 kt. Wind waves 1 ft. W swell 2 to 4 ft at 9 seconds.
Tue night..NW winds 10 to 15 kt. Wind waves 1 to 2 ft. W swell 3 to 5 ft at 9 seconds.
Wed..NW winds 10 to 15 kt. Wind waves 1 to 2 ft. W swell 3 to 5 ft.
Thu..W winds 10 to 15 kt. Wind waves 1 to 2 ft. NW swell 4 to 5 ft. Locally lower winds and seas across sheltered portions of the bay.
PZZ500 252 Pm Pdt Sat Aug 17 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Moderate to gusty northwesterly winds will persist over the northern and outer waters into Sunday as high pressure dominates the eastern pacific. The high pressure will begin to weaken on Sunday and into early next week ahead of a developing low pressure center off of british columbia. The persistent fetch produced by these systems will generate fresh short period swell that will propagate into the california coastal waters. This short period swell in combination with gusty winds will generate hazardous seas conditions, particularly for smaller vessels.


7 Day Forecast for Marine Location Near San Jose, CA
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location: 37.26, -121.78     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 172033
afdmtr
area forecast discussion
national weather service san francisco bay area
133 pm pdt Sat aug 17 2019

Synopsis The cooling trend continues today with clear skies
inland with a deep marine layer and stratus clouds along the
coastline. These conditions should continue on Sunday as well. Dry
and seasonable temperatures are expected Monday and Tuesday before
the next warming trend begins midweek.

Discussion As of 01:33 pm pdt Saturday... Another day to show
off the cooling trend that is currently under way for the bay
area. At the time of writing this afd napa is 12 degrees cooler
than this time yesterday, concord and san jose are 13 degrees
cooler, and livermore is 18 degrees cooler. These cooler temps are
being driven by an upper level trough axis sitting right over the
bay area. The fort ord profiler has shown the marine layer has
deepened to 2500 feet by 9am this morning while onshore flow
persists along the coast. Clear skies can be found for inland
locations, but stratus clouds linger just offshore. There is a
small chance for patchy areas along the san mateo, santa cruz, and
big sur coastlines to have light drizzle overnight and in the
early morning hours Sunday. But most drizzle chances should be
done by mid morning. Tomorrow, the stratus will continue to linger
near the coastline, while inland areas should be mostly clear
once again. The cooling trend continues tomorrow, but with less
magnitude than yesterday and today.

The low in canada that is directing the trough moves eastward Sunday
evening, as high pressure begins to build over texas. The growing
high pressure will rotate the trough from a positive tilt to a
negative tilt, but with near consistent dam heights it will not
impact the conditions at the surface. This will allow for dry,
seasonal conditions for the early work week. As a strong low takes
shape in the north pacific, the high pressure continues to build
in the southern plains and slowly shifts toward the desert
southwest by midweek, leading to a warming trend for the bay area
expected to last until the end of the work week.

Aviation As of 10:45 am pdt Saturday...VFR conditions have
returned across much of the bay area with lingering MVFR ifr
ceilings holding on around the monterey bay terminals. Should see
improving conditions region-wide as low clouds dissipate and
scatter through the remainder of the morning. Onshore winds will
increase a bit and become locally gusty this afternoon and
evening. Latest thinking is that low clouds will make an early
return late this evening as the marine layer continues to deepen.

Timing of clearing on Sunday remains a bit more tricky as cold air
advection arriving from the north should help to mix out the
marine inversion. However, look for MVFR ifr ceilings to impact
most terminals overnight tonight through early Sunday morning.

Vicinity of ksfo...VFR. Onshore winds will increase and become
locally gusty through the afternoon. Low clouds potentially make
an early return late this evening and will likely linger into
Sunday morning.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... MVFR ifr conditions linger this morning
given a decent onshore and a moist boundary layer. Should see
these clouds scatter out by early afternoon giving way toVFR
conditions. Modest onshore winds will also persist this afternoon
and into the early evening hours. MVFR ifr conditions return late
this evening and will likely persist into Sunday morning.

Marine As of 4:41 am pdt Saturday... Moderate to gusty
northwesterly winds will continue over the northern and outer
waters into Sunday as high pressure remains over the eastern
pacific. This high pressure will begin to weaken into Sunday
before a strong low pressure center develops and approaches
british columbia early next week. The persistent fetch produced by
these systems will generate fresh short period swell that will
propagate into the california coastal waters. This short period
swell in combination with gusty winds will generate hazardous seas
conditions, particularly for smaller vessels.

