Monday, March18, 2019 L-36.com


Marine Weather and Tides
Manchester, CA

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:17AMSunset 7:23PM Monday March 18, 2019 7:20 PM PDT (02:20 UTC) Moonrise 3:51PMMoonset 5:07AM Illumination 96% Phase: Waxing Gibbous; Moon at 13 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 Coastal Waters From Point Arena To Point Reyes California Out To 10 Nm- 217 Pm Pdt Mon Mar 18 2019
Rest of today..S winds 5 to 10 kt. Wind waves 2 ft or less. W swell 3 to 5 ft at 13 seconds and sw 1 to 2 ft at 16 seconds. Patchy fog.
Tonight..SE winds 5 to 15 kt. Wind waves 2 ft or less. W swell 3 to 4 ft at 18 seconds and S 1 to 2 ft at 16 seconds. Patchy fog.
Tue..SE winds 10 to 15 kt. Wind waves 2 ft or less. W swell 5 to 7 ft at 18 seconds and S 1 to 2 ft at 18 seconds.
Tue night..SE winds up to 10 kt. Wind waves 2 ft or less. W swell 6 to 8 ft at 18 seconds and S 1 to 2 ft at 17 seconds. Showers likely.
Wed..NW winds 10 to 20 kt with gusts up to 30 kt. Wind waves 3 to 4 ft. W swell 8 to 9 ft at 16 seconds and S 1 to 2 ft at 18 seconds. Showers likely.
Wed night..NW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 3 to 5 ft. W swell 7 to 8 ft at 14 seconds and S 1 to 2 ft at 17 seconds. A chance of showers.
Thu..NW winds 10 to 20 kt with gusts up to 25 kt. Wind waves 3 to 4 ft. W swell 5 to 7 ft and S 1 to 2 ft.
Fri..SW winds 5 to 15 kt. Wind waves 2 ft or less. W swell 8 to 11 ft and S 1 to 2 ft. Showers likely.
PZZ500 217 Pm Pdt Mon Mar 18 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Winds will become more southerly into this evening ahead of an approaching low pressure system moving in from the west. Southerly winds will increase along with rain chances on Tuesday as a cold front moves through the region. Winds will turn back out of the west to northwest on Wednesday. A long period westerly swell will arrive tomorrow, increasing shoaling on bars and harbor entrances is anticipated.


7 Day Forecast for Marine Location Near Manchester, CA
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location: 38.95, -123.73     debug


Area Discussion for - Eureka, CA
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Fxus66 keka 182155
afdeka
area forecast discussion
national weather service eureka ca
255 pm pdt Mon mar 18 2019

Synopsis Mild and dry conditions can be expected through most
of Tuesday. Light rain can be expected late Tuesday and
Wednesday, with a quick round of moderate rain expected Friday.

Rain will taper off on Saturday with a dry day on Sunday.

Discussion High pressure has started to move out of the area as
a frontal boundary has started to approach the area. This change
in flow as brought stratus back to the coast. The marine layer is
quite shallow and there has been some dense fog on the coast. Some
dense fog is possible this evening again, but after midnight
tonight southeast winds will start diminish the fog. Coastal
clouds may linger into Tuesday morning as the marine layer
deepens.

Tuesday afternoon the front will start to bring some showers to
the inland areas. These is some instability over the interior,
but it doens't look like the lapse rates are good enough for
thunder. Tuesday night into Wednesday this front moves across the
area. Southeast flow ahead of the front may keep the humboldt
coast fairly dry, although a few sprinkles are possible. This
front will bring showers to the area through the day on Wednesday.

Rainfall amounts will generally be light, less than a quarter in
most areas. Snow levels will be mainly above 5,000 feet with this
event.

These showers are expected to taper off Wednesday night. Thursday
mainly dry conditions are expected, although there could be a few
showers over the area interior area in the afternoon. Valley fog
is likely, especially near the coast.

Thursday night another system starts to approach the area. This is
expected to bring a period of rain to the area at some point on
Friday. Southerly winds will pick up to around 15 to 25 mph as the
front moves through. There are still some model discrepancies on
the exact timing of the front moving through, but it looks like it
will be only 3 to 6 hours of rain. Currently there is still a
chance for rain Saturday, but confidence is low on when it will
end and it could end earlier.

Sunday looks dry and warm with another system possible on Monday.

