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Severn, Maryland

Community in Anne Arundel County, Maryland

Air quality

The air at Severn

Index 17, good, led by ozone. Read at 4 AM from its reporting area, Metro Baltimore (MD), 8 miles off.

17Good
  • Fine particles (PM2.5)2Good20.9 mi
  • Ozone17Good10 ppb10.4 mi
  • Nitrogen dioxide2Good2.3 ppb10.4 mi
  • Sulfur dioxide0Good0 ppb10.4 mi
  • Carbon monoxide-0.2 ppm7.4 mi

The days ahead

Good each day through Sun Oct 18, led by fine particles. Yesterday measured 20, good.

Smoke, the next 41 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 Severn

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

Last 24 hours
0.05in
Last 3 days
0.06in

Visibility

How far you can see at Severn, the next 41 hours

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

FriSat

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

What is measuring near here

The 7 instruments nearest Severn, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.7 miles away.

measured now5 instruments

Powder MillS2049

At a soil climate station/11.1 mi away/105 ft/86 ft below here

temp, humidity, soil temp, soil moisture

Rank734of 736

measured daily2 instruments

Severn 1.5 WMD-AA-99

In a volunteer observer's own ground/0.7 mi away/180 ft/11 ft below here

precip, snowfall, snow depth

Rank26of 736

Ferndale - BWI SnowBSPM2

At a cooperative observer's station/4.2 mi away/118 ft/73 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Baltimore - Wash Intl, drawn

The nearest airport reporting now, 3.0 mi from Severn, Maryland. From its report of Oct 16, 2026, 4:10 AM local time: 3 of its 6 sheets.

The sky

A few clouds at 700 ft, overcast at 1,400 ft; the ceiling is 1,400 ft; visibility 10 mi or more.

Section of the sky over Baltimore - Wash Intl, height above the station to