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Jacobus, Pennsylvania

Borough in York County, Pennsylvania

Air quality

The air at Jacobus

Index 35, good, led by fine particles. Read at 2 AM from its reporting area, Susquehanna Valley (PA), 7 miles off.

35Good
  • Fine particles (PM2.5)35Good6 mi
  • Ozone20Good21 ppb6 mi

The days ahead

Good each day through Sun Oct 18, led by fine particles. Yesterday measured 28, good.

Smoke, the next 43 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 Jacobus

None in the last 24 hours; 0.10 in over the last 3 days, to Fri 1 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.00in
Last 3 days
0.10in

Visibility

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

Mist or haze: visibility falls to 2 miles Fri 6 AM.

FriSat

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

What is measuring near here

The 6 instruments nearest Jacobus, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 2.1 miles away.

measured now4 instruments

measured daily2 instruments

Seven Valleys 1.3 ENEPA-YR-44

In a volunteer observer's own ground/2.1 mi away/544 ft/77 ft below here

precip, snowfall, snow depth

Rank-

Spring GroveSGRP1

At a cooperative observer's station/8.0 mi away/472 ft/149 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Thomasville/York, drawn

The nearest airport reporting now, 8.6 mi from Jacobus, Pennsylvania. From its report of Oct 16, 2026, 1:29 AM local time: 3 of its 6 sheets.

The sky

Broken at 1,500 ft, overcast at 2,000 ft; the ceiling is 1,500 ft; visibility 9 mi.

Section of the sky over Thomasville/York, height above the station to scale: broken cloud with its base at 1,500 feet, overcast cloud with its base at 2,000 feet, the ceiling at 1,500 feet, and visibility of 9 mi.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT THVFIG. A THE SKY OVER THOMASVILLE/YORKSECTION, 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 2,000 FTOVERCAST, 8 EIGHTHS OF THE SKYBKN 1,500 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYCEILING 1,500 FTVISIBILITY, MILES: 9 MI0510TITLEThomasville/York, the skySTATION REPORT · ASOS THVTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-THV-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

59.0 F with a dew point of 56.0 F, 90 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 700 ft up; the lowest cloud reported is at 1,500 ft.

Chart of the air at Thomasville/York: temperature 59.0 degrees Fahrenheit and dew point 56.0, 90 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 700 feet above the station, against the lowest cloud reported at 1,500 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT THVFIG. B THE AIR AT THOMASVILLE/YORKTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00040 F50 F60 F70 FSATURATES 700 FT ABOVE THE STATION, AT 55.3 FLOWEST CLOUD REPORTED, BKN 1,500 FTTEMPERATURE 59.0 FDEW POINT 56.0 FSPREAD 3.0 FRELATIVE HUMIDITY 90 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 POINTTITLEThomasville/York, the airSTATION REPORT · ASOS THVTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-THV-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the south (190 degrees) at 3 mph: force 1, a light air on the Beaufort scale.

Plan of the wind at Thomasville/York, north up: blowing from 190 degrees, the south, at 3 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 1, light air, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT THVFIG. C THE WIND AT THOMASVILLE/YORKPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 190°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR1NOW, 3 MPH2LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEThomasville/York, the windSTATION REPORT · ASOS THVTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-THV-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Thomasville/York, 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 Jacobus

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

Near Jacobus

River and lake gauges