Tuesday, December7, 2021
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Marine Weather and Tides
Polson, MT

Version 3.4
NOTICE
3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone.
1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 8:11AMSunset 4:45PM Monday December 6, 2021 10:26 PM MST (05:26 UTC) Moonrise 11:09AMMoonset 7:13PM Illumination 9% Phase: Waxing Crescent; Moon at 3 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 062138 AFDMSO

Area Forecast Discussion National Weather Service Missoula MT 238 PM MST Mon Dec 6 2021

DISCUSSION. The current snow producing weather system is causing travel impacts throughout north-central Idaho, west- central Montana, and northwest Montana. Warm subsurface conditions may be leading to melting and refreezing of snow on roadways thus causing icy conditions. Slow travel is expected to continue through into the evening in northwest Montana and into Tuesday morning in north-central Idaho and west-central Montana due to continued snow.

The approaching shortwave trough, that is helping enhance the snow, is currently moving through northwest Montana and has a well defined back edge of clearing skies. Once the shortwave moves to the southeast, by this evening, snow will mostly end in northwest Montana. Moisture profiles show that the drying effects from the shortwave will not reach most of north-central Idaho and west- central Montana, so snow is expected to remain for most of the night and into Tuesday morning. The I-90 corridor from Lookout Pass through Missoula and east to Bearmouth/Drummond, and Highway 12 from Lowell, ID through Ovando, MT are most favored for continued snow, so snow amounts have been increased. Moisture then becomes limited during Tuesday morning so snow will become showery with generally light accumulations.

Moisture is forecast to move into the region from the southwest during Tuesday afternoon with the next weather system. This next weather system is expected to be warmer, which will cause warmer temperatures for some, but places like Missoula and most of the valleys of northwest Montana are more likely to have inversions and cool temperatures. Temperatures and moisture profiles show that ice in the clouds will be limited late in the day Tuesday through Tuesday night, so places that remain below freezing will have a wintry mix of precipitation or freezing rain into Wednesday morning.

Light snow chances remain through the end of the week, but a more robust snow producing weather system is showing up for this weekend that may target portions of central Idaho and northwest Montana.

AVIATION.

The focus of the ongoing snowfall will gradually shift southward into the evening as the moisture profile dries across Northwest Montana. High resolution models point toward an intensification of snowfall over Missoula through early evening. After 07/0200Z, snow intensity will decrease, though light snow will likely continue through much of the night on the terrain of central Idaho, and much of west- central Montana, including KMSO. Periodic snow showers will continue on the terrain Tuesday but be very limited in the valleys. The next shortwave is set to arrive Tuesday night into Wednesday with more widespread mixed precipitation once again.

MSO WATCHES/WARNINGS/ADVISORIES. MT . Winter Weather Advisory until 9 AM MST Tuesday Missoula/Bitterroot Valleys.

Winter Weather Advisory until 9 AM MST Tuesday Lower Clark Fork Region.

Winter Weather Advisory until 8 PM MST this evening Flathead/Mission Valleys.

Winter Weather Advisory until 8 PM MST this evening West Glacier Region.

Winter Weather Advisory until 8 PM MST this evening Kootenai/Cabinet Region.

Winter Weather Advisory until 9 AM MST Tuesday Bitterroot/Sapphire Mountains.

Winter Weather Advisory until 9 AM MST Tuesday Potomac/Seeley Lake Region.

ID . Winter Weather Advisory until 8 AM PST Tuesday Northern Clearwater Mountains.

Winter Weather Advisory until 8 AM PST Tuesday Southern Clearwater Mountains.




Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Kalispell, Glacier Park International Airport, MT42 mi32 minN 010.00 miOvercast15°F11°F84%1019.5 hPa

Link to 5 minute data for KGPI

Wind History from GPI (wind in knots)
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This day00000000NW30000SE3000SE30000NE40
1 day ago0NW400000SW300SW5S3S3NE3E4W6W6W5000000
2 days agoS30N300SW50000000SW3SW4W5W3NE3S3SW7SW80SE50

Tide / Current Tables for
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Tide / Current Tables for
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Weather Map
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GEOS Local Image of PacificNorthwest    EDIT
NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
Link to Loop

Other links: GEOS-West     Contential US     Full GOES-East
Ground Weather Radar Station




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