Thursday, October2, 2014 L-36.com


Marine Weather and Tides
Dillon Beach, CA

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6/17/2014 - I reported slow load times to NOAA and they quickly resolved the problem. Sorry for any inconvience. NOAA had some stuck processes on two servers. This was a problem on 5 to 10% of the requests.
6/10/2014 - Marine Zones updated. Some zones have changed. Edit your Marine Forecast section to check.

Sunrise 7:06AMSunset 6:53PM Wednesday October 1, 2014 11:22 PM PDT (06:22 UTC) Moonrise 1:09PMMoonset 11:36PM Illumination 58% 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- 903 Pm Pdt Wed Oct 1 2014
Tonight..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. NW swell 5 to 7 ft at 10 seconds.
Thu..E winds 5 kt...becoming sw in the afternoon. Wind waves 2 ft or less. NW swell 4 to 6 ft at 9 seconds.
Thu night..NW winds 10 kt. Wind waves 2 ft or less. Mixed swell nw 2 to 4 ft at 8 seconds and sw 3 ft at 14 seconds.
Fri..NW winds 5 kt. Wind waves 2 ft or less. Mixed swell nw 3 to 5 ft at 8 seconds and sw 3 ft at 14 seconds.
Fri night..NW winds 10 kt. Wind waves 2 ft or less. W swell 2 to 3 ft at 13 seconds and sw 3 ft at 13 seconds.
Sat..NW winds 10 kt. Wind waves 2 ft or less. W swell 3 to 5 ft and sw 3 ft.
Sun..NW winds 5 kt. Wind waves 2 ft or less. W swell 3 to 5 ft and sw 3 ft.
Mon..NW winds 10 kt. Wind waves 2 ft or less. W swell 2 ft. SW swell 3 ft. Patchy fog.
PZZ500 903 Pm Pdt Wed Oct 1 2014
Synopsis for the central california coast and bays including Monterey bay national marine sanctuaries.. Northwest winds will continue to decrease overnight as high pressure builds over the region. Long period southwest swell moves into the coastal waters Thursday night.

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 020514
afdmtr
area forecast discussion
national weather service san francisco bay area
1014 pm pdt Wed oct 1 2014

Synopsis Very warm to hot weather can be expected across our
entire area through Friday as strong high pressure builds over
california and offshore flow continues. Coastal areas will
experience subtle cooling over the weekend as offshore flow
weakens... But inland areas will continue to see very warm to hot
conditions. Gradual cooling is then expected in all areas early
next week as onshore flow redevelops.

Discussion As of 8:55 pdt Wednesday... Offshore flow developed
last night... Sweeping a much drier airmass across our region by this
morning. Relative humidity values had plunged into the single
digits in some spots by this afternoon and temperatures climbed
about 10 degrees above normal.

An upper ridge is currently centered offshore along 130w. The
ridge is forecast to shift slowly to the east and intensify
through the end of the week. Subsidence under the ridge will push
the temperature of the airmass aloft gradually higher over the
next few days. But the primary driver of our expected hot
conditions will be a persistent light offshore flow maintaining a
very dry airmass across the region... Even in coastal areas. High
temperatures near the coast the next two days will be well into
the 80s... And even lower to mid 90s in some locations within a few
miles of the coast. Inland areas will be uniformly in the 90s with
several spots expected to reach or exceed 100 by Friday. A heat
advisory is in effect from noon Thursday through 9 pm Friday for
all forecast zones. One factor that will help mitigate the effects
of the daytime heat is the relatively long october nights which
will allow temperatures to cool back down into the mid 50s to
lower 60s range in most areas during the overnight hours.

The upper ridge will reach its maximum intensity on Saturday and
will remain parked over california through the weekend. But by
Saturday the models indicate that offshore flow will cease and
there will probably be a weak seabreeze near the coast by
Saturday afternoon. Thus... Expect gradual cooling in coastal
areas over the weekend. Inland areas will remain very warm to hot
on Saturday and see only subtle cooling by Sunday.

The upper ridge is forecast to gradually weaken and shift eastward
early next week while a weak upper trough approaches the ca coast.

This will result in cooling in all areas on Monday and Tuesday. In
addition... We will likely see the marine layer become
reestablished... Resulting in a return of coastal low clouds and
fog by Monday night.

The longer range models and the climate prediction center indicate
continued dry weather through the middle of october along with
above normal temperatures.

Aviation As of 10:14 pm pdt Wednesday... Clear skies under light
offshore flow.VFR to continue through the forecast period with
mostly light winds. High confidence.

Vicinity of ksfo...VFR. Light winds.

Ksfo bridge approach... Similar to ksfo.

Monterey bay area terminals...VFR. Light winds.

Climate Record high temperatures for Wednesday through Friday
(10/1 to 10/3) along with the most recent date it occurred.

Sf bay area

Location 10/1... ... ... ..10/2... ... ... ... 10/3...

kentfield... ... ... ... ... .97/2012... ... .100/2012... ... ... 99/2012
san rafael... ... ... ... ..104/1980... ... .106/1980... ... ..105/1980
napa... ... ... ... ... ... ..106/1980... ... .102/1980... ... ..103/1917
san francisco... ... ... ... 97/1980... ... ..96/1980... ... ... 97/1985
sfo airport... ... ... ... ..97/1980... ... ..96/1980... ... ... 94/1985
oakland (downtown)... ... 103/1980... ... .103/1980... ... ..100/1985
oakland airport... ... ... .94/1952... ... ..98/1980... ... ... 95/1985
richmond... ... ... ... ... ..99/1980... ... .100/1980... ... ... 97/2012
livermore... ... ... ... ... 102/1952... ... .106/1980... ... ..106/1980
moffett field... ... ... ... 93/1980... ... ..95/2012... ... ... 97/1985
san jose... ... ... ... ... ..97/1980... ... ..96/2012... ... ... 97/1985
gilroy... ... ... ... ... ... 104/2001... ... .107/1980... ... ..106/1980
monterey bay area

