Thursday, January18, 2018 L-36.com


Marine Weather and Tides
Ronald, WA

Version 3.4
What's New / NOTES
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.
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.

Sunrise 7:39AMSunset 4:45PM Wednesday January 17, 2018 9:47 PM PST (05:47 UTC) Moonrise 8:04AMMoonset 5:37PM Illumination 2% Phase: Waxing Crescent; Moon at 1 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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PZZ135 Puget Sound And Hood Canal- 832 Pm Pst Wed Jan 17 2018
.small craft advisory in effect through late Thursday night...
Tonight..S wind 20 to 30 kt easing to 15 to 25 kt after midnight. Wind waves 3 to 5 ft. Rain in the evening then showers after midnight.
Thu..S wind 15 to 25 kt. Wind waves 2 to 4 ft. Showers likely in the morning then showers in the afternoon.
Thu night..S wind 15 to 25 kt. Wind waves 2 to 4 ft. Showers likely.
Fri..S wind 15 to 25 kt. Wind waves 2 to 4 ft.
Fri night..S wind 15 to 25 kt. Wind waves 2 to 4 ft.
Sat..S wind 5 to 15 kt becoming sw 10 to 20 kt in the afternoon. Wind waves 1 to 3 ft.
Sat night..S wind 15 to 25 kt. Wind waves 2 to 4 ft.
Sun..S wind 15 to 25 kt. Wind waves 2 to 4 ft.
Mon..SW wind 10 to 20 kt becoming S 5 to 15 kt. Wind waves 1 to 3 ft.
PZZ100 832 Pm Pst Wed Jan 17 2018
Synopsis for the northern and central washington coastal and inland waters..A deep and expansive low centered near 50n 134w will fill as it moves slowly east toward the northern tip of vancouver island Friday night. Tight pressure gradients associated with this low will give gales to the coastal waters and small craft advisory conditions to the inland waters tonight through Thursday night. Combined seas in excess of 25 to 30 feet will affect the coastal waters late tonight through Thursday night. A weak ridge will build into the waters on Saturday. Additional fronts will reach the waters Sunday through early next week.

7 Day Forecast for Marine Location Near Ronald, WA
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location: 47.25, -121.08     debug


Area Discussion for - Pendleton, OR
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Fxus66 kpdt 180523
afdpdt
area forecast discussion
national weather service pendleton or
923 pm pst Wed jan 17 2018
updated aviation discussion

Short term Tonight and Thursday... An upper level trough in the
eastern pacific with a closed low off the coast of canada will
slowly move eastward over the next 24 hours. This will push a cold
front across the forecast area. Currently the front stretches from
northeast washington back to western oregon and will be exiting the
forecast area late Thursday. The front will slowly move a band of
precipitation eastward with initial snow levels at 7000 feet. Snow
levels will lower behind the front late Thursday to around 2000 feet
but. However, limited precipitation behind the front in the colder
air means no significant snow accumulations. Main impact of the
front will be the rainfall and the windy conditions ahead of the
front. Wind advisories have been issued for some zones through
tonight.

Aviation 06z tafs... A cold front will move through the
region overnight and Thursday with a slow moving band of rain.

Cigs will lower to around 040-060 during the rain band with vsby
remainingVFR. Some windy conditions with gusts 30 to 50 kts will
precede the front mainly at kpdt and kalw and then decrease behind
the front early Thursday.

Prev discussion issued 306 pm pst Wed jan 17 2018
short term... Tonight through Saturday. A deep upper low centered
near 48n 135w will track east-northeast toward northern b.C.

Tonight. The low will force a strong cold front east of the cascades
tomorrow. Surface winds ahead of the front are gusting to 45-50 mph
in the southern grande ronde valley, and a wind advisory was issued
earlier for this area in effect until 8 am thurs morning. Gusts to
35-45 mph will continue in the northern grande ronde valley and just
along the base of the or blue mountain foothills east of milton-
freewater and pendleton tonight, and these winds are just shy of
advisory criteria.

The cold front is well organized, and QPF amounts of 0.25-0.6 inch
are forecast for most of the area ahead of the front. Snow levels
will also lower significantly behind the front. Snow levels will
range from 4500-5500 feet early Thursday morning lowering to 2500-
3500 feet behind the front Thursday afternoon and evening. The
front will approach the eastern slopes of the wa or cascades around
sunrise, across the basin and the columbia deschutes plateau during
the morning, then across the remainder of the forecast area during
the afternoon. Despite the cold air and lowering snow levels,
precipitation will taper off behind the front. From Thursday night
through Friday morning, precipitation will mainly be orographic
mountain snow showers with around 1-3 inches of accumulation in the
populated mountain areas and around 5-10 inches over the highest
peaks of the elkhorns, wallowa mountains, and the strawberry
wilderness.

