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Portersville, Pennsylvania

Borough in Butler County, Pennsylvania

Air quality

The air at Portersville

Index 30, good, led by ozone. Read at 7 PM from its reporting area, Mercer County (PA), 23 miles off.

30Good
  • Fine particles (PM2.5)5Good15.3 mi
  • Ozone30Good16 ppb15.3 mi

The days ahead

Good each day through Tue Oct 20, led by fine particles. Yesterday measured 19, good.

Smoke, the next 43 hours

No smoke near the ground through Mon 2 PM.

SatSunMon

Precipitation

What has fallen at Portersville

0.24 in in the last 24 hours, 0.50 in over the last 3 days, to Sat 7 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.24in
Last 3 days
0.50in

Visibility

How far you can see at Portersville, the next 43 hours

Visibility stays 10 miles or more through Mon 2 PM.

SatSunMon

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

What is measuring near here

The 6 instruments nearest Portersville, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 2.3 miles away.

measured now4 instruments

ZelienoplePJC

At an airfield/8.6 mi away/895 ft/490 ft below here

temp, wind, gust, visibility, precip, pressure

Rank763of 1,397

measured daily2 instruments

Portersville 2.4 NNWPA-BT-68

In a volunteer observer's own ground/2.3 mi away/1,258 ft/127 ft below here

precip, snowfall, snow depth

Rank-

Station report

The weather at Zelienople, drawn

The nearest airport reporting now, 8.6 mi from Portersville, Pennsylvania. From its report of Oct 17, 2026, 8:15 PM 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 Zelienople, 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 PJCFIG. A THE SKY OVER ZELIENOPLESECTION, 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 MORE0510TITLEZelienople, the skySTATION REPORT · ASOS PJCTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-18IDSR-PJC-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

35.6 F with a dew point of 33.8 F, 93 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 400 ft up.

Chart of the air at Zelienople: temperature 35.6 degrees Fahrenheit and dew point 33.8, 93 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 400 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT PJCFIG. B THE AIR AT ZELIENOPLETHE 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 400 FT ABOVE THE STATION, AT 33.4 FTEMPERATURE AND DEW POINT 35.6 F, 33.8 FRELATIVE HUMIDITY 93 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 POINTTITLEZelienople, the airSTATION REPORT · ASOS PJCTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-18IDSR-PJC-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 Zelienople, 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 PJCFIG. C THE WIND AT ZELIENOPLEPLAN, 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 FORCE73TITLEZelienople, the windSTATION REPORT · ASOS PJCTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-18IDSR-PJC-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

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Snow on the ground

Elsewhere in Pennsylvania

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

Near Portersville

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

Near Portersville

River and lake gauges