Wednesday, January24, 2018 L-36.com


Marine Weather and Tides
Sea Ranch, 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 7:23AMSunset 5:26PM Wednesday January 24, 2018 3:50 AM PST (11:50 UTC) Moonrise 11:45AMMoonset 12:04AM Illumination 52% 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- 213 Am Pst Wed Jan 24 2018
.small craft advisory in effect through Thursday evening...
Today..S winds 15 to 25 kt. Wind waves 4 to 6 ft. W swell 6 to 8 ft at 14 seconds. Chance of rain in the morning, then rain in the afternoon.
Tonight..W winds 10 to 20 kt. Wind waves 2 to 4 ft. W swell 9 to 11 ft at 16 seconds. Rain likely in the evening, then chance of showers after midnight.
Thu..SW winds 15 to 25 kt. Wind waves 4 to 6 ft. W swell 9 to 11 ft at 15 seconds. Chance of showers in the morning, then showers likely and isolated Thunderstorms in the afternoon.
Thu night..W winds 20 to 30 kt. Wind waves 5 to 7 ft. W swell 11 to 14 ft at 14 seconds. Chance of showers in the evening, then slight chance of showers after midnight.
Fri..SW winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 10 to 13 ft at 13 seconds. Slight chance of showers.
Sat..N winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 7 to 10 ft. Slight chance of showers.
Sun..NW winds 10 kt. Wind waves 2 ft or less. W swell 6 to 8 ft.
PZZ500 213 Am Pst Wed Jan 24 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... An approaching cold front will result in increasing southerly winds today along with chances of rain. Winds will turn westerly this afternoon in the wake of the frontal passage. Instability behind the cold front will bring a slight chance for Thunderstorms across the coastal waters tonight and Thursday.

7 Day Forecast for Marine Location Near Sea Ranch, CA
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location: 38.76, -123.54     debug


Area Discussion for - San Francisco/Monterey Bay Area, CA
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Fxus66 kmtr 241136
afdmtr
area forecast discussion
national weather service san francisco bay area
336 am pst Wed jan 24 2018

Synopsis Expect increasing rain chances from north to south
through the day as the next storm system impacts the area. Steady
rain quickly turns to showers for Thursday. A round of more
organized showers is possible Thursday afternoon as the upper low
moves inland. Dry weather forecast Friday through the weekend and
into early next week.

Discussion As of 3:28 am pst Wednesday... Goes-east infrared
imagery shows increasing clouds early this morning across the
north bay in advance of an upcoming storm system. Regional radar
shows light to moderate rain presently falling in humboldt county
and locations north. This rain should make it to the north bay
around or after sunrise on Wednesday, with rain chances spreading
south through the day with the sfc cold front's gradual
southeastward progression. Models remain consistent with storm
total rain amounts: 1-2" for the north bay hills mountains, 0.5-1"
for the north bay valleys, and around 0.33-0.67" in the san
francisco bay area (with higher amounts possible in the santa cruz
mountains and lesser amounts possible in the santa clara valley).

Farther south, rain amounts will continue to decrease with
generally less than 0.50" expected in monterey and san benito
counties, with the highest amounts along the coast near around big
sur. In addition to the rain, breezy conditions are possible on
Wednesday with southerly wind gusts up to 25 to 35 mph ahead of
the front.

Behind the cold front, the northwest winds will aid in ushering in
cooler air aloft (ie cold air advection). The 00z Wednesday (4 pm
pst Tuesday) oakland sounding recorded an 850 mb temp of 9 deg c;
by 00z Thursday (4 pm pst Wednesday) expect the 850 mb temps to
fall to around 5 deg c with additional cooling to below 0 deg c
Wednesday night and Thursday. A bit higher in the atmospheric
profile at 700 mb, temperatures presently around 0 deg c will
tumble to around -10 to -13 deg c by Thursday. This will result in
steep lapse rates that will provide increased convective
potential, particularly in the northern waters and the north bay.

Think isolated thunder potential is justified on Thursday
afternoon, and matches with the storm prediction center's day 2
convective outlook. With the freezing levels falling to
3,000-4,000 ft msl, can't rule out the potential for these
convective showers storms to produce small hail and brief heavy
downpours.

Beyond Thursday, forecast models are in good agreement with
building an upper level ridge off the baja california coast. This
will boost 500 mb heights that will translate to dry weather and a
warming trend at the surface as rain chances are deflected to far
northern california, oregon, and washington state. The canadian
model tries to bring in a weak frontal system as far south as the
golden gate by next week Monday or Tuesday, but the GFS and ecmwf
hold the ridge in place with dry conditions prevailing. In fact,
the GFS and ECMWF hold the ridge over the eastern pacific through
the end of january and into the beginning of february.

