Friday, April27, 2018 L-36.com


Marine Weather and Tides
Yoncalla, OR

Version 3.4
What's New / NOTES
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.
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.

Sunrise 6:10AMSunset 8:11PM Thursday April 26, 2018 9:28 PM PDT (04:28 UTC) Moonrise 3:43PMMoonset 3:56AM Illumination 90% Phase: Waxing Gibbous; Moon at 12 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
PZZ310 Coos bay bar- coastal waters from cape blanco or to pt. St. George ca out 10 nm- waters from cape blanco or to pt. St. George ca from 10 to 60 nm- 134 pm pdt Wed may 29 2013 a long-duration moderate to strong north wind event is expected to last from this weekend into early next week. Winds should begin to increase Friday into Saturday...peaking Sunday with storm force wind gusts possible. Very steep and hazardous waves will accompany this wind event and mariners should prepare for dangerous conditions at sea. The strongest winds and highest seas will occur beyond 5 nm from shore.
PZZ300 830 Pm Pdt Thu Apr 26 2018
Synopsis for the southern oregon coastal waters..Weak surface low pressure over the waters will persist into Saturday night. Scattered showers are possible during this interval, but winds and seas will remain below small craft criteria. High pressure will build in from the west Sunday, and small craft conditions are possible early next week as northerly winds increase.

7 Day Forecast for Marine Location Near Yoncalla, OR
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location: 43.54, -123.35     debug


Area Discussion for - Medford, OR
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Fxus66 kmfr 270244
afdmfr
area forecast discussion
national weather service medford or
744 pm pdt Thu apr 26 2018

Discussion Today was another warm day but with no daily records
for real-time reporting sites. Afternoon readings away from the
coast were about 15 to 20 degrees above normal. We've recorded
about 30 lightning strikes in the forecast area so far this
evening, focused over northern klamath county, a climatologically-
favored area. Instability is acting upon weak triggers to bring
the current thunderstorms to the area. Deep southeast flow could
bring a storm or two into the rogue valley this evening before the
sun GOES down. Storms should diminish this evening and
transition towards showers. Tonight, instability decreases but
favorable dynamics increase as a vorticity maximum arrives from
the southwest. This will maintain the chance for showers mainly
from the cascades westward.

The air mass cools off sharply tomorrow, and afternoon
temperatures will lower by 20 degrees compared to today. Shower
chances for the cascades westward tomorrow are much better overall
compared to today. Models continue to show the most "showery" day
to be Saturday as the upper low moves overhead. Please see the
forecast discussion below for more details on the cooldown and
then eventual return to warmer conditions late next week.

Aviation 27 00z TAF cycle... Along the coast and over the coastal
waters... A mix of MVFR ifr CIGS will persist through Friday morning,
clearing toVFR along the immediate coast Friday afternoon. The
lower conditions will spread back onshore Friday evening. There will
also be embedded showers. Over the umpqua basin... A mix of MVFR ifr
cigs near the coast will spread into the basin later tonight with
higher terrain becoming obscured. The lower conditions will burn
back to near the coast by late Friday morning. There will also be
embedded showers. Over the remainder of the area...VFR conditions
will prevail, but there will be some obscuration of higher terrain
near scattered showers. There will also be isolated thunderstorms
through this evening and again Friday afternoon and evening.

Marine Updated 800 pm pdt Thursday 26 april 2018... Weak surface
low pressure over the waters will persist into Saturday night.

Scattered showers are possible during this interval, but winds
and seas will remain below small craft criteria. High pressure
will build in from the west Sunday, and small craft conditions
are possible early next week as northerly winds increase.

Prev discussion issued 258 pm pdt Thu apr 26 2018
short term...

showers and some rumbles of thunder are possible this evening as
the low to the west continues to approach the coast line. However,
the exact area where they may form is still up for discussion.

We're watching some moisture and what appears to be an elevated
cold front move towards the coast line this evening. This
should provide some weak vertical motion to get storms started.

Most of the potential instability appears to be maxamized along
the cascades. Looking at satellite again, we can see some cumulus
clouds forming under these elevated clouds. This situation
suggests that convection will really have a hard time kicking off.

With all that being said, most of the models seem the most bullish
of some lightning and stronger convective activity near the
crater lake area and locations near chemult and crescent around 3z.

After we move past the activity this evening, rain showers should
pick up along that cold boundary. We'll see scatted to widespread
rain showers then move north towards along this boundary into
portland's area.

The potential for showers and some thunder will continue through
the weekend. The colder temperatures in the low aloft and warmer
surface temperaures will naturally create a convective
environment. The best chance for lightning for all these days will
be east of the cascades. Most of the bufr soundings suggests just
some rumbles of thunder instead of organized thunderstorms with
only 200-400 j kg of skinny cape.

The last story here is the colder temperatures for this weekend
and the start of the work week. High temperatures are expected in
the lower 60's for valleys west of the cascades. These high
temperatures are roughly 5 degrees below normal for this time of
year. However, the roller coaster ride of spring will continue as
we rise back into the 70's towards the tail end of next week.

-smith
long term... Monday through Thursday night..The region will be on
the back side of the trough on Monday with residual low level
moisture in a cool to cold northerly flow. Very light lingering
showers and mountain snow showers Monday will be diminishing and
mainly west and north of the rogue valley. The next ridge will build
in from the west Tuesday into Wednesday with a strong warming and
drying trend.

-schaaf weygand

Mfr watches warnings advisories
Or... None.

Ca... None.

Pacific coastal waters... None.

Nsk bms jrs


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CHAO3 - 9432780 - Charleston, OR 54 mi53 min SW 1.9 G 5.1 52°F1015.4 hPa

Wind History for Charleston, OR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Roseburg Regional Airport, OR21 mi36 minN 810.00 miFair55°F46°F72%1014.3 hPa

Wind History from RBG (wind in knots)
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Last 24hrN3CalmCalmCalmCalmCalmCalmCalmN6N6N9N7N8N8N7N8N7N10NW12N8NW10
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1 day agoCalmCalmCalmCalmCalmCalmN3CalmCalmCalmCalmCalmCalmCalmCalmCalmNE44N8N8NW10
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2 days agoCalmN3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmSW6CalmW5W444N75NW6NE5

Tide / Current Tables for Reedsport, Umpqua River, Oregon
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Reedsport
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Fri -- 12:09 AM PDT     6.62 feet High Tide
Fri -- 05:28 AM PDT     Moonset
Fri -- 06:14 AM PDT     Sunrise
Fri -- 06:33 AM PDT     0.56 feet Low Tide
Fri -- 12:27 PM PDT     6.02 feet High Tide
Fri -- 05:53 PM PDT     Moonrise
Fri -- 06:39 PM PDT     0.49 feet Low Tide
Fri -- 08:14 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.66.45.54.22.71.40.70.61.32.645.25.95.95.24.12.71.40.60.51.22.54.15.6

Tide / Current Tables for Gardiner, Umpqua River, Oregon
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Gardiner
Click for Map
Fri -- 05:28 AM PDT     Moonset
Fri -- 06:14 AM PDT     Sunrise
Fri -- 06:22 AM PDT     0.51 feet Low Tide
Fri -- 12:15 PM PDT     5.77 feet High Tide
Fri -- 05:53 PM PDT     Moonrise
Fri -- 06:26 PM PDT     0.41 feet Low Tide
Fri -- 08:14 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
6.465.13.72.31.10.60.71.52.74.15.25.75.64.83.62.21.10.50.51.32.74.35.7

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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Wind Forecast for Medford, OR (0,6,7,8)
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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.