Friday, August23, 2019 L-36.com


Marine Weather and Tides
Santa Clara, 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 6:28AMSunset 7:52PM Thursday August 22, 2019 11:53 PM PDT (06:53 UTC) Moonrise 10:53PMMoonset 12:02PM Illumination 48% Phase: Third Quarter Moon; Moon at 22 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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PZZ560 Coastal Waters From Pigeon Point To Point Pinos California Out To 10 Nm- 917 Pm Pdt Thu Aug 22 2019
Tonight..NW winds 15 to 25 kt with gusts up to 30 kt, diminishing to 10 to 15 kt after midnight. NW swell 7 to 9 ft at 9 seconds, becoming W 6 to 7 ft at 9 seconds after midnight. SWell sw around 2 ft.
Fri..SW winds 10 to 15 kt. NW swell 5 to 7 ft at 9 seconds and sw around 2 ft at 18 seconds.
Fri night..S winds 5 to 10 kt. NW swell 4 to 6 ft at 10 seconds and sw around 2 ft at 16 seconds.
Sat..SW winds 5 to 10 kt. Mixed swell nw 2 to 4 ft at 10 seconds and sw around 2 ft at 16 seconds.
Sat night..NW winds around 5 kt. Wind waves 2 to 3 ft. W swell 2 to 3 ft at 13 seconds and sw around 2 ft at 15 seconds.
Sun..W winds 10 to 15 kt. Wind waves 2 to 3 ft. W swell 2 to 3 ft at 13 seconds and sw around 2 ft at 15 seconds.
Sun night..NW winds 5 to 10 kt. Wind waves 1 to 2 ft. NW swell 3 to 5 ft at 12 seconds and sw around 2 ft at 15 seconds.
Mon..W winds 5 to 10 kt. Wind waves 3 to 4 ft. NW swell 3 to 5 ft and sw around 2 ft.
Tue..SW winds 5 to 10 kt. Wind waves around 2 ft. NW swell 3 to 4 ft and sw around 2 ft.
PZZ500 917 Pm Pdt Thu Aug 22 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Northwest winds across the waters will generate a steep northwest swell hazardous to small craft vessels at 8 to 10 second periods tonight into Friday. A coastally trapped southerly wind reversal will also develop turning winds to a southwesterly direction along the coast late tonight through Friday. A decreasing northerly pressure gradient and winds Friday will ease aforementioned wind generated seas. Small, longer period swells will move through the coastal waters next week.


7 Day Forecast for Marine Location Near Santa Clara, CA
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location: 37.38, -121.9     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 230614
afdmtr
area forecast discussion
national weather service san francisco bay area
1114 pm pdt Thu aug 22 2019

Synopsis The warm temperatures today cool slightly on Friday
across the bay area. However, high dew point temperatures
tomorrow will keep inland areas feeling warmer. Temperatures will
increase this weekend as high pressure builds over california
lasting through the early work week. By midweek, moisture
increases as the remnants of ivo traverses northward in the
pacific ocean just off the california coast allowing muggy
conditions to return.

Discussion As of 9:40 pm pdt Thursday... Higher humidity values
today, especially this morning, resulted in much warmer minimum
temperatures, especially in higher terrain areas. This morning's
lows ranged from the upper 50s to the lower 70s, which were as
many as 10 to 15 degrees above yesterday's mins in some cases.

High temperatures today were a mixed bag, with some warmer and
some slightly cooler than yesterday's values. Today's highs ranged
from the 60s to lower 70s at the immediate coast to the 80s and
90s most other locations. The warmest locations reached 100
degrees, bookending our cwa, at pope valley in northern napa
county, as well as bradley in southern monterey county. Current
observations indicate that dew point temperatures are cooler than
last night at this time, thus, expect cooler minimum temperatures
tonight. Latest satellite imagery shows scant stratus formation
thus far, limited to along the coast from san mateo county south
as well as through the monterey bay and starting to extend down
the salinas valley. The marine layer depth is a little higher per
the fort ord profiler, and onshore flow persists with 2.5 mb
between sfo and sac, so expect the area of low clouds to expand
farther inland overnight. Did a minor update to the temperature
forecast for tomorrow, mainly to cool some temperatures somewhat
to reflect a slightly stronger seabreeze by tomorrow afternoon.

