Wednesday, February20, 2019 L-36.com


Marine Weather and Tides
Grants Pass, OR

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 7:01AMSunset 5:53PM Wednesday February 20, 2019 7:43 AM PST (15:43 UTC) Moonrise 7:29PMMoonset 8:00AM Illumination 99% Phase: Waning Gibbous; Moon at 16 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 251 Am Pst Wed Feb 20 2019
Synopsis for the southern oregon coastal waters..A front will move into the area late tonight into Wednesday. This will bring an area of small craft advisory winds followed by very steep and hazardous seas for most areas. Winds and seas will begin to subside Thursday and more so Friday as high pressure moves through. A weak front will move in Friday afternoon into Friday night. Northwest swell will build behind it Saturday into Saturday night, and seas may become steep.


7 Day Forecast for Marine Location Near Grants Pass, OR
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location: 42.42, -123.35     debug


Area Discussion for - Medford, OR
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Fxus66 kmfr 201209
afdmfr
area forecast discussion
national weather service medford or
409 am pst Wed feb 20 2019

Discussion This frontal boundary has come in somewhat
differently than one would expect a traditional front to behave in
the pacific northwest. Radar and satellite imagery are showing a
more showery nature to the precipitation. This could end up
changing the nature of the snowfall amounts and where the heaviest
snows will occur. Right now, snow levels are generally hovering
between 1500 and 2000 feet. The low elevation passes between
grants pass and roseburg are indicating some periods of heavy snow
per odot and caltrans websites, although it is a bit difficult to
see via the web cameras. Meanwhile, siskiyou summit appears quiet
(this will change as showers move across it). Along and east of
the cascades, however, is a much different story as web cameras
are showing periods of heavy snow, likely orographically enhanced.

This snow is impacting highway 97, and likely impacting the
klamath falls airport. Overall, the main band of heavy
precipitation which we expected to occur over the cascades appears
to have shifted eastward into eastern oregon in association with
the strong winds aloft.

Regardless, rain and showers will continue throughout the day
today, with periods of moderate to heavy snow occurring in any
particular shower. Before the Sun rises, it would not surprise me
to see a particularly heavy shower bring snow to the valley
floors. With daytime heating, expect to see most of the impacts
occur above 2000 feet. Winter headlines (a winter storm warning
for the cascades, and a winter weather advisory for most other
places above 1500 feet) exist until 10 pm tonight. Please see the
wswmfr for more details including amounts.

Additionally, a few showers today could bring graupel (small hail)
to the valley floors, and maybe across highway 101. The shower
pattern will continue through tonight as cold air penetrates back
into the area causing snow levels to crash back to the valley
floors. The showers will come to an end very early tomorrow
morning, but a dusting of snow could be possible in medford.

Then, a relative break is expected Thursday with generally cold
air. Temperatures will be frigid for many areas east of the
cascades with temperatures in the single digits or even below zero
farenheit, and freeze headlines may be needed once again for the
coast for Thursday night into Friday morning.

Another system appears destined for our area again this weekend,
with periods of moderate rain with mountain snows. Snow levels may
be higher as this system appears to have a bit of an atmospheric
river signature, but another low pressure system is dipping south
from british columbia, andit looks to be combining with the excess
moisture. Our snow levels will start off rather low once again,
but may raise to be around 2500 to 3000 feet this weekend. Thus
higher passes like lake of the woods, and siskiyou summit may see
some impactful snow. That being said, this system is still days
away, and snow levels could easily change to where the low passes
become affected as well. Thus, it would be prudent to stay tuned
to the forecast.

Another relatively brief break is expected in the extended portion
of the forecast, but models are indicating yet another system to
reach our area by late next week. -schaaf

Aviation For the 20 12z tafs... Along the coast and into the
umpqua basin (including koth and krbg)... Areas of MVFR
cigs vsbys in low clouds, rain, and rain showers will persist
into Wednesday night with higher terrain obscured. Snow levels will
be 1500 to 2000 feet, dropping to 1000 to 1500 feet late Wednesday
night as the showers diminish. Over the remainder of the west side
(including kmfr)... Areas of ifr MVFR CIGS vsbys in low clouds, rain
and snow will persist into Wednesday night with higher terrain
obscured. Snow levels will be 1500 to 2000 feet, dropping to
around 1000 feet late Wednesday night as the showers diminish.