The 12z GFS shows this moving in late in the day on Monday, but
confidence is low on the exact timing of this. Mkk

Aviation Visible satellite imagery showed extensive stratus
clinging to the immediate shoreline this afternoon. Fog and stratus
has been meandering menacingly in and out of kacv. Even though it
was parked right along the shoreline, kcec has surprisingly remained
clear through most of the day. With the stratus lurking about
offshore, expect highly variable conditions with fog and low clouds
in and out of the coastal airports through this evening. Also, if
the layer remains shallow, light easterly and southeasterly winds
later this evening may scour it out, withVFR prevailing through the
remainder of the night. NAM profiles suggest this drying out, while
the hrrr deepens the saturated layer through night. Forecast
confidence the coastal terminals will see significant improvement
remains low. Southerly winds may advect moist air from sonoma county
to around kuki early Tue if the marine layer deepens and pushes into
sonoma county. Confidence this will occur is too low at this point
to add fog or low cloud to the forecast for uki.

Marine Generally light southerlies will persist through tonight
before increasing to around 15 kt over the southern waters on tue.

This will result in the development of steeper wind waves as another
westerly swell builds through the day on tue. Combined seas around
10 to 12 feet are expected over the southern waters due to a
combination of westerly swell and shorter period wave groups. Winds
are forecast to become n-nw Wed and thu. Seas may become steeper
during this time frame as westerly swell subside and n-nw wind wave
builds. However, a larger westerly swell will start to build late on
Thursday and into Friday. Combined seas will start to ramp up (above
10 ft) on Friday, due to a combination short period southerly wind
waves and longer period westerly swell. Seas will probably remain
elevated (above 10 ft) through much of Saturday.

Beach hazards A long-period westerly moving through the
coastal waters will result in a moderate to high sneaker wave
threat on area beaches from tonight through Tuesday evening.

Beachgoers should use caution along area beaches and keep a safe
distance from the surf zone, as waves may suddenly wash much
farther up the beach than expected after several minutes of
relatively smaller waves.

Eka watches warnings advisories
Ca... Beach hazards statement from 11 pm pdt this evening through
Tuesday evening for caz101-103-104-109.

Northwest california coastal waters...

small craft advisory from 9 am to 11 pm pdt Tuesday for pzz455-
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 3 mi33 min NNE 1.9 G 5.1 51°F 52°F1013.5 hPa
46014 - PT ARENA - 19NM North of Point Arena, CA 23 mi21 min S 7.8 G 9.7 51°F 54°F1013.1 hPa (-0.6)

Wind History for Arena Cove, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Ukiah Municipal Airport, CA31 mi25 minS 510.00 miFair71°F39°F31%1011.6 hPa

Wind History from UKI (wind in knots)
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Last 24hrNW33CalmNW3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmSE6SE7S8S13
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1 day agoNW3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm--343S33SE6S3
2 days agoW3CalmW4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmN3CalmNW3CalmCalmCalmN6W11
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Tide / Current Tables for Point Arena, California
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Point Arena
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Mon -- 03:27 AM PDT     2.12 feet Low Tide
Mon -- 06:06 AM PDT     Moonset
Mon -- 07:21 AM PDT     Sunrise
Mon -- 09:13 AM PDT     6.13 feet High Tide
Mon -- 04:08 PM PDT     -0.74 feet Low Tide
Mon -- 04:50 PM PDT     Moonrise
Mon -- 07:24 PM PDT     Sunset
Mon -- 10:48 PM PDT     5.30 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.23.42.62.22.22.83.74.85.66.15.95.13.82.20.7-0.3-0.7-0.50.41.62.94.25.15.3

Tide / Current Tables for Point Arena, California Current
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Point Arena
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Mon -- 01:15 AM PDT     -0.88 knots Max Ebb
Mon -- 04:34 AM PDT     0.00 knots Slack
Mon -- 06:06 AM PDT     Moonset
Mon -- 07:21 AM PDT     Sunrise
Mon -- 07:25 AM PDT     0.99 knots Max Flood
Mon -- 10:17 AM PDT     -0.00 knots Slack
Mon -- 01:28 PM PDT     -1.57 knots Max Ebb
Mon -- 04:50 PM PDT     Moonrise
Mon -- 05:17 PM PDT     0.00 knots Slack
Mon -- 07:24 PM PDT     Sunset
Mon -- 08:20 PM PDT     1.32 knots Max Flood
Mon -- 11:31 PM PDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.6-0.9-0.8-0.6-0.30.20.710.90.70.2-0.5-1.2-1.5-1.5-1.3-0.8-0.20.511.31.30.90.4

Weather Map and Satellite Images
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wmap_P
GOES Local Image of CentralWestCoast    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
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Wind Forecast for Eureka, CA (22,6,7,8)
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Ground Weather Radar Station Sacramento, CA
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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.