Mtr watches warnings advisories
Tngt Sca... Pt arena to pigeon pt 10-60 nm
sca... Pt arena to pt reyes 0-10 nm until 3 pm
sca... Sf bay until 9 pm
public forecast: dk
aviation: rgass
marine: canepa
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 29 mi44 min W 13 G 15 70°F 77°F1010.3 hPa
ELXC1 - Elkhorn Slough Reserve, CA 31 mi107 min WNW 8 64°F 1012 hPa58°F
MLSC1 - Moss Landing, South Harbor, CA 32 mi93 min W 7 G 20 62°F 1013.3 hPa (-0.7)57°F
46092 - MBM1 38 mi82 min W 9.7 60°F 59°F1012.8 hPa (-1.4)
46240 - Cabrillo Point, Monterey Bay, CA (158) 44 mi32 min 57°F2 ft
AAMC1 - 9414750 - Alameda, CA 45 mi50 min W 14 G 18 65°F 70°F1010.9 hPa
46042 - MONTEREY - 27NM West of Monterey Bay, CA 46 mi42 min WNW 3.9 G 3.9 60°F 62°F8 ft1012.2 hPa (-0.7)
LNDC1 46 mi44 min W 12 G 17 66°F 1010.4 hPa
MEYC1 46 mi56 min 57°F1012.3 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 47 mi44 min WSW 21 G 24
46114 - West Monterey Bay, CA 48 mi32 min 61°F8 ft
OBXC1 48 mi44 min 63°F 58°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 48 mi44 min W 12 G 18 65°F 1010.4 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 49 mi44 min WSW 6 G 14 64°F 1009.6 hPa

Wind History for Redwood City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
San Jose, San Jose International Airport, CA11 mi1.7 hrsS 1010.00 miA Few Clouds80°F55°F44%1009.6 hPa
Mountain View, Moffett Field, CA19 mi96 minSSE 710.00 miFair82°F55°F41%1010 hPa
Watsonville, Watsonville Municipal Airport, CA22 mi1.7 hrsSW 910.00 miOvercast65°F55°F70%1013.2 hPa
Palo Alto Airport, CA24 mi45 minN 710.00 miClear77°F59°F54%1009.8 hPa

Link to 5 minute data for KRHV

Wind History from RHV (wind in knots)
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Last 24hrNW11--NW7W4SW3------------------CalmCalmN4Calm5W7NW11NW10NW6NW6
1 day agoNW9NW9NW8NW6Calm------------------Calm----Calm----W6NW5NW11NW11
2 days agoNW9W8W7W4W5------------------CalmCalm4N5NW3W6W8NW8NW6NW8

Tide / Current Tables for Gold Street Bridge, Alviso Slough, San Francisco Bay, California
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Gold Street Bridge
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Sat -- 02:00 AM PDT     9.60 feet High Tide
Sat -- 06:25 AM PDT     Sunrise
Sat -- 08:17 AM PDT     Moonset
Sat -- 09:48 AM PDT     0.20 feet Low Tide
Sat -- 03:25 PM PDT     8.41 feet High Tide
Sat -- 07:57 PM PDT     Sunset
Sat -- 09:29 PM PDT     Moonrise
Sat -- 09:57 PM PDT     2.50 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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6.78.79.69.38.26.74.72.91.30.40.21.235.27.18.38.37.66.34.93.62.82.53.3

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
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Sat -- 02:30 AM PDT     -0.00 knots Slack
Sat -- 06:25 AM PDT     Sunrise
Sat -- 07:01 AM PDT     -1.30 knots Max Ebb
Sat -- 08:18 AM PDT     Moonset
Sat -- 09:40 AM PDT     0.01 knots Slack
Sat -- 12:18 PM PDT     1.37 knots Max Flood
Sat -- 03:35 PM PDT     -0.00 knots Slack
Sat -- 07:28 PM PDT     -0.87 knots Max Ebb
Sat -- 07:58 PM PDT     Sunset
Sat -- 09:30 PM PDT     Moonrise
Sat -- 09:41 PM PDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.10.80.3-0.2-0.6-1-1.2-1.3-1-0.50.311.31.310.4-0.1-0.5-0.7-0.9-0.8-0.40.20.8

Weather Map and Satellite Images
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wmap_P
GOES Local Image of CentralWestCoast    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for San Francisco/Monterey Bay Area, CA (18,4,5,8)
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Ground Weather Radar Station San Francisco Bay Area, CA
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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.