Saturday, June24, 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 5:47AMSunset 8:38PM Saturday June 24, 2017 3:15 AM PDT (10:15 UTC) Moonrise 5:38AMMoonset 8:19PM Illumination 0% Phase: New Moon; Moon at 0 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- 854 Pm Pdt Fri Jun 23 2017
Tonight..SW winds 10 kt. Wind waves 2 ft or less. NW swell 3 to 4 ft at 10 seconds. Patchy fog after midnight.
Sat..W winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 3 ft at 9 seconds and sw 3 ft at 16 seconds. Patchy fog in the morning.
Sat night..W winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 3 ft at 8 seconds. Patchy fog after midnight.
Sun..W winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 3 ft at 8 seconds. Patchy fog in the morning.
Sun night..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 3 ft at 8 seconds and sw 3 ft at 16 seconds.
Mon..W winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 3 ft.
Tue..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 3 ft.
Wed..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 4 to 6 ft. Patchy fog.
...san francisco bar/fourfathom bank forecast..... In the deep water channel...combined seas 3 to 5 ft with a dominant swell period of 15 seconds. Across the bar...combined seas 4 to 6 ft with a dominant swell period of 15 seconds. Maximum ebb current of 2.2 knots at 03:24 am Saturday and 1 knots at 04:30 pm Saturday.
PZZ500 854 Pm Pdt Fri Jun 23 2017
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... An upper level weather disturbance off the southern california coast will move north tonight, potentially producing isolated Thunderstorms over the southern coastal waters late tonight and Saturday. Otherwise, light southerly winds will continue over the coastal waters tonight before turning westerly and northwesterly and increasing slightly by Saturday afternoon. Wave heights and swell will decrease through the coming days.

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 240540
afdmtr
area forecast discussion
national weather service san francisco bay area
1040 pm pdt Fri jun 23 2017

Synopsis Cooling trend started today for most areas as onshore
flow returns. The far interior valleys will remain seasonably
warm through this evening. The overall trend this weekend and into
next week will be a return to more seasonable temperatures along
with more extensive night and morning low clouds followed by sunny
afternoons.

Discussion As of 8:40 pm pdt Friday... Temperatures cooled
considerably over the last 24 hours as the marine layer gradually
deepened and onshore flow returned. Most locations cooled anywhere
from 5 to 15 degrees with a couple locations dropping as much as
20 degrees from yesterday. High temperatures topped out in the mid
60s to low 70s along the coast, mid 70s to low 80s around the bay
and mid 80s to low 90s over the interior. A few locations managed
to soar into the 100 to 108 range over the warmest southern
interior valleys of monterey and san benito counties. Temperatures
have cooled since this afternoon and with the trend toward cooler
temperatures for Saturday the heat advisory for the interior
portions of the east bay, santa clara county and the mountain of
monterey and san benito counties will be allowed to expire at 9 pm
tonight.

The cooling trend will continue through the next few days with
temperatures falling on average 3 to 5 degrees each day through
the weekend and into early next week. Coastal areas will see
little change while inland temperatures will see larger changes as
cooler marine air reaches farther inland. No heat advisories are
anticipated through the weekend.

Low clouds and patchy fog will also return to the region this
weekend as an approaching upper level trough deepens the marine
layer. Patchy drizzle will also be likely by Monday as the trough
axis moves across the district.

From previous discussion... One major change to the forecast was
to include a slight chance of thunderstorms over monterey san
benito late tonight into Saturday. Confidence is rather low, but
if it verifies impacts could be huge, especially from a fire
weather perspective. For several days now, models have been keying
in on the moisture convection near baja tracking north. Latest
models do bring the mid-upper level moisture (700-500mb) northward
tonight and early Saturday. In addition to the moisture
advection, upper level instability increases. Mu CAPE through the
layer increases with modified total totals greater than 30 all
indicating upper level lift. At this point only giving it a 15 pct
chance of occurring, but still wanted to add it to the forecast.

Medium and longer range models still indicate later next week and
towards the end of the month show more pronounced ridging with
potential for another round of weak offshore flow and associated
warming. CPC has the 6-10 forecast above normal temps for ca.

Aviation As of 10:40 pm pdt Friday... For 06z tafs. Widespread
ifr ceilings will develop overnight and continue into Saturday
morning. Local lifr ceilings and ifr vsbys are also likely.

Vfr conditions expected to return to most terminals by 18z
Saturday. A weak upper level disturbance approaching from the
south late tonight and Saturday morning will produce some mid high
level clouds and may also trigger isolated thunderstorms near the
coast. Look for similar return time for low clouds on Saturday
evening, possibly a few hours earlier.

Forecast confidence: moderate
vicinity of ksfo...VFR conditions expected to persist at ksfo
until about 10z, with ifr ceilings then forecast from about 10-17z.

Westerly winds increasing to around 20 knots on Saturday
afternoon.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals... Ifr lifr ceilings overnight and into
early Saturday along with patchy MVFR vsbys. Low clouds expected
to clear by 17z Saturday at ksns but probably a couple of hours
later at kmry. Mid level clouds late tonight and Saturday with a
potential for isolated thunderstorms, but thunderstorm potential
is highest offshore.

Marine As of 8:54 pm pdt Friday... An upper level weather
disturbance off the southern california coast will move north
tonight, potentially producing isolated thunderstorms over the
southern coastal waters late tonight and Saturday. Otherwise,
light southerly winds will continue over the coastal waters
tonight before turning westerly and northwesterly and increasing
slightly by Saturday afternoon. Wave heights and swell will
decrease through the coming days.

