Saturday, February24, 2018 L-36.com


Marine Weather and Tides
Dillon Beach, CA

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
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 6:46AMSunset 6:00PM Saturday February 24, 2018 7:56 PM PST (03:56 UTC) Moonrise 12:32PMMoonset 2:14AM Illumination 74% Phase: Waxing Gibbous; Moon at 10 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- 251 Pm Pst Sat Feb 24 2018
.small craft advisory in effect through Tuesday evening...
Tonight..NW winds 15 to 25 kt. Wind waves 4 to 6 ft. W swell 3 to 5 ft at 15 seconds.
Sun..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 5 to 7 ft at 15 seconds and S 3 ft at 15 seconds.
Sun night..W winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 6 to 8 ft at 14 seconds. Slight chance of showers in the evening, then showers likely after midnight.
Mon..NW winds 20 to 30 kt. Wind waves 5 to 7 ft. NW swell 7 to 9 ft at 14 seconds. Showers likely in the morning, then chance of showers in the afternoon.
Mon night..NW winds 20 to 30 kt. Wind waves 4 to 6 ft. NW swell 9 to 12 ft at 16 seconds.
Tue..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 7 to 9 ft.
Wed..SW winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 5 to 7 ft. Slight chance of showers, then rain likely.
Thu..W winds 15 to 25 kt. Wind waves 3 to 5 ft. NW swell 6 to 8 ft...increasing to 8 to 10 ft. Rain, then showers likely.
PZZ500 251 Pm Pst Sat Feb 24 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Gusty nw winds will continue overnight into Sunday as a dry cool front moves through and high pressure builds. Another strong cold front drops down the coast on Monday with some showers and gusty nw winds behind the front into Tuesday.

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 250342
afdmtr
area forecast discussion
national weather service san francisco bay area
742 pm pst Sat feb 24 2018

Synopsis Partly cloudy skies with scattered showers across the
north bay this afternoon. Otherwise, some clearing is expected
tonight with chilly low temps. Dry weather and slightly warmer
temperatures are expected through the weekend. Cooler and
unsettled weather is expected to return by early next week with
another system bringing rain to the area later next week.

Discussion As of 01:50 pm pst Saturday... A little afternoon
excitement as a few showers popped up over the north bay.

Spotters general public reported a few showers near santa rosa,
healdsburg and windsor. For what it's worth, local WRF and hrrr
kept showers off the coast this afternoon. That definitely didn't
pan out and therefore updated forecast to better reflect reality.

Do expect this showers to gradually dissipate over the next hour
or so.

No frost or freeze headline needed for tonight. A slight increase
in cloud cover will limited cooling potential. Temps tonight are
forecast to be a few warmer than last night. That being said,
overnight lows will still be rather chilly and in the upper 20s to
mid 30s for most locations. Bay shoreline and coast in the low 40s
for lows.

Weak ridging ahead of the next storm system will allow for warmer
weather on Sunday. In fact, it could be some of the warmest temps
of the last several days with highs hitting 60 plus across the
interior.

By Sunday night the next system approaching from the north will
begin to impact the bay area. Showers will move in from N to S and
likely impact the Monday morning commute. Snow levels will
initially be greater than 3k feet, but then gradually drop through
the day. Winter precip will be possible over the higher peaks of
the forecast area, similar to earlier this week. Precip will end
from NW to SE Monday night into Tuesday. Rainfall amounts are
still generally low and mainly a few hundredths to a few tenths.

Dry weather returns briefly on Tuesday with a slight warm up, but
the next storm is waiting in the wings. For several model runs
(deterministic ensemble) now a potent low pressure has been
forecast to impact the pac NW Wednesday into Thursday. The
associated cold front is also forecast to move into norcal by
Thursday morning. The front pushes through the bay area Thursday
with post frontal showers lingering well into Friday. Not an
atmospheric river event per se, but a better moisture tap than we
have seen over the last week. Rainfall amounts could exceed an
inch across the north bay and one quarter to one half elsewhere.

Details will likely be sorted out between now and then, but
initial thinking is a wetter scenario. It should be noted that
this set up will be warmer with higher snow levels and initially
impacting only the santa lucias. The snow levels will drop behind
the front.

