Wednesday, October18, 2017 L-36.com


Marine Weather and Tides
Clark Fork, ID

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 7:10AMSunset 5:53PM Wednesday October 18, 2017 9:55 AM PDT (16:55 UTC) Moonrise 5:43AMMoonset 5:48PM Illumination 3% Phase: Waning Crescent; Moon at 28 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 Clark Fork, ID
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location: 48.28, -116     debug


Area Discussion for - Spokane, WA
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Fxus66 kotx 181154
afdotx
area forecast discussion
national weather service spokane wa
454 am pdt Wed oct 18 2017

Synopsis
A moist warm front will move into the region today and bring an
moderate precipitation to the region today and Thursday. A cold
front will follow on Friday for showers, gusty winds and cooler
temperatures that will last through the weekend and into Monday.

A return to warmer temperatures and drier conditions is expected
next week.

Discussion
Today through Friday... The cold front that brought the winds and
showers to the region on Tuesday is now well south and east of
the region, but we are far from done with the active weather. Weak
and short lived high pressure will build into the region this
morning ahead of the next vigorous up stream system. A warm front
will move into the region his morning and stall over the region
through at least Thursday. This will have two effects on the
weather for the next few days. First: the resultant west-
southwest flow will tap into deep pacific moisture associated with
a significant atmospheric river moving across the pacific.

Moisture will increase to well over 200 percent of normal and this
looks like it will remain over the region until a cold front
passage on Friday. Second: the warm front will combine with
several weak waves to provide ample lifting across the region.

This will result in an extended period of precipitation across the
inland northwest. The cold front will move across the region
Thursday night and be east into montana by late Friday mid-day for
drying west to east through the day. Precipitation will turn
showery with the focus over the cascades and across the eastern
mountains. Showers will likely build back to the west Friday
afternoon with measurable precipitation as far west as the upper
basin.

* precipitation: it looks like all areas will see measurable
precipitation. The westerly flow will cause a rain shadow
downstream of the cascades Wednesday and Thursday, however this
system is so wet it will not take much to squeeze up to a tenth
of an inch of precipitation for the deep basin. Outside of the
basin the lower elevations will see a half inch or a little more
and the mountains will see from a half inch to well over an
inch of moisture. Areas down stream of the cascade crest and
across the northeast mountains and the northern panhandle
mountains could see 1-3 inches of precipitation. Snow levels
will be rather high and will only increase with the strong warm
advection. For today snow levels across the north will be
4500-5000 feet but will increase to well over 7000 feet by this
afternoon. So precipitation will be as rain with snow only at
the highest elevations, and even there it will turn to rain by
late afternoon. Snow levels will drop quickly behind the front
down to 4500 feet again. But by this time the precipitation is
beginning to subside. Still the higher elevation will likely
pick up a good shot of snow.

* temperatures and winds: temperatures will be in the 40s to mid
50s and on the cool side of normal. Winds have decreased
substantially from Tuesday afternoon but will remain
breezy gusty at times today and Thursday. The winds will be on
the increase Thursday night and Friday with the cold front
passage with gusts 25-35 mph likely Friday. Tobin
Friday night through Sunday: a very wet zonal flow will be over
the area over the weekend as an atmospheric river of subtropical
moisture becomes aimed at the area. The leading edge of the
precipitation will arrive in the form of a warm front on Saturday.

Sufficient isentropic ascent should bring rain and mountain snow
to all areas on Saturday. The strongest lift with the passing warm
front occurs Saturday afternoon and evening. Once the front
passes... Precipitation will likely become more confined to the
cascade crest and idaho panhandle as strong downslope flow kicks
in east of the cascades with 850mb winds out of the west-
southwest at around 50 kts. Snow levels increase to 6000-7000 feet
Saturday night behind the warm front. Overall impacts from snow in
the mountains should not be significant as warm air will be quick
to enter the region. Model QPF values Saturday and Saturday night
near 1-2 inches in the idaho panhandle mountains and 3-5 inches
along the cascade crest. The abundance of precipitation along with
snow melt Saturday night into Sunday will lead to rises on area
streams and rivers but no flooding is expected.

Pressure gradients become tight Saturday night over SE washington
into the camas prairie area... Which may lead to windy conditions
with local gusts of 40-50 mph. On Sunday models show some
differences with how quickly the atmospheric river sags south of
the area but the latest consensus keeps the highest rain chances
over SE washington into the central panhandle mountains as the
atmospheric river begins to shift south. 850mb winds of 35-50 kts
remain over the region on Sunday so locally windy conditions are
possible.

Monday and Tuesday: an upper ridge builds for a warming and drying
trend. Will likely have to contend with overnight morning fog for
the northern valleys and idaho panhandle given the abundance of
low level moisture that will be around after the weekend soaking.

Jw

Aviation
12z tafs: the next pacific storm system is beginning to move on
to the washington coast early this morning. Wet and unsettled
weather can be expected over the next several days as this system
will come through in stages. Clouds will thicken and lower over
the region this morning as a warm front moves east of the
cascades. Precipitation will begin at keat just after 1200... But
will likely get rain shadowed by the cascades... But very light
precipitation is still expected. Further to the east kge-kcoe
corridor could see as much as 0.05-0.10. Precipitation should be
mostly done for the eastern TAF sites between 04-06z tonight. The
deck will lower to around bkn-ovc050 with the onset of the
precipitation and stratus is not expected to form this evening
allowing conditions to remainVFR through 12z. Tobin

Preliminary point temps pops
Spokane 54 48 53 42 51 36 90 80 90 90 50 20
coeur d'alene 55 46 55 41 49 36 90 80 80 90 50 30
pullman 59 48 58 43 50 37 30 30 50 90 50 40
lewiston 67 49 66 47 58 40 20 10 10 90 30 20
colville 53 45 54 41 52 34 70 60 80 80 40 40
sandpoint 51 44 52 38 48 33 100 100 100 100 70 40
kellogg 53 43 56 40 45 35 70 60 40 100 80 70
moses lake 60 48 59 39 58 35 50 30 60 30 10 10
wenatchee 56 45 58 41 55 37 20 10 50 40 10 20
omak 54 42 58 36 56 32 40 40 80 40 30 10

Otx watches warnings advisories
Id... None.

Wa... None.



Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Sandpoint, Sandpoint Airport, ID30 mi80 minNNE 310.00 miFair37°F28°F70%1016.3 hPa

Wind History from SZT (wind in knots)
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Last 24hrS6SW6S12
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SW4W6SW3CalmW4N3CalmCalmW3CalmCalmCalmCalmCalmCalm
1 day agoCalmS7SE6S5SW6E7S8S3SW4CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm
2 days agoCalmCalmE7SE4E7E5SE5NE3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalm

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map and Satellite Images
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Weather Map
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IR Satellite Image from GEOS
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GOES Local Image of PacificNorthwest    EDIT
Geos

Wind Forecast for Spokane, WA (12,3,4,5)
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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.