Wednesday, May4, 2016 L-36.com


Marine Weather and Tides
Dillon Beach, CA

Version 3.4
What's New / NOTES
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.
1/11/2015 - Updated Marine Zones because NOAA split some zones on the East Coast. You may need to edit or your forecast section.

Sunrise 6:07AMSunset 8:07PM Wednesday May 4, 2016 10:23 AM PDT (17:23 UTC) Moonrise 3:58AMMoonset 4:52PM Illumination 5% 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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PZZ540 Point Arena To Point Reyes To 10 Nm- 918 Am Pdt Wed May 4 2016
Today..W winds 5 to 15 kt...becoming S in the afternoon. Wind waves 3 to 4 ft. Mixed swell nw 4 to 6 ft at 11 seconds and S 3 ft at 14 seconds. Slight chance of showers through the day.
Tonight..SE winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 6 to 7 ft at 10 seconds and S 3 ft at 14 seconds. Slight chance of showers in the evening...then chance of showers after midnight.
Thu..S winds 10 kt. Wind waves 2 ft or less. NW swell 6 to 8 ft at 10 seconds and S 3 ft at 14 seconds. Slight chance of showers in the morning...then chance of showers and slight chance of Thunderstorms in the afternoon.
Thu night..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 6 to 8 ft at 10 seconds and S 3 ft at 14 seconds. Slight chance of showers through the night.
Fri..NW winds 15 to 25 kt...becoming W 10 kt. Wind waves 3 to 4 ft...becoming 2 ft or less. NW swell 7 to 9 ft at 10 seconds. Slight chance of showers.
Sat..W winds 10 kt. Wind waves 2 ft or less. NW swell 6 to 8 ft. Slight chance of showers.
Sun..W winds 10 kt. Wind waves 2 ft or less. NW swell 5 to 6 ft.
PZZ500 918 Am Pdt Wed May 4 2016
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... An upper low in the area will bring moderate northerly winds in the outer waters north of pt reyes. Lighter southwest winds will prevail south of pt reyes. Thunderstorms will also be possible due to cold unstable air. Winds and seas will gradually increase late this week.

7 Day Forecast for Marine Location Near Dillon Beach, CA
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location: 38.25, -122.98     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 041537
afdmtr
area forecast discussion
national weather service san francisco bay area
837 am pdt Wed may 4 2016

Synopsis Cloudy and cool today as an upper low approaches and
produces some north bay showers. Chance of showers continues
overnight into Thursday along with a isolated thunderstorms as the
upper low wobbles around the central coast. Shower and isolated
thunderstorm threat continues into Friday and likely Saturday as
the slow moving low impacts the state with continued below normal
temperatures. Drying and warming trend starts Sunday and continues
into early next week.

Discussion As of 08:36 am pdt Wednesday... A mix of low and
high clouds continue to spread across the region this morning
ahead of a developing mid/upper level system off the coast.

Moisture associated with this system has resulted in a few light
rain showers over portions of the north bay and east bay this
morning. Overall, rainfall amounts have generally been less than
0.05" per hour. Do expect isolated to scattered showers through
the day as the upper level low remains offshore. In looking at the
latest short-range models, have added a slight chance of
thunderstorms to the official forecast for this afternoon. With
that said, do not expect widespread rainfall or thunderstorms
today as most of the activity will be spotty in nature. Otherwise,
the rest of the forecast remains on track. Please see previous
forecast discussion for more details.

Prev discussion As of 3:42 am pdt Wednesday... It looks like
cloud city this morning with low stratus near the coast and
plenty of mid and high clouds streaming over the region in advance
of the incoming upper low. Radar showing a few high returns
offshore and over the north bay... Likely virga or a few spits of
light rain. Latest hrrr and rap runs suggest the best chance for
any showers today will be over the north bay and during the
afternoon as the low gets closer. Main theme for today will be
cloudy conditions with highs generally in the 60s to lower 70s.

Upper low will slowly approach the region and then drop west of
the central coast on Thursday. Gradients are light so no strong
winds of note. Continued cloudy with scattered shower chances
continuing across the region. Again most showers will be light and
due to convective nature many areas will not see rainfall on
Thursday. In fact latest 06z NAM shows most of the shower activity
forming over the higher terrain on Thursday afternoon which is
when we'll have a better chance of some isolated t-storms as well.

The core of the upper low and cold air aloft stays offshore so
looks like we wont see the best instability on Thursday and if the
abundant cloud cover persists that will inhibit instability as
well.

As the upper low heads towards pt conception on Friday morning
the models are painting more stratiform but light type precip
rotating around the upper low... Especially from the bay area
southward. Given the subtle run to run changes it remains
difficult to pinpoint exactly where rain will fall with many
locations likely remaining dry through the period... However Friday
is looking like the day that may need the highest pops.

06z NAM and GFS runs show another deformation band rotating from
the northeast part of the state towards the bay area on Saturday
keeping the chance of showers in the forecast along with the below
normal daytime highs in the 60s. So we have legitimate but low end
precip chances the next four days with higher confidence for below
normal temps the rest of the week and into the weekend. Rain
totals by Saturday could exceed 0.50 in some of the wetter spots
but on average totals should be more around a tenth or two.

Shower threat should finally end by Saturday night followed by a
gradual warming and drying trend Sunday through early next week.

Aviation As of 4:34 am pdt Wednesday... Tough and low confidence
forecast this morning as an upper level trough off the coast
creeps eastward. The trough is bringing a mixed bag of CIGS this
morning with vcsh passing through. CIGS range from ifr toVFR and
are very transient. Do expect any CIGS this morning to gradually
lift as the trough approaches. Will keep vcsh for the tafs given
the uncertainty. CIGS return tonight.

