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Mammoth, Pennsylvania

Community in Westmoreland County, Pennsylvania

Air quality

The air at Mammoth

Index 28, good, led by fine particles. Read at 11 PM from its reporting area, Mon Valley Area (PA), 23 miles off.

28Good
  • Fine particles (PM2.5)28Good7.7 mi
  • Ozone-14 ppb7.7 mi

The days ahead

Good each day through Sun Oct 18, led by fine particles. Yesterday measured 56, moderate.

Smoke, the next 46 hours

Little smoke near the ground through Sat 8 PM: the index from smoke stays at 11 or under.

FriSat

Precipitation

What has fallen at Mammoth

0.03 in in the last 24 hours, 0.37 in over the last 3 days, to Thu 10 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.03in
Last 3 days
0.37in

Visibility

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

Fog: visibility falls to 0.5 miles Fri 2 PM, under a mile for 1 hour.

FriSat

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

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 3.3 miles away.

measured now4 instruments

Quarry TrailQTRP1

At a river or reservoir gauge/13.8 mi away/2,749 ft/1,595 ft above here

temp, wind, gust, humidity, pressure

Rank339of 1,383

measured daily2 instruments

Latrobe 5.6 SSWPA-WT-11

In a volunteer observer's own ground/3.3 mi away/1,279 ft/125 ft above here

precip, snowfall, snow depth

Rank-

Donegal 2 NwACEP1

At a cooperative observer's station/5.3 mi away/1,772 ft/618 ft above here

snowfall, snow depth, precip, high, low

Rank1,128of 1,383

Station report

The weather at Latrobe/Westmorland, drawn

The nearest airport reporting now, 6.2 mi from Mammoth, Pennsylvania. From its report of Oct 15, 2026, 11:15 PM local time: 3 of its 6 sheets.

The sky

Overcast at 1,300 ft; the ceiling is 1,300 ft; visibility 9 mi.

Section of the sky over Latrobe/Westmorland, height above the station to scale: overcast cloud with its base at 1,300 feet, the ceiling at 1,300 feet, and visibility of 9 mi.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT LBEFIG. A THE SKY OVER LATROBE/WESTMORLANDSECTION, 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 SHEETOVC 1,300 FTOVERCAST, 8 EIGHTHS OF THE SKYCEILING 1,300 FTVISIBILITY, MILES: 9 MI0510TITLELatrobe/Westmorland, the skySTATION REPORT · ASOS LBETYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-LBE-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

66.2 F with a dew point of 62.6 F, 88 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 800 ft up; the lowest cloud reported is at 1,300 ft.

Chart of the air at Latrobe/Westmorland: temperature 66.2 degrees Fahrenheit and dew point 62.6, 88 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 800 feet above the station, against the lowest cloud reported at 1,300 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT LBEFIG. B THE AIR AT LATROBE/WESTMORLANDTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00050 F60 F70 F80 FSATURATES 800 FT ABOVE THE STATION, AT 61.7 FLOWEST CLOUD REPORTED, OVC 1,300 FTTEMPERATURE 66.2 FDEW POINT 62.6 FSPREAD 3.6 FRELATIVE HUMIDITY 88 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 POINTTITLELatrobe/Westmorland, the airSTATION REPORT · ASOS LBETYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-LBE-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

Calm.

Plan of the wind at Latrobe/Westmorland, 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 LBEFIG. C THE WIND AT LATROBE/WESTMORLANDPLAN, 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 FORCE73TITLELatrobe/Westmorland, the windSTATION REPORT · ASOS LBETYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-LBE-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

0in

Snow on the ground

Measured at Donegal 2 Nw (ACEP1), 5.3 miles from here, read 15 Oct, 07:00. measured daily

Elsewhere in Pennsylvania

24 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