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Emmaus, Pennsylvania

Borough in Lehigh County, Pennsylvania

Air quality

The air at Emmaus

Index 23, good, led by ozone. Read at 11 PM from its reporting area, Lehigh Valley (PA), 7 miles off.

23Good
  • Fine particles (PM2.5)17Good6.1 mi
  • Ozone23Good24 ppb6.1 mi

The days ahead

Good each day through Sun Oct 18, led by fine particles. Yesterday measured 50, good.

Smoke, the next 46 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 Emmaus

None in the last 24 hours; 0.10 in over the last 3 days, to Thu 10 PM. 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 Emmaus, the next 46 hours

Mist or haze: visibility falls to 2 miles Fri 8 AM.

FriSat

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

What is measuring near here

The 6 instruments nearest Emmaus, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.5 miles away.

measured now4 instruments

AllentownXLL

At an airfield/2.4 mi away/400 ft/31 ft below here

temp, wind, gust, visibility, precip, pressure

Rank238of 1,383

measured daily2 instruments

Emmaus 0.5 WSWPA-LH-33

In a volunteer observer's own ground/0.5 mi away/401 ft/30 ft below here

precip, snowfall, snow depth

Rank-

PalmPLMP1

At a cooperative observer's station/10.5 mi away/289 ft/142 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Allentown, drawn

The nearest airport reporting now, 2.4 mi from Emmaus, Pennsylvania. From its report of Oct 15, 2026, 11:15 PM local time: 3 of its 6 sheets.

The sky

Overcast at 4,100 ft; the ceiling is 4,100 ft; visibility 10 mi or more.

Section of the sky over Allentown, height above the station to scale: overcast cloud with its base at 4,100 feet, the ceiling at 4,100 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT XLLFIG. A THE SKY OVER ALLENTOWNSECTION, 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 STATION01,0002,0003,0004,0005,0006,0007,000ETAGESLOWMIDDLETHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETOVC 4,100 FTOVERCAST, 8 EIGHTHS OF THE SKYCEILING 4,100 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEAllentown, the skySTATION REPORT · ASOS XLLTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-XLL-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 50.0 F, 72 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 4,100 ft.

Chart of the air at Allentown: temperature 59.0 degrees Fahrenheit and dew point 50.0, 72 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 4,100 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT XLLFIG. B THE AIR AT ALLENTOWNTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,0005,0006,00040 F50 F60 F70 FSATURATES 2,100 FT ABOVE THE STATION, AT 48.0 FLOWEST CLOUD REPORTED, OVC 4,100 FTTEMPERATURE 59.0 FDEW POINT 50.0 FSPREAD 9.0 FRELATIVE HUMIDITY 72 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 POINTTITLEAllentown, the airSTATION REPORT · ASOS XLLTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-XLL-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

Calm.

Plan of the wind at Allentown, 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 XLLFIG. C THE WIND AT ALLENTOWNPLAN, 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 FORCE73TITLEAllentown, the windSTATION REPORT · ASOS XLLTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-XLL-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Allentown, 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 Emmaus

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

Near Emmaus

River and lake gauges