Vicinity of ksfo...VFR to MVFR CIGS through this morning. Better
chc for CIGS over the east bay-koak. Covering some patchy CIGS at
ksfo with a temp this morning.VFR this afternoon with breezy
conditions.

Sfo bridge approach... Similar as ksfo.

Monterey bay terminals... Ifr CIGS this morning... Gradually
lifting.VFR this afternoon with vcsh.

Marine As of 03:20 am pdt Wednesday... An approaching storm
system will bring unsettled weather to the region into the
weekend. Thunderstorms will also be possible due to cold unstable
air. Winds and seas will gradually increase late this week.

Mtr watches/warnings/advisories
Tday Sca... Pt arena to pigeon pt 10-60 nm
sca... Sf bay from 1 pm
public forecast: rgass
aviation: mm
marine: mm
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BDXC1 7 mi35 min 52°F
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 17 mi33 min SSE 3.9 G 5.8 53°F 53°F5 ft1011.6 hPa (+0.3)
PRYC1 - 9415020 - Point Reyes, CA 18 mi53 min SE 2.9 G 8 59°F 52°F1011.7 hPa
46214 - Point Reyes, CA (029) 33 mi61 min 57°F7 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 35 mi33 min SSE 5.8 G 5.8 53°F 52°F4 ft1012 hPa (+0.0)
46237 - San Francisco Bar, CA (142) 37 mi61 min 53°F4 ft
RCMC1 - 9414863 - Richmond, CA 38 mi53 min S 5.1 G 7 57°F 58°F1011.8 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 40 mi53 min SSW 8.9 G 12 57°F 1012.2 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 40 mi53 min WSW 13 G 16 58°F 1011.3 hPa
FTPC1 - 9414290 - San Francisco, CA 41 mi53 min WSW 4.1 G 7 56°F 55°F1012.4 hPa
FPXC1 41 mi36 min 55°F
CQUC1 42 mi46 min 63°F
PXSC1 44 mi53 min 58°F 52°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 44 mi65 min W 4.1 G 8 58°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 46 mi95 min SSW 4.1 G 6 57°F 1012 hPa
UPBC1 48 mi53 min WNW 7 G 8.9
MZXC1 - 9415102 - Martinez-Amorco CA 48 mi53 min W 5.1 G 8 61°F 64°F1010.5 hPa53°F
LNDC1 49 mi53 min WSW 6 G 8 57°F 1012.1 hPa
AAMC1 - 9414750 - Alameda, CA 49 mi53 min W 4.1 G 6 59°F 63°F1012.3 hPa

Wind History for Point Reyes, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Santa Rosa, Santa Rosa Sonoma County Airport, CA20 mi30 minSSE 410.00 miMostly Cloudy57°F53°F87%1010.7 hPa
Petaluma Municipal Airport, CA20 mi28 minWNW 47.00 miA Few Clouds59°F53°F82%1012.5 hPa
Novato / Gnoss Field, CA24 mi28 minN 010.00 miA Few Clouds61°F53°F77%1011.8 hPa

Wind History from O69 (wind in knots)
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Last 24hrNW3W6W6NW5NW4NW5NW5NW8NW6NW4NW4NW3NW3NW4NW5NW4N4NW5NW5NW4--SW5NW5W5
1 day agoNW3N3NW4W4W12NW7NW9
G14
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W10W6NW8NW5NW4NW4W6W8NW5W4----NW4W5W7NW5
2 days agoE3SE3S7--S9SE3NW7NW6NW7NW7NW3NW3NW4--------NW3W6NW5W5NW3NW3W5

Tide / Current Tables for Tomales Bay entrance, California
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Tomales Bay Entrance
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Wed -- 04:24 AM PDT     0.04 feet Low Tide
Wed -- 04:58 AM PDT     Moonrise
Wed -- 06:11 AM PDT     Sunrise
Wed -- 10:21 AM PDT     4.13 feet High Tide
Wed -- 04:17 PM PDT     0.41 feet Low Tide
Wed -- 05:51 PM PDT     Moonset
Wed -- 08:06 PM PDT     Sunset
Wed -- 10:30 PM PDT     5.32 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.72.61.50.60.10.10.71.72.83.64.143.52.61.60.80.40.51.22.33.54.65.25.2

Tide / Current Tables for Point Reyes, California Current
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Point Reyes
Click for Map
Wed -- 01:30 AM PDT     -1.38 knots Max Ebb
Wed -- 04:58 AM PDT     Moonrise
Wed -- 05:12 AM PDT     0.00 knots Slack
Wed -- 06:11 AM PDT     Sunrise
Wed -- 08:07 AM PDT     1.19 knots Max Flood
Wed -- 11:13 AM PDT     -0.00 knots Slack
Wed -- 01:53 PM PDT     -1.20 knots Max Ebb
Wed -- 05:20 PM PDT     0.00 knots Slack
Wed -- 05:51 PM PDT     Moonset
Wed -- 08:06 PM PDT     Sunset
Wed -- 08:16 PM PDT     1.20 knots Max Flood
Wed -- 11:17 PM PDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.9-1.3-1.3-1.1-0.7-0.10.511.21.10.70.2-0.5-1.1-1.2-1-0.7-0.20.40.91.21.10.80.2

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 (13,3,4,5)
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Ground Weather Radar Station Sacramento, 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.