Friday, August23, 2019 L-36.com


Marine Weather and Tides
Etna, 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 6:25AMSunset 8:01PM Friday August 23, 2019 2:50 PM PDT (21:50 UTC) Moonrise 11:26PMMoonset 1:17PM Illumination 42% Phase: Third Quarter Moon; Moon at 23 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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PZZ450 Pt St George To Cape Mendocino Out 10 Nm- 243 Pm Pdt Fri Aug 23 2019
.small craft advisory in effect through Saturday morning...
Tonight..W winds 5 to 15 kt. Waves nw 7 ft at 8 seconds...and W 2 ft at 12 seconds. Patchy fog.
Sat..NW winds 5 to 10 kt. Waves nw 6 ft at 7 seconds...and W 3 ft at 13 seconds.
Sat night..NW winds 5 kt. Waves N 5 ft at 9 seconds...and sw 2 ft at 15 seconds.
Sun..NW winds 5 to 10 kt. Waves nw 5 ft at 9 seconds.
Sun night..N winds 5 to 10 kt. Waves nw 7 ft at 8 seconds.
Mon..N winds 5 to 10 kt. Waves nw 6 ft at 9 seconds.
Tue..SW winds 5 kt. Waves nw 6 ft at 9 seconds.
Wed..S winds 5 kt. Waves nw 4 ft at 8 seconds.
PZZ400 243 Pm Pdt Fri Aug 23 2019
Synopsis for northern california waters..Northerly winds have begun to diminish today, but will persist into next week. Closer to the coast, northerly winds will become southerly in some locations, especially overnight. Also, steep short period waves will create hazardous ocean conditions for small craft through at least Saturday morning for the inner waters.


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


Area Discussion for - Medford, OR
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Fxus66 kmfr 231628
afdmfr
area forecast discussion
national weather service medford or
928 am pdt Fri aug 23 2019

Update
The forecast for this morning into early afternoon has been
updated to better reflect fog and low clouds along and near the
coast and across douglas county.

Discussion
Cool temperatures this morning combined with lingering low level
and ground moisture from recent rainfall have resulted in quite a
bit of low clouds and fog across NW portions of the area this
morning. These low clouds and fog are lingering across SE douglas
county and portions of the coquille and umpqua river valleys. It
is likely to take until early afternoon for this to completely
dissipate. Otherwise, a warming trend will continue today, then
tail off a bit over the weekend, before ramping up, likely, to the
highest temperatures of the year Tuesday into Wednesday. Btl

Aviation For the 23 12z tafs... Along the coast, in the coastal
valleys, and over the coastal waters... Isolated ifr CIGS vsbys in
low clouds and fog will clear toVFR by mid-morning Friday.VFR
conditions will then prevail into Friday evening, then areas of ifr
cigs vsbys in low clouds and fog will develop Friday night,
persisting into Saturday morning. Over the remainder of the
area...VFR conditions will prevail into Saturday morning, except for
patchy ifr CIGS over the umpqua basin that will clear toVFR by late
Friday morning.

Marine Updated 915 am pdt Friday, 23 august 2019...

a thermal trough along the coast will continue to result in gusty
north winds today. Seas will remain very steep south of CAPE blanco,
with steep seas elsewhere. A frontal system moving through north of
the area Saturday will brush by resulting in some decrease in winds
and seas. Small craft advisory conditions are expected south of cape
blanco Saturday into Saturday night. After that, winds will
strengthen again Sunday with an area of gales possible again south
of CAPE blanco from late Sunday morning through Monday evening. The
thermal trough is expected to push inland and weaken Tuesday
allowing conditions to improve along and near the coast. Btl

Fire weather Updated 300 am pdt Friday 23 august 2019...

there was little change made to the forecast, mainly fine tuning of
the relative humidity forecast. A strong warming and drying trend
will begin today. The warmest and driest conditions are likely on
Tuesday, but improvement during the remainder of next week will be
barely noticeable.

While the passage of a weak, dry cold front on Saturday will not
bring any cooling, it will bring gusty westerly winds east of the
cascades with afternoon and evening speeds stronger than normal at
12 to 18 mph with gusts up to 25 mph.

Associated with the warming and drying trend will be night into
morning northeast winds of 5 to 15 mph over the coast range with
moderate mid slope and ridge humidity recoveries tonight through
Monday night.

The air mass will remain stable at least through Tuesday night, and
likely through Thursday morning. Model uncertainty increases beyond
day 5 with differences in the track of a closed low over the
pacific. -dw

Prev discussion issued 310 am pdt Fri aug 23 2019
discussion... 23 00z nam GFS ec in.

Mostly clear skies prevail across the area this morning, except for
patches of low clouds and fog along the coast north of CAPE blanco,
in the coquille valley, and in the umpqua basin.

An upper ridge is building over the area along with a thermal
trough offshore. A strong warming trend will affect all areas
through Friday. By that time highs will be 5-10 degrees above
normal.

Short waves moving over the top of the ridge will keep it from
building any further this weekend, and this will put the brakes
on the warming trend. Saturday and Sunday highs will be about the
same as the Friday highs. A dry cold front will move through
Saturday. It won't bring any cooling, but it will bring gusty
winds to the east side Saturday afternoon and evening.

The ridge will build in more strongly next week, and the thermal
trough will move inland. That's when it will get really hot over
the area. Another strong warming trend will occur Monday into
Tuesday, and the Tuesday highs will be 10-15 degrees above normal.

The medford high will be near 100 degrees Monday and will exceed
it Tuesday. Wednesday will be similar to Tuesday with mostly clear
skies and hot temperatures.

At some point the ridge will break down and the possibility of
thunderstorms will enter the forecast with slightly cooler
temperatures. The latest GFS run continues to show that lis will
remain positive Wednesday afternoon and evening with pws of around
0.66 inches, which is too stable and marginally dry. However, on
Thursday afternoon and evening there is a significant area of
negative lis from around crater lake southeast through the east
side, and the pws rise to 0.75 to 1.0 inches. That is sufficient
for thunderstorm activity and thus will keep the current forecast
of a slight chance of thunder at that time and location.

Mfr watches warnings advisories
Or... None.

Ca... None.

Pacific coastal waters...

- small craft advisory until 5 am pdt Sunday for pzz356-376.

- hazardous seas warning until 5 am pdt Saturday for pzz356-376.

- small craft advisory until 5 am pdt Saturday for pzz350-370.

Btl dw jrs


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CECC1 - 9419750 - Crescent City, CA 68 mi56 min SW 5.1 G 6 56°F 54°F1010.4 hPa
HBYC1 - 9418767 - North Spit, CA 75 mi74 min 60°F1010.5 hPa
46244 - Humboldt Bay, North Spit, CA 77 mi50 min 55°F8 ft

Wind History for Crescent City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Mount Shasta, CA37 mi1.9 hrsN 010.00 miFair84°F46°F27%1012.6 hPa

Link to 5 minute data for KMHS

Wind History from MHS (wind in knots)
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Last 24hr434333533CalmCalmCalmNE33CalmNE3NE3E3--34CalmCalmCalm
1 day agoCalmCalmCalm344------4434Calm33345--5464
2 days agoCalm3CalmCalm3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmNE3CalmCalm3CalmCalmCalmNW56

Tide / Current Tables for Trinidad Harbor, California
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Trinidad Harbor
Click for Map
Fri -- 06:01 AM PDT     4.38 feet High Tide
Fri -- 06:34 AM PDT     Sunrise
Fri -- 07:58 AM PDT     Last Quarter
Fri -- 11:11 AM PDT     2.76 feet Low Tide
Fri -- 02:21 PM PDT     Moonset
Fri -- 05:41 PM PDT     6.04 feet High Tide
Fri -- 08:03 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.61.82.43.13.84.24.44.23.93.432.82.93.344.85.55.965.74.942.92

Tide / Current Tables for Arcata Wharf, Humboldt Bay, California
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Arcata Wharf
Click for Map
Fri -- 12:59 AM PDT     1.54 feet Low Tide
Fri -- 06:34 AM PDT     Sunrise
Fri -- 07:03 AM PDT     4.58 feet High Tide
Fri -- 07:58 AM PDT     Last Quarter
Fri -- 12:24 PM PDT     2.76 feet Low Tide
Fri -- 02:20 PM PDT     Moonset
Fri -- 06:43 PM PDT     6.50 feet High Tide
Fri -- 08:03 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.81.51.82.43.23.94.44.64.54.13.63.12.82.83.34.155.96.46.56.15.44.43.3

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 Medford, OR (17,4,5,8)
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Ground Weather Radar Station Medford, OR
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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.