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Rosslyn Farms, Pennsylvania

Borough in Allegheny County, Pennsylvania

Air quality

The air at Rosslyn Farms

Index 44, good, led by fine particles. Read at 1 AM from its reporting area, Pittsburgh (PA), 14 miles off.

44Good
  • Fine particles (PM2.5)44Good5.7 mi
  • Ozone17Good12 ppb5.7 mi

The days ahead

Good each day through Sun Oct 18, led by fine particles. Yesterday measured 31, good.

Smoke, the next 44 hours

Little smoke near the ground through Sat 8 PM: the index from smoke stays at 6 or under.

FriSat

Precipitation

What has fallen at Rosslyn Farms

None in the last 24 hours; 0.50 in over the last 3 days, to Fri 12 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.00in
Last 3 days
0.50in

Visibility

How far you can see at Rosslyn Farms, the next 44 hours

Visibility stays 6 miles or more through Sat 8 PM, lowest 6 miles Fri 2 PM.

FriSat

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

What is measuring near here

The 6 instruments nearest Rosslyn Farms, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.2 miles away.

measured now4 instruments

measured daily2 instruments

Pittsburgh 3.9 WPA-AL-24

In a volunteer observer's own ground/1.2 mi away/931 ft/100 ft below here

precip, snowfall, snow depth

Rank-

Station report

The weather at Pittsburgh INTL, drawn

The nearest airport reporting now, 8.9 mi from Rosslyn Farms, Pennsylvania. From its report of Oct 16, 2026, 12:51 AM local time: 3 of its 6 sheets.

The sky

Overcast at 300 ft; the ceiling is 300 ft; visibility 6 mi.

Section of the sky over Pittsburgh INTL, height above the station to scale: overcast cloud with its base at 300 feet, the ceiling at 300 feet, and visibility of 6 mi.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT PITFIG. A THE SKY OVER PITTSBURGH INTLSECTION, 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 300 FTOVERCAST, 8 EIGHTHS OF THE SKYCEILING 300 FTVISIBILITY, MILES: 6 MI0510TITLEPittsburgh INTL, the skySTATION REPORT · ASOS PITTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-PIT-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

65.0 F with a dew point of 64.0 F, 97 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 200 ft up; the lowest cloud reported is at 300 ft.

Chart of the air at Pittsburgh INTL: temperature 65.0 degrees Fahrenheit and dew point 64.0, 97 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 200 feet above the station, against the lowest cloud reported at 300 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT PITFIG. B THE AIR AT PITTSBURGH INTLTHE 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 200 FT ABOVE THE STATION, AT 63.8 FLOWEST CLOUD REPORTED, OVC 300 FTTEMPERATURE AND DEW POINT 65.0 F, 64.0 FRELATIVE HUMIDITY 97 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 POINTTITLEPittsburgh INTL, the airSTATION REPORT · ASOS PITTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-PIT-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the south southeast (160 degrees) at 5 mph: force 2, a light breeze on the Beaufort scale.

Plan of the wind at Pittsburgh INTL, north up: blowing from 160 degrees, the south southeast, at 5 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 2, light breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT PITFIG. C THE WIND AT PITTSBURGH INTLPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 160°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE4NOW, 5 MPH3GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEPittsburgh INTL, the windSTATION REPORT · ASOS PITTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-PIT-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

0in

Snow on the ground

Measured at Emsworth Dam (EMSP1), 5.5 miles from here, read 15 Oct, 06:00. measured daily

Elsewhere in Pennsylvania

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

Near Rosslyn Farms

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

Near Rosslyn Farms

River and lake gauges