Storm Station
Mammoth, Montana
44°
Mostly clear· Feels like 42°·Light air 4 mph WSW
Mostly cloudy, with a low around 33. Southwest wind around 3 mph.
-UV
-Air quality
38%Humidity
19%Cloud

What is measuring near here

The 6 instruments nearest Mammoth, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 11.3 miles away.

measured now4 instruments

Twin BridgesRVF

At an airfield/16.5 mi away/4,756 ft/1,267 ft below here

temp, wind, gust, visibility, precip, pressure

Rank25of 702

Norris Hill US-287 MP 60MTNOR

Beside a road/19.5 mi away/5,715 ft/308 ft below here

temp, pavement temp, wind, visibility, precip

Rank641of 702

Table MountainS0808

At a soil climate station/22.8 mi away/4,474 ft/1,549 ft below here

temp, humidity, soil temp, soil moisture

Rank-

measured daily2 instruments

Harrison 1.0 ENEMT-MD-7

In a volunteer observer's own ground/12.5 mi away/4,885 ft/1,138 ft below here

precip, snowfall, snow depth

Rank-

Station report

The weather at Twin Bridges, drawn

The nearest airport reporting now, 16.5 mi from Mammoth. 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 Twin Bridges, 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 RVFFIG. A THE SKY OVER TWIN BRIDGESSECTION, 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 MORE0510TITLETwin Bridges, the skySTATION REPORT · ASOS RVFTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-09-27IDSR-RVF-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

42.8 F with a dew point of 23.0 F, 45 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 4,500 ft up.

Chart of the air at Twin Bridges: temperature 42.8 degrees Fahrenheit and dew point 23.0, 45 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 4,500 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT RVFFIG. B THE AIR AT TWIN BRIDGESTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,0005,0006,00010 F20 F30 F40 F50 FSATURATES 4,500 FT ABOVE THE STATION, AT 18.9 FTEMPERATURE 42.8 FDEW POINT 23.0 FSPREAD 19.8 FRELATIVE HUMIDITY 45 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 POINTTITLETwin Bridges, the airSTATION REPORT · ASOS RVFTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-09-27IDSR-RVF-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the northeast (40 degrees) at 16 mph: force 4, a moderate breeze on the Beaufort scale. The strongest gust today was 24 mph.

Plan of the wind at Twin Bridges, north up: blowing from 40 degrees, the northeast, at 16 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 4, moderate breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT RVFFIG. C THE WIND AT TWIN BRIDGESPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 40°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE13NOW, 16 MPH5FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLETwin Bridges, the windSTATION REPORT · ASOS RVFTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-09-27IDSR-RVF-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

0in

Snow on the ground

Measured at Madison River 6 NE McAllister below Ennis Lake (MADM8), 22.6 miles from here, read 26 Sep, 15:30. measured daily

Elsewhere in Montana

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

Near Mammoth

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