Saturday, July21, 2018 L-36.com


Marine Weather and Tides
Boonville, CA

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7/21/2018 Trying to make page Mobile Friendly

Sunrise 6:03AMSunset 8:35PM Saturday July 21, 2018 8:11 PM PDT (03:11 UTC) Moonrise 2:33PMMoonset 12:41AM Illumination 68% Phase: Waxing Gibbous; Moon at 9 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- 154 Pm Pdt Sat Jul 21 2018
Tonight..NW winds up to 10 kt...becoming S after midnight. Wind waves 2 ft or less. NW swell 3 to 6 ft at 10 seconds. Patchy fog after midnight.
Sun..S winds 5 to 10 kt. Wind waves 2 ft or less. Mixed swell nw 3 to 5 ft at 9 seconds and sw around 3 ft at 18 seconds. Patchy fog.
Sun night..NW winds up to 10 kt. Wind waves 2 ft or less. Mixed swell nw 3 to 4 ft at 9 seconds and sw around 3 ft at 17 seconds. Patchy fog.
Mon..NW winds 5 to 15 kt. Wind waves 2 ft or less. Mixed swell nw 3 to 4 ft at 8 seconds and sw around 3 ft at 22 seconds. Patchy fog.
Mon night..NW winds 5 to 15 kt. Wind waves 3 to 4 ft. Mixed swell nw around 3 ft at 8 seconds and sw 3 to 4 ft at 21 seconds. Patchy fog.
Tue..NW winds 5 to 15 kt. Wind waves 2 ft or less. Mixed swell nw around 3 ft and sw 3 to 4 ft. Patchy fog.
Tue night..NW winds 10 to 15 kt. Wind waves 2 ft or less. Mixed swell nw around 3 ft and sw 3 to 4 ft. Patchy fog.
Wed..NW winds 10 to 20 kt. Wind waves 3 to 4 ft. Mixed swell nw 3 to 4 ft and sw 3 to 4 ft. Patchy fog.
Thu..NW winds 10 to 20 kt. Wind waves 3 to 5 ft. Mixed swell nw 3 to 5 ft and S around 3 ft. Patchy fog.
PZZ500 154 Pm Pdt Sat Jul 21 2018
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... A weak low pressure system off the coast will produce light to moderate winds over the coastal waters this weekend. Northwesterly winds are then forecast to increase through much of the coming week. Two long period southerly swells will impact the region this weekend and early next week.

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 212153
afdeka
area forecast discussion
national weather service eureka ca
253 pm pdt Sat jul 21 2018

Synopsis Temperatures will not be quite so hot across the
interior valleys this weekend, before returning closer to 100
degrees for the upcoming week. Cooler weather with areas of marine
stratus will be found along the coast, especially south of cape
mendocino. Isolated thunderstorms will impact areas around
trinity county on Sunday.

Discussion Heat and thunderstorm activity over the interior along
with areas of smoke, haze and coastal stratus will continue to be
the forecast challenges... None of which are terribly out of the
ordinary for northwest california in late july. Approaching 2 pm
pdt, a look at the visible satellite reveals mostly clear skies
across the bulk of the interior, with smoke and haze across del norte
and mainly northwest portions of humboldt county. Webcams along
the redwood coast show mainly clear but hazy skies. Coastal
stratus has been persistent along the vast majority of the coast
near and south of CAPE mendocino thus far today. Light winds there
are tending southerly and onshore, with a coastal eddy
circulating a continued supply of stratus up from offshore of
point arena. These coastal clouds and fog may keep the mendocino
coast cloudy for much of the next couple of days, and will try to
begin to peel around CAPE mendocino into humboldt bay tonight.

Expect with northerly winds still offshore and adjacent to the
north side of CAPE mendocino, the bulk of the stratus shield may
struggle to make headway. Still think there will be a bit more
cloudiness along the humboldt coast later tonight into Sunday
morning, perhaps filling in and thickening along the entire
redwood coast by Sunday night.

Meanwhile, the switch to more southerly low-level flow, albeit
still very light, should tend to shift some of the smoke out of
our area, as indicated by the hrrr model. However, expect areas
closest to the nachez fire around del norte county to remain hazy
tomorrow. Otherwise, the focus will shift to a threat of
thunderstorms over eastern and northeastern trinity county on
Sunday afternoon. The models have generally seemed a little bit
too aggressive with mid-level moisture and instability thus far,
though there is some sign of that in ACCAS to our southeast, as
close as napa county. Models indicate much more in the way of
instability and anomalous precipitable water values tomorrow as
this mid-level monsoonal moisture settles in across our area.

However, mid-level lapse rates look fairly poor, with limited
shear and forcing under a strong mid upper-level ridge of high
pressure. The consensus of guidance points toward a couple storms
firing up around the trinity alps or perhaps trinity center, but
for the above reasons, am doubting the storms get very strong or
are more than isolated coverage-wise. Better chances will exist
out of our area, into siskiyou county.

Heat will continue to be an ongoing concern for the interior,
though this weekend is giving us a relative break, with just mid
80s to mid 90s for most. High pressure ridging over the
southwestern united states will build through the middle of the
upcoming week, with the hottest interior valleys 100-105 by
Wednesday. There are few signs of any real relief in this hot
pattern for the foreseeable future.