Previous discussion There are higher dewpoint temperatures
today around the bay area, ranging from 61 in salinas to 69 in san
jose giving a muggy feel to the day. The marine layer has been
pseudo- constant around 1500 feet the last few hours and will
remain fairly shallow overnight, though patchy fog may be possible
in the early morning hours along the coast. Onshore flow
strengthens slightly tomorrow, providing slightly cooler
temperatures on Friday. Lingering higher dew point temperatures
inland will keep temperatures feeling warmer for interior
locations.

High pressure builds over california this weekend which will drive a
warming trend for temperatures. Temperatures will MAX out on Sunday
in the mid to upper 90s, with isolated locations in southern san
benito and monterey counties reaching the low 100s. However, those
values are based on current models having the ridge axis of high
pressure north of the bay area. If the ridge retrogrades slightly,
temperatures around our area could increase even higher, thus will
be monitored as the next round of models are produced.

The warming trend looks to continue through the early part of the
work week. By Wednesday, the remnants of the tropical system ivo
will have moved northward in the pacific just west of the bay area.

Ivo will bring an increase in moisture giving a better chance for
clouds cover across the area and an overall muggy feeling. No
precipitation or thunderstorms are currently forecast, though it
will be something that will be closely monitored as the time
interval draws closer.

Aviation As of 11:14 pm pdt Thursday...VFR except vlifr-ifr
along the coast, extending eastward over the san francisco bay,
and also moving into nearby coastal valleys tonight and Friday
morning. On Friday diurnal mixing should lift ceilings toVFR at
most, mainly inland, terminals, however in terms of areal coverage
of coastal stratus and fog it's a very low confidence forecast for
Friday into Saturday morning; a 4 mb smx-sfo pressure gradient
and wind will be juxtaposed to a diminishing 3 mb or less acv-sfo
pressure gradient and wind resulting in any combination of coverage.

Vicinity of ksfo...VFR, west wind has diminished. Seeing signs that
the aforementioned smx-sfo pressure gradient is getting a foothold
(usually the NAM is slow with this forecast). Under a compressed
marine layer this combination should keepVFR going for the period.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Vlifr-ifr due to increasing stratus and
fog coverage extending into the salinas valley. Low ceilings and
visibilities lift toVFR by late Friday morning, then low confidence
stratus and fog return Friday evening and night.

Marine As of 9:17 pm pdt Thursday... Northwest winds across the
waters will generate a steep northwest swell hazardous to small
craft vessels at 8 to 10 second periods tonight into Friday. A
coastally trapped southerly wind reversal will also develop
turning winds to a southwesterly direction along the coast late
tonight through Friday. A decreasing northerly pressure gradient
and winds Friday will ease aforementioned wind generated seas.

Small, longer period swells will move through the coastal waters
next week.