Lastly, the mjo has been on track to swing into phase 2 3, albeit
weak, for some time now. Climo charts for phase 2 3 indicate
wetter results for ca. The shift to phase 2 3 corresponds with feb
28 march 01 time frame, which fits the approaching front on the
medium range models.

Aviation As of 7:39 pm pst Saturday...VFR. There is more water
vapor in the near surface to lower atmosphere this evening compared
to yesterday at this time, double digit dewpoint temperature recovery,
thus areas MVFR CIGS are possible overnight; best chance for MVFR cigs
per WRF model boundary layer output is from the south bay to the north
central coast. Boundary layer drying tends to settle back in on w-nw
flow over the remaining bay area overnight and Sunday morning.

A quickly moving, elevated, and mainly dry cold front swept southward
over the area today. Cold air advection was mostly located in the lower
levels 925 mb to 850 mb, gusty surface to lower level w-nw winds will
diminish this evening per decreasing instability, mixing within the
boundary layer. The 00z temperature profile on this evening's 00z oakland
upper air sounding looks almost identical to last evening's, but the
big difference is the increase in water vapor below the subsidence inversion.

High pressure reaches into the great basin temporarily reversing the
sfo-wmc pressure gradient to weak offshore and flattening the sfo-sac
gradient tonight into Sunday morning. A low pressure system arrives
from the north late Sunday and Monday.

Vicinity of ksfo... 5 minute wind observations still show winds westerly
gusting to 20-25 knots. As inherited TAF indicates, winds should begin
to subside below 20 knots by 04z or so. Winds continue to subside tonight,
possibly becoming light n-ne early Sunday morning.

Sfo bridge approach... Similar to ksfo.

Monterey bay terminals...VFR. Onshore winds will gradually dissipate
and become e-se 5-10 knots late tonight and Sunday morning.

Climate
A few locations may be near record low temperatures Sunday morning
and possibly Tuesday morning next week. Temperatures will be mainly
below late february normals through early next week, but increasing
clouds, showers, and breezy winds with a low pressure system arriving
later Sunday into Monday should help keep lows above records on Monday.

Location Sunday Tuesday
sf bay area
healdsburg 29 in 1920 25 in 1962
santa rosa 24 in 1915 24 in 1962
calistoga 29 in 1966 24 in 2012
kentfield 29 in 1920 26 in 1962
san rafael 26 in 1904 29 in 1962
napa 30 in 1962 28 in 2011
san francisco 38 in 1887 38 in 1962
sfo airport 35 in 1953 32 in 1951
half moon bay 33 in 1996 31 in 2011
oakland airport 33 in 1953 31 in 1962
richmond 36 in 1962 34 in 1962
livermore 28 in 1942 25 in 1962
moffett field 34 in 1953 30 in 1962
san jose 28 in 1894 28 in 1893
gilroy 31 in 1965 24 in 1962
monterey bay area
santa cruz 30 in 1911 25 in 1962
salinas 32 in 1997 25 in 1962
salinas airport 25 in 1935 29 in 1962
monterey 35 in 1956 27 in 1962
king city 23 in 1974 23 in 1962

Marine As of 5:49 pm pst Saturday... Gusty NW winds will continue
overnight into Sunday as a dry cool front moves through and high
pressure builds. Another strong cold front drops down the coast on
Monday with some showers and gusty NW winds behind the front into
Tuesday.

