Wednesday, May24, 2017 L-36.com


Marine Weather and Tides
Lagunitas-Forest Knolls, CA

Version 3.4
What's New / NOTES
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 8:23PM Wednesday May 24, 2017 6:35 AM PDT (13:35 UTC) Moonrise 4:21AMMoonset 6:13PM Illumination 1% Phase: Waning Crescent; Moon at 28 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- 309 Am Pdt Wed May 24 2017
.small craft advisory in effect from late tonight through late Thursday night...
Today..SW winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 3 to 5 ft at 12 seconds. Patchy fog in the morning. Patchy drizzle in the morning.
Tonight..S winds 10 to 20 kt. Wind waves 2 to 4 ft. NW swell 4 to 5 ft at 11 seconds.
Thu..S winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 4 to 5 ft at 11 seconds.
Thu night..S winds 10 to 20 kt. Wind waves 2 to 4 ft. NW swell 4 to 5 ft at 11 seconds.
Fri..SW winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 3 to 5 ft at 10 seconds.
Sat..NW winds 10 kt. Wind waves 2 ft or less. NW swell 3 to 4 ft.
Sun..NW winds 10 to 20 kt. Wind waves 2 to 4 ft. NW swell 3 ft.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...combined seas 3 to 5 ft with a period of 14 seconds. Across the bar...combined seas 4 to 6 ft with a period of 14 seconds. Maximum ebb current of 1.1 knots at 02:54 pm Wednesday and 2.1 knots at 03:00 am Thursday.
PZZ500 309 Am Pdt Wed May 24 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Increasing southerly winds along the coast today. Surface high pressure bringing northerly winds further offshore north of point reyes. A small northwest swell moves through the water this week.

7 Day Forecast for Marine Location Near Lagunitas-Forest Knolls CDP, CA
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location: 37.98, -122.74     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 241131
afdmtr
area forecast discussion
national weather service san francisco bay area
431 am pdt Wed may 24 2017

Synopsis A cooling trend can be expected through Friday as
high pressure weakens and the marine influence increases. Minor
warming is then expected during the upcoming weekend into early
next week as high pressure returns to the west coast.

Discussion As of 3:30 am pdt Wednesday... Another round of
widespread clouds at the coast plus through most of the salinas
valley and into much of san francisco bay. Marine layer continues
to be around 1,500 feet along with a moderate onshore flow (sfo-
sac gradient over 3 mb) at the surface. Clouds will burn-off
toward the coast later this morning although similar to the past
few days, some locals beaches will not see any sunshine.

Biggest change compared to yesterday will be cooler conditions
inland as an upper level low and associated longwave trough
continue to dive southward into the northern rockies. Highs will
only be in the 70s to the lower 80s for inland locations with
upper 50s to upper 60s closer to the coast. The influx of cooler
air will lead to breezy conditions during the afternoon. Another
round of coastal clouds can be expected tonight.

Additional inland cooling is forecast for Thursday and Friday as
the trough dives farther to the south. Far inland spots will
struggle to get into the 70s while coastal areas will be in the
mid 50s to the mid 60s.

A ridge of high pressure will rebuild across our region starting
on Saturday and continuing at least into Monday. Many inland
locations will return to the upper 70s to around 90. Clouds along
with a continued onshore flow will keep towns near the coast
considerably cooler.

No sign of rainfall through the first week of june.

Aviation As of 4:30 am pdt Wednesday... Deep stratus intrusion
this morning, bringing widespread vlifr to ifr CIGS to most taf
sites. Generally speaking, marine layer is both deeper and has
lower ceilings this morning and will take longer to mix out today
versus yesterday. Some locations, ie along immediate coast such as
khaf and kmry will likely remain ovc010 or less through the entire
day. Otherwise, increasing west to southwest winds along the
coast becoming breezy to occasionally gusty in the
afternoon evening.

Vicinity of ksfo... Ifr to MVFR CIGS thru the mid morning, mixing
out toVFR between 18-19z. Tower will have better conditions than
the bridge which could impact approach until late morning. W-sw
winds up to 15kt with gusts to the low 20kts.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Stratus through the day along the coast,
with mixing out by mid to late morning further inland. Breezy
southwest winds through the afternoon and evening. Ceilings down
to 200-300 ft this morning tonight.

Marine As of 04:25 am pdt Wednesday... Increasing southerly
winds along the coast today. Surface high pressure bringing
northerly winds further offshore north of point reyes. A small
northwest swell moves through the water this week.

