Storm Station
Dewey, Montana
42°
Clear· Feels like 39°·Light air 4 mph WNW
Mostly cloudy, with a low around 33. Southeast wind around 2 mph.
-UV
-Air quality
47%Humidity
10%Cloud

What is measuring near here

The 5 instruments nearest Dewey, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 3.9 miles away.

measured now3 instruments

Wise River RAWSWRSM8

A remote fire weather station/3.9 mi away/6,086 ft/575 ft above here

temp, wind, gust, humidity, pressure

Rank30of 702

Butte/Bert MooneyBTM

At an airfield/21.1 mi away/5,545 ft/34 ft above here

temp, wind, gust, visibility, precip, pressure

Rank13of 702

Homestake PassMTHOM

Beside a road/23.9 mi away/6,342 ft/831 ft above here

temp, pavement temp, wind, visibility, precip

Rank593of 702

measured daily2 instruments

Dillon 19.5 NMT-BV-3

In a volunteer observer's own ground/20.7 mi away/5,014 ft/497 ft below here

precip, snowfall, snow depth

Rank-

Butte - Montana TechMTTM8

At a cooperative observer's station/21.7 mi away/5,767 ft/256 ft above here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Butte/Bert Mooney, drawn

The nearest airport reporting now, 21.1 mi from Dewey. From its report of Sep 27, 2026, 3:53 AM local time: 3 of its 6 sheets.

The sky

No cloud below 12,000 ft; visibility 10 mi or more.

Section of the sky over Butte/Bert Mooney, height above the station to scale: no cloud detected below 12,000 feet, the reach of its ceilometer, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT BTMFIG. A THE SKY OVER BUTTE/BERT MOONEYSECTION, HEIGHT ABOVE THE STATION TO SCALE, EACH LAYER AT THE HEIGHT OF ITS BASE AS REPORTED; COVER IN EIGHTHS OF THE SKY; TOPS NOT MEASUREDFT ABOVE THE STATION05001,0001,5002,0002,5003,000ETAGESLOWTHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETNO CLOUD DETECTED BELOW 12,000 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEButte/Bert Mooney, the skySTATION REPORT · ASOS BTMTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-09-27IDSR-BTM-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

31.0 F with a dew point of 24.0 F, 75 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,600 ft up.

Chart of the air at Butte/Bert Mooney: temperature 31.0 degrees Fahrenheit and dew point 24.0, 75 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,600 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT BTMFIG. B THE AIR AT BUTTE/BERT MOONEYTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00010 F20 F30 F40 FSATURATES 1,600 FT ABOVE THE STATION, AT 22.5 FTEMPERATURE 31.0 FDEW POINT 24.0 FSPREAD 7.0 FRELATIVE HUMIDITY 75 PER CENTTHE AIR COOLS ABOUT 5.4 F EACH 1,000 FT IT RISES, AND ITS DEW POINT ABOUT 1 FSOLID: THE LIFTED AIR'S TEMPERATURE; DASHED: ITS DEW POINTTITLEButte/Bert Mooney, the airSTATION REPORT · ASOS BTMTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-09-27IDSR-BTM-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

Calm.

Plan of the wind at Butte/Bert Mooney, north up: calm; beside it the Beaufort scale from calm to hurricane force, force 0, calm, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT BTMFIG. C THE WIND AT BUTTE/BERT MOONEYPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONCALMBEAUFORT FORCELEAST WIND, MPH0CALM0NOW, 0 MPH1LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEButte/Bert Mooney, the windSTATION REPORT · ASOS BTMTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-09-27IDSR-BTM-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Butte/Bert Mooney, in 6 sheets, each beside the Field Book plates that explain it

-in

Snow on the ground

Elsewhere in Montana

20 places, each with its own forecast and its own instruments.

Near Dewey

The nearest places, each with its own forecast and the instruments nearest it.