Wednesday, August21, 2019 L-36.com


Marine Weather and Tides
Boonville, CA

Version 3.4
NOTICE
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:30AMSunset 8:01PM Wednesday August 21, 2019 9:15 AM PDT (16:15 UTC) Moonrise 10:24PMMoonset 11:11AM Illumination 65% Phase: Waning Gibbous; Moon at 21 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- 839 Am Pdt Wed Aug 21 2019
.small craft advisory in effect through Thursday evening...
Today..NW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 4 to 5 ft. NW swell 2 to 4 ft at 11 seconds.
Tonight..NW winds 15 to 25 kt with gusts up to 30 kt. Wind waves 4 to 5 ft. W swell 5 to 7 ft at 12 seconds.
Thu..NW winds 15 to 25 kt with gusts up to 30 kt. W swell 6 to 8 ft at 11 seconds and sw around 2 ft at 20 seconds.
Thu night..NW winds 15 to 20 kt with gusts up to 25 kt. NW swell 6 to 8 ft at 10 seconds and sw around 2 ft at 18 seconds.
Fri..SE winds 10 to 15 kt. NW swell 6 to 8 ft at 10 seconds and sw around 2 ft at 18 seconds.
Fri night..SE winds 5 to 10 kt. NW swell 4 to 6 ft at 10 seconds and sw around 2 ft at 16 seconds.
Sat..W winds 5 to 10 kt. Wind waves 2 to 3 ft. NW swell 3 to 5 ft and sw around 2 ft.
Sun..NW winds 5 to 10 kt. Wind waves 2 to 3 ft. W swell 3 to 4 ft and sw around 2 ft.
PZZ500 839 Am Pdt Wed Aug 21 2019
Synopsis for the central california coast and bays including the Monterey bay..Greater farallones...and cordell bank national marine sanctuaries... Light to moderate northwest winds will persist across the coastal waters through mid-week as high pressure sits over the eastern pacific and low pressure develops over central california. Locally gusty coastal jets are forecast south of point arena, pigeon point, and point sur that will create hazardous seas conditions for smaller vessels. Breezy afternoon and evening winds are also forecast over the san francisco bay as well as over the Monterey bay. Mixed seas will continue with shorter period northwest waves at around 8 to 10 seconds, a light longer period west swell, and a light southerly swell.


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 211038
afdeka
area forecast discussion
national weather service eureka ca
338 am pdt Wed aug 21 2019

Synopsis Light rain is forecast to spread across del norte and
northern humboldt county this afternoon and evening. Otherwise,
seasonable temperatures are expected across the region today,
followed by warmer weather over the interior occurring from
Thursday into early next week.

Discussion An upper trough extended south from sern alaska
early Wednesday morning, while an upper low was centered roughly
1200 miles west of CAPE mendocino. Both of these features were
entraining rich moisture, characterized by pw values near 5
standard deviations above climo, into their circulations... With
that moisture subsequently spreading east toward oregon and
northwestern california. In addition, model guidance shows a weak
surface front approaching the eka CWA from the north later this
afternoon. The combination of increasing moisture and modest
ascent will be sufficient for a deep layer of saturation over del
norte county resulting in light rainfall during the afternoon and
evening. The southern extent of the rain is currently expected to
be mckinleyville, with mid and high-level cloudiness occurring
across the remainder of nwrn ca.

Lingering rain will dissipate this evening, followed by stratus
spreading south along the coast tonight. Model guidance shows the
stratus potentially dissipating during part of Thursday afternoon
and evening, with redevelopment occurring on Friday. Farther
inland, the combination of modest mid upper-level height rises and
warming boundary layer temperatures (850 mb temperatures in excess
of 20 c) will support warm to locally hot conditions across
interior valleys from Thursday and beyond... With the hottest
temperatures (90s to low 100s) forecast to occur early next week.

Jmg

Aviation Mid level clouds are spreading east across the region
early Wednesday morning in advance of an upper-level disturbance.

Ceilings are forecast to lower to around 1000-2000 feet at kcec by
early afternoon, and will be accompanied by light rainfall lasting
through Wednesday evening. Farther south, a few sprinkles will be
possible in the vicinity of humboldt bay, but accumulating
rainfall is not expected. Elsewhere, mid-level clouds are probable
across the interior... ButVFR conditions will still prevail.

