Thursday, October28, 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 8:15AMSunset 6:26PM Thursday October 28, 2021 2:55 PM MDT (20:55 UTC) Moonrise 11:19PMMoonset 2:39PM Illumination 45% Phase: Third Quarter Moon; Moon at 23 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 282012 AFDMSO

Area Forecast Discussion National Weather Service Missoula MT 212 PM MDT Thu Oct 28 2021

DISCUSSION. Light showers are continuing across the Northern Rockies. These are a prelude to yet another warm atmospheric river. Snow levels have been quickly rising today as warm air moves into the Northern Rockies, for instance our radar sits on Point 6 at 8000 feet, yesterday's high temperature was around 23F and while today it is currently 32F. The main focus of this system will be portions of Clearwater County, ID and northwest Montana. Mountains of northwest Montana are likely to receive 1 to 2 inches of water equivalent, with isolated locations potentially receiving up to 3 to 4 inches. Be prepared driving in these locations for localized mud or rock debris flows. Valleys of northwest Montana are forecast to receive 0.25 to 1.0 inches of rain, the further south and east you go will be much less accumulation.

Late afternoon Friday, a cold front will slide south out of Canada bringing cooler temperatures. By Saturday morning, snow levels will fall below 4000 and potentially below 3000 feet. The problem is most of the moisture will have been shunted to the southeast. That said, areas along the Continental Divide, north of Ovando, may see a little light snow Saturday morning. Marias Pass on US-2 has a 40% probability of up to 2 inches of wet snow.

An east wind will develop for most of our area on Saturday and last through Monday. If you are going to the Griz game on Saturday be prepared for a cool breeze emptying out of Hellgate Canyon.

After Saturday, the models diverge on possible scenarios. So currently our confidence is on temperatures returning to seasonable normals, upper 40s western Montana and 50s to 60s north-central Idaho. Also, there is some agreement with a trough developing over the east coast of the US and a few weak systems attempting to move into the northwest, what we would categorize as 'crashing waves'. So potentially a couple periods of shower activity for mountainous terrain.


AVIATION. Shower activity is continuing from I-90 and south to US-12, expect terrain obscurations from time to time. No major ceiling or visibility disruptions are expected at terminals through this evening. Precipitation will focus across far Northwest Montana this evening into Friday morning, then shift southeastward on Friday afternoon. Terminal sites will see occasional gusty winds of 15-25 kts mainly in the afternoon, diminishing some around sunset.



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 mi61 minS 610.00 miOvercast46°F39°F77%1020.5 hPa

Link to 5 minute data for KGPI

Wind History from GPI (wind in knots)
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Last 24hrW11
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6SW8S9S8SW9S6S7S6SE6NW300S30000SW4S7S10S8S6
1 day agoSW16
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S11S12S12S12S11S9S4S8SW10NE5N3W8W7W12
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2 days agoSE10SE9SE11SE11SE8SE6S7SW4S3N3S4E3W3000S4SW3S9S9S8S8SW11
G20
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G28

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.
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