Marine Weather and Tides
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 7:26AM||Sunset 6:14PM||Monday February 24, 2020 1:03 AM MST (08:03 UTC)||Moonrise 8:22AM||Moonset 7:21PM||Illumination 0%|
7 Day Forecast for Marine Location Near Finley Point, MTHourly EDIT Help
Area Discussion for - Missoula, MT  (on/off)  Help NOTE: mouseover dotted underlined text for definition
FXUS65 KMSO 232111 AFDMSO
Area Forecast Discussion National Weather Service Missoula MT 211 PM MST Sun Feb 23 2020
. STRONG COLD FRONT ACCOMPANIED BY WIND GUSTS TO 40 MPH AND BRIEF HEAVY SNOW ACROSS NORTHERN ROCKIES THROUGH THIS EVENING .
. SIGNIFICANT SNOW BANDS POSSIBLE ACROSS WESTERN MONTANA LATER THIS EVENING .
A powerful Pacific cold front will move across the Northern Rockies this afternoon and evening, producing intense snowfall and wind gusts up to 40 mph. Strong cross winds, low visibility in snow, and suddenly slippery roadways from accumulating snow will be a travel impact for most low elevations near the time of frontal passage. Snow showers behind the cold front are anticipated to organize from northwest to southeast in possibly intense banded snow features. The threat from sudden 1+inch/hour snowfall is very real for the I-90 corridor from west (Lookout Pass) to east (Deer Lodge and vicinity). The most plausible area for sudden changeability in I-90 road conditions from banded snow will be East Missoula to Drummond. Travelers should be prepared for fast changing conditions this evening through tonight.
Snow showers will continue across the Northern Rockies tonight through Monday morning, impacting most mountain pass roadways with snow accumulation. Valley locations close to the Continental Divide, including Seeley-Swan Valley and Highway 2 east of Columbia Falls to Essex may see a storm total accumulation up to 6 inches. Snow covered roads will continue to be a hazard for area travelers through midday Monday.
Cold air will settle across the Northern Rockies Monday through Tuesday, however the magnitude of cooling will be less than that experienced this past week (when subzero temperatures appeared for area valleys). One reason for relatively less cooling: widespread low elevation snow cover has been diminished the past several days and will be confined to higher elevation valleys and low elevations near the Continental Divide. Also, cloud cover appears to not diminish completely Monday night, preventing optimal radiational cooling.
The previously depicted 3-day warm ridge of high pressure over the Northern Rockies during middle to late this coming week has been supplanted by several days of relatively cool northwest flow Expect mountain-based snow showers with low accumulation potential during this time (e.g., minor travel impacts over mountain passes). The single day for the warm ridge to move overhead is Friday, when low elevation temperatures will likely warm into the 50s.
Model guidances continue to depict the next storm cycle starting over the Northern Rockies beginning next weekend and continuing through at least early next week. The northwest oriented storm systems that are lined up to pass over the region during this time appear to favor high elevations for snow accumulation, however overnight/morning accumulations of a few inches for area valleys during both the Friday night/Saturday morning and Monday night/Tuesday morning time frames appears plausible. Temperatures will be cool during this time, however not unseasonable.
AVIATION. A strong cold front just west of our forecast area will affect the Northern Rockies air space beginning after 23/2100z. Expect strong winds out of the southwest prior to frontal passage. Brief but very intense snow showers during the frontal passage, approximately 2230-2330z KGPI, 2300-0130z KMSO, and 24/0100-0230z for both KBTM and KSMN. After frontal passage winds will shift to the west northwest with gusts to 25 MPH. In addition, it is expected that moderate snow showers or snow bands could develop in southwest Montana or vicinity of KBTM and east of KMSO 24/0100z-24/0700z. Monday will see any remaining snow showers or bands confined to the high terrain of western Montana.
MSO WATCHES/WARNINGS/ADVISORIES. MT . Winter Weather Advisory until 11 AM MST Monday Lower Clark Fork Region.
Winter Weather Advisory until 11 AM MST Monday West Glacier Region.
Winter Weather Advisory from 5 PM this afternoon to 11 AM MST Monday Bitterroot/Sapphire Mountains.
Winter Weather Advisory from 5 PM this afternoon to 11 AM MST Monday Potomac/Seeley Lake Region.
ID . Winter Weather Advisory until 10 AM PST Monday Northern Clearwater Mountains . Southern Clearwater Mountains.
Winter Weather Advisory from 5 PM this afternoon to 11 AM MST Monday Eastern Lemhi County . Western Lemhi County.
Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports. Follow links for more data.
|Kalispell, Glacier Park International Airport, MT||41 mi||68 min||S 8||10.00 mi||Overcast||35°F||25°F||67%||1015.4 hPa|
Link to 5 minute data for KGPI
Wind History from GPI (wind in knots)
|1 day ago||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||S||S||SE||SW||SW||SW||SW||S||SW||SE||NE||Calm||S||N|
|2 days ago||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||S||S||S||S||SW||SW||Calm||Calm||Calm||Calm||Calm||Calm|
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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 (3,6,7,8)(on/off)  Help
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