Thursday, January18, 2018 L-36.com


Marine Weather and Tides
Boonville, 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 7:27AMSunset 5:20PM Thursday January 18, 2018 5:41 AM PST (13:41 UTC) Moonrise 8:30AMMoonset 7:04PM Illumination 3% Phase: Waxing Crescent; Moon at 2 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- 222 Am Pst Thu Jan 18 2018
.small craft advisory for hazardous seas in effect through Friday evening...
Today..S winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 17 to 20 ft at 19 seconds. Rain likely in the morning, then chance of rain in the afternoon.
Tonight..NW winds 10 to 20 kt. Wind waves 2 to 4 ft. W swell 16 to 19 ft at 16 seconds. Rain likely in the evening, then showers likely and slight chance of Thunderstorms after midnight.
Fri..W winds 10 to 20 kt. Wind waves 2 to 4 ft. W swell 14 to 16 ft at 14 seconds. Showers likely in the morning. Slight chance of Thunderstorms through the day. Chance of showers in the afternoon.
Fri night..NW winds 10 to 20 kt. Wind waves 2 to 4 ft. W swell 12 to 13 ft at 14 seconds. Chance of showers in the evening, then slight chance of showers after midnight.
Sat..NW winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 11 to 14 ft at 13 seconds. Slight chance of showers.
Sun..S winds 15 to 25 kt. Wind waves 3 to 5 ft. W swell 7 to 9 ft...increasing to 10 to 13 ft. Rain likely.
Mon..NW winds 5 to 15 kt. Wind waves 1 to 3 ft. W swell 10 to 13 ft. Chance of showers.
PZZ500 222 Am Pst Thu Jan 18 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... A large long period westerly swell will continue to impact the coastal waters through the remainder of the week. This swell will bring hazardous seas to the region as well as large breaking waves to the coastline through Friday. A cold front will pass over the waters later this morning, switching winds out of the west or northwest by this afternoon or evening. Rain chances will increase through the morning and will continue through the weekend.

7 Day Forecast for Marine Location Near Boonville, CA
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location: 38.89, -123.38     debug


Area Discussion for - Eureka, CA
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Fxus66 keka 181208
afdeka
area forecast discussion
national weather service eureka ca
408 am pst Thu jan 18 2018

Synopsis Showers will persist across the region through Friday.

These showers combined with cold air aloft will yield mountain
snow and possibly coastal hail. A brief period of drier weather
is expected to occur during Saturday, followed by another round of
rain on Sunday.

Discussion A plume of post frontal ascent was centered over
nwrn ca early Thursday morning. This was aiding in a persistent
zone of light rain that will gradually shift east of the area by
Thursday afternoon. However, a cold midlevel airmass will follow
in the wake of the rain, which will yield increasing shower
activity by Thursday night. A steep lapse rate modest mucape
environment will support isolated thunderstorm potential over the
waters and immediate coast, as well as small hail. In addition,
700 mb temperatures near -12c will aid in lowering snow levels to
around 2500 feet. As a result, accumulating snow is expected
across interior mountains, including highway passes such as berry
summit, scott mountain summit, and south fork summit. Model
guidance has backed off on QPF amounts during the past few
runs... Thus, 24 hour snow accumulations ranging from 3-7 inches
are generally expected for high elevation travel corridors.

Midlevel heights are forecast to rise Friday night into Saturday
leading to shower dissipation. However, this period of dry weather
will be short-lived due to a trough advancing across the nern pac
Saturday night and Sunday. This will drive a cold front southeast
across the region, resulting in a high probability of
precipitation. Current model guidance indicates that interior
temperatures will be sufficiently cold for snow (particularly over
trinity county) as pre-frontal precipitation spreads inland.

Aviation Light rain continues to fall at coastal terminals
early this morning, with low ceilings and visibilities generally
fluctuating between ifr and MVFR. Some modest improvement is
expected during the mid to late morning at cec and acv, perhaps
with a brief period ofVFR conditions. However, vigorous shower
activity will return quickly, likely around noon pst or slightly
later. As a result, highly erratic but overall worsening ceilings
can be expected through the remainder of the day and overnight,
likely again fluctuating between ifr and MVFR. Occasional
lightning strikes and small hail will also be possible this
afternoon through the overnight hours.

