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Jarrettsville, Maryland

Community in Harford County, Maryland

Air quality

The air at Jarrettsville

Index 36, good, led by fine particles. Read at 4 AM from its reporting area, Susquehanna Valley (PA), 25 miles off.

36Good
  • Fine particles (PM2.5)36Good16.1 mi
  • Ozone18Good19 ppb14.4 mi
  • Nitrogen dioxide4Good4.1 ppb20 mi
  • Sulfur dioxide0Good0 ppb20 mi

The days ahead

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

Smoke, the next 40 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 Jarrettsville

0.01 in in the last 24 hours, 0.06 in over the last 3 days, to Fri 4 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.01in
Last 3 days
0.06in

Visibility

How far you can see at Jarrettsville, the next 40 hours

Dense fog: visibility falls to 0.1 miles Fri 8 AM, under a mile for 1 hour.

FriSat

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

What is measuring near here

The 6 instruments nearest Jarrettsville, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.8 miles away.

measured now4 instruments

Churchville0W3

At an airfield/14.5 mi away/394 ft/204 ft below here

temp, wind, gust, visibility, precip, pressure

Rank86of 736

measured daily2 instruments

ConowingoCNWM2

At a cooperative observer's station/16.6 mi away/23 ft/575 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Churchville, drawn

The nearest airport reporting now, 14.5 mi from Jarrettsville, Maryland. From its report of Oct 16, 2026, 4:55 AM local time: 3 of its 6 sheets.

The sky

Overcast at 200 ft; the ceiling is 200 ft; visibility 6 mi.

Section of the sky over Churchville, height above the station to scale: overcast cloud with its base at 200 feet, the ceiling at 200 feet, and visibility of 6 mi.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT 0W3FIG. A THE SKY OVER CHURCHVILLESECTION, 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 200 FTOVERCAST, 8 EIGHTHS OF THE SKYCEILING 200 FTVISIBILITY, MILES: 6 MI0510TITLEChurchville, the skySTATION REPORT · ASOS 0W3TYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-0W3-1DRAWN 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 59.0 F, 100 per cent relative humidity. The air is saturated at the ground; the lowest cloud reported is at 200 ft.

Chart of the air at Churchville: temperature 59.0 degrees Fahrenheit and dew point 59.0, 100 per cent relative humidity; the air saturated at the ground, against the lowest cloud reported at 200 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT 0W3FIG. B THE AIR AT CHURCHVILLETHE 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 FSATURATED AT THE GROUNDLOWEST CLOUD REPORTED, OVC 200 FTTEMPERATURE AND DEW POINT 59.0 F, 59.0 FRELATIVE HUMIDITY 100 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 POINTTITLEChurchville, the airSTATION REPORT · ASOS 0W3TYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-0W3-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the south southeast (160 degrees) at 9 mph: force 3, a gentle breeze on the Beaufort scale.

Plan of the wind at Churchville, north up: blowing from 160 degrees, the south southeast, 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 0W3FIG. C THE WIND AT CHURCHVILLEPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 160°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE8NOW, 9 MPH4MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEChurchville, the windSTATION REPORT · ASOS 0W3TYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-0W3-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Churchville, 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 Jarrettsville

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

Near Jarrettsville

River and lake gauges