Sunday, April26, 2015 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 6:17AMSunset 7:59PM Sunday April 26, 2015 6:01 AM PDT (13:01 UTC) Moonrise 12:23PMMoonset 1:24AM Illumination 53% Phase: First Quarter Moon; 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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PZZ540 Point Arena To Point Reyes To 10 Nm- 247 Am Pdt Sun Apr 26 2015
.small craft advisory in effect through late tonight...
Today..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 5 to 6 ft at 10 seconds.
Tonight..NW winds 15 to 25 kt. Wind waves 3 to 6 ft. NW swell 6 to 7 ft at 9 seconds.
Mon..NW winds 10 to 20 kt. Wind waves 2 to 4 ft. NW swell 5 to 7 ft at 9 seconds.
Mon night..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 5 to 7 ft at 11 seconds. Patchy fog after midnight.
Tue..NW winds 10 to 20 kt. Wind waves 2 to 4 ft. NW swell 6 to 8 ft at 11 seconds. Patchy fog in the morning.
Wed..NW winds 20 to 30 kt. Wind waves 4 to 7 ft. NW swell 10 to 12 ft.
Thu..NW winds 15 to 25 kt. Wind waves 3 to 6 ft. NW swell 9 to 12 ft.
PZZ500 247 Am Pdt Sun Apr 26 2015
Synopsis for the central california coast and bays including Monterey bay national marine sanctuaries.. A strengthening surface pressure gradient will result in increasing northerly winds today across the coastal waters. The strengthening winds will result in deteriorating sea conditions. Winds are anticipated to further strengthen midweek as a cold front pushes towards the california coast.

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 261017
afdmtr
area forecast discussion
national weather service san francisco bay area
317 am pdt Sun apr 26 2015

Synopsis High pressure will produce warm and dry conditions
today through Monday. Slight cooling will occur by the middle
of the week as a dry upper trough develops over northern
california.

Discussion As of 3:15 am pdt Sunday... Skies are mostly clear
this morning except for areas of stratocumulus forming where northwest
winds are impinging on higher terrain. Most clouds should clear by
late morning as warming occurs in the boundary layer and as the
flow aloft veers more to the north and brings in a drier airmass.

These developments... Plus airmass warming under a ridge building
just offshore... Will result in warmer weather across our region
today. The most significant warming today will occur inland where
highs will be 5 to 10 degrees warmer than yesterday. Although
onshore gradients have eased since yesterday... There is still a
nearly 12 mb gradient from sfo to las at the present time and that
gradient is forecast to ease only slightly today. Thus... Locally
brisk northwest winds will continue near the immediate coast
today... Which will limit the amount of coastal warming to about 5
degrees or less.

The warming trend will continue into Monday as the upper ridge
amplifies and shifts eastward over ca. High temperatures on Monday
will mostly be in the 70s... Except lower to mid 80s in the warmest
inland valleys. Skies should remain mostly clear through
Monday... Although the models indicate at least patchy night and
morning low clouds near the ocean... Particularly near the san
mateo county coast and southern monterey bay.

The upper ridge is forecast to be transitory and will move off to
our east by Tuesday... Allowing a trough over the eastern pacific
to approach the west coast by late Tuesday. Expect areas of low
clouds to increase along and near the coast by late Monday night
or Tuesday morning. In addition... Onshore flow will increase on
Tuesday. The result will be cooler conditions in most areas on
Tuesday... Especially coastal areas and in the coastal valleys.

Only the southern inland valleys are expected to remain warm into
Tuesday.

The upper trough that will settle in along the west coast by
midweek will be dry... And is not forecast to change the
temperature of the airmass over or area all that much.

Most of the modest cooling trend by midweek will be attributed to
an increase in onshore flow and temperatures will only cool back
to about normal. Temperatures are then expected to warm slightly
by the end of the week as the trough moves off to the east.

The longer range models agree in maintaining dry conditions across
our entire region through the first full week of may. In
addition... The CPC 8 to 14 day outlook indicates below normal
precipitation along the entire west coast. It's looking
increasingly likely that the rain we got Fri night/sat morning may
be the final rain event of the 2014-15 rain year.

Aviation As of 10:45 pm pdt Saturday... Satellite shows a few
small patches of low clouds around the area... Otherwise it's a mostly
clear evening. Gradually drier NW wind flow supportsVFR for the
period except local MVFR CIGS are still possible by early Sunday
morning as temperatures cool.

Vicinity of ksfo... Westerly winds have subsided through the
evening... But occasionally higher gusts to near 25 knots are still
possible through 10z.VFR should hold overnight into Sunday.

Sfo bridge approach... Similar to ksfo.

Monterey bay area terminals... 06z tafs carry similar forecast from
previous indicating few-sct cloud coverage for the overnight hours.

W-nw wind flow and nocturnal cooling could increase cloud coverage
a little more than forecast to produce patchy bkn-ovc coverage around
the monterey bay by morning. Low confidence forecast. Medium to high
confidenceVFR forecast for Sunday.

Marine As of 2:47 am pdt Sunday... Gusty northwest winds will
continue into Sunday with rough and choppy seas. Winds will turn
more northerly Sunday night through early next week as high
pressure builds and the pressure gradient strengthens near cape
mendocino.

