Wednesday, June28, 2017 L-36.com


Marine Weather and Tides
El Granada, 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 5:50AMSunset 8:37PM Wednesday June 28, 2017 3:51 PM PDT (22:51 UTC) Moonrise 10:02AMMoonset 11:16PM Illumination 24% Phase: Waxing Crescent; Moon at 5 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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PZZ545 Point Reyes To Pigeon Point To 10 Nm- 251 Pm Pdt Wed Jun 28 2017
.small craft advisory in effect through late tonight...
Tonight..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 5 to 7 ft at 9 seconds. Patchy fog after midnight.
Thu..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 4 to 6 ft at 10 seconds. Patchy fog in the morning.
Thu night..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 7 to 9 ft at 10 seconds. Patchy fog after midnight.
Fri..NW winds 20 to 30 kt. Wind waves 3 to 5 ft. NW swell 6 to 8 ft at 10 seconds. Patchy fog in the morning.
Fri night..NW winds 20 to 30 kt. Wind waves 5 to 7 ft. NW swell 8 to 10 ft at 10 seconds. Patchy fog after midnight.
Sat..NW winds 20 to 30 kt. Wind waves 4 to 6 ft. NW swell 7 to 9 ft. Patchy fog.
Sun..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 6 to 8 ft. Patchy fog.
Mon..SW winds 10 to 20 kt. Wind waves 2 to 4 ft. NW swell 5 to 7 ft.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...combined seas 4 to 6 ft with a dominant swell period of 9 seconds. Across the bar...combined seas 5 to 7 ft with a dominant swell period of 9 seconds. Maximum ebb current of 1 knots at 08:00 pm Wednesday and 1.5 knots at 07:06 am Thursday.
PZZ500 251 Pm Pdt Wed Jun 28 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Building high pressure off the california coast will maintain strong and gusty northerly winds through the remainder of the week and into the upcoming weekend. Steep wind waves and fresh swell will dominate the coastal waters as a result of the strong winds. Persons operating small crafts should use extra caution along the central california coast and bays through at least the forthcoming weekend.

7 Day Forecast for Marine Location Near El Granada, CA
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location: 37.5, -122.48     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 282102
afdmtr
area forecast discussion
national weather service san francisco bay area
202 pm pdt Wed jun 28 2017

Synopsis Seasonable summer pattern in place with a marine layer
along the coast leading to areas of night and morning low clouds
followed by sunny afternoons away from the coast right through the
4th of july holiday.

Discussion As of 2:02 pm pdt Wednesday... Marine layer has
compressed slightly to just under 2000 feet along the coast.

Marine clouds have been stubborn to clear from pt reyes to san
mateo as well as around the south end of monterey bay with
persistent northwest winds. Current temperatures are running
seasonably cool with only mid 70s for the inland valleys.

In general high pressure will strengthen slightly tonight into
Thursday which should compress the marine layer and weaken onshore
flow. So if anything the inland valleys should notice a slight
warming trend through the end of the work week. As the marine
layer compresses nighttime fog may be dense at times near the
coast and coastal hills with early morning drizzle associated with
the night time marine intrusions.

The next upper trough arrives around 00z Saturday, which will
likely lead to a stronger seabreeze Friday evening with a
deepening of the marine layer. Latest 18z NAM actually spits out a
few hundredths of precip by 12z Saturday morning as a result of
local drizzle associated with a deep marine layer.

850 mb temps look to stay in the 21-24 celsius range though the
weekend and into early next week. So in what will likely be a long
holiday weekend for many people it looks like dry and seasonable
pattern with perhaps slight cooling trend towards july 4th. Quiet
summer pattern overall.

Aviation As of 10:47 am pdt Wednesday... For 18z tafs. 2000 ft
marine layer is holding strong this morning across much of the
immediate coastline along central california. Sfo and oak barely
scattered out yesterday, due to local effects of the marine layer,
before stratus built back in early yesterday evening. Today has
the potential to be similar. However, tafs do reflect clearing
(vfr) by 1830-19z at all terminals. Will monitor accordingly.

Breezy onshore winds again this afternoon, ranging from 10 to 20
kt, with occasional gusts over 20 kt at sfo. CIGS return early
again tonight.

Moderate confidence.

Vicinity of ksfo... Borderline ifr MVFR CIGS through 18-19z, but
could potentially be later.VFR anticipated by early afternoon.

Winds 15-20 kt, with gusts around 25 kt through early evening.

MVFR to ifr CIGS set to return around 04-05z, but will ultimately
depend on when if clearing occurs this afternoon.

Sfo bridge approach... Approach will clear before terminal,
sometime around 18-1830z.

Monterey bay terminals... Satellite shows nice clearing through the
salinas valley. Sns should be clear by 18z, followed by mry by
1830-19z. Moderate and occasionally gusty westerly winds this
afternoon, 10-15 kt on average. CIGS return by early evening or
late afternoon.

Marine As of 01:42 pm pdt Wednesday... Northerly winds will
continue to increase along the central coast as high pressure
builds off the coast. Gusty winds will result in hazardous sea
conditions with steep wind waves and fresh swell.