Location 10/1... ... ... ..10/2... ... ... ... 10/3...

monterey... ... ... ... ... .103/1980... ... .101/1980... ... ... 96/1985
santa cruz... ... ... ... ..102/1965... ... .102/1980... ... ..102/1980
salinas... ... ... ... ... ..104/1980... ... .100/1980... ... ... 97/1985
salinas airport... ... ... 105/1980... ... .103/1980... ... ... 99/1985
king city... ... ... ... ... 109/1980... ... .107/1980... ... ..102/1980

Marine As of 9:00 pm pdt Wednesday... Northwest winds will
continue to decrease overnight as high pressure builds over the
region. Long period southwest swell moves into the coastal waters
Thursday night.

Mtr watches/warnings/advisories
Tngt None.

Public forecast: cw
aviation: cw
marine: ac
climate: bell
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 mi32 min NW 7.8 G 9.7 59°F 60°F7 ft1013.7 hPa (+1.3)
PRYC1 - 9415020 - Point Reyes, CA 18 mi46 min W 4.1 G 5.1 62°F 61°F1013.4 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 35 mi32 min W 3.9 G 5.8 61°F 61°F6 ft1014.2 hPa (+1.5)
46237 - San Francisco Bar, CA (142) 37 mi40 min 62°F5 ft
RCMC1 - 9414863 - Richmond, CA 38 mi34 min WNW 1 G 1.9 68°F 68°F1013.7 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 40 mi34 min SSE 1.9 G 2.9 67°F 1013.4 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 40 mi34 min Calm G 1.9 69°F 1013.9 hPa
FTPC1 - 9414290 - San Francisco, CA 41 mi34 min Calm G 1.9 63°F 63°F1013.8 hPa
PXOC1 - 9414311 - San Francisco (Pier 1), CA 44 mi34 min E 1 G 1.9 67°F 1012.6 hPa
PXSC1 44 mi34 min 67°F 57°F
OBXC1 46 mi34 min 67°F 58°F
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 46 mi34 min NNW 1.9 G 1.9
OKXC1 - 9414776 - Oakland (Berth 34), CA 46 mi34 min NW 2.9 G 4.1 67°F 1013.6 hPa
UPBC1 48 mi34 min W 2.9 G 5.1
MZXC1 - 9415102 - Martinez-Amorco CA 48 mi34 min SSW 1.9 G 2.9 66°F 70°F1013.4 hPa46°F
LNDC1 49 mi34 min NNW 2.9 G 4.1 68°F 1013.5 hPa
AAMC1 - 9414750 - Alameda, CA 49 mi34 min W 1.9 G 2.9 69°F 71°F1013.5 hPa

Wind History for Point Reyes, CA
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W21
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G31

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Santa Rosa (awos), CA20 mi29 minN 010.00 miFair54°F44°F69%1012.7 hPa
Petaluma Muni, CA20 mi27 minNE 310.00 miFair50°F42°F76%1014.6 hPa
Novato/Gnoss Field Airport, CA24 mi27 minSSW 410.00 miFair59°F44°F59%1013.9 hPa

Wind History from O69 (wind in knots)
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Last 24hrNW3CalmCalmNW6CalmCalmCalmN3CalmCalmNW3CalmSW4W4CalmSW4W12W12W9W8W3N3CalmN3
1 day agoCalmCalmCalmCalmCalmCalmCalmNW4NW3W3CalmCalmCalmW3W4SW4W9
G14
W9W11
G16
W7W4CalmNW3N3
2 days agoNW3CalmNW5NW3NW4NW4NW3W3CalmNW4CalmNW3NW3CalmW6W10
G14
W10
G16
W8W9W7W6CalmN3Calm

Tide / Current Tables for Tomales Bay entrance, California
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Tomales Bay Entrance
Click for Map
Thu -- 12:35 AM PDT     Moonset
Thu -- 12:39 AM PDT     0.28 feet Low Tide
Thu -- 07:08 AM PDT     Sunrise
Thu -- 07:30 AM PDT     3.85 feet High Tide
Thu -- 12:40 PM PDT     2.57 feet Low Tide
Thu -- 02:59 PM PDT     Moonrise
Thu -- 06:21 PM PDT     4.70 feet High Tide
Thu -- 06:53 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.40.30.61.32.12.93.53.83.83.63.22.92.62.62.83.33.84.44.74.64.23.42.51.6

Tide / Current Tables for Point Reyes, California Current
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Point Reyes
Click for Map
Thu -- 12:36 AM PDT     Moonset
Thu -- 01:21 AM PDT     0.00 knots Slack
Thu -- 04:22 AM PDT     0.88 knots Max Flood
Thu -- 07:08 AM PDT     Sunrise
Thu -- 07:52 AM PDT     -0.00 knots Slack
Thu -- 10:05 AM PDT     -0.64 knots Max Ebb
Thu -- 01:33 PM PDT     0.00 knots Slack
Thu -- 02:58 PM PDT     Moonrise
Thu -- 04:20 PM PDT     0.62 knots Max Flood
Thu -- 06:53 PM PDT     Sunset
Thu -- 07:09 PM PDT     -0.00 knots Slack
Thu -- 10:25 PM PDT     -1.19 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.5-0.10.30.70.90.80.70.4-0.1-0.5-0.6-0.5-0.4-0.10.10.40.60.60.40.1-0.4-0.9-1.2-1.1

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 (2,6,7,8)
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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.