At uki, rain has not yet begun, but some MVFR ceilings have
plagued the valley ahead of the front. Rain will likely arrive
just prior to sunrise, likely with worsening ceilings. Like
coastal areas, a brief break in the rain is expected mid to late
morning, followed by multiple rounds of showers through the
remainder of the day and night and alternating MVFR and ifr
ceilings. Brc

Marine While winds have begun to weaken across the waters
following the passage of a cold front, wave heights continue to
build with the arrival of a very large westerly swell. As of 2 am
pst significant wave heights have reached 20 feet and 19 seconds
at buoy 46022 (eel river), and are expected to peak somewhere
between 22 and 27 feet throughout the northwest california waters
late this morning. Waves on the larger end of that range are more
likely in the waters north of CAPE mendocino. This will likely
result in breakers of between 25 and 32 feet along many area
beaches, particularly those facing westward.

Waves are expected to peak in height late this morning, and will
begin a gradual decay that will continue through the weekend. Wave
heights will likely drop to 16 to 18 feet by Friday morning, 14
to 16 feet Saturday morning, then to around 10 feet by Sunday
morning.

Seas will once again become hazardous later on Sunday due thanks
to a reinforcing westerly swell and also another quick round of
strong, possibly gale force southerly winds. Winds will quickly
weaken Monday, and seas will gradually settle through the early
part of next week. Brc

High surf A large westerly swell is beginning to move through
the waters, and will continue to build through the day today.

Breaking wave heights are very likely to reach 25 to 31 feet by
mid- morning, and will continue through much of the day. On
average, the largest of these waves are expected to break along
west-facing beaches. However, very large breaking waves will be
possible on most beaches. Wave heights will very gradually
diminish late in the day and steadily through the weekend, but
large breaking waves will continue to occur through much of the
weekend. Brc

Eka watches warnings advisories
Ca... High surf warning until 10 pm pst this evening for caz101-103-
104-109.

Winter weather advisory from 7 pm this evening to 7 pm pst
Friday for caz105>108.

Winter weather advisory from noon today to 7 pm pst Friday for
caz102.

Northwest california coastal waters... Hazardous seas warning
until 10 am pst Saturday for pzz450-455- 470-475.

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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
ANVC1 - 9416841 - Arena Cove, CA 18 mi47 min W 6 G 8 54°F 56°F1019.3 hPa
46014 - PT ARENA - 19NM North of Point Arena, CA 39 mi41 min W 5.8 G 9.7 1018.6 hPa (-0.7)
46263 43 mi161 min 56°F19 ft
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 45 mi51 min SE 12 G 19 55°F 56°F16 ft1019 hPa55°F

Wind History for Arena Cove, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Ukiah Municipal Airport, CA20 mi45 minSSE 910.00 miOvercast53°F50°F89%1017.5 hPa

Wind History from UKI (wind in knots)
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Last 24hrCalmCalmN3SE3CalmCalmE4S5S5SE5S6SE5S8S3SE3CalmSW4CalmCalmCalmCalmS5S10S9
1 day agoCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmW3CalmE4CalmCalmCalmCalmS3SE3CalmCalm
2 days agoE3CalmCalmCalmCalmCalmSE5S9SE8S6SE3SE8S6S4SE7CalmCalmN3E4CalmCalmCalmCalmS3

Tide / Current Tables for Arena Cove, Pacific Ocean, California
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Arena Cove
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Thu -- 12:29 AM PST     4.97 feet High Tide
Thu -- 05:17 AM PST     3.14 feet Low Tide
Thu -- 07:30 AM PST     Sunrise
Thu -- 08:30 AM PST     Moonrise
Thu -- 11:05 AM PST     6.27 feet High Tide
Thu -- 05:20 PM PST     Sunset
Thu -- 06:15 PM PST     -0.09 feet Low Tide
Thu -- 07:05 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.94.94.543.43.23.23.74.55.366.365.34.12.71.40.4-0.10.10.81.934.1

Tide / Current Tables for Point Arena, California Current
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Point Arena
Click for Map
Thu -- 01:11 AM PST     -0.00 knots Slack
Thu -- 03:20 AM PST     -0.66 knots Max Ebb
Thu -- 06:33 AM PST     0.00 knots Slack
Thu -- 07:30 AM PST     Sunrise
Thu -- 08:31 AM PST     Moonrise
Thu -- 09:23 AM PST     0.72 knots Max Flood
Thu -- 12:09 PM PST     -0.00 knots Slack
Thu -- 03:28 PM PST     -1.35 knots Max Ebb
Thu -- 05:20 PM PST     Sunset
Thu -- 07:05 PM PST     Moonset
Thu -- 07:23 PM PST     0.00 knots Slack
Thu -- 10:21 PM PST     1.00 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.60.1-0.4-0.6-0.6-0.4-0.20.10.50.70.70.40.1-0.4-1-1.3-1.3-1-0.6-0.20.30.811

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 Eureka, CA (8,2,3,4)
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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.