South Hills, MT Marine Weather and Tide Forecast
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Marine Weather and Tide Forecast for South Hills, MT

April 16, 2024 2:02 PM MDT (20:02 UTC) Change Location
Sunrise 6:35 AM   Sunset 8:19 PM
Moonrise 11:50 AM   Moonset 3:10 AM 
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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.

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7 Day Forecast for Marine Location Near South Hills, MT
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Area Discussion for - Great Falls, MT
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FXUS65 KTFX 161739 AFDTFX

Area Forecast Discussion National Weather Service Great Falls MT 1139 AM MDT Tue Apr 16 2024

Aviation Section Updated

SYNOPSIS
Gusty westerly winds with near normal temperatures will mostly dominate across North Central, Central, and Southwest Montana for most of today, but a Canadian cold front will move through the area tonight, bringing cooler and more unsettled conditions.
Widespread precipitation should change over to snow at most elevations after midnight, resulting in at least minor accumulations. However, mountain areas will receive more significant snowfall through the day on Wednesday. Cold temperatures will linger through Thursday and Friday as snow chances will decrease. A drying and warming trend is then expected for the weekend into early next week.

DISCUSSION
Today through Wednesday... A low pressure trough oriented east to west over Alberta and British Columbia early this morning will continue to slowly drift south toward Montana today. The strong westerly flow aloft ahead of the trough will bring an increased chance of rain and snow showers, possibly with a few thunderstorms, to the Rocky Mountain Front and east along the Hi- Line, as well as to Southwest Montana. These westerly winds will also translate down to the surface over much of North Central, Central, and Southwest Montana, but especially so over the plains. The area will also remain ahead of an associated Canadian cold front, which will allow temperatures to stay near seasonal averages. As the trough and cold front move south into the area overnight, these gusty winds will shift to a more northerly upslope direction, resulting in more widespread rain and snow to change to all snow at all elevations after midnight, which should mostly continue into Wednesday.
Forecast snowfall amounts have been fairly consistent over the last few model runs, focusing on the mountains of the Rocky Mountain Front and the mountains of Central Montana (mostly 3 to 8 inches for the event - Winter Weather Advisory), as well as the Gallatin/Madison Mountains of Southwest Montana (mostly 6 to 14 inches - Winter Storm Warning).
Will therefore continue the Warning and Advisories as is for tonight through Wednesday.

The winds over the plains will be somewhat concerning, as isolated areas are forecast to have a 30 to 50 percent probability of sustained winds exceeding 39 mph and gusts exceeding 55 mph (high wind criteria is sustained 40+ mph and/or gusts of 58+ mph). The favored areas for these westerly winds ahead of the front will be the Rocky Mountain Front to the Cut Bank area and in Blaine County, while similar conditions for northerly winds after frontal passage will spread south into Judith Basin and Fergus Counties.
These probabilities are a bit higher than previous model runs, so this situation will need to be monitored for possible high wind highlights.

Thursday through Friday... The main low pressure center associated with the trough will move east along the Canadian border away from the forecast area through this period, but the trough itself will remain over Montana. This will greatly diminish the threat for additional measurable snowfall, but lingering breezy northerly winds will help keep temperatures mostly between 10 and 15 degrees below normal.

Saturday through next Tuesday... A broad high pressure ridge is forecast to move into the western United States during this period, as a low pressure trough digs south out of the Gulf of Alaska just off the Pacific coast. This set-up should help warm temperatures from just below seasonal averages on Saturday to around 10 degrees above normal by Tuesday. This period should also remain fairly dry, but weak disturbances ejecting from the Pacific trough may bring periods of mainly mountain precipitation and gusty westerly downslope winds.

AVIATION
1139 AM MDT Tue Apr 16 2024 (16/18Z TAF Period)

The main concerns this TAF period will include snow developing this evening and tonight, as well as a wind shift behind a southward advancing cold front. Precipitation, mainly in the form of snow, will develop ahead of the front in Southwest Montana this evening, and along and behind the front tonight across Central and North- central Montana. A shift to more northerly winds will progress from north to south across the region later this afternoon through tomorrow morning. Gusty northwesterly winds will persist behind the front, especially across the plains. Expect mountain obscuration this evening through the rest of the TAF period. -AM

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

PRELIMINARY POINT TEMPS/POPS
GTF 53 29 38 24 / 10 80 70 20 CTB 47 26 35 21 / 50 70 30 10 HLN 56 31 39 24 / 20 60 80 20 BZN 57 26 38 19 / 50 80 70 20 WYS 48 23 35 11 / 40 90 80 30 DLN 56 27 38 20 / 20 60 60 20 HVR 55 29 40 23 / 10 40 30 20 LWT 53 26 34 20 / 10 50 60 20

TFX WATCHES/WARNINGS/ADVISORIES
Winter Weather Advisory from noon today to 6 AM MDT Wednesday for East Glacier Park Region-Northern High Plains.

Winter Weather Advisory from 9 PM this evening to noon MDT Wednesday for Big Belt, Bridger and Castle Mountains-Gates of the Mountains-Little Belt and Highwood Mountains-Southern High Plains-Southern Rocky Mountain Front-Upper Blackfoot and MacDonald Pass.

Winter Storm Warning from 6 PM this evening to 6 PM MDT Wednesday for Gallatin and Madison County Mountains and Centennial Mountains.




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Airport Reports
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AirportDistAgeWind ktVisSkyWeatherTempDewPtRHinHg
KHLN HELENA RGNL,MT 3 sm69 minWNW 15G2410 smA Few Clouds55°F25°F30%29.91
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