Mtr watches/warnings/advisories
Tday Sca... Pigeon pt to pt pinos 0-10 nm
sca... Pt arena to pt reyes 10-60 nm
sca... Pt reyes to pigeon pt 10-60 nm
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
sca... Pigeon pt to pt pinos 10-60 nm
sca... Pt pinos to pt piedras blancas 10-60 nm
sca... Sf bay south of the bay bridge from 1 pm
sca... Monterey bay from 1 pm
public forecast: dykema
aviation: canepa
marine: larry
visit us at weather.Gov/sanfrancisco
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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 17 mi71 min NW 19 G 21 51°F 49°F6 ft1019.2 hPa (+0.3)
PRYC1 - 9415020 - Point Reyes, CA 18 mi31 min W 15 G 20 52°F 51°F1018.9 hPa
46214 - Point Reyes, CA (029) 33 mi51 min 51°F7 ft
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 35 mi71 min NW 21 G 27 52°F 51°F7 ft1018.9 hPa (+0.9)
46237 - San Francisco Bar, CA (142) 37 mi19 min 50°F6 ft
RCMC1 - 9414863 - Richmond, CA 38 mi31 min NW 5.1 G 8 54°F 58°F1018.5 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 40 mi31 min NW 4.1 G 6 54°F 1018.9 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 40 mi31 min NW 12 G 14 55°F 1018.5 hPa
FTPC1 - 9414290 - San Francisco, CA 41 mi31 min S 4.1 G 5.1 52°F 56°F1018.9 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 44 mi31 min WNW 6 G 11 54°F 1017.7 hPa
PXSC1 44 mi31 min 55°F 41°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 46 mi31 min NW 7 G 12 55°F 1018.8 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 46 mi31 min NW 8.9 G 12
UPBC1 48 mi31 min WNW 11 G 16
MZXC1 - 9415102 - Martinez-Amorco CA 48 mi31 min W 13 G 17 54°F 61°F1017.5 hPa43°F
AAMC1 - 9414750 - Alameda, CA 49 mi31 min NNW 4.1 G 9.9 55°F 62°F1018.2 hPa
LNDC1 49 mi31 min NNW 5.1 G 8 54°F 1018.6 hPa

Wind History for Point Reyes, CA
(wind in knots)    EDIT      (on/off)   Help
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W9
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G26
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G28
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G29
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G28
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NW15
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G27
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W18
G22
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G17
W15
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G18
W11
G17
W4
G7
W2
G5
E3
G10
NW6
G10
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G13
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G18
W11
G16
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G15
W9
G15
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2 days
ago
NW18
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NW13
G17
NW9
G12
E5
SE3
G7
SE3
NW11
NW15
NW14
G18
NW18
G23
W23
G29
W20
G26
W27
G38
W29
G36
W21
G26
W17
G22
W19
G24
W19
W19
W19
G25

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Santa Rosa, Santa Rosa Sonoma County Airport, CA20 mi68 minN 510.00 miFair49°F39°F69%1017.7 hPa
Petaluma Municipal Airport, CA20 mi66 minWNW 710.00 miMostly Cloudy46°F41°F82%1019.3 hPa
Novato / Gnoss Field, CA24 mi66 minN 710.00 miFair48°F41°F76%1018.6 hPa

Wind History from O69 (wind in knots)
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Last 24hrW7W8W7W8NW3W8W9W10
G14
W11W12
G19
W11
G18
W11
G19
W12
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W12
G17
NW6NW4NW3W9NW7W6W9W7W7W6
1 day agoNW6NW8W8W10W10W14W16
G25
W19
G24
W16
G25
W22
G31
W20
G28
W13
G19
NW8W7W7N3E3E5W9
G16
W12
G23
W8
G15
W8
G15
W7
G14
Calm
2 days agoCalmCalmCalmCalmSE5S4CalmW8W13
G17
N5W8W8
G14
W7W4W7W6W9
G17
NW4NW8
G15
NW6NW4N4NW3W8

Tide / Current Tables for Tomales Bay entrance, California
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Tomales Bay Entrance
Click for Map
Sun -- 12:57 AM PDT     2.18 feet Low Tide
Sun -- 02:23 AM PDT     Moonset
Sun -- 06:08 AM PDT     3.66 feet High Tide
Sun -- 06:21 AM PDT     Sunrise
Sun -- 01:18 PM PDT     0.22 feet Low Tide
Sun -- 01:23 PM PDT     Moonrise
Sun -- 07:58 PM PDT     Sunset
Sun -- 08:17 PM PDT     3.83 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.32.22.32.73.13.53.73.63.22.61.91.10.50.20.30.81.52.33.13.63.83.83.43

Tide / Current Tables for Point Reyes, California Current
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Point Reyes
Click for Map
Sun -- 01:51 AM PDT     0.00 knots Slack
Sun -- 02:23 AM PDT     Moonset
Sun -- 04:31 AM PDT     0.46 knots Max Flood
Sun -- 06:22 AM PDT     Sunrise
Sun -- 07:02 AM PDT     -0.00 knots Slack
Sun -- 10:02 AM PDT     -0.86 knots Max Ebb
Sun -- 01:23 PM PDT     Moonrise
Sun -- 02:13 PM PDT     0.00 knots Slack
Sun -- 05:34 PM PDT     0.83 knots Max Flood
Sun -- 07:58 PM PDT     Sunset
Sun -- 08:29 PM PDT     -0.00 knots Slack
Sun -- 11:42 PM PDT     -0.60 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.4-0.300.30.40.50.30-0.4-0.8-0.9-0.8-0.7-0.5-0.10.30.60.80.80.60.2-0.2-0.5-0.6

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 (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.