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Jerome, Pennsylvania

Community in Somerset County, Pennsylvania

Air quality

The air at Jerome

Index 21, good, led by ozone. Read at 7 AM from its reporting area, Johnstown (PA), 9 miles off.

21Good
  • Fine particles (PM2.5)11Good7.9 mi
  • Ozone21Good23 ppb7.9 mi

The days ahead

Good each day through Tue Oct 20, led by fine particles. Yesterday measured 28, good.

Smoke, the next 44 hours

No smoke near the ground through Mon 2 AM.

SatSun

Precipitation

What has fallen at Jerome

0.16 in in the last 24 hours, 0.62 in over the last 3 days, to Sat 6 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.16in
Last 3 days
0.62in

Visibility

How far you can see at Jerome, the next 44 hours

Visibility stays 10 miles or more through Mon 2 AM.

SatSun

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

What is measuring near here

The 6 instruments nearest Jerome, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 2.0 miles away.

measured now4 instruments

Quarry TrailQTRP1

At a river or reservoir gauge/13.3 mi away/2,749 ft/902 ft above here

temp, wind, gust, humidity, pressure

Rank309of 1,394

measured daily2 instruments

Elim 0.2 NEPA-CM-3

In a volunteer observer's own ground/6.6 mi away/1,663 ft/184 ft below here

precip, snowfall, snow depth

Rank-

Station report

The weather at Johnstown/Cambria, drawn

The nearest airport reporting now, 10.8 mi from Jerome, Pennsylvania. From its report of Oct 17, 2026, 7:01 AM local time: 3 of its 6 sheets.

The sky

Broken at 1,800 ft; the ceiling is 1,800 ft; visibility 10 mi or more.

Section of the sky over Johnstown/Cambria, height above the station to scale: broken cloud with its base at 1,800 feet, the ceiling at 1,800 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT JSTFIG. A THE SKY OVER JOHNSTOWN/CAMBRIASECTION, 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 SHEETBKN 1,800 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYCEILING 1,800 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEJohnstown/Cambria, the skySTATION REPORT · ASOS JSTTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-17IDSR-JST-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

40.0 F with a dew point of 35.0 F, 82 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,100 ft up; the lowest cloud reported is at 1,800 ft.

Chart of the air at Johnstown/Cambria: temperature 40.0 degrees Fahrenheit and dew point 35.0, 82 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,100 feet above the station, against the lowest cloud reported at 1,800 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT JSTFIG. B THE AIR AT JOHNSTOWN/CAMBRIATHE 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 F50 FSATURATES 1,100 FT ABOVE THE STATION, AT 33.9 FLOWEST CLOUD REPORTED, BKN 1,800 FTTEMPERATURE 40.0 FDEW POINT 35.0 FSPREAD 5.0 FRELATIVE HUMIDITY 82 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 POINTTITLEJohnstown/Cambria, the airSTATION REPORT · ASOS JSTTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-17IDSR-JST-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the north (350 degrees) at 8 mph: force 3, a gentle breeze on the Beaufort scale. The strongest gust today was 25 mph.

Plan of the wind at Johnstown/Cambria, north up: blowing from 350 degrees, the north, at 8 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 3, gentle breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT JSTFIG. C THE WIND AT JOHNSTOWN/CAMBRIAPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 350°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE8NOW, 8 MPH4MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEJohnstown/Cambria, the windSTATION REPORT · ASOS JSTTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-17IDSR-JST-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

0in

Snow on the ground

Measured at Laughlintown 1SE (RRFP1), 12.2 miles from here, read 15 Oct, 08:00. measured daily

Elsewhere in Pennsylvania

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

Near Jerome

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

Near Jerome

River and lake gauges