Jmg

Marine Marine conditions will remain relatively tranquil today
ahead of an approaching cold front, with light winds and low but
building seas. A mid period swell around 7 feet at 12 seconds will
begin to enter the waters later this morning eventually affecting
all of the waters by this afternoon. As the cold front moves
inland this evening, high pressure will begin to build in behind
it leading to rapidly increasing northerly winds and seas. By
daybreak on Thursday, fresh to strong northerly breezes will be in
place across the outer waters therefore small craft advisories
have been hoisted for these zones. Pressure gradient will increase
even more Thursday afternoon leading to near gale northerlies for
the northern outer waters so a gale watch has been issued from
late Thursday morning through late Thursday night. The southern
outer waters will have slightly weaker winds therefore have issued
a hazardous seas watch instead due to very steep seas of 11-13
feet at 10 seconds. Seas will also increase in the near coastal
waters Thursday afternoon as well so additional headlines will be
required for these zones in later forecasts. The strong
northerlies and steep seas will persist through Friday before a
slight lull occurs for the weekend. Yet another round of strong
northerlies is expected early next week. Wci

Eka watches warnings advisories
Ca... None.

Northwest california coastal waters... Gale watch from Thursday
afternoon through late Thursday night for pzz470.

Small craft advisory from 3 am to 3 pm pdt Thursday for pzz470.

Small craft advisory from 3 am to 9 pm pdt Thursday for pzz475.

Hazardous seas watch from Thursday evening through Friday
afternoon 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 mi46 min WNW 2.9 G 6 62°F 52°F1016.6 hPa
46014 - PT ARENA - 19NM North of Point Arena, CA 39 mi26 min NNW 3.9 G 3.9 57°F 53°F3 ft1016.8 hPa56°F
46013 - Bodega Bay - 48NM North Northwest of San Francisco, CA 45 mi26 min NW 18 G 19 54°F4 ft1015.2 hPa

Wind History for Arena Cove, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Ukiah Municipal Airport, CA20 mi80 minN 010.00 miFair59°F51°F75%1016 hPa

Link to 5 minute data for KUKI

Wind History from UKI (wind in knots)
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Last 24hrCalmCalm34E5N74--N6N9N8N6N5CalmCalmCalmCalmCalmNW3CalmCalmCalmCalm3
1 day agoCalmCalmSE4SE7SE10SE10S8
G17
W7NE9NE7N5N4CalmCalmCalmNE3CalmCalmCalmCalmCalmCalmSE3Calm
2 days agoS566SE6SE8
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SE105SW7NE7NE5N5E3CalmCalmS5S6S4S4S6CalmS4S3SE4SE4

Tide / Current Tables for Arena Cove, California (2)
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Arena Cove
Click for Map
Wed -- 03:07 AM PDT     4.38 feet High Tide
Wed -- 06:33 AM PDT     Sunrise
Wed -- 09:17 AM PDT     1.79 feet Low Tide
Wed -- 12:12 PM PDT     Moonset
Wed -- 03:39 PM PDT     5.34 feet High Tide
Wed -- 08:01 PM PDT     Sunset
Wed -- 10:21 PM PDT     1.81 feet Low Tide
Wed -- 11:25 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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33.74.14.44.33.93.22.62.11.81.92.43.144.75.25.354.33.52.72.11.81.9

Tide / Current Tables for Point Arena, California Current
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Point Arena
Click for Map
Wed -- 01:17 AM PDT     0.67 knots Max Flood
Wed -- 04:18 AM PDT     -0.00 knots Slack
Wed -- 06:33 AM PDT     Sunrise
Wed -- 07:10 AM PDT     -0.83 knots Max Ebb
Wed -- 10:19 AM PDT     0.00 knots Slack
Wed -- 12:12 PM PDT     Moonset
Wed -- 01:31 PM PDT     0.72 knots Max Flood
Wed -- 04:34 PM PDT     -0.00 knots Slack
Wed -- 07:40 PM PDT     -0.97 knots Max Ebb
Wed -- 08:01 PM PDT     Sunset
Wed -- 11:23 PM PDT     0.00 knots Slack
Wed -- 11:25 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.50.70.60.40.1-0.3-0.6-0.8-0.7-0.4-0.10.20.50.70.70.50.2-0.2-0.6-0.9-1-0.7-0.4-0.1

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 (12,3,4,5)
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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.