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Ellicott City, Maryland

Community in Howard County, Maryland

Air quality

The air at Ellicott City

Index 19, good, led by ozone. Read at 12 AM from its reporting area, Metro Baltimore (MD), 14 miles off.

19Good
  • Fine particles (PM2.5)0Good18.7 mi
  • Ozone19Good7 ppb15.7 mi
  • Nitrogen dioxide9Good10.1 ppb7.7 mi
  • Sulfur dioxide0Good0 ppb15.7 mi
  • Carbon monoxide-0.2 ppm9.5 mi

The days ahead

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

Smoke, the next 44 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 Ellicott City

0.08 in in the last 24 hours, 0.11 in over the last 3 days, to Fri 12 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.08in
Last 3 days
0.11in

Visibility

How far you can see at Ellicott City, the next 44 hours

Mist or haze: visibility falls to 1 miles Fri 7 AM.

FriSat

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

What is measuring near here

The 7 instruments nearest Ellicott City, 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 now5 instruments

BaltimoreNDBC-BLTM2

At a river or reservoir gauge/13.7 mi away/-/- ft from here

temp, wind, gust, humidity, pressure

Rank664of 736

Powder MillS2049

At a soil climate station/17.9 mi away/105 ft/271 ft below here

temp, humidity, soil temp, soil moisture

Rank734of 736

measured daily2 instruments

Ellicott City 1.3 WSWMD-HW-13

In a volunteer observer's own ground/1.4 mi away/413 ft/37 ft above here

precip, snowfall, snow depth

Rank-

CylburCYLM2

At a cooperative observer's station/11.1 mi away/295 ft/81 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Baltimore - Wash Intl, drawn

The nearest airport reporting now, 10.7 mi from Ellicott City, Maryland. From its report of Oct 16, 2026, 1:04 AM local time: 3 of its 6 sheets.

The sky

Overcast at 1,500 ft; the ceiling is 1,500 ft; visibility 4 mi.

Section of the sky over Baltimore - Wash Intl, height above the station to scale: overcast cloud with its base at 1,500 feet, the ceiling at 1,500 feet, and visibility of 4 mi.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT BWIFIG. A THE SKY OVER BALTIMORE - WASH INTLSECTION, 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 1,500 FTOVERCAST, 8 EIGHTHS OF THE SKYCEILING 1,500 FTVISIBILITY, MILES: 4 MI0510TITLEBaltimore - Wash Intl, the skySTATION REPORT · ASOS BWITYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-BWI-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

60.0 F with a dew point of 58.0 F, 93 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 500 ft up; the lowest cloud reported is at 1,500 ft.

Chart of the air at Baltimore - Wash Intl: temperature 60.0 degrees Fahrenheit and dew point 58.0, 93 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 500 feet above the station, against the lowest cloud reported at 1,500 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT BWIFIG. B THE AIR AT BALTIMORE - WASH INTLTHE 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 500 FT ABOVE THE STATION, AT 57.5 FLOWEST CLOUD REPORTED, OVC 1,500 FTTEMPERATURE AND DEW POINT 60.0 F, 58.0 FRELATIVE HUMIDITY 93 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 - Wash Intl, the airSTATION REPORT · ASOS BWITYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-BWI-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the south southeast (150 degrees) at 6 mph: force 2, a light breeze on the Beaufort scale.

Plan of the wind at Baltimore - Wash Intl, north up: blowing from 150 degrees, the south southeast, at 6 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 2, light breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT BWIFIG. C THE WIND AT BALTIMORE - WASH INTLPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 150°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE4NOW, 6 MPH3GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEBaltimore - Wash Intl, the windSTATION REPORT · ASOS BWITYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-BWI-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Baltimore - Wash Intl, 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 Ellicott City

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

Near Ellicott City

River and lake gauges