Thursday, October28, 2021
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Marine Weather and Tides
Big Sky, 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 7:57AMSunset 6:18PM Thursday October 28, 2021 3:29 PM MDT (21:29 UTC) Moonrise 11:17PMMoonset 2:17PM 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 Big Sky, MT
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location: 45.26, -111.31     debug


Area Discussion for - Great Falls, MT
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FXUS65 KTFX 282051 AFDTFX

Area Forecast Discussion National Weather Service Great Falls MT 251 PM MDT Thu Oct 28 2021

SYNOPSIS. Expect cloud cover and seasonably mild temperatures to pass over the region this evening ahead of a strong cold front tomorrow evening. Winds will increase again for the North-Central region tonight, with the strongest along the Rocky Mountain Front. With the Friday cold front, expect much colder temperatures for this weekend and the potential for the first lower elevation snowfall.

DISCUSSION.

Today through Saturday . Winds along the Rocky Mountain Front continue to strengthen into the overnight period, warranting a high wind warning out to 9 AM Friday. The potential for mountain waves remains high as well, but there is low confidence whether these waves will extend eastward into the Cut Bank region. General consensus is that the temperatures for Friday will be above normal for much of the area prior to the strong cold front late Friday, which has the potential to bring snowfall to the North-Central Plains. Heaviest of the snowfall will occur in the Glacier Park region, but general model agreeance showing less than an inch of snowfall for much of the Plains further south and east, and much of it will likely only accumulate in the grass. Primary concern is the melting of the snowfall and refreezing overnight that can bring icy conditions to the roadways early Saturday for any morning commuters. Temperatures this weekend are expected to be in the in the upper 30s in the North-Central region and mid to upper 40s in the Southwest region, which is still 10 to 15 degrees below normal.

Sunday through Thursday . There are no significant systems anticipated for the North-Central or Southwest regions during this time. Any potential for precipitation is slight at best, with the greatest to occur late Wednesday into early Thursday. Overall temperatures will remain on the colder side, still below normal, but there is a gradual warming trend beginning Tuesday and remaining throughout the end of the outlook period, bringing us closer to our seasonal averages by mid-week. - Pierce

AVIATION. 1130 AM MDT Thu Oct 28 2021 (28/18Z TAF period)

VFR conditions prevail over much of the region, although cloud cover will steadily increase over this TAF period. Expectations for VFR/MVFR conditions near KWYS due to low cloud ceilings late this evening. Primary concern is the increased westerly winds along the Rocky Mountain Front just west of KCTB. Confidence is high on the development of mountain waves in this area, but low confidence on whether these waves will move east enough to affect the KCTB terminal at this time. Overall, most of the region can expect increased cloud cover and brief periods of precipitation in the far North-Central region late. - Pierce

Refer to weather.gov/zlc for more detailed regional aviation weather and hazard information.

PRELIMINARY POINT TEMPS/POPS. GTF 52 67 28 39 / 0 20 40 10 CTB 46 57 25 37 / 30 60 70 0 HLN 43 67 33 43 / 0 20 40 10 BZN 36 64 34 46 / 0 0 50 20 WYS 32 48 34 45 / 10 10 30 30 DLN 35 60 35 48 / 0 0 20 10 HVR 46 67 27 43 / 10 30 40 0 LWT 46 65 27 38 / 10 10 40 10

TFX WATCHES/WARNINGS/ADVISORIES. High Wind Warning until 9 AM MDT Friday Eastern Glacier . Northern Rocky Mountain Front . Southern Rocky Mountain Front.



http://www.weather.gov/greatfalls


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Bozeman, Gallatin Field, MT38 mi33 minN 010.00 miOvercast57°F36°F45%1022.2 hPa

Link to 5 minute data for KBZN

Wind History from BZN (wind in knots)
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Last 24hrNW13
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NW9NW8N7NW5003SW5NW30S3SE3S40E30S3S6SE60000
1 day agoW18
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2 days agoN30SE30S3N400NW7W5SW3SW55NW16
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Tide / Current Tables for
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Weather Map
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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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