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Mammoth, Wyoming

Community in Park County, Wyoming

Air quality

The air at Mammoth

Index 35, good, led by ozone. Read at 8 PM from its reporting area, Yellowstone National Park (MT), 32 miles off.

35Good
  • Ozone35Good-

The days ahead

Yesterday measured 32, good.

Smoke, the next 41 hours

Little smoke near the ground through Sat 12 PM: the index from smoke stays at 6 or under.

ThuFriSat

Precipitation

What has fallen at Mammoth

None in the last 3 days, to Thu 7 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 Mammoth, the next 41 hours

Visibility stays 10 miles or more through Sat 12 PM.

ThuFriSat

On the radar over Mammoth, WyomingReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 3 instruments nearest Mammoth, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.4 miles away.

measured now2 instruments

measured daily1 instrument

YNP Mammoth - COOPYLWW4

At a cooperative observer's station/0.4 mi away/6,024 ft/3 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Yellowstone (RAMOS), drawn

The nearest airport reporting now, 32.4 mi from Mammoth, Wyoming. From its report of Oct 15, 2026, 7:56 PM local time: 3 of its 5 sheets.

The air

30.0 F with a dew point of 21.0 F, 69 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 2,000 ft up.

Chart of the air at Yellowstone (RAMOS): temperature 30.0 degrees Fahrenheit and dew point 21.0, 69 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 2,000 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT P60FIG. B THE AIR AT YELLOWSTONE (RAMOS)THE 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 2,000 FT ABOVE THE STATION, AT 19.1 FTEMPERATURE 30.0 FDEW POINT 21.0 FSPREAD 9.0 FRELATIVE HUMIDITY 69 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 POINTTITLEYellowstone (RAMOS), the airSTATION REPORT · ASOS P60TYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 5DATE2026-10-16IDSR-P60-1DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

At 3 mph: force 1, a light air on the Beaufort scale.

Plan of the wind at Yellowstone (RAMOS), north up: at 3 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 1, light air, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT P60FIG. C THE WIND AT YELLOWSTONE (RAMOS)PLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONDIRECTION NOT REPORTEDBEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR1NOW, 3 MPH2LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEYellowstone (RAMOS), the windSTATION REPORT · ASOS P60TYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 2 of 5DATE2026-10-16IDSR-P60-2DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The column

At 7,769 ft above sea level, 25 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 22.42 inHg and the temperature at 31.3 F; the station's altimeter setting of 30.71 inHg means its barometer reads 23.01 inHg; it reports 30.0 F, 1.3 F colder than standard.

Section from sea level of where Yellowstone (RAMOS) stands in the atmosphere, height to scale: the station 7,769 feet above sea level with 25 per cent of the air below it; the standard atmosphere's pressure there, 22.42 inches of mercury, and temperature, 31.3 degrees Fahrenheit; the altimeter setting of 30.71 and the station pressure it means, 23.01.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT P60FIG. D WHERE YELLOWSTONE (RAMOS) STANDS IN THE ATMOSPHERESECTION FROM SEA LEVEL, HEIGHT TO SCALE, THE STATION IN THE STANDARD ATMOSPHEREFT ABOVE SEA LEVEL05,00010,00015,00020,000SEA LEVEL, 29.92 inHg IN THE STANDARD ATMOSPHEREYELLOWSTONE (RAMOS)25 PER CENT OF THE AIR BELOW IT7,769 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 FT50 PER CENT OF THE AIR BELOW, 17,970 FTSTANDARD PRESSURE HERE22.42 inHgSTANDARD TEMPERATURE HERE31.3 FALTIMETER SETTING, REPORTED30.71 inHgITS BAROMETER READS23.01 inHgTEMPERATURE, REPORTED30.0 FTITLEYellowstone (RAMOS), the columnSTATION REPORT · ASOS P60TYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 3 of 5DATE2026-10-16IDSR-P60-3DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

The full report of Yellowstone (RAMOS), in 5 sheets, each beside the Field Book plates that explain it

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Snow on the ground

Elsewhere in Wyoming

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.

Near Mammoth

River and lake gauges