Mtr watches warnings advisories
Tngt Sca... Sf bay until 11 pm
public forecast: cw
aviation: dykema
marine: dykema
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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 mi45 min NW 1.9 G 2.9 58°F 60°F1013.9 hPa
46237 - San Francisco Bar, CA (142) 15 mi45 min 56°F4 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 16 mi85 min W 1.9 G 3.9 56°F 56°F4 ft1014.5 hPa (+0.0)
TIBC1 - Tiburon Pier, San Francisco Bay, CA 17 mi48 min SSW 6 56°F 1014 hPa
RCMC1 - 9414863 - Richmond, CA 18 mi45 min SSW 2.9 G 7 58°F 62°F1013.6 hPa
FTPC1 - 9414290 - San Francisco, CA 19 mi45 min WNW 1.9 G 7 56°F 56°F1014.2 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 21 mi45 min SW 4.1 G 5.1 59°F 1014.1 hPa
PXSC1 22 mi45 min 58°F 57°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 22 mi51 min W 6 G 9.9 57°F 1013.1 hPa
OBXC1 24 mi45 min 58°F 57°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 25 mi45 min WSW 8 G 9.9
OKXC1 - 9414776 - Oakland (Berth 34), CA 25 mi45 min W 7 G 9.9 58°F 1014 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 26 mi45 min WSW 9.9 G 13 60°F 1013.2 hPa
LNDC1 27 mi51 min W 6 G 8.9 58°F 1014.1 hPa
AAMC1 - 9414750 - Alameda, CA 27 mi45 min W 5.1 G 7 58°F 65°F1014.5 hPa
MZXC1 - 9415102 - Martinez-Amorco CA 33 mi45 min W 13 G 17 59°F 68°F1013.4 hPa59°F
UPBC1 33 mi45 min W 18 G 21
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 35 mi35 min NNW 1.9 G 3.9 54°F 53°F1014.5 hPa54°F
PCOC1 - 9415144 - Port Chicago, CA 38 mi45 min WSW 18 G 23 59°F 72°F1012.6 hPa
46214 - Point Reyes, CA (029) 39 mi45 min 54°F7 ft
SFXC1 - San Francisco Bay Reserve, CA 41 mi90 min W 14 60°F 1011 hPa56°F
RTYC1 - 9414523 - Redwood City, CA 43 mi45 min NW 6 G 7 61°F 75°F1013.4 hPa
46012 - HALF MOON BAY - 24NM South Southwest of San Francisco, CA 43 mi85 min WSW 1.9 G 3.9 56°F 55°F6 ft1014 hPa (+0.0)
PSBC1 - 9415115 - Pittsburg (Suisun Bay), CA 45 mi45 min WNW 20 G 26 62°F 1010.7 hPa

Wind History for Point Reyes, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Novato / Gnoss Field, CA15 mi20 minNW 410.00 miMostly Cloudy55°F53°F94%1013.9 hPa
Petaluma Municipal Airport, CA20 mi20 minNW 64.00 miFog/Mist55°F55°F100%1014.2 hPa

Wind History from DVO (wind in knots)
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Last 24hr4N4N5N9N9N8N7N8N8NE9N11N14
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N10N10N9NW10NW4--
1 day agoCalmCalmN5N4CalmCalmCalmCalm4SE6SE8N7N11N10N14N14N12N10N10N9N8CalmN6NW4
2 days agoS3CalmCalmS3CalmCalmCalmCalm4SE5465N12N11N9N9NE9CalmNE5N5N6N3Calm

Tide / Current Tables for Bolinas Lagoon, California
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Bolinas Lagoon
Click for Map
Sat -- 05:49 AM PDT     Sunrise
Sat -- 06:37 AM PDT     Moonrise
Sat -- 06:58 AM PDT     -1.07 feet Low Tide
Sat -- 01:23 PM PDT     3.57 feet High Tide
Sat -- 06:48 PM PDT     1.39 feet Low Tide
Sat -- 08:36 PM PDT     Sunset
Sat -- 09:18 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.84.33.42.20.9-0.2-0.9-1.1-0.7012.133.53.53.12.51.91.51.41.82.63.54.4

Tide / Current Tables for Point Reyes, California Current
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Point Reyes
Click for Map
Sat -- 12:13 AM PDT     -0.00 knots Slack
Sat -- 03:33 AM PDT     -1.84 knots Max Ebb
Sat -- 05:50 AM PDT     Sunrise
Sat -- 06:39 AM PDT     Moonrise
Sat -- 07:26 AM PDT     0.00 knots Slack
Sat -- 10:30 AM PDT     1.46 knots Max Flood
Sat -- 01:54 PM PDT     -0.00 knots Slack
Sat -- 04:11 PM PDT     -0.92 knots Max Ebb
Sat -- 07:19 PM PDT     0.00 knots Slack
Sat -- 08:38 PM PDT     Sunset
Sat -- 09:20 PM PDT     Moonset
Sat -- 10:12 PM PDT     1.06 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.1-0.6-1.3-1.8-1.8-1.5-1-0.30.41.11.41.41.10.6-0.1-0.7-0.9-0.8-0.5-0.20.30.81.11

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 (6,6,7,8)
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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.