Friday, February23, 2018 L-36.com


Marine Weather and Tides
Sunnyvale, 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 6:43AMSunset 5:57PM Friday February 23, 2018 12:38 PM PST (20:38 UTC) Moonrise 11:40AMMoonset 1:03AM Illumination 61% Phase: Waxing Gibbous; Moon at 8 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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PZZ530 San Pablo Bay Suisun Bay The West Delta And San Francisco Bay North Of The Bay Bridge- 815 Am Pst Fri Feb 23 2018
Today..N winds 5 to 15 kt.
Tonight..W winds 5 to 15 kt.
Sat..W winds 10 kt...becoming nw 10 to 20 kt in the afternoon. Patchy frost in the morning.
Sat night..NW winds 10 to 20 kt.
Sun..W winds 10 to 20 kt.
Mon..W winds 5 to 15 kt...becoming north 10 to 20 kt. Chance of showers, then slight chance of showers.
Tue..NW winds 5 to 15 kt. Slight chance of showers.
PZZ500 815 Am Pst Fri Feb 23 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Gale-force northerly winds over the outer waters will subside later this morning. High pressure over the eastern pacific will continue to produce moderate to strong winds over the coastal waters into the weekend.

7 Day Forecast for Marine Location Near Sunnyvale, CA
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location: 37.42, -121.98     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 231740
afdmtr
area forecast discussion
national weather service san francisco bay area
940 am pst Fri feb 23 2018

Synopsis Mostly sunny skies will prevail around the bay area
today. Another very cool night is forecast for Friday night. Dry
weather and slightly warmer temperatures are expected over the
weekend. Cooler, unsettled weather is expected to return by early
next week with another system bringing rain to the area later next
week.

Discussion As of 07:51 am pst Friday... Decreased winds and
clear skies led to a rather chilly start this morning. Morning
lows ranged from the 20s across the interior and inland valleys
with 30s low 40s closer to the coast and major urban centers. The
morning lows are running about 10 to 18 degrees colder this
morning than Thursday morning. Today's weather will feature sunny
skies, but below normal high temperatures. Highs will be in the
50s and 40s across the highest peaks.

No morning update planned at this time.

Afternoon forecast package will focus on chilly overnight lows
this weekend and rain (mt snow) next week.

Prev discussion As of 2:50 am pst Friday...

dry conditions and a bit of a warming trend are expected over the
weekend, although morning lows on Saturday will be chilly once
again. With weak high pressure building along the coast, by
Sunday, the high temperatures are forecast to warm to the lower
60s in warmest areas.

Another upper trough is then progged to drop south into northern
california from british columbia early next week bringing rain
chances to the area by Monday. Once again, a limited moisture
source will keep qpfs low on the low side with less than a quarter
of an inch expected through Tuesday morning. Another system near
the end of the workweek could produce more rain for the area with
the trough farther west over the pacific than the latest systems.

There are differences in model solutions with this system, though,
with the latest runs of the GFS keeping precip farther to the
north through the following weekend.

Aviation As of 9:40 am pst Friday... For 18z tafs.VFR
conditions through the period with mainly clear skies. Winds west
to northwest at 10 to 20 kt in the afternoon.

Vicinity of ksfo...VFR conditions are expected to prevail with
mainly clear skies. West to northwest winds 10 to 20 kt before
decreasing in the evening.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR through the period with mainly clear
skies. Possibly few to sct low clouds tonight into tomorrow
morning. Onshore winds this afternoon.

Marine As of 08:15 am pst Friday... Gale-force northerly winds
over the outer waters will subside later this morning. High
pressure over the eastern pacific will continue to produce
moderate to strong winds over the coastal waters into the weekend.

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

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 14 mi50 min N 8.9 G 13 47°F 52°F1029.7 hPa
LNDC1 30 mi50 min N 7 G 15 49°F 1028.8 hPa
AAMC1 - 9414750 - Alameda, CA 30 mi56 min NNW 6 G 12 49°F 52°F1029.1 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 32 mi50 min NNE 13 G 16
OKXC1 - 9414776 - Oakland (Berth 34), CA 33 mi50 min NNE 12 G 15 48°F 1029.1 hPa
OBXC1 33 mi50 min 50°F 25°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 34 mi50 min NW 8.9 G 11 46°F 1028.4 hPa
PXSC1 34 mi50 min 47°F 28°F
FTPC1 - 9414290 - San Francisco, CA 37 mi56 min NNE 8.9 G 11 46°F 52°F1029.7 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 39 mi50 min N 8.9 G 16 51°F 1029.2 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 41 mi134 min NNW 7 44°F 1029 hPa
RCMC1 - 9414863 - Richmond, CA 42 mi56 min N 6 G 9.9 47°F 52°F1029.1 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 43 mi50 min E 1.9 G 5.1 50°F 52°F1029 hPa21°F
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 43 mi50 min NNE 17 G 21 48°F 1028.8 hPa
46237 - San Francisco Bar, CA (142) 43 mi98 min 51°F6 ft
PCOC1 - 9415144 - Port Chicago, CA 44 mi50 min NW 2.9 G 8 49°F 51°F1028.8 hPa
ELXC1 - Elkhorn Slough Reserve, CA 44 mi113 min N 6 49°F 1028 hPa25°F
46092 - MBM1 46 mi93 min NNW 3.9 47°F 52°F1029 hPa (+1.6)
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 46 mi56 min NNW 9.9 G 14 49°F 1028.9 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 48 mi48 min N 9.7 G 14 46°F 52°F10 ft1029.3 hPa (+1.0)
46042 - MONTEREY - 27NM West of Monterey Bay, CA 49 mi48 min NNW 14 G 18 47°F 53°F10 ft1029 hPa (+1.1)