Mtr watches warnings advisories
Tngt Sca... Pt arena to pigeon pt 10-60 nm
sca... Pt reyes to pigeon pt 0-10 nm until 3 am
sca... Pt pinos to pt piedras blancas 0-10 nm until 3 am
sca... Pigeon pt to pt piedras blancas 10-60 nm until 3 am
sca... Pt arena to pt reyes 0-10 nm
public forecast: sims
aviation marine: canepa
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 19 mi60 min NW 5.1 G 7 63°F 75°F1008 hPa
AAMC1 - 9414750 - Alameda, CA 34 mi60 min W 8.9 G 11 63°F 73°F1008 hPa
LNDC1 35 mi60 min SW 4.1 G 5.1 63°F 1007.4 hPa
OBXC1 37 mi60 min 63°F 60°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 37 mi60 min SW 5.1 G 7
OKXC1 - 9414776 - Oakland (Berth 34), CA 38 mi60 min SW 2.9 G 5.1 63°F 1007.4 hPa
PXSC1 39 mi60 min 63°F 58°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 39 mi66 min WSW 5.1 G 7 62°F 1006.4 hPa
ELXC1 - Elkhorn Slough Reserve, CA 40 mi69 min S 5.1 59°F 1007 hPa58°F
MLSC1 - Moss Landing, South Harbor, CA 40 mi50 min SE 5.1 G 15 59°F 1008 hPa58°F
FTPC1 - 9414290 - San Francisco, CA 42 mi60 min SSW 4.1 G 7 60°F 62°F1007.7 hPa
46092 - MBM1 44 mi44 min NW 7.8 58°F 57°F1007.4 hPa (+0.5)
PPXC1 - 9414847 - Richmond (Point Potrero), CA 44 mi66 min SSW 11 G 16 62°F 1007.5 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 46 mi103 min S 4.1 62°F 1007 hPa
RCMC1 - 9414863 - Richmond, CA 46 mi60 min S 6 G 11 63°F 65°F1006.9 hPa
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 46 mi60 min WNW 8 G 9.9 75°F 1005.3 hPa
UPBC1 47 mi66 min WNW 8 G 8.9
PCOC1 - 9415144 - Port Chicago, CA 47 mi60 min SW 8 G 8.9 71°F 74°F1006.2 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 47 mi60 min WNW 8.9 G 9.9 70°F 71°F1006.2 hPa
46237 - San Francisco Bar, CA (142) 48 mi54 min 62°F7 ft
46042 - MONTEREY - 27NM West of Monterey Bay, CA 49 mi64 min 14 G 18 59°F 58°F8 ft1007.4 hPa (+0.6)

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, CA2 mi2 hrsNNW 810.00 miFair67°F60°F79%1007.2 hPa
San Jose / Reid / Hillv, CA5 mi2 hrsWNW 610.00 miClear70°F59°F69%1007.4 hPa
Mountain View, Moffett Field, CA9 mi4 hrsNNW 810.00 miFair69°F61°F76%1007.2 hPa
Palo Alto Airport, CA14 mi3.1 hrsNW 710.00 miClear66°F60°F83%1007.1 hPa
Hayward, Hayward Air Terminal, CA23 mi2 hrsNNW 610.00 miFair64°F57°F78%1008.3 hPa
Livermore, Livermore Municipal Airport, CA23 mi2 hrsSW 310.00 miFair72°F54°F53%1006.2 hPa

Link to 5 minute data for KSJC

Wind History from SJC (wind in knots)
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Last 24hr--NE5N4--NW3N3CalmN3W3--NW4Calm3N8NW4NW8NW10NW11NW14NW10------NW8
1 day ago--------SW3CalmCalm----S3CalmCalmCalm6--NW10NW12N13NW14N11N12--N10N10
2 days ago----N5NW7NW5NW6NW4NW6W5NW7W5N5N54N13
G16
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G23
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Tide / Current Tables for Gold Street Bridge, Alviso Slough, San Francisco Bay, California
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Gold Street Bridge
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Fri -- 02:09 AM PDT     1.54 feet Low Tide
Fri -- 06:30 AM PDT     Sunrise
Fri -- 07:30 AM PDT     6.32 feet High Tide
Fri -- 07:58 AM PDT     Last Quarter
Fri -- 01:38 PM PDT     2.79 feet Low Tide
Fri -- 02:03 PM PDT     Moonset
Fri -- 06:58 PM PDT     9.21 feet High Tide
Fri -- 07:49 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.71.91.51.92.94.35.56.26.35.85.14.23.42.92.83.65.27.18.69.28.98.16.85.2

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
Fri -- 01:50 AM PDT     0.00 knots Slack
Fri -- 04:20 AM PDT     0.80 knots Max Flood
Fri -- 06:30 AM PDT     Sunrise
Fri -- 07:42 AM PDT     -0.00 knots Slack
Fri -- 07:58 AM PDT     Last Quarter
Fri -- 11:31 AM PDT     -0.56 knots Max Ebb
Fri -- 01:14 PM PDT     0.00 knots Slack
Fri -- 02:04 PM PDT     Moonset
Fri -- 04:16 PM PDT     0.76 knots Max Flood
Fri -- 07:11 PM PDT     -0.00 knots Slack
Fri -- 07:50 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.8-0.30.10.50.80.70.60.3-0.1-0.3-0.4-0.5-0.5-0.10.20.50.70.70.40.1-0.2-0.5-0.7-0.9

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 (2,6,7,8)
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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.