Tuesday, April7, 2020
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Marine Weather and Tides
Missoula, MT

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 7:00AMSunset 8:15PM Tuesday April 7, 2020 8:24 PM MDT (02:24 UTC) Moonrise 6:56PMMoonset 6:18AM Illumination 100% Phase: Full Moon; Moon at 15 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 Missoula, MT
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location: 46.87, -114.01     debug


Area Discussion for - Missoula, MT
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FXUS65 KMSO 072102 AFDMSO

Area Forecast Discussion National Weather Service Missoula MT 302 PM MDT Tue Apr 7 2020

DISCUSSION.

A gorgeous, yet breezy spring day is evident across the Northern Rockies. Temperatures are well into the 50s and 60s. This will be the norm this week as warm, high pressure reigns. At night, temperatures will be able to cool into the 20s and 30s most areas, but teens in the higher elevation locations with snow cover. High temperatures may even crack 70 degrees for some locations by Thursday for the first time this year.

All eyes are on the big change that is expected to occur Friday night into Saturday as a cold Canadian air mass moves south over western Montana, making it feel like winter again.

These are the changes since the last forecast package:

1) A trend for the cold front to move across northwest Montana continues to be slightly faster each run. It could potentially make its way into the Flathead Valley by daybreak Saturday.

2) Models have been trending a little wetter Saturday morning across west-central Montana.

3) We have trended higher with easterly winds Saturday for western Montana and Lemhi County . with the potential for 50 mph wind gusts in a few places.

These are some of the impacts we feel may occur:

1) A return to snowy travel conditions with blowing snow a possibility all along the Continental Divide and including portions of Interstate 90.

2) Confidence is low, but damaging winds are a concern across northwest Montana, especially as soil temperatures are warming up in the valleys. This time of year, it doesn't take that much wind, maybe 40 mph, to bring down a lodgepole pine tree. Right now the wind gradient would suggest 40 to 50 mph are not out of the question.

3) A period of heavy snow is possible Saturday morning somewhere in northwest or west-central Montana near the cold front. There is uncertainty in exactly where this may setup, but it could become a problem for travel between Kalispell and Missoula on US-93 or even on Highway 200.

4) Southwest Montana could experience longer winter weather impacts during the day as the colder air filters in with constant snow shower activity. Gusty winds will add to the mix as well.

5) Saturday evening could be a little tricky in Lemhi County as the cold front makes its way down there. We're not expecting that much snow, but there could be enough to coat the roads and, combined with gusty winds, could be an issue.

6) Near-record low temperatures are possible Sunday and Monday. All of the main stations, Kalispell, Missoula, Butte, Salmon and a few places in central Idaho, could be within the top 10 coldest daily low temperatures. It's still early for people to be placing sensitive plants outside, but they should be aware of this threat.

AVIATION. Expect VFR conditions under high clouds and unlimited visibility through Wednesday as dry northwest flow persists. Gusty winds will be the only impact to aviation over the next 24 hours. Gusts to 25 knots out of the north and northwest will be present at all terminals this afternoon under a tight pressure gradient.


MSO WATCHES/WARNINGS/ADVISORIES. MT . None. ID . None.


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure

Link to 5 minute data for KMSO

Wind History from MSO (wind in knots)
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1 day agoW5W11NW13NW12NW5NW6NW6NW7N3CalmCalmW4W6NW3N3NW4Calm--SW5NW4E5SE4S5W12
2 days ago3CalmW4NW6NW7CalmNW4NW5NW4NW6W3CalmNW4NW4NE3S4CalmCalmCalmCalmW4W854

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: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Missoula, MT (22,6,7,8)
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Ground Weather Radar Station Missoula, MT
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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 numerous 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.