Mtr watches warnings advisories
Tngt Sca... Pigeon pt to pt pinos 0-10 nm
sca... Pt arena to pt reyes 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... Pt reyes to pigeon pt 0-10 nm until 3 am
sca... Mry bay until 9 pm
sca... Sf bay until 9 pm
public forecast: rww
aviation: bam
marine: bam
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
RTYC1 - 9414523 - Redwood City, CA 14 mi51 min WNW 9.9 G 13 68°F 72°F1012.8 hPa (-1.1)
FTPC1 - 9414290 - San Francisco, CA 21 mi51 min WSW 12 G 20 56°F 60°F1014.1 hPa (-1.0)
PXOC1 - 9414311 - San Francisco (Pier 1), CA 21 mi51 min SSW 5.1 G 15 60°F 1012.9 hPa (-0.9)
AAMC1 - 9414750 - Alameda, CA 21 mi51 min W 7 G 9.9 61°F 67°F1014.5 hPa (-0.9)
46237 - San Francisco Bar, CA (142) 21 mi51 min 57°F4 ft
PXSC1 21 mi51 min 60°F 54°F
OBXC1 22 mi51 min 59°F 54°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 22 mi51 min WSW 9.9 G 12
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 23 mi61 min NW 16 G 19 56°F 56°F7 ft1014.8 hPa (-0.4)
OKXC1 - 9414776 - Oakland (Berth 34), CA 23 mi51 min WNW 5.1 G 8.9 60°F 1014 hPa (-0.8)
LNDC1 23 mi51 min WSW 7 G 8.9 60°F 1014.1 hPa (-0.7)
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 26 mi61 min NW 18 G 19 55°F 56°F6 ft1014.5 hPa (+0.0)
TIBC1 - Tiburon Pier, San Francisco Bay, CA 27 mi59 min S 2.9 63°F 1014 hPa (-1.0)
PPXC1 - 9414847 - Richmond (Point Potrero), CA 29 mi51 min S 21 G 23 58°F 1013.7 hPa (-1.1)
RCMC1 - 9414863 - Richmond, CA 29 mi51 min S 8 G 11 61°F 64°F1013.1 hPa (-1.3)
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 40 mi51 min WSW 14 G 16 68°F 1011.9 hPa (-1.4)
MZXC1 - 9415102 - Martinez-Amorco CA 41 mi51 min WNW 11 G 15 75°F 71°F1012.1 hPa (-1.2)58°F
UPBC1 42 mi51 min WNW 11 G 14
PRYC1 - 9415020 - Point Reyes, CA 43 mi51 min NW 14 G 18 58°F 53°F1014.2 hPa (+0.0)
PCOC1 - 9415144 - Port Chicago, CA 45 mi51 min W 15 G 16 74°F 71°F1011.5 hPa (-1.4)
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 49 mi51 min NW 12 G 16 77°F 1010.9 hPa (-1.5)
46042 - MONTEREY - 27NM West of Monterey Bay, CA 49 mi61 min 58°F 59°F8 ft1014.5 hPa (-0.7)

Wind History for Redwood City, CA
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Half Moon Bay Airport, CA1 mi56 minNW 77.00 miOvercast57°F53°F88%1015.6 hPa
San Francisco, San Francisco International Airport, CA10 mi55 minW 1910.00 miA Few Clouds and Breezy64°F51°F63%1013.9 hPa
San Carlos Airport, CA12 mi64 minW 1110.00 miA Few Clouds70°F51°F53%1013.5 hPa
Palo Alto Airport, CA19 mi64 minNNW 1710.00 miClear70°F60°F73%1013.5 hPa
Oakland, Metro Oakland International Airport, CA20 mi58 minW 13 G 1910.00 miA Few Clouds67°F54°F63%1014.1 hPa
Hayward, Hayward Air Terminal, CA22 mi57 minWNW 108.00 miFair68°F52°F57%1014.7 hPa
Mountain View, Moffett Field, CA23 mi55 minN 1310.00 miFair68°F55°F65%1013.9 hPa

Wind History from HAF (wind in knots)
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Last 24hrNW11NW10NW11NW10NW12
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NW9NW9NW10NW8N7NW6NW8W3NW4W5W4NW6W5W5NW5NW6NW6NW8
1 day agoNW10NW10NW8NW7--NW9NW4NW7NW8NW7NW7N9NW8NW9NW9
G14
NW8N8NW9NW8NW9N11NW11NW11
G16
NW10
2 days ago--------------------------------CalmNW9NW8N4NW7NW7NW11NW10

Tide / Current Tables for Princeton, Half Moon Bay, California
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Princeton
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Wed -- 01:53 AM PDT     5.38 feet High Tide
Wed -- 05:51 AM PDT     Sunrise
Wed -- 08:45 AM PDT     -0.65 feet Low Tide
Wed -- 11:01 AM PDT     Moonrise
Wed -- 03:47 PM PDT     5.15 feet High Tide
Wed -- 08:35 PM PDT     Sunset
Wed -- 09:27 PM PDT     2.24 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.55.25.454.12.81.40.2-0.5-0.6-0.20.71.83.14.255.14.84.13.32.62.32.32.7

Tide / Current Tables for San Mateo Bridge, South San Francisco Bay, California Current
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San Mateo Bridge
Click for Map
Wed -- 01:47 AM PDT     1.36 knots Max Flood
Wed -- 04:55 AM PDT     -0.01 knots Slack
Wed -- 05:50 AM PDT     Sunrise
Wed -- 08:26 AM PDT     -1.84 knots Max Ebb
Wed -- 11:00 AM PDT     Moonrise
Wed -- 11:51 AM PDT     0.01 knots Slack
Wed -- 02:45 PM PDT     1.90 knots Max Flood
Wed -- 06:25 PM PDT     -0.00 knots Slack
Wed -- 08:34 PM PDT     Sunset
Wed -- 09:11 PM PDT     -1.11 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.61.21.31.10.6-0.1-0.8-1.4-1.8-1.7-1.3-0.70.21.11.81.91.71.20.4-0.4-0.9-1.1-1-0.7

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 (18,4,5,8)
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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.