From Friday through Saturday, there will be two weak shortwave
troughs bringing scattered snow showers over the mountains and
isolated snow showers elsewhere. Elevations below 2500 feet will see
light rain or light rain snow mix. Precipitation amounts will be
light with only 1-3 inches of new snow possible in the mountains
with each shortwave. Afternoon temperatures during this time will be
in the 30s over the mountains and 40s in the lower elevations which
is near average for this time of the year. Wister
long term... Saturday night through Thursday morning... An active
weather pattern continues as a series of waves around the low in the
gulf of alaska continue to move through the region. At the outset of
the period weak ridging in the trough-ridge-trough pattern will be
over the region. This will quickly move off to the east ahead of the
first impulse associated with the aforementioned gulf of alaska low
entering the area during the day on Sunday. Precipitation will taper
off during the day on Monday as transient ridging builds back in for
Monday night Tuesday with the next significant shot of energy
entering the region late Tuesday night Wednesday morning. Snow
levels during the periods of heaviest precipitation associated with
each warm front will be 3000-4000 feet, falling to around 2500 feet
with passage of the cold front with each system. Both systems should
result in some helpful additions to the mountain snowpack, but will
also include impacts to those transiting the passes. Temperatures
will be near to slightly above period through the extended. Breezy
conditions will be possible late Sunday night Monday morning as
trough crosses local maximum of 850mb winds along the columbia
river, but given timing with convective mixing at a minimum may be
more of a localized threat for downslope favored areas and
ridgetops. 74

Preliminary point temps pops
Pdt 46 49 35 46 40 90 30 10
alw 48 50 36 47 40 90 30 10
psc 39 51 35 47 90 60 10 10
ykm 38 49 31 44 90 20 10 10
hri 43 51 35 48 80 80 10 10
eln 34 45 28 40 100 20 10 20
rdm 45 46 27 42 80 60 30 20
lgd 44 46 32 42 20 90 60 40
gcd 44 46 29 40 10 90 60 30
dls 41 51 35 47 100 40 30 30

Pdt watches warnings advisories
Or... Wind advisory until 4 am pst Thursday for orz507.

Wind advisory until 8 am pst Thursday for orz049.

Wa... Wind advisory until 4 am pst Thursday for waz029.

91 91 91


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
TCNW1 - 9446484 - Tacoma, WA 71 mi48 min 51°F 49°F1007.9 hPa (-1.3)
TCMW1 - 9446482 - Tacoma Met, WA 71 mi48 min SSE 4.1 G 6
EBSW1 - 9447130 - Seattle, WA 71 mi48 min SSE 5.1 G 8.9 52°F 49°F1007.6 hPa (-1.3)

Wind History for Seattle, Puget Sound, WA, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure

Wind History from SMP (wind in knots)
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Last 24hr----------------------------------------------6
1 day ago--NE755566N75543CalmNE3CalmCalmCalmCalmCalmCalmCalmCalm4Calm
2 days ago66NE8
G18
NE7----65666465--NE75----------NE7NE8
G14

Tide / Current Tables for Des Moines, Washington
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Des Moines
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Thu -- 06:46 AM PST     12.61 feet High Tide
Thu -- 07:49 AM PST     Sunrise
Thu -- 08:45 AM PST     Moonrise
Thu -- 12:15 PM PST     6.73 feet Low Tide
Thu -- 04:50 PM PST     Sunset
Thu -- 04:57 PM PST     10.42 feet High Tide
Thu -- 06:41 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.70.83.268.911.112.312.61210.68.97.46.877.991010.49.98.66.64.21.90

Tide / Current Tables for Duwamish Waterway, Washington
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Duwamish Waterway
Click for Map
Thu -- 06:42 AM PST     11.88 feet High Tide
Thu -- 07:50 AM PST     Sunrise
Thu -- 08:45 AM PST     Moonrise
Thu -- 12:18 PM PST     6.33 feet Low Tide
Thu -- 04:49 PM PST     Sunset
Thu -- 04:53 PM PST     9.82 feet High Tide
Thu -- 06:41 PM PST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.60.72.95.78.410.511.611.811.29.98.476.46.57.48.59.59.89.386.241.80.1

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

GOES Local Image of PacificNorthwest    EDIT
Geos

Wind Forecast for Pendleton, OR (0,6,7,8)
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Ground Weather Radar Station Seattle/Tacoma, WA
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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.