Updated: 3:37 PM MDT on September 3, 2015
Rain showers likely and a slight chance of thunderstorms in the evening...then numerous rain showers after midnight. Patchy fog after midnight. Chance of precipitation near 100 percent. Lows in the upper 30s to mid 40s. Northwest winds to 15 mph in the evening.
Rain showers likely in the morning...then rain showers likely and a chance of thunderstorms in the afternoon. Chance of precipitation near 100 percent. Highs in the 50s. East winds to 15 mph.
Rain showers likely and a chance of thunderstorms in the evening...then rain likely after midnight. Chance of precipitation near 100 percent. Lows in the 40s. Northeast winds to 15 mph.
Rain likely in the morning...then rain showers likely and a slight chance of thunderstorms in the afternoon. Chance of precipitation near 100 percent. Highs in the 50s.
Rain showers likely and a slight chance of thunderstorms in the evening...then rain likely after midnight. Chance of precipitation 80 percent. Lows in the mid 30s to lower 40s. Northwest winds to 15 mph.
Rain likely in the morning...then chance of rain showers in the afternoon. Chance of precipitation 70 percent. Highs in the 50s to lower 60s.
Partly cloudy. Slight chance of rain in the evening...then slight chance of rain showers after midnight. Chance of precipitation 20 percent. Lows in the 30s.
Partly cloudy with a 20 percent chance of rain showers. Highs in the mid 50s to lower 60s.
Partly cloudy with a 20 percent chance of rain showers. Lows in the 30s.
Partly cloudy with a 20 percent chance of rain showers. Highs in the 60s.
Partly cloudy. A 20 percent chance of rain showers in the evening. Lows in the mid 30s to lower 40s.
Partly cloudy. Highs in the 60s.
Mostly clear. Lows in the mid 30s to lower 40s.
Mostly sunny. Highs in the mid 60s to lower 70s.
Personal Weather Stations [Add your weather station!]
Location: BTL/LAO, Butte, MT
Updated: 5:22 PM MDT
|Temperature: 55.6 °F||Dew Point: 44 °F||Humidity: 66%||Wind: Calm||Pressure: 29.70 in||Hourly Precipitation: 0.00 in||Graphs|
Location: Kelley Mine Yard, Butte, MT
Updated: 5:20 PM MDT
|Temperature: 53.0 °F||Dew Point: 43 °F||Humidity: 68%||Wind: Calm||Pressure: 29.66 in||Hourly Precipitation: 0.00 in||Graphs|
Location: MesoWest, Butte, MT
Updated: 4:38 PM MDT
|Temperature: 51 °F||Dew Point: 41 °F||Humidity: 69%||Wind: North at 4 mph||Pressure: -||Hourly Precipitation: 0.00 in||Graphs|
Location: Warm Springs Ponds, Opportunity, MT
Updated: 5:21 PM MDT
|Temperature: 58.5 °F||Dew Point: 42 °F||Humidity: 54%||Wind: West at 13.0 mph||Pressure: 29.71 in||Hourly Precipitation: -||Graphs|
Location: Triangle Anaconda, Anaconda, MT
Updated: 5:20 PM MDT
|Temperature: 57.5 °F||Dew Point: 40 °F||Humidity: 51%||Wind: North at 6.0 mph||Pressure: 29.86 in||Hourly Precipitation: 0.00 in||Graphs|
Location: goosetown 2, Anaconda, MT
Updated: 5:10 PM MDT
|Temperature: 56.3 °F||Dew Point: 40 °F||Humidity: 54%||Wind: WNW at 6.0 mph||Pressure: 29.68 in||Hourly Precipitation: 0.00 in||Graphs|
MSN Maps of:
|Temp:||Dew Point:||Humidity||Wind||Pressure||Hr Precip||-|
Area Forecast Discussion National Weather Service Missoula MT 250 PM MDT THU SEP 3 2015 ...Cold & Wet Labor Day Weekend with High Mountain Snow Likely... .DISCUSSION...A strong and very cold upper level storm system will continue its slow decent from British Columbia tonight and become centered over Puget Sound by Friday morning. The ensuing southwest flow ahead of this system has produced a persistent, near stationary area of precipitation thats stretching across a good portion of central Idaho and western Montana today. This rain should slowly move east this evening with the focus for overnight rain shifting towards SW Montana & east of the Continental Divide. Elsewhere only light, occasional showers are anticipated with perhaps some clearing overnight in NW Montana. A weak disturbance will move out of Oregon towards the Northern Rockies on Friday. It will combine with favorable upper level jet energy and help recharge the persistent area of precipitation. And the deepening of the upper level low moving down the Washington/Oregon coastline will actually shift the precipitation back westward across Montana and into parts of central Idaho. Thus very similar conditions are expected on Friday as compared to what has transpired today (cool, wet & cloudy). The upper level low, now over Oregon, will slowly drift towards Idaho and Montana Friday night into Saturday with impulses of energy likely providing enhanced areas of precipitation over central Idaho and along the Idaho/Montana border. The center of low pressure will slowly move over western Montana late Saturday night and begin to open into a slightly more progressive wave on Sunday. However models continue their struggles in accurately depicting the timing of this transition and eventual exit of the weather system. At this time there is more evidence to support slower movement and progression, more akin to that of the ECMWF, NAM & Canadian models. Regardless, precipitation will persist Saturday night with the heaviest amounts focused across SW and west central Montana. SNOW: All models support lowering snow levels down to at least 7000ft by late Saturday night. However late afternoon model runs of the Canadian and ECMWF suggest the slower progression and overhead path of the cold, upper low could drive the snow level to somewhere between 6000ft to 6500ft under the heaviest precipitation. Anyone with camping, backpacking or hunting plans this weekend, especially in southwest Montana, should be prepared to encounter at least a mix of very cold rain and some snow. Models are now supporting additional waves of energy dropping into the Northern Rockies after the passage of this main weather system. Thus have trended chances for precipitation upward and cooled temperatures. However the more showery regime under northwest flow aloft should produce lighter amounts of rain. Mid to late next week, forecast confidence is low. However, models tend to agree that we will be in west to northwest flow aloft, which will lead to continued cool, autumn- like weather. Occasional chances for light rain cannot be ruled out, but timing any weak systems moving through the jet stream is imprudent at this time due to high run- to-run variability. && .AVIATION...Mid-level cloud currently affecting much of the area will persist. Rain showers can be expected at KMSO and KBTM this this afternoon, then more widespread showers around KSMN Friday morning. A clap of thunder near KBTM is possible, but thunderstorms look to be isolated in coverage. The most likely time for showers are listed above, but with a moist airmass in place, no location can count on totally dry runways over the next 24 hours. Winds will be light, and likely variable during showers. Although the public forecast calls for some patchy fog in some valleys of far western Montana early Friday morning, cloud cover over TAF sites are expected to prevent fog formation near terminals...a few scattered low clouds is a more likely scenario. && .MSO WATCHES/WARNINGS/ADVISORIES... MT...None. ID...None. && $$