Mtr watches warnings advisories
Tngt Sca... Pigeon pt to pt pinos 0-10 nm
sca... Pt arena 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 piedras blancas 10-60 nm
sca... Mry bay until 9 pm
public forecast: mm
aviation: canepa
marine: rww
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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 mi26 min NNW 23 G 29 50°F 49°F1027.8 hPa44°F
PRYC1 - 9415020 - Point Reyes, CA 18 mi38 min WNW 16 G 27 51°F1026.8 hPa
46026 - SAN FRANCISCO - 18NM West of San Francisco, CA 35 mi66 min NW 23 G 27 49°F 50°F6 ft1026.6 hPa (-0.9)
46237 - San Francisco Bar, CA (142) 37 mi56 min 51°F6 ft
RCMC1 - 9414863 - Richmond, CA 38 mi44 min WNW 13 G 19 50°F 52°F1025.9 hPa
TIBC1 - Tiburon Pier, San Francisco Bay, CA 38 mi42 min NW 5.1 49°F 1026 hPa
DPXC1 - 9415141 - Davis Point, San Pablo Bay, CA 40 mi38 min WNW 6 G 12 51°F 1026 hPa
PPXC1 - 9414847 - Richmond (Point Potrero), CA 40 mi38 min WNW 11 G 18 51°F 1026.5 hPa
FTPC1 - 9414290 - San Francisco, CA 41 mi44 min W 7 G 14 50°F 52°F1026.7 hPa
PXSC1 44 mi38 min 52°F 39°F
PXOC1 - 9414311 - San Francisco (Pier 1), CA 44 mi38 min W 6 G 11 51°F 1025.5 hPa
OBXC1 46 mi44 min 51°F 40°F
OKXC1 - 9414776 - Oakland (Berth 34), CA 46 mi38 min NW 13 G 16 51°F 1026.3 hPa
OMHC1 - 9414769 - Oakland Middle Harbor Met, CA 46 mi38 min WNW 9.9 G 15
MZXC1 - 9415102 - Martinez-Amorco CA 48 mi38 min WNW 8 G 11 51°F 52°F1026.1 hPa45°F
AAMC1 - 9414750 - Alameda, CA 49 mi44 min WNW 6 G 9.9 51°F 53°F1026.4 hPa
LNDC1 49 mi38 min NNW 9.9 G 13 51°F 1026.3 hPa

Wind History for Point Reyes, CA
(wind in knots)    EDIT      (on/off)   Help
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W12
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G36
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Santa Rosa, Santa Rosa Sonoma County Airport, CA20 mi63 minNNW 510.00 miFair47°F37°F69%1025.4 hPa
Petaluma Municipal Airport, CA20 mi61 minWSW 710.00 miMostly Cloudy46°F42°F87%1026.4 hPa
Novato / Gnoss Field, CA24 mi81 minW 12 G 2110.00 miFair50°F39°F67%1026.1 hPa

Wind History from O69 (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm443NW5W14
G21
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W12W15
G23
W12
G18
W7
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1 day ago------------------------NW5NW7NW6NW7
G12
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4
G11
W11W7W9CalmCalm
2 days agoCalmNW3CalmCalmCalmCalmW3NW3CalmW5W444W10NW8------------------

Tide / Current Tables for Tomales Bay entrance, California
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Tomales Bay Entrance
Click for Map
Sat -- 02:13 AM PST     Moonset
Sat -- 05:36 AM PST     5.17 feet High Tide
Sat -- 06:50 AM PST     Sunrise
Sat -- 12:33 PM PST     Moonrise
Sat -- 01:16 PM PST     -0.05 feet Low Tide
Sat -- 06:00 PM PST     Sunset
Sat -- 07:58 PM PST     3.39 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.42.73.344.75.15.14.843210.3-00.10.61.32.12.83.33.43.332.7

Tide / Current Tables for Point Reyes, California Current
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Point Reyes
Click for Map
Sat -- 12:38 AM PST     0.00 knots Slack
Sat -- 02:13 AM PST     Moonset
Sat -- 03:36 AM PST     0.68 knots Max Flood
Sat -- 06:29 AM PST     -0.00 knots Slack
Sat -- 06:50 AM PST     Sunrise
Sat -- 09:48 AM PST     -1.26 knots Max Ebb
Sat -- 12:33 PM PST     Moonrise
Sat -- 01:57 PM PST     0.00 knots Slack
Sat -- 05:00 PM PST     0.94 knots Max Flood
Sat -- 06:00 PM PST     Sunset
Sat -- 08:20 PM PST     -0.00 knots Slack
Sat -- 10:29 PM PST     -0.61 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.20.10.40.60.70.50.2-0.2-0.8-1.2-1.3-1.1-0.8-0.400.50.80.90.90.60.2-0.3-0.6-0.6

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 (22,6,7,8)
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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.