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Thorndale, Pennsylvania

Community in Chester County, Pennsylvania

Air quality

The air at Thorndale

Index 15, good, led by ozone. Read at 2 AM from its reporting area, Wilmington Area (DE), 21 miles off.

15Good
  • Fine particles (PM2.5)14Good11.5 mi
  • Ozone15Good-
  • Coarse particles (PM10)7Good-

The days ahead

Yesterday measured 25, good.

Smoke, the next 42 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 Thorndale

None in the last 24 hours; 0.04 in over the last 3 days, to Fri 2 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.00in
Last 3 days
0.04in

Visibility

How far you can see at Thorndale, the next 42 hours

Fog: visibility falls to 0.7 miles Fri 8 AM, under a mile for 1 hour.

FriSat

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

What is measuring near here

The 7 instruments nearest Thorndale, 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 now5 instruments

measured daily2 instruments

Downingtown 0.7 WSWPA-CH-37

In a volunteer observer's own ground/2.0 mi away/276 ft/44 ft below here

precip, snowfall, snow depth

Rank-

Spring City 2WSWSGCP1

At a cooperative observer's station/14.9 mi away/253 ft/67 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Coatesville, drawn

The nearest airport reporting now, 6.2 mi from Thorndale, Pennsylvania. From its report of Oct 16, 2026, 12:55 AM local time: 3 of its 6 sheets.

The sky

No cloud reported; visibility 10 mi or more.

Section of the sky over Coatesville, height above the station to scale: no cloud reported, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MQSFIG. A THE SKY OVER COATESVILLESECTION, 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 REPORTEDVISIBILITY, MILES: 10 MI OR MORE0510TITLECoatesville, the skySTATION REPORT · ASOS MQSTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-MQS-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

57.4 F with a dew point of 57.0 F, 99 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 100 ft up.

Chart of the air at Coatesville: temperature 57.4 degrees Fahrenheit and dew point 57.0, 99 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 100 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MQSFIG. B THE AIR AT COATESVILLETHE 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 FSATURATES 100 FT ABOVE THE STATION, AT 56.9 FTEMPERATURE AND DEW POINT 57.4 F, 57.0 FRELATIVE HUMIDITY 99 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 POINTTITLECoatesville, the airSTATION REPORT · ASOS MQSTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-MQS-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 Coatesville, 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 MQSFIG. C THE WIND AT COATESVILLEPLAN, 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 FORCE73TITLECoatesville, the windSTATION REPORT · ASOS MQSTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-MQS-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Coatesville, 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 Thorndale

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

Near Thorndale

River and lake gauges