Aviation As of 3:36 am pst Wednesday... For 12z tafs. Satellite
imagery shows mid to high level clouds streaming over the area.

Mixed bag of conditions ranging fromVFR to lifr. Patchy fog in
the north bay is expected to remain in place over the next few
hours or so. CIGS are expected to lower to MVFR as a cold front
approaches the area this morning. Precip is set to arrive to the
sf bay area by around 20-21z. Increasing southerly winds as the
morning progresses with gusts at ksfo up to 25 kt after 21z. Rain
will turn to showers in the wake of the front tonight and cigs
will rise.

Vicinity of ksfo...VFR through early this morning becoming MVFR
after 15-16z and light rain after 20-21z. Light south to
southeast increasing to 15-18 kt gusting to 25 kt after 20z.

Sfo bridge approach... Similar to sfo.

Monterey bay terminals...VFR through late this morning becoming
MVFR after 21z. Showers to move into the area by around 00-01z.

Marine As of 02:13 am pst Wednesday... An approaching cold
front will result in increasing southerly winds today along with
chances of rain. Winds will turn westerly this afternoon in the
wake of the frontal passage. Instability behind the cold front
will bring a slight chance for thunderstorms across the coastal
waters tonight and Thursday.

Mtr watches warnings advisories
Tday Sca... Pigeon pt to pt pinos 0-10 nm from 1 pm
sca... Pt pinos to pt piedras blancas 0-10 nm from 1 pm
sca... Pt arena to pigeon pt 10-60 nm
sca... Pigeon pt to pt piedras blancas 10-60 nm from 2 pm
sca... Pt arena to pt reyes 0-10 nm
sca... Sf bay from 9 am
sca... Pt reyes to pigeon pt 0-10 nm from 9 am
sca... Mry bay from 4 pm
public forecast: rowe
aviation: as
marine: as
visit us at

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ANVC1 - 9416841 - Arena Cove, CA 14 mi51 min ESE 8.9 G 13 54°F 54°F1019.3 hPa (-1.3)
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 38 mi41 min SSE 12 G 14 53°F 56°F1019.6 hPa50°F
46014 - PT ARENA - 19NM North of Point Arena, CA 40 mi41 min SSE 21 G 27 1017.6 hPa
46263 46 mi51 min 55°F7 ft

Wind History for Arena Cove, CA
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Ukiah Municipal Airport, CA32 mi55 minS 510.00 miOvercast49°F43°F80%1019 hPa

Wind History from UKI (wind in knots)
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Last 24hrCalmCalmCalmCalmCalmCalmN5CalmCalmCalmCalmCalmCalmCalmCalmCalmSE5SE5SE3SE3CalmSE6SE4S5
1 day agoN6N4W3CalmCalmCalmCalmN43CalmN5NW3W3CalmCalmNW3CalmN5NW3CalmCalmCalmCalmCalm
2 days agoW3CalmCalmCalmN3E5CalmCalmCalm3CalmS6S7S6S7S7S8S11S10
G18
S10S7S5S73

Tide / Current Tables for Arena Cove, Pacific Ocean, California
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Arena Cove
Click for Map
Wed -- 12:05 AM PST     Moonset
Wed -- 04:04 AM PST     5.78 feet High Tide
Wed -- 07:27 AM PST     Sunrise
Wed -- 10:48 AM PST     2.01 feet Low Tide
Wed -- 11:45 AM PST     Moonrise
Wed -- 02:20 PM PST     First Quarter
Wed -- 04:27 PM PST     4.12 feet High Tide
Wed -- 05:27 PM PST     Sunset
Wed -- 10:02 PM PST     2.06 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
344.95.55.85.654.23.32.62.122.22.73.33.84.14.13.83.32.72.22.12.2

Tide / Current Tables for Point Arena, California Current
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Point Arena
Click for Map
Wed -- 12:05 AM PST     Moonset
Wed -- 01:52 AM PST     0.82 knots Max Flood
Wed -- 05:05 AM PST     -0.00 knots Slack
Wed -- 07:27 AM PST     Sunrise
Wed -- 08:01 AM PST     -1.01 knots Max Ebb
Wed -- 11:45 AM PST     Moonrise
Wed -- 11:57 AM PST     0.00 knots Slack
Wed -- 02:20 PM PST     First Quarter
Wed -- 02:38 PM PST     0.65 knots Max Flood
Wed -- 05:27 PM PST     Sunset
Wed -- 05:45 PM PST     -0.00 knots Slack
Wed -- 08:21 PM PST     -0.76 knots Max Ebb
Wed -- 11:34 PM PST     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.40.70.80.70.40-0.4-0.8-1-0.9-0.6-0.300.40.60.60.50.3-0.1-0.5-0.7-0.7-0.5-0.2

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 (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.