Storm Station
Big Arm, Montana
43°
Clear· Feels like 43°·Light air 3 mph W
Mostly cloudy, with a low around 40. Wind around 0 mph.
-UV
-Air quality
53%Humidity
9%Cloud

What is measuring near here

The 5 instruments nearest Big Arm, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 3.3 miles away.

measured now3 instruments

Jette RAWSJETM8

A remote fire weather station/3.3 mi away/3,635 ft/614 ft above here

temp, wind, gust, humidity, pressure

Rank90of 702

Elmo US-93 MP 77.5MTELM

Beside a road/3.5 mi away/2,910 ft/111 ft below here

temp, pavement temp, wind, visibility, precip

Rank641of 702

Ronanairport7S0

At an airfield/18.0 mi away/3,079 ft/58 ft above here

temp, wind, gust, visibility, precip, pressure

Rank9of 702

measured daily2 instruments

Polson Kerr DamKERM8

At a dam/8.5 mi away/2,733 ft/288 ft below here

snowfall, snow depth, precip, high, low

Rank-

Polson 1.0 SSEMT-LK-17

In a volunteer observer's own ground/10.6 mi away/3,370 ft/349 ft above here

precip, snowfall, snow depth

Rank-

Station report

The weather at Ronanairport, drawn

The nearest airport reporting now, 18.0 mi from Big Arm. From its report of Sep 27, 2026, 3:35 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 Ronanairport, 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 7S0FIG. A THE SKY OVER RONANAIRPORTSECTION, 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 MORE0510TITLERonanairport, the skySTATION REPORT · ASOS 7S0TYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-09-27IDSR-7S0-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

32.0 F with a dew point of 32.0 F, 100 per cent relative humidity. The air is saturated at the ground.

Chart of the air at Ronanairport: temperature 32.0 degrees Fahrenheit and dew point 32.0, 100 per cent relative humidity; the air saturated at the ground; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT 7S0FIG. B THE AIR AT RONANAIRPORTTHE 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 FSATURATED AT THE GROUNDTEMPERATURE AND DEW POINT 32.0 F, 32.0 FRELATIVE HUMIDITY 100 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 POINTTITLERonanairport, the airSTATION REPORT · ASOS 7S0TYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-09-27IDSR-7S0-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the northeast (40 degrees) at 6 mph: force 2, a light breeze on the Beaufort scale.

Plan of the wind at Ronanairport, north up: blowing from 40 degrees, the northeast, at 6 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 2, light breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT 7S0FIG. C THE WIND AT RONANAIRPORTPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 40°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE4NOW, 6 MPH3GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLERonanairport, the windSTATION REPORT · ASOS 7S0TYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-09-27IDSR-7S0-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Ronanairport, in 6 sheets, each beside the Field Book plates that explain it

0in

Snow on the ground

Measured at Polson Kerr Dam (KERM8), 8.5 miles from here, read 26 Sep, 18:00. measured daily

Elsewhere in Montana

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

Near Big Arm

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