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Helmville, Montana

Community in Powell County, Montana

Air quality

The air at Helmville

Index 48, good, led by fine particles. Read at 9 PM from its reporting area, Seeley Lake (MT), 33 miles off.

48Good
  • Fine particles (PM2.5)48Good-

The days ahead

Yesterday measured 54, moderate.

Smoke, the next 46 hours

Little smoke near the ground through Sat 6 PM: the index from smoke stays at 6 or under.

FriSat

Precipitation

What has fallen at Helmville

None in the last 3 days, to Thu 8 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.00in
Last 3 days
0.00in

Visibility

How far you can see at Helmville, the next 46 hours

Visibility stays 10 miles or more through Sat 6 PM.

FriSat

On the radar over Helmville, MontanaReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 4 instruments nearest Helmville, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 7.3 miles away.

measured now2 instruments

measured daily2 instruments

Ovando 2.9 SWMT-PW-3

In a volunteer observer's own ground/13.4 mi away/4,057 ft/249 ft below here

precip, snowfall, snow depth

Rank-

Lincoln Ranger StationLINM8

At a fire lookout or ranger station/16.0 mi away/4,603 ft/297 ft above here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Helmville MT-200 MP 53.3, drawn

The nearest instrument reporting now, 7.3 mi from Helmville, Montana. From its report of Oct 15, 2026, 9:00 PM local time: 3 of its 5 sheets.

The air

34.0 F with a dew point of 28.2 F, 79 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,300 ft up.

Chart of the air at Helmville MT-200 MP 53.3: temperature 34.0 degrees Fahrenheit and dew point 28.2, 79 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,300 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MTHLMFIG. B THE AIR AT HELMVILLE MT-200 MP 53.3THE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00020 F30 F40 FSATURATES 1,300 FT ABOVE THE STATION, AT 26.9 FTEMPERATURE 34.0 FDEW POINT 28.2 FSPREAD 5.8 FRELATIVE HUMIDITY 79 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 POINTTITLEHelmville MT-200 MP 53.3, the airSTATION REPORT · RWIS MTHLMTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 5DATE2026-10-16IDSR-MTHLM-1DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

Calm.

Plan of the wind at Helmville MT-200 MP 53.3, 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 MTHLMFIG. C THE WIND AT HELMVILLE MT-200 MP 53.3PLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONCALMBEAUFORT FORCELEAST WIND, MPH0CALM0NOW, 0 MPH1LIGHT AIR1GUST, 1 MPH2LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEHelmville MT-200 MP 53.3, the windSTATION REPORT · RWIS MTHLMTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 2 of 5DATE2026-10-16IDSR-MTHLM-2DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008

The column

At 4,327 ft above sea level, 15 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 25.53 inHg and the temperature at 43.6 F; it reports 34.0 F, 9.6 F colder than standard.

Section from sea level of where Helmville MT-200 MP 53.3 stands in the atmosphere, height to scale: the station 4,327 feet above sea level with 15 per cent of the air below it; the standard atmosphere's pressure there, 25.53 inches of mercury, and temperature, 43.6 degrees Fahrenheit.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MTHLMFIG. D WHERE HELMVILLE MT-200 MP 53.3 STANDS IN THE ATMOSPHERESECTION FROM SEA LEVEL, HEIGHT TO SCALE, THE STATION IN THE STANDARD ATMOSPHEREFT ABOVE SEA LEVEL05,00010,00015,000SEA LEVEL, 29.92 inHg IN THE STANDARD ATMOSPHEREHELMVILLE MT-200 MP 53.315 PER CENT OF THE AIR BELOW IT4,327 FT10 PER CENT OF THE AIR BELOW, 2,890 FT20 PER CENT OF THE AIR BELOW, 6,050 FT30 PER CENT OF THE AIR BELOW, 9,540 FT40 PER CENT OF THE AIR BELOW, 13,470 FTSTANDARD PRESSURE HERE25.53 inHgSTANDARD TEMPERATURE HERE43.6 FTEMPERATURE, REPORTED34.0 FTITLEHelmville MT-200 MP 53.3, the columnSTATION REPORT · RWIS MTHLMTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 3 of 5DATE2026-10-16IDSR-MTHLM-3DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

The full report of Helmville MT-200 MP 53.3, in 5 sheets, each beside the Field Book plates that explain it

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Snow on the ground

Elsewhere in Montana

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

Near Helmville

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

Near Helmville

River and lake gauges