Friday, April20, 2018 L-36.com


Marine Weather and Tides
Moscow, ID

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 5:47AMSunset 7:45PM Friday April 20, 2018 11:36 AM PDT (18:36 UTC) Moonrise 9:27AMMoonset 12:05AM Illumination 29% Phase: Waxing Crescent; Moon at 5 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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7 Day Forecast for Marine Location Near Moscow, ID
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location: 46.73, -117     debug


Area Discussion for - Spokane, WA
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Fxus66 kotx 201814
afdotx
area forecast discussion
national weather service spokane wa
1114 am pdt Fri apr 20 2018

Synopsis
Dry, mild conditions are expected to continue through Friday. A
quick moving cold front will bring scattered showers Friday night
and windy conditions on Saturday. The new work week is expected
to start dry and mild and probably remain dry with a warming trend
through the week.

Discussion
Today through Saturday: our dry conditions continue tonight under
clear skies and calm winds. The nighttime microphsics satellite
band shows some high clouds just beginning to stream into the
region from the northwest in advance of our next quick hitting
system. The high pressure ridge which gave us pleasant weather on
Thursday will continue to do so today, though clouds will be on
the increase. High clouds will move in starting this morning with
mid level moisture, lowering clouds this evening ahead of the cold
front. The next system, currently off the coast, will be a quick
hitter, bringing a shot of mostly rain (high mountain snow)
showers late Friday and early Saturday. Showers look to start over
the cascades late Friday evening, spreading east, mostly over the
areas north of i-90. Snow levels in the cascades will start out
around 5,000 ft Friday night and lower to 3,000 ft by Saturday
afternoon. Early Saturday morning before 5 am will be the best
chance of rain for the spokane area as the surface cold front
crosses eastern washington into the idaho panhandle between 09 and
12z. Clearer skies move in behind the front and precip chances
drop off by late Saturday morning except for the cascades,
panhandle, and northeast washington mountains. For those area
scattered showers will taper off overnight. This system isn't
very wet compared to what we've recently experienced. Few
hundredths for the lower elevations and a few tenths for the
mountains, with a few inches of snow over 4,000 ft. There's a
slight chance for some thunder with a few of the showers over
extreme NE washington and the northern panhandle as instability
increases with afternoon, but they would be isolated. CAPE values
are marginal (in the 300-400 j kg).

The other issue Saturday will be gusty post frontal winds owing to
a deepening surface low that forms east of the rockies with the
upper level low passage. Behind the front winds shift from the
southeast to the southwest and a tightening gradient increases
winds to the 20-25 mph range. Given good mixing behind the front
and 850 winds in the 30-40 mph range, we'll likely see wind gusts
up to 35 mph for parts of the columbia basin. With the isolated
blowing dust issues we saw last week, these speeds could certainly
produce some patchy blowing dust that would temporarily limit
visibility for those traveling in the basin. Bw
Saturday night through Friday... The late weekend and the majority
of next week looks a lot like spring weather. Some showers will
linger behind the front Saturday night for the cascades and
possibly for the panhandle mountains, however, very dry air moves
into the region behind the front and any showers that do form will
be quite isolated and not overly wet. Breezy gusty winds are
expected to linger into Saturday evening and then decrease after
midnight.

Model guidance has been very consistent showing a weaker secondary
wave following quickly Sunday and kicking out of the area by
Monday with high pressure building in from the west. Little
moisture is available for this wave and the best forcing looks to
stay more over oregon so the forecast was kept dry. Temperatures
will begin a warming trend with the high temps on Monday
increasing into the 60s.

High pressure will strengthen over the western states for the
remainder of the week. All of the model guidance show a closed
low in the eastern pacific off the california coast Wednesday
night that moves inland Thursday and Friday. The challenge is what
happens as the low moves inland. There are differing solutions.

The european model has been more consistent showing the low taking
a southerly track into or cal and the probabilistic models so far
agree with this solution. Other models show the closed low
opening into an open wave and bringing a chance for precipitation
to the pac NW Friday and Saturday. Somewhere in between is
probably the right way to go. Consistency wins out for now and
with only moderate confidence we will keep the forecast dry with
temperatures warming well into the 60s and low 70s the remainder
of the week. Tobin

Aviation
18z tafs: a quick hitting cold front will swing through tonight.

Cloud cover will thicken this afternoon and evening with scattered
showers expected overnight along the front. Best chances for
showers will be across the northern mtns of eastern wa after 02z
and then progress into the id panhandle by 10z. Showers will be
light and brief at the TAF sites and will most likely skip over
keat and kmwh. Dry air in the boundary layer will keep CIGS above
5 kft agl. WithVFR conditions prevailing through 18z Saturday.

Winds will become gusty Saturday morning to between 25-35 kts
possible and will continue into the afternoon. Svh

Preliminary point temps pops
Spokane 61 45 54 34 57 35 0 30 10 0 0 0
coeur d'alene 61 43 54 33 56 34 0 30 30 0 0 0
pullman 60 45 53 34 55 35 0 10 10 0 0 0
lewiston 66 49 60 39 61 40 0 10 10 0 0 0
colville 63 44 57 34 59 35 0 40 20 0 0 0
sandpoint 59 42 51 32 54 33 0 40 60 0 0 0
kellogg 59 39 50 32 55 33 0 20 50 10 0 0
moses lake 65 46 61 36 62 38 0 20 0 0 0 0
wenatchee 64 45 57 37 60 39 0 20 10 0 0 0
omak 65 45 60 36 61 38 0 30 10 0 0 0

Otx watches warnings advisories
Id... None.

Wa... None.



Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Pullman / Moscow Regional Airport, WA7 mi43 minSSE 410.00 miFair54°F34°F47%1024.4 hPa
Lewiston, Lewiston-Nez Perce County Airport, ID24 mi1.7 hrsNE 610.00 miFair54°F39°F57%1023.8 hPa

Wind History from PUW (wind in knots)
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Last 24hrW11W12
G19
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NW8W7W3NW4NW5NW4CalmCalmCalmCalmCalmCalmCalmCalmCalmS3W3SE4
1 day agoE11SE7--E6E64E6NE4NE3NE5NE3NE3CalmCalmN3CalmCalmCalmCalmCalmCalmNW5W6W6
2 days agoW21
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SW17SW10
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SW10SW8S4SW6SW4CalmCalmE3NE4NE5E9E9E12E12E14E13

Tide / Current Tables for
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Weather Map and Satellite Images
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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.
Link to Loop

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Wind Forecast for Spokane, WA (14,3,4,5)
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Ground Weather Radar Station Spokane, WA
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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.