From the cascades east (including klmt)... Areas of ifr MVFR
cigs vsbys in low clouds, snow, and snow showers will persist into
Wednesday night with areas of higher terrain obscured. Showers will
diminish Wednesday night

Marine Updated 230 am pst Wednesday 20 february 2019... A front
will move into the area tonight into Wednesday. This will bring an
area of small craft advisory winds followed by very steep seas for
most areas. The seas will be a combination of wind driven short
period waves, fresh northwest swell, and longer period northwest
swell. Winds and seas will subside late Thursday but more so Friday
as high pressure moves through. There will probably be a period of
small craft advisory conditions Thursday afternoon and evening south
of CAPE blanco before conditions improve there. A weak front will
move in Friday afternoon into Friday night. Northwest swell will
build behind it Saturday into Saturday night, and seas may become
steep. Details on timing and strength of this front and the
following swell are still uncertain.

Mfr watches warnings advisories
Or... Winter weather advisory until 10 pm pst this evening for
orz029>031.

Winter weather advisory until 10 pm pst this evening above 1500
feet in the for orz024-026.

Winter weather advisory until 10 pm pst this evening above 1500
feet in the for orz023.

Winter storm warning until 10 pm pst this evening for
orz025-027-028.

Winter storm warning until 10 pm pst this evening above 3000
feet in the for orz026.

Winter weather advisory until 10 pm pst this evening for orz028.

Ca... Winter weather advisory until 10 pm pst this evening above 2000
feet in the for caz080-081.

Pacific coastal waters... Small craft advisory for hazardous seas until 10 am pst Thursday
for pzz356.

Hazardous seas warning until 10 am pst Thursday for
pzz350-356-370-376.

Small craft advisory until 4 am pst early this morning for
pzz350-370-376.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CECC1 - 9419750 - Crescent City, CA 64 mi49 min N 2.9 G 5.1 40°F 50°F1016.8 hPa
PORO3 - 9431647 - Port Orford, OR 65 mi43 min NNW 2.9 G 5.1
46027 - ST GEORGES - 8NM West Northwest of Crescent City, CA 68 mi43 min N 18 G 21 46°F 52°F1017.3 hPa (-0.0)45°F

Wind History for Crescent City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Sexton Summit, OR14 mi1.8 hrsNNW 31.25 miFog/Mist28°F26°F92%1013.8 hPa

Wind History from SXT (wind in knots)
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Last 24hrNE63SE4CalmN33CalmNW3CalmCalmSW6W6SW7SW10SW13
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6NW74CalmN3Calm
1 day agoCalmSE3CalmCalm--Calm33Calm456N8N11
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N10NE8--N6N6N7NE7NE5NE5NE7
2 days agoCalmCalmCalmCalmCalmCalm354N10
G17
--3N9N7N8N8N8N7N7N7N8N7N6N7

Tide / Current Tables for Brookings, Chetco Cove, Oregon
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Brookings
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Wed -- 12:13 AM PST     7.04 feet High Tide
Wed -- 05:51 AM PST     1.70 feet Low Tide
Wed -- 07:06 AM PST     Sunrise
Wed -- 08:03 AM PST     Moonset
Wed -- 11:47 AM PST     8.24 feet High Tide
Wed -- 05:56 PM PST     Sunset
Wed -- 06:29 PM PST     -1.11 feet Low Tide
Wed -- 07:33 PM PST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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76.85.84.4321.72.33.55.26.87.98.27.563.91.80-1-101.83.85.7

Tide / Current Tables for Wedderburn, Rogue River, Oregon
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Wedderburn
Click for Map
Wed -- 12:21 AM PST     6.69 feet High Tide
Wed -- 06:03 AM PST     1.56 feet Low Tide
Wed -- 07:07 AM PST     Sunrise
Wed -- 08:04 AM PST     Moonset
Wed -- 11:55 AM PST     7.83 feet High Tide
Wed -- 05:56 PM PST     Sunset
Wed -- 06:41 PM PST     -1.02 feet Low Tide
Wed -- 07:33 PM PST     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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6.66.55.74.4321.61.93.14.66.37.47.87.364.120.3-0.8-1-0.21.43.35.2

Weather Map and Satellite Images
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wmap_P
GOES Local Image of PacificNorthwest    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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Medford, OR (10,2,3,4)
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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.