Saturday, March25, 2017 L-36.com


Marine Weather and Tides
Sandpoint, ID

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:35AMSunset 7:09PM Saturday March 25, 2017 8:44 AM PDT (15:44 UTC) Moonrise 5:38AMMoonset 4:26PM Illumination 4% 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 Sandpoint, ID
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location: 48.28, -116.54     debug


Area Discussion for - Spokane, WA
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Fxus66 kotx 251154
afdotx
area forecast discussion
national weather service spokane wa
454 am pdt Sat mar 25 2017

Synopsis
Mainly mountain showers and breezy winds can be expected for
today. Sunday will start out dry, but the chances for
precipitation will increase from the west late Sunday afternoon
and Sunday night. Afternoon showers will be possible through next
week, with several more rounds of rain and mountain snow
expected.

Discussion
Today and tonight... Satellite imagery gives a good idea on what to
expect today. An upper level trough will move across the region
and eject east into montana by late this afternoon. A
conditionally unstable atmosphere will be over the region. 500mb
temps will be -28c and lapse rates 6-7 c/km. Not much in the way
of a kicker except afternoon heating. Another thing the satellite
loop shows is a mass of quite dry air moving with the trough.

Showers will be likely in our normally favored orographic areas,
it will be much tougher to get showers initiated out side of the
cascades, the blue mountains and the panhandle mountains.

Precipitation will be as valley rain and graupel and mountain
snow. Temperatures will be on the cool side of seasonal norms.

Southwest winds will be on the increase slightly through the
afternoon with gusts 20 to 25 mph.

High pressure will move into the region late this afternoon and
move slowly across the forecast area tonight and early Sunday.

This will bring a break in the active weather. Lighter winds and
mostly clear skies will result in localized stratus/fog
development, likely near water sources.

Sunday afternoon and Sunday night... The next weather system will
quickly move into the region Sunday afternoon. A warm front will
drag increasing pacific moisture back into the region by late
Sunday afternoon and track across the forecast area Sunday night.

Moisture again increases to around 200 percent of normal and will
result in another period of widespread light to moderate
precipitation. The accompanying cold front is expected to follow
after 06z Sunday night or so and will result in drying from the
west Monday morning.

Precipitation amounts and impacts: precipitation amounts from
around a tenth of an inch in the basin to between a quarter and a
half inch for the higher terrain of the panhandle mountains will
be possible. Snow accumulations of 3-6 inches will be possible for
the mountains, with locally higher amounts near the cascade crest.

High water levels on small rivers and streams will continue.

Localized field flooding will also remain problematic. Tobin
Monday and Tuesday: the trough axis pushes through the region
Monday. Chance of precip will decrease in the morning, but as
things become unstable in the afternoon, the chance of showers and
isolated thunderstorms will increase. 500mb temps range from -28
to -31c in the aftn. The 00z GFS is showing less instability than
earlier runs, but the 00z NAM is similar to its previous run and
is showing good instability in the afternoon and early evening
hours. Currently have thunder across spokane and whitman counties
and eastward. If the NAM continues its trend, may have to extend
that further west into the columbia basin during the afternoon
hours. The chance of showers will decrease through the overnight
hours. A shortwave flat ridge moves in on Tuesday. Precipitable
water values remain high... About a half inch or more. There should
be enough orographic flow for showers to develop once again, with
the best chance in the mountains.

Wednesday through Saturday: the general pattern between the
models is in pretty good agreement. A warm front will move in
Wednesday followed by an upper level trough and cold front wed
night or Thursday. Then a ridge builds in by Friday and flattens
Saturday as the next weather system approaches the area from the
northwest. The specifics between the models are different such as
timing and strength. Kept chance of showers in the forecast
through Thursday then start to dry things out thur night through
Friday night as the ridge builds in.

Daytime temps will be around or slightly below average while
overnight lows will be around or slightly above average. Or for
the valleys... High temps in the upper 40s and 50s with lows in the
30s. /nisbet

Aviation
12z tafs:an unstable air mass will support isolated showers at
times for the eastern TAF sites with scattered showers near the
cascades and panhandle mountains through sunset. Cigs/vsby will
remainVFR through the forecast period... However with heavier
showers conditions may drop to MVFR/vfr briefly. Southwest winds
will be on the increase through the morning with gusts 15-20kts
through sunset. High pressure building into the region tonight
will result in lighter winds and clearing skies. Stratus/fog
development will be possible for the northern valleys and along
water sources and this may affect ksff/kgeg 06-12z. Tobin

Preliminary point temps/pops
Spokane 49 33 48 38 51 37 / 10 10 30 70 70 30
coeur d'alene 47 31 48 36 48 35 / 20 10 20 80 70 40
pullman 47 34 49 38 49 36 / 20 10 40 70 80 30
lewiston 56 36 53 41 55 38 / 40 0 20 80 70 20
colville 48 29 47 36 49 35 / 10 10 20 70 60 10
sandpoint 46 29 47 33 46 33 / 50 20 10 70 70 40
kellogg 43 31 45 34 44 34 / 50 20 20 90 70 50
moses lake 56 32 52 38 58 40 / 0 0 50 70 20 10
wenatchee 51 31 47 35 53 37 / 0 0 70 80 20 10
omak 50 30 47 35 53 37 / 10 0 70 80 20 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, ID2 mi69 minSSW 310.00 miOvercast39°F37°F93%1016.6 hPa

Wind History from SZT (wind in knots)
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Last 24hrNE9NE8NE4NE6CalmCalmCalmS3SW3S3SW3S4S4S5S4S4CalmS4S4S5S4S3S3SW4
1 day agoS8S7S6SW6S8SW6S4SW5W4CalmCalmCalmCalmNE6CalmCalmCalmNE9NE8NE8NE5W4NE6NE9
2 days agoCalmCalmCalmSE6SE6SW7S6SW11
G15
S3CalmCalmCalmCalmCalmS3SW9
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S6S6SW4S3S7S10S6Calm

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
wmap_P
IR Satellite Image from GEOS
west_satellite

GOES Local Image of PacificNorthwest    EDIT
Geos

Wind Forecast for Spokane, WA (11,2,3,4)
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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.