Mtr watches warnings advisories
Tday Sca... Pt arena to pigeon pt 10-60 nm
sca... Sf bay from 9 am
public forecast: bell
aviation: drp
marine: drp
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
PRYC1 - 9415020 - Point Reyes, CA 13 mi48 min WSW 2.9 G 6 54°F 57°F1011.1 hPa
46237 - San Francisco Bar, CA (142) 15 mi66 min 53°F4 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 16 mi46 min SSW 3.9 G 5.8 51°F 53°F4 ft1011.8 hPa (-1.2)
TIBC1 - Tiburon Pier, San Francisco Bay, CA 17 mi54 min ESE 7 51°F 1012 hPa
RCMC1 - 9414863 - Richmond, CA 18 mi48 min SSW 5.1 G 8 53°F 59°F1011.3 hPa
FTPC1 - 9414290 - San Francisco, CA 19 mi48 min SW 5.1 G 8.9 50°F 55°F1011.9 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 21 mi48 min SSW 6 G 9.9 53°F 1011.7 hPa
PXSC1 22 mi48 min 51°F 51°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 22 mi54 min W 5.1 G 8.9 51°F 1010.7 hPa
OBXC1 24 mi48 min 52°F 52°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 25 mi48 min WSW 7 G 8.9
OKXC1 - 9414776 - Oakland (Berth 34), CA 25 mi48 min W 8 G 11 52°F 1011.7 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 26 mi48 min SW 14 G 17 54°F 1010.6 hPa
LNDC1 27 mi48 min W 5.1 G 8 52°F 1011.6 hPa
AAMC1 - 9414750 - Alameda, CA 27 mi48 min W 5.1 G 8.9 52°F 65°F1012.1 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 33 mi48 min W 13 G 16 53°F 64°F1010.9 hPa53°F
UPBC1 33 mi48 min W 16 G 23
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 35 mi36 min ESE 3.9 G 7.8 50°F 1011.9 hPa (-1.2)50°F
PCOC1 - 9415144 - Port Chicago, CA 38 mi48 min SW 17 G 21 52°F 65°F1010.2 hPa
46214 - Point Reyes, CA (029) 39 mi36 min 51°F6 ft
SFXC1 - San Francisco Bay Reserve, CA 41 mi111 min WNW 8.9 53°F 1010 hPa51°F
RTYC1 - 9414523 - Redwood City, CA 43 mi48 min WNW 5.1 G 6 55°F 70°F1010.9 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 43 mi46 min WSW 3.9 G 5.8 52°F 53°F4 ft1011.5 hPa (-1.3)
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 45 mi48 min WNW 18 G 24 55°F 1008.8 hPa

Wind History for Point Reyes, CA
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Novato / Gnoss Field, CA15 mi61 minSW 410.00 miOvercast54°F50°F88%1011.5 hPa
Petaluma Municipal Airport, CA20 mi41 minW 87.00 miOvercast50°F50°F100%1011.8 hPa

Wind History from DVO (wind in knots)
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Last 24hrNW5N7N443N7N10N9NW7
G15
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N12N12N10
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N9N11N6NW6NW4NW7N6SE5CalmCalmCalm
1 day agoN6N5N5CalmCalmCalm334N12N12N10N12N10N10N10N9--N8N8N9N6N8N7
2 days agoN5CalmCalmCalmCalm5Calm6NE6N8N10N10N11N4
G10
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Tide / Current Tables for Bolinas Lagoon, California
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Bolinas Lagoon
Click for Map
Wed -- 05:20 AM PDT     Moonrise
Wed -- 05:37 AM PDT     -0.51 feet Low Tide
Wed -- 05:53 AM PDT     Sunrise
Wed -- 11:40 AM PDT     3.34 feet High Tide
Wed -- 05:25 PM PDT     0.88 feet Low Tide
Wed -- 07:12 PM PDT     Moonset
Wed -- 08:21 PM PDT     Sunset
Wed -- 11:01 PM PDT     4.59 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.831.90.90-0.4-0.500.81.82.63.23.332.51.81.20.911.62.53.54.34.6

Tide / Current Tables for Point Reyes, California Current
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Point Reyes
Click for Map
Wed -- 02:16 AM PDT     -1.61 knots Max Ebb
Wed -- 05:22 AM PDT     Moonrise
Wed -- 05:54 AM PDT     Sunrise
Wed -- 06:03 AM PDT     0.00 knots Slack
Wed -- 09:02 AM PDT     1.31 knots Max Flood
Wed -- 12:19 PM PDT     -0.00 knots Slack
Wed -- 02:45 PM PDT     -1.05 knots Max Ebb
Wed -- 06:00 PM PDT     0.00 knots Slack
Wed -- 07:14 PM PDT     Moonset
Wed -- 08:23 PM PDT     Sunset
Wed -- 08:55 PM PDT     1.12 knots Max Flood
Wed -- 11:49 PM PDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.6-1.3-1.6-1.5-1.2-0.7-00.61.11.31.20.80.2-0.5-0.9-1-0.8-0.5-00.511.10.90.5

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 (9,2,3,4)
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Ground Weather Radar Station Sacramento, 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.