Wind History for Redwood City, CA
(wind in knots)    EDIT      (on/off)   Help
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W17
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G30
W19
G25
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G8
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G9
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G15
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N5
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Mountain View, Moffett Field, CA4 mi42 minNNW 910.00 miFair51°F21°F32%1029.4 hPa
San Jose, San Jose International Airport, CA4 mi45 minNW 710.00 miA Few Clouds52°F19°F28%1028.7 hPa
Palo Alto Airport, CA8 mi51 minNNW 1010.00 miClear68°F19°F16%1029.1 hPa
San Jose / Reid / Hillv, CA10 mi51 minN 1010.00 miClear50°F17°F28%1028.1 hPa
San Carlos Airport, CA16 mi1.9 hrsNW 1010.00 miClear48°F21°F34%1029.5 hPa
Hayward, Hayward Air Terminal, CA18 mi44 minNNE 8 G 1710.00 miA Few Clouds52°F14°F22%1029.9 hPa
Livermore, Livermore Municipal Airport, CA21 mi45 minNNE 1310.00 miFair49°F19°F31%1028.4 hPa
Oakland, Metro Oakland International Airport, CA23 mi45 minNNW 610.00 miA Few Clouds51°F19°F28%1029 hPa
San Francisco, San Francisco International Airport, CA24 mi42 minN 1210.00 miFair50°F24°F36%1029.2 hPa

Wind History from SJC (wind in knots)
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Last 24hrNW20
G25
W11
G20
W16W12SW16
G23
W12W13
G23
W12W15W9W8W3NW3W5NW4CalmW8CalmW4NW7W11NW11NW13NW7
1 day ago5CalmW8W6NW8NW9NW10NW10W8W4W6S4CalmSE3CalmS3E3E5SE3W8W9W14NW10
G21
W14
G26
2 days agoCalm4NW14NW16NW12NW9W9SW4SW3CalmE5SE6E4SE3SE3SE4S5E4CalmSE3SE6CalmCalm6

Tide / Current Tables for Gold Street Bridge, Alviso Slough, San Francisco Bay, California
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Gold Street Bridge
Click for Map
Fri -- 12:09 AM PST     First Quarter
Fri -- 12:27 AM PST     2.23 feet Low Tide
Fri -- 01:02 AM PST     Moonset
Fri -- 05:49 AM PST     9.65 feet High Tide
Fri -- 06:47 AM PST     Sunrise
Fri -- 11:40 AM PST     Moonrise
Fri -- 02:00 PM PST     0.56 feet Low Tide
Fri -- 05:55 PM PST     Sunset
Fri -- 07:55 PM PST     6.66 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.32.43.65.57.69.29.69.28.26.74.93.11.70.90.61.12.33.85.26.36.76.35.54.4

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 -- 12:09 AM PST     First Quarter
Fri -- 12:29 AM PST     0.00 knots Slack
Fri -- 01:03 AM PST     Moonset
Fri -- 03:19 AM PST     0.90 knots Max Flood
Fri -- 06:17 AM PST     -0.01 knots Slack
Fri -- 06:47 AM PST     Sunrise
Fri -- 11:02 AM PST     -1.17 knots Max Ebb
Fri -- 11:40 AM PST     Moonrise
Fri -- 01:56 PM PST     0.00 knots Slack
Fri -- 04:35 PM PST     1.08 knots Max Flood
Fri -- 05:56 PM PST     Sunset
Fri -- 08:01 PM PST     -0.01 knots Slack
Fri -- 11:38 PM PST     -0.59 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.20.20.60.90.80.60.1-0.2-0.5-0.9-1.1-1.2-0.9-0.500.611.10.90.50-0.3-0.5-0.6

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 (15,3,4,5)
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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.