Aviation All terminals have been experiencingVFR conditions
early this afternoon. Smoke from the wildfires to the north continue
to produce a broken to overcast layer at around 4000 ft with slight
visibility reductions at the surface as well. Hrrr smoke guidance
indicates smoke should remain entrenched across interior del norte
county this evening and through tomorrow however smoke impacts at
acv may begin to lessen. The other forecast concern is the
persistent stratus that has remained south of CAPE mendocino so far
today. Model guidance has been struggling with the stratus which
places low confidence in their solutions for tonight and tomorrow
morning. However, northerly winds continue to decrease as we go
through the afternoon which should allow stratus to begin to round
the CAPE late this afternoon or evening. Southerly winds are
expected to strengthen along the entire coast by tomorrow morning
which means that low clouds and reduced visibilities can be expected
at acv and cec at the latest by late tomorrow morning. Clear skies
will continue to prevail at uki during this cycle. Cumulus clouds
will be on the increase along the interior mountains this afternoon
which may increase turbulence. Wci

Marine The surface thermal trough will continue to pivot across
the southern waters. As a result, northerly winds will continue to
decrease as we go through the afternoon and into the evening. Winds
will remain elevated across the northern outer waters where gale
gusts will remain possible through this evening. Near the coast,
southerly winds will begin to strengthen late tonight and into
tomorrow morning to around 5 to 15 kts. Seas across the outer waters
and northern inner waters will remain steep and hazardous through
Sunday afternoon. Northerly winds will begin to increase again by
the middle of next week. Wci

Fire weather There may still be a small area of northeast del
norte county with enhanced northeast winds tonight, but overall
trends will be better, with lighter winds, and higher rh values.

Temperatures will continue to be hot through the upcoming week,
albiet a little bit of repreive for today and Sunday from the
above 100-degree readings.

Isolated thunderstorms will be an issue around northeastern
trinity county on Sunday, but do not expect abundant lightning at
this time, with more concerns in that department farther north and
northeast into siskiyou county. Thus have held off on any red flag
warnings, but will continue to highlight isolated lightning in the
fwf. See the above discussion section fore some more forecast
reasoning. Might not be able to completely rule out a stray shower
or weak storm around the trinity alps Monday or Tuesday afternoon,
but otherwise it looks like the week ahead will be mostly storm-
free.

Eka watches warnings advisories
Ca... None.

Northwest california coastal waters... Small craft advisory until
3 am pdt Sunday for pzz450.

Gale warning until 9 pm pdt this evening for pzz470.

Small craft advisory until 3 pm pdt Sunday for pzz475.

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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 mi41 min NW 2.9 G 6 60°F 57°F1016.8 hPa
46014 - PT ARENA - 19NM North of Point Arena, CA 39 mi31 min N 3.9 G 7.8 56°F 1016.2 hPa56°F
46263 44 mi41 min 55°F7 ft
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 45 mi31 min WSW 3.9 G 7.8 1016.3 hPa

Wind History for Arena Cove, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Ukiah Municipal Airport, CA20 mi75 minNNE 810.00 miFair88°F57°F35%1012.3 hPa

Wind History from UKI (wind in knots)
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Last 24hrNE4S8S7S7S5CalmS3CalmCalmCalmCalmCalmCalm3S5SE7SE10SE9SE8--SW7S4N84
1 day agoS7SE4SE4S3S3S3S5S4SE3CalmCalmCalmCalmSE6SE13
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2 days agoCalmCalmCalmSE4E3S5CalmCalmCalmCalmSE3SE4CalmCalmSE43SE8SE10SE9SE9W7W7E7S10

Tide / Current Tables for Arena Cove, Pacific Ocean, California
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Arena Cove
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Sat -- 01:32 AM PDT     0.93 feet Low Tide
Sat -- 01:42 AM PDT     Moonset
Sat -- 06:06 AM PDT     Sunrise
Sat -- 07:35 AM PDT     3.79 feet High Tide
Sat -- 12:44 PM PDT     2.00 feet Low Tide
Sat -- 03:34 PM PDT     Moonrise
Sat -- 07:20 PM PDT     5.86 feet High Tide
Sat -- 08:35 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.5111.422.73.43.73.83.532.52.122.32.93.84.75.45.85.85.24.33.1

Tide / Current Tables for Point Arena, California Current
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Point Arena
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Sat -- 01:42 AM PDT     Moonset
Sat -- 02:28 AM PDT     0.00 knots Slack
Sat -- 05:33 AM PDT     0.75 knots Max Flood
Sat -- 06:06 AM PDT     Sunrise
Sat -- 08:20 AM PDT     -0.00 knots Slack
Sat -- 10:44 AM PDT     -0.55 knots Max Ebb
Sat -- 02:15 PM PDT     0.00 knots Slack
Sat -- 03:34 PM PDT     Moonrise
Sat -- 05:17 PM PDT     0.72 knots Max Flood
Sat -- 08:07 PM PDT     -0.00 knots Slack
Sat -- 08:35 PM PDT     Sunset
Sat -- 11:26 PM PDT     -1.07 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.9-0.6-0.20.20.60.70.70.50.2-0.3-0.5-0.5-0.5-0.4-0.10.30.60.70.70.50.1-0.5-0.9-1.1

Weather Map and Satellite Images
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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 (23,6,7,8)
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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.