Monday, June18, 2018 L-36.com


Marine Weather and Tides
Etna, CA

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.

Sunrise 5:32AMSunset 8:51PM Sunday June 17, 2018 9:07 PM PDT (04:07 UTC) Moonrise 9:05AMMoonset 11:23PM Illumination 22% Phase: Waxing Crescent; Moon at 5 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
    EDIT      (on/off)   Help
PZZ450 Pt St George To Cape Mendocino Out 10 Nm- 853 Pm Pdt Sun Jun 17 2018
Tonight..S winds 5 to 15 kt. Local gusts to 25 kt near pt st george and cape mendocino. Waves N 6 ft at 6 seconds...and W 5 ft at 12 seconds. Patchy fog.
Mon..SW winds 5 to 10 kt. Waves N 5 ft at 6 seconds...and W 5 ft at 16 seconds.
Mon night..NW winds 5 kt. Waves W 5 ft at 12 seconds. Patchy fog.
Tue..NW winds 5 to 10 kt. Waves N 3 ft at 5 seconds...and W 5 ft at 12 seconds.
Tue night..N winds 5 to 10 kt. Waves N 3 ft at 5 seconds... And W 4 ft at 12 seconds.
Wed..NW winds 5 to 10 kt. Waves nw 4 ft at 5 seconds...and W 4 ft at 11 seconds.
Thu..NW winds 10 to 20 kt. Waves nw 6 ft at 7 seconds...and W 3 ft at 11 seconds.
Fri..NW winds 10 to 20 kt. Waves nw 7 ft at 7 seconds.
PZZ400 853 Pm Pdt Sun Jun 17 2018
Synopsis for northern california waters..Localized strong southerly winds near pt st george and cape mendocino will ease overnight, with seas continuing to lower across the coastal waters. Light winds are expected Monday. North winds return Tuesday, and will gradually increase through the end of the week.

7 Day Forecast for Marine Location Near Etna, CA
   Hourly   EDIT   Help
location: 41.34, -123.02     debug


Area Discussion for - Medford, OR
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus66 kmfr 172136
afdmfr
area forecast discussion
national weather service medford or
236 pm pdt Sun jun 17 2018

Discussion The upper low that brought isolated showers and
thunderstorms yesterday is now east of the cascades. However
instability still exist as cumulus clouds over most of the area
inland away from the coast. The latest radar shows isolated showers
moving from north to northeast to south to southwest.

Instability is expected to be greatest east of the cascades and
that's where the best chance of showers and isolated thunderstorms
will be. Unlike yesterday, the steering flow will be more northerly,
so there's a better chance for storms to remain over the cascades.

However there's still a slight north to northeast component and the
winds are strong enough where a few of these storms could come off
the higher terrain and migrate southwest towards the rogue valley.

Also unlike yesterday, the morning sounding shows little or no cap
and higher precipitable water values (0.76 of an inch), so we think
instability will be higher west of the cascades. The earlier
thinking of keeping a slight chance of thunderstorms along or just
east of interstate 5 looks good. Wetting rains are possible east of
the cascades, but rainfall amounts should not be excessive due to a
stronger steering flow.

On Monday, showers and isolated thunderstorms will shift further
east and we think it should be mainly east of the cascades. However
there is some evidence of marginal instability and moisture along
the cascades, so we'll maintain a slight chance of thunderstorms
there. Meanwhile it will be dry and warmer west of the cascades away
from the coast. Meanwhile the models are indicating marine stratus
will be over the waters and could push slightly inland with weak
onshore flow. The marine stratus should peel back along or just
slightly off the coast in the afternoon.

The upper low will move east of our area Tuesday and at the same
time weak shortwave riding builds into southwest oregon Tuesday
afternoon. Could not rule out a few isolated showers Tuesday
morning in lake county due to weak instability and trigger,
otherwise we'll be dry with a rapid warmup, at least west of the
cascades inland away from the coast with afternoon temperatures
ending up 10-15 degrees above normal. The warm up won't be as
pronounced east of the cascades, that's because of the exiting upper
low and cloud cover wrapping around the backside if it. Also the
marine stratus remains in place, so we'll once again be dealing with
overcast skies in similar locations as Monday in the morning then
retreating at or just off the coast in the afternoon.

The upper ridge builds over the area on Wednesday. The ECMWF shows
an upper trough moving along the ridge and reaching the oregon coast
Wednesday evening. The GFS also shows this, but it is weaker and
slightly faster. Either way, the models show weak instability along
the cascades, so could not rule out an isolated thunderstorms in the
northern cascades and eastward into the chemult crescent area.

Wednesday will be hot as temperatures push into the mid to upper 90s
in the warmest west side and northern california valleys, while east
side areas push into the mid 80s.

One thing of note: ECMWF shows the upper trough strengthening as it
moves inland Wednesday night into Thursday morning and cracks out
some QPF over portions of our area. The GFS shows weak energy moving
into the area with QPF Wednesday night. Instability is marginal and
mid level moisture is lacking, therefore not as confident we'll get
anything from this other than a mid level cloud deck.

