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Perry Hall, Maryland

Community in Baltimore County, Maryland

Air quality

The air at Perry Hall

Index 18, good, led by ozone. Read at 11 PM from its reporting area, Metro Baltimore (MD), 16 miles off.

18Good
  • Fine particles (PM2.5)6Good9.2 mi
  • Ozone18Good21 ppb6.2 mi
  • Nitrogen dioxide3Good3.4 ppb6.2 mi
  • Sulfur dioxide0Good0.1 ppb6.2 mi

The days ahead

Good each day through Sun Oct 18, led by fine particles. Yesterday measured 52, moderate.

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 Perry Hall

0.09 in in the last 24 hours, and none in the 2 days before, to Thu 10 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.09in
Last 3 days
0.09in

Visibility

How far you can see at Perry Hall, the next 46 hours

Mist or haze: visibility falls to 3 miles Fri 8 AM.

FriSat

On the radar over Perry Hall, MarylandReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 7 instruments nearest Perry Hall, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.6 miles away.

measured now5 instruments

Powder MillS2049

At a soil climate station/33.1 mi away/105 ft/127 ft below here

temp, humidity, soil temp, soil moisture

Rank734of 736

measured daily2 instruments

CylburCYLM2

At a cooperative observer's station/9.6 mi away/295 ft/63 ft above here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Baltimore/Martin, drawn

The nearest airport reporting now, 6.5 mi from Perry Hall, Maryland. From its report of Oct 15, 2026, 11:15 PM local time: 3 of its 6 sheets.

The sky

Overcast at 3,300 ft; the ceiling is 3,300 ft; visibility 10 mi or more.

Section of the sky over Baltimore/Martin, height above the station to scale: overcast cloud with its base at 3,300 feet, the ceiling at 3,300 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MTNFIG. A THE SKY OVER BALTIMORE/MARTINSECTION, 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 STATION01,0002,0003,0004,0005,000ETAGESLOWTHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETOVC 3,300 FTOVERCAST, 8 EIGHTHS OF THE SKYCEILING 3,300 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEBaltimore/Martin, the skySTATION REPORT · ASOS MTNTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-MTN-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

62.6 F with a dew point of 55.8 F, 78 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,600 ft up; the lowest cloud reported is at 3,300 ft.

Chart of the air at Baltimore/Martin: temperature 62.6 degrees Fahrenheit and dew point 55.8, 78 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,600 feet above the station, against the lowest cloud reported at 3,300 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MTNFIG. B THE AIR AT BALTIMORE/MARTINTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,0005,00040 F50 F60 F70 FSATURATES 1,600 FT ABOVE THE STATION, AT 54.2 FLOWEST CLOUD REPORTED, OVC 3,300 FTTEMPERATURE 62.6 FDEW POINT 55.8 FSPREAD 6.8 FRELATIVE HUMIDITY 78 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 POINTTITLEBaltimore/Martin, the airSTATION REPORT · ASOS MTNTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-MTN-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the south southeast (150 degrees) at 10 mph: force 3, a gentle breeze on the Beaufort scale. The strongest gust today was 12 mph.

Plan of the wind at Baltimore/Martin, north up: blowing from 150 degrees, the south southeast, at 10 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 MTNFIG. C THE WIND AT BALTIMORE/MARTINPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 150°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE8NOW, 10 MPH4MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEBaltimore/Martin, the windSTATION REPORT · ASOS MTNTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-MTN-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

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Snow on the ground

Elsewhere in Maryland

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

Near Perry Hall

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

Near Perry Hall

River and lake gauges