Storm Station
Sign in

Mount Gretna, Pennsylvania

Borough in Lebanon County, Pennsylvania

Air quality

The air at Mount Gretna

Index 54, moderate, led by fine particles. Read at 2 PM from its reporting area, Susquehanna Valley (PA), 23 miles off.

54Moderate
  • Fine particles (PM2.5)54Moderate11.3 mi
  • Ozone22Good23 ppb11.3 mi

The days ahead

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

Smoke, the next 43 hours

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

FriSatSun

Precipitation

What has fallen at Mount Gretna

None in the last 3 days, to Fri 1 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.00in
Last 3 days
0.00in

Visibility

How far you can see at Mount Gretna, the next 43 hours

Mist or haze: visibility falls to 2 miles Fri 5 PM.

FriSatSun

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

What is measuring near here

The 7 instruments nearest Mount Gretna, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 3.8 miles away.

measured now5 instruments

LancasterLNS

At an airfield/12.7 mi away/404 ft/318 ft below here

temp, wind, gust, visibility, precip, pressure

Rank13of 1,383

measured daily2 instruments

LebanonLEBP1

At a cooperative observer's station/4.9 mi away/486 ft/236 ft below here

snowfall, snow depth, precip, high, low

Rank-

Lebanon 2.9 WSWPA-LB-16

In a volunteer observer's own ground/5.5 mi away/450 ft/272 ft below here

precip, snowfall, snow depth

Rank-

Station report

The weather at Lancaster, drawn

The nearest airport reporting now, 12.7 mi from Mount Gretna, Pennsylvania. From its report of Oct 16, 2026, 1:53 PM local time: 3 of its 6 sheets.

The sky

Scattered at 1,400 ft; visibility 10 mi or more.

Section of the sky over Lancaster, height above the station to scale: scattered cloud with its base at 1,400 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT LNSFIG. A THE SKY OVER LANCASTERSECTION, 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 SHEETSCT 1,400 FTSCATTERED, 3 TO 4 EIGHTHS OF THE SKYVISIBILITY, MILES: 10 MI OR MORE0510TITLELancaster, the skySTATION REPORT · ASOS LNSTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-LNS-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

75.0 F with a dew point of 66.0 F, 74 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 2,100 ft up; the lowest cloud reported is at 1,400 ft.

Chart of the air at Lancaster: temperature 75.0 degrees Fahrenheit and dew point 66.0, 74 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 2,100 feet above the station, against the lowest cloud reported at 1,400 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT LNSFIG. B THE AIR AT LANCASTERTHE 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 F90 FSATURATES 2,100 FT ABOVE THE STATION, AT 63.9 FLOWEST CLOUD REPORTED, SCT 1,400 FTTEMPERATURE 75.0 FDEW POINT 66.0 FSPREAD 9.0 FRELATIVE HUMIDITY 74 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 POINTTITLELancaster, the airSTATION REPORT · ASOS LNSTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-LNS-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the south southwest (210 degrees) at 9 mph: force 3, a gentle breeze on the Beaufort scale. The strongest gust today was 20 mph.

Plan of the wind at Lancaster, north up: blowing from 210 degrees, the south southwest, at 9 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 LNSFIG. C THE WIND AT LANCASTERPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 210°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE8NOW, 9 MPH4MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLELancaster, the windSTATION REPORT · ASOS LNSTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-LNS-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

-

Snow on the ground

Elsewhere in Pennsylvania

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

Near Mount Gretna

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

Near Mount Gretna

River and lake gauges