Slight cooling is expected Thursday and Friday with a weak west to
northwest flow and light to moderate onshore flow, then we'll heat
up again Saturday as ridging builds over the area. This won't last
long as an upper trough approaches the area Sunday with increasing
onshore flow. -petrucelli

Aviation For 17 18z tafs... Stratus fog will return to the
coast north of CAPE blanco again this evening. Elsewhere, conditions
will generally beVFR through the TAF period. However, showers and
thunderstorms are expected to develop this afternoon and evening
east of a line from roseburg to grants pass. These storms will be
capable of producing gusty and erratic outflow winds, brief heavy
rain, and brief MVFR ceilings and visibility in and near the cores.

-dw

Marine Updated 130 pm pdt Sunday 17 june 2018... North winds have
continuing to diminish this afternoon as the trough weakens and
moves inland. As a result, winds are expected to drop below small
craft advisory levels after 00z except for a very small portion
south of brookings between 6 and 10 nm out to sea. The winds will
decrease below advisory levels by sunset. That being said,
guidance is now showing that the combination of wind waves and
fresh swell will keep steep, small craft advisory level waves over
the next 24 hours, and have changed the small craft advisory to a
small craft advisory for seas. Conditions improve for all areas
by tomorrow night tonight, and relatively light winds and low seas
are expected Monday through at least Wednesday. -schaaf

Fire weather The cut-off upper low continues to wrap moisture
around it into our area today. This is bringing an unstable air mass
to the region and cells are building over the region. With northeast
steering flow and instability to the east storms are on the west side
as well. The upper low then slowly begins to migrate northeast
moving over extreme SE oregon by Monday morning. The upper low then
slowly wobbles east Monday with thunderstorms over cascades and the
east side. An upper ridge will build in behind the exiting upper low
Tuesday, bringing a dramatic warmup and a drying pattern into mid
week. Sven

Mfr watches warnings advisories
Or... None.

Ca... None.

Pacific coastal waters... Small craft advisory until 5 pm pdt this afternoon for
pzz356-376.

Small craft advisory for hazardous seas until 5 pm pdt Monday
for pzz350-356-370-376.



Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map
Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CECC1 - 9419750 - Crescent City, CA 68 mi49 min S 20 G 28 53°F1013.4 hPa
HBYC1 - 9418767 - North Spit, CA 75 mi91 min WSW 12 G 15 52°F 51°F1015.5 hPa
46244 - Humboldt Bay, North Spit, CA 77 mi67 min 53°F6 ft

Wind History for Crescent City, CA
(wind in knots)    EDIT      (on/off)   Help
9
PM
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
Last
24hr
N12
G15
N12
N11
G14
N9
N7
N7
G12
N7
G12
NE4
N7
N5
N6
G9
N8
SE4
SE3
G6
S4
S4
SE2
G8
N11
G18
N11
G15
N10
G17
N4
G11
S16
G22
S22
S23
1 day
ago
N14
G20
N15
G20
N9
G18
N9
N14
G20
N12
N10
G13
N12
G15
N9
G15
N10
G17
N13
G17
N12
G19
N12
G23
N12
G20
N13
G20
N17
G25
N16
N16
G21
N15
G26
N17
G24
N16
G27
N12
G20
N15
G21
N12
G19
2 days
ago
N2
--
--
SE3
S4
N9
G17
N14
G18
N12
G17
N15
G20
N14
G22
N15
G24
N14
G23
N20
G28
N19
G25
N16
G23
N16
G20

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Mount Shasta, CA37 mi11 minN 010.00 miFair58°F45°F62%1015.3 hPa

Wind History from MHS (wind in knots)
10
PM
11
PM
12
AM
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
Last 24hr554E3N4Calm445N4CalmCalm--NW7
G15
NW74N8
G17
66--44W4Calm
1 day agoW83664Calm3CalmCalmCalm3Calm--5NW7
G15
NW9
G16
NW9
G15
6NW736555
2 days ago363CalmCalm4CalmCalmCalm334564NW7NW76--36NW7
G14
N74

Tide / Current Tables for Trinidad Harbor, California
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Trinidad Harbor
Click for Map
Mon -- 12:26 AM PDT     Moonset
Mon -- 03:19 AM PDT     6.54 feet High Tide
Mon -- 05:43 AM PDT     Sunrise
Mon -- 10:15 AM PDT     -1.11 feet Low Tide
Mon -- 11:21 AM PDT     Moonrise
Mon -- 05:06 PM PDT     6.02 feet High Tide
Mon -- 08:51 PM PDT     Sunset
Mon -- 10:45 PM PDT     2.30 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.9566.56.45.54.12.40.8-0.5-1.1-0.901.53.14.65.665.8543.12.52.3

Tide / Current Tables for Arcata Wharf, Humboldt Bay, California
   EDIT      (on/off)   Help   One Week of Data
Arcata Wharf
Click for Map
Mon -- 12:26 AM PDT     Moonset
Mon -- 04:17 AM PDT     6.93 feet High Tide
Mon -- 05:44 AM PDT     Sunrise
Mon -- 11:13 AM PDT     -1.03 feet Low Tide
Mon -- 11:21 AM PDT     Moonrise
Mon -- 06:05 PM PDT     6.20 feet High Tide
Mon -- 08:50 PM PDT     Sunset
Mon -- 11:39 PM PDT     2.51 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.34.45.56.46.96.85.94.42.70.9-0.4-1-0.80.21.73.34.75.86.25.95.24.23.32.6

Weather Map and Satellite Images
       (on/off)   HelpWeather Map
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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Medford, OR (0,6,7,8)
      (on/off)   Help

Ground Weather Radar Station Medford, OR
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

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.