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Joppatowne, Maryland

Community in Harford County, Maryland

Air quality

The air at Joppatowne

Index 20, good, led by ozone. Read at 1 AM from its reporting area, Metro Baltimore (MD), 21 miles off.

20Good
  • Fine particles (PM2.5)0Good-
  • Ozone20Good22 ppb2.9 mi
  • Nitrogen dioxide2Good2.5 ppb10.1 mi
  • Sulfur dioxide0Good0.1 ppb10.1 mi

The days ahead

Good each day through Sun Oct 18, led by fine particles. Yesterday measured 10, 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 Joppatowne

0.04 in in the last 24 hours, 0.07 in over the last 3 days, to Fri 1 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.04in
Last 3 days
0.07in

Visibility

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

Visibility stays 5 miles or more through Sat 8 PM, lowest 6 miles Fri 7 PM.

FriSat

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

What is measuring near here

The 7 instruments nearest Joppatowne, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.0 miles away.

measured now5 instruments

Powder MillS2049

At a soil climate station/38.3 mi away/105 ft/64 ft above here

temp, humidity, soil temp, soil moisture

Rank734of 736

measured daily2 instruments

Joppatowne 0.9 SSWMD-HR-39

In a volunteer observer's own ground/1.0 mi away/12 ft/29 ft below here

precip, snowfall, snow depth

Rank-

CylburCYLM2

At a cooperative observer's station/16.5 mi away/295 ft/254 ft above here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Baltimore/Martin, drawn

The nearest airport reporting now, 7.1 mi from Joppatowne, Maryland. From its report of Oct 16, 2026, 1:35 AM local time: 3 of its 6 sheets.

The sky

Overcast at 1,200 ft; the ceiling is 1,200 ft; visibility 4 mi.

Section of the sky over Baltimore/Martin, height above the station to scale: overcast cloud with its base at 1,200 feet, the ceiling at 1,200 feet, and visibility of 4 mi.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 STATION05001,0001,5002,0002,5003,000ETAGESLOWTHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETOVC 1,200 FTOVERCAST, 8 EIGHTHS OF THE SKYCEILING 1,200 FTVISIBILITY, MILES: 4 MI0510TITLEBaltimore/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

61.7 F with a dew point of 58.5 F, 89 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 1,200 ft.

Chart of the air at Baltimore/Martin: temperature 61.7 degrees Fahrenheit and dew point 58.5, 89 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 1,200 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 STATION01,0002,0003,00050 F60 F70 FSATURATES 700 FT ABOVE THE STATION, AT 57.7 FLOWEST CLOUD REPORTED, OVC 1,200 FTTEMPERATURE 61.7 FDEW POINT 58.5 FSPREAD 3.2 FRELATIVE HUMIDITY 89 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-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the south (170 degrees) at 9 mph: force 3, a gentle breeze on the Beaufort scale.

Plan of the wind at Baltimore/Martin, north up: blowing from 170 degrees, the south, 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 MTNFIG. C THE WIND AT BALTIMORE/MARTINPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 170°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE8NOW, 9 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 Joppatowne

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

Near Joppatowne

River and lake gauges