Tuesday, April25, 2017 L-36.com


Marine Weather and Tides
Polson, MT

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 6:24AMSunset 8:45PM Tuesday April 25, 2017 8:35 AM MDT (14:35 UTC) Moonrise 5:27AMMoonset 6:49PM Illumination 0% Phase: New Moon; Moon at 29 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 Polson, MT
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location: 47.7, -114.16     debug


Area Discussion for - Missoula, MT
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Fxus65 kmso 250958
afdmso
area forecast discussion
national weather service missoula mt
358 am mdt Tue apr 25 2017

Discussion Showers linger early this morning, with the main
focus in southwest montana, the glacier region, and north central
idaho. Most shower activity will decrease this morning; one
exception is in northwest montana where showers will increase due
to a passing shortwave trough. This feature will also bring
passing showers to much of the region during the afternoon.

Showers decrease in coverage late in the day and overnight.

The next weather system is still on track to bring widespread
precipitation on Wednesday. Showers increase throughout the day,
with Wednesday evening and overnight into Thursday morning
looking the wettest. Valley rainfall amounts on the order of 0.25
to 0.50 inches should be common over the 24 period starting mid-
day Wednesday and running through noon Thursday.

A secondary trough will push in from the northwest on Thursday
into Friday, bringing with it colder air. Winds will likely be
breezy with this system, gusting in the 20 to 30 mph range.

Temperatures will be about 10 degrees below average for this time
of year, and the air mass will still be moist, so mountain pass
roadways currently look like they will see accumulating snowfall
both Thursday and Friday morning. Travelers should prepare for
slower travel over the mountains both days. Locations as low as
3000 to 3500 feet, such as missoula, kalispell, and salmon, id
could even see some flurries and light snow on these mornings.

Saturday continues to look like the driest day in the next 7 days,
with light northwest flow over the area. Light showers are still
likely to develop by the afternoon, mainly in the high terrain.

Models show another series of wet and cool systems moving in
starting Sunday. Overall, the wet, active pattern looks to
continue for the foreseeable future.

Aviation Low cloud cover is dominating north central idaho and
western montana early this morning with northerly flow behind and
exiting low pressure center. A mix of rain and snow showers are
also intermixed in the cloud shield. Ceilings will gradually raise
during this morning, but widespread obscured terrain is likely
with abundant low level moisture and another trough poised to move
through the region from british columbia. The greatest
concentration of rain is forecast to be in northwest montana
during the afternoon but modest shower chances extend throughout
the region with the passage of the shortwave. Showers decrease in
coverage late today but cloud cover remains. Another weather
system will move into the region tonight bringing widespread
precipitation by Wednesday morning.

Mso watches/warnings/advisories
Mt... None.

Id... None.



Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kalispell, Glacier Park International Airport, MT42 mi41 minSSW 410.00 miOvercast41°F41°F100%1010.2 hPa

Wind History from GPI (wind in knots)
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Last 24hrS4SE6SE9SW8S76N94NW4N8N6SW7NW3NW3W4S4CalmSW6CalmCalmS3SE4S5SW4
1 day agoSE7S6S10S12S10S12NE5SE8SE11S10S8S10S5
G16
N5CalmW3CalmCalmNW3CalmW3CalmCalmCalm
2 days agoNE4NE135NE3--S7SE6SE13S11S10S4CalmNW3N3NW3N4N6CalmCalmCalmCalmCalmSW3Calm

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 Missoula, MT (10,2,3,4)
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Ground Weather Radar Station Missoula, MT
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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.