Marine Weather and Tides
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 6:28AM||Sunset 8:17PM||Monday April 19, 2021 4:54 PM MDT (22:54 UTC)||Moonrise 10:26AM||Moonset 1:51AM||Illumination 55%|
7 Day Forecast for Marine Location Near Big Sky, MTHourly EDIT Help
Area Discussion for - Great Falls, MT  (on/off)  Help NOTE: mouseover dotted underlined text for definition
FXUS65 KTFX 192110 AFDTFX
Area Forecast Discussion National Weather Service Great Falls MT 310 PM MDT Mon Apr 19 2021
SYNOPSIS. Although few snow showers continue to linger across the plains this afternoon, the chance for accumulating snowfall today has mostly ended. As skies clear out tomorrow and Wednesday, expect temperatures to gradually warm through midweek. Another cold front will move through the area on Thursday, bringing another round of rain and snow to the area.
In the wake of yesterday's cold front, northerly flow continues to advect some colder air into the area, though this hasn't been evident in surface temperatures thanks to ample heating from the mid-April sun has allowed temperatures to climb into the mid to upper 30s for most of the area. This clash of surface heating and cold air advection has led to the development of convective snow showers. While these won't accumulate much, a few brief periods of reduced visibility are possible. Any snow shower activity should die down quickly after sunset.
Surface high pressure will build into the area for Tuesday and Wednesday, which will allow temperatures to warm up each day (mid 40s on Tuesday and mid to upper 50s on Wednesday, at least at lower elevations). In addition to warming temperatures and mostly clear skies, winds should be on the light side, so the next few days will be hard to find substantial complaints with weather- wise.
Most of those who are looking for more moisture (and it is needed) will have to look no further than Thursday, as another upper level trough and associated cold front will swing through the area, bringing some rain that will change to snow. This system is by and large looking similar to the one that moved through Sunday and early this morning, though it may have a little less cold air and will arrive a little earlier in the day. This combination should cause precipitation to fall mostly as rain, though there will certainly be some snow on the back side of this system. With that in mind, snowfall accumulations have been limited to under an inch for most of the area, save for some of the higher terrain along the Rocky Mountain Front and the north side of the Little Belts and the Big Snowy Mountains.
Beyond Thursday and Friday morning, confidence in any real details of the forecast diminish quite quickly. Large scale, an upper level trough will begin to move into the Pacific Northwest around Saturday, but will likely stall out as it does so. This will likely result in a cool, somewhat damp weekend. However, the exact timing and amount of precipitation will be very dependent on how this upper level trough evolves over the next few days. Ludwig
AVIATION. 1120 AM MDT Sun Apr 18 2021 (19/18Z TAF period)
Widespread SCT/BKN low clouds persist across N-central and SW Montana as this morning's weather system moves away to the south and east. While most terminals are recovering to VFR/MVFR conditions, expect intermittent return to IFR as low clouds temporarily fill in from SCT to BKN. Isolated snow showers remain possible through the afternoon, particularly for KLWT.
Refer to weather.gov/zlc for more detailed regional aviation weather and hazard information.
PRELIMINARY POINT TEMPS/POPS. GTF 22 44 22 57 / 10 0 0 0 CTB 23 47 23 59 / 0 0 0 0 HLN 22 46 23 57 / 0 0 0 0 BZN 17 44 18 53 / 0 0 0 0 WYS 8 42 9 49 / 0 0 0 0 DLN 16 45 19 54 / 0 0 0 0 HVR 24 48 23 59 / 10 0 0 0 LWT 19 39 18 50 / 20 10 0 0
TFX WATCHES/WARNINGS/ADVISORIES. None.
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|Bozeman, Gallatin Field, MT||38 mi||58 min||NW 17||10.00 mi||Overcast||34°F||20°F||56%||1028.7 hPa|
Link to 5 minute data for KBZN
Wind History from BZN (wind in knots)
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