Thursday, March30, 2017 L-36.com


Marine Weather and Tides
Yreka, CA

Version 3.4
What's New / NOTES
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:54AMSunset 7:35PM Wednesday March 29, 2017 11:44 PM PDT (06:44 UTC) Moonrise 7:13AMMoonset 8:42PM Illumination 8% Phase: Waxing Crescent; Moon at 3 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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This is a Weather Statement Zone, please check the Date to see if it has expired
PZZ330 1126 Pm Pdt Fri Aug 9 2013
.thunderstorms over the waters... Thunderstorms over the waters have weakened but isolated storms will continue overnight. Mariners can expect gusty and erratic winds with the storms along with frequent lightning. If caught on the open water stay below deck if possible...keep away from ungrounded metal objects. Lat...lon 4397 12411 4396 12411 4400 12413 4284 12455 4242 12440 4225 12441 4205 12428 4184 12422 4181 12580 4198 12579 4220 12589 4370 12576 4386 12565 4399 12562 4403 12414
PZZ300 907 Pm Pdt Wed Mar 29 2017
Synopsis for the southern oregon a waters..SEas will remain high and steep through tonight. High pressure will build west of the waters Thursday and Friday bringing north winds. A disturbance moves across the area late Saturday and Sunday. High and very long period west swell is expected this weekend.

7 Day Forecast for Marine Location Near Yreka, CA
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location: 41.75, -122.64     debug


Area Discussion for - Medford, OR
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Fxus66 kmfr 300550
afdmfr
area forecast discussion
national weather service medford or
1050 pm pdt Wed mar 29 2017
updated aviation section

Discussion A surface cold front is pushing east of the cascades
at this time and precipitation is becoming more showery in nature
behind it. So far through early this evening, rain amounts along
the coast have ranged from 0.50-1.50 inches (highest near
brookings) with another maximum around 1.00 inch from the eastern
douglas county foothills to the cascades north of crater lake.

Widespread amounts of 0.10-0.25 of an inch have occurred around
the rogue valley, in northern california and over the east side,
with some higher raws sites over the east side exceeding 0.50 of
an inch.

An upper level trough and associated cold pool will shift through
the area overnight into Thursday morning. With persistent onshore
flow, this will keep showers going over much of the cwa. Snow
levels will drop quickly from near 5500 feet late this evening to
near 3500 feet by Thursday morning. Mostly nuisance snow will
occur in the mountains, but there could be near 6 inches around
crater lake by mid-morning Thursday. There were a handful of
cloud to water lightning strikes beneath the coldest air aloft
(500mb temps of -32c) out just beyond 130 W earlier this evening.

There haven't been any in the last hour or so, but can't rule out
a clap or two of thunder overnight along the north coast and
perhaps in some SE sections of the CWA where the best instability
exists through Thursday morning. Showers should gradually wane
across the area by Thursday evening as the trough axis shifts east
and high pressure builds in from the pacific. -spilde

Aviation 30/06z TAF cycle... Overall, expect MVFR in
showers tonight into Thursday with terrain obscured. Showers
could temporarily lower lower ceilings/visibility to
ifr. Conditions will improve toVFR most areas Thursday afternoon,
but terrain will remain partially obscured. Gusty northwest winds
are expected east of the cascades Thursday afternoon and evening.

Gusts past 35 kt are possible at klmt. -spilde

Marine Updated 300 pm pdt Wednesday 29 march 2017... Long period
west swell will make bar crossings hazardous today. Seas will remain
high and steep through tonight. Winds will decrease this evening and
then veer to the northwest later this afternoon. Winds may reach
advisory strength in the waters south of gold beach Thursday evening
into Saturday. A weakening front moves into the area late Saturday
followed by an upper level disturbance with showers Sunday. High and
very long period west swell is expected to arrive late Saturday into
Sunday. This may bring dangerous bar crossings and possible high
surf to the coast. Sven

Prev discussion /issued 232 pm pdt Wed mar 29 2017/
short term... A cold front is currently working its way across the
west side. It has already dropped a half to three quarters of an
inch of rain from the coast into the umpqua basin. Pressures are
now rising along the coos coast, and winds have shifted to the
southwest, so the front is through there. Rain has been lighter
over the rogue valley, but it is a wet afternoon here as well. The
front will move through the cascades early this evening and then
to the east side late this evening. Snow levels drop rapidly
behind the front and will be down to around 3500 feet by morning.

There will be some nuisance snows in the mountains, but much of
the precipitation will have passed. Nevertheless, higher roads
like 140 could see a few inches and we may see as much as 6 inches
around crater lake.

Residual showers continue into Thursday as the main upper trough
axis moves by. It will be a chilly day area-wide, and breezy to
windy east of the cascades. A wind advisory remains in effect for
much of lake county for Thursday. A brisk northwesterly flow of
cold air will keep snow showers going over the cascades with some
additional accumulations, but it doesn't look like a big deal.

Things dry out for many of us Friday and Saturday as an upper
ridge builds in over the pacnw. We will finally see some above
normal temperatures for a couple of days, and we may even touch 70
in medford on Saturday. Try to enjoy the warmer, quieter weather
Friday and Saturday, because unsettled conditions will quickly
return in the long term. -wright
long term... Sunday through Wednesday... The operational models
are in general agreement for most of the forecast period. A upper
trough will drop into the area on Sunday and could bring
convective precipitation mainly along and east of the cascades
Sunday afternoon. Confidence is not high in terms of where the
best chance of precipitation will be or the amounts, so watch for
updates on this. Weak shortwave ridging will move overhead Monday
with dry and milder weather. Differences in the operational models
show up on Tuesday. The GFS is the most progressive with the
ridge quickly breaking down as a frontal system approaching the
coast Tuesday morning. In contrast the ECMWF and canadian show
more ridging and precipitation staying out of the area through
Tuesday. For now have leaned towards the ecmwf/canadian solution,
but confidence remains low to medium and suspect this will change
in upcoming model runs. Wednesday is a wild card and much will
depend on how the models resolve the pattern for Tuesday. Taking
things at face value the ECMWF and GFS show wetter solutions and
the canadian is drier with more ridging. Given the above mentioned
reasoning, decided not to make any changes next Wednesday
forecast. -petrucelli

Mfr watches/warnings/advisories
Or... Wind advisory from 5 am to 11 pm pdt Thursday for orz031.

Ca... Wind advisory from 5 am to 11 pm pdt Thursday for caz085.

Pacific coastal waters... Small craft advisory for hazardous seas
until 11 am pdt Thursday for pzz350-356-370-376.

Mas/trw/map/sbn


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CECC1 - 9419750 - Crescent City, CA 82 mi44 min NW 8.9 G 12 51°F 55°F1020.5 hPa (+0.3)
46027 - ST GEORGES - 8NM West Northwest of Crescent City, CA 93 mi54 min NW 19 G 23 51°F 54°F9 ft1019.8 hPa (-0.0)

Wind History for Crescent City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Montague Siskiyou County Airport, CA9 mi51 minN 010.00 miLight Rain47°F46°F100%1017.1 hPa

Wind History from SIY (wind in knots)
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Last 24hrS4E4W3CalmSW3E6N3CalmCalmS5CalmS3S3S7SE7SE5NW4NW5E6E5E4SE6SW4Calm
1 day agoNE3N5CalmNE4N3NE5CalmNE3CalmS3CalmCalmCalmNE5NW44CalmNE5NW3W4NW3CalmCalmCalm
2 days agoCalmS3CalmCalmCalmSW3SW6S5CalmCalmCalmS43SW5W8SW6CalmNE6N8N12N10N7NE5NE7

Tide / Current Tables for Crescent City, California
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Crescent City
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Thu -- 01:38 AM PDT     7.46 feet High Tide
Thu -- 07:02 AM PDT     Sunrise
Thu -- 08:07 AM PDT     -0.50 feet Low Tide
Thu -- 08:58 AM PDT     Moonrise
Thu -- 02:24 PM PDT     6.43 feet High Tide
Thu -- 07:40 PM PDT     Sunset
Thu -- 08:10 PM PDT     1.15 feet Low Tide
Thu -- 11:00 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.37.37.46.65.13.31.40.1-0.5-0.212.64.35.66.46.35.54.22.81.71.21.42.43.9

Tide / Current Tables for Brookings, Chetco Cove, Oregon
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Brookings
Click for Map
Thu -- 01:39 AM PDT     7.46 feet High Tide
Thu -- 07:02 AM PDT     Sunrise
Thu -- 08:11 AM PDT     -0.50 feet Low Tide
Thu -- 08:57 AM PDT     Moonrise
Thu -- 02:25 PM PDT     6.43 feet High Tide
Thu -- 07:41 PM PDT     Sunset
Thu -- 08:14 PM PDT     1.15 feet Low Tide
Thu -- 11:01 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.37.37.46.75.23.31.50.1-0.5-0.20.92.54.25.66.46.35.54.22.81.71.21.42.33.8

Weather Map and Satellite Images
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Weather Map
wmap_P
IR Satellite Image from GEOS
west_satellite

GOES Local Image of CentralWestCoast    EDIT
Geos

Wind Forecast for Medford, OR (2,6,7,8)
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Ground Weather Radar Station Medford, OR
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weather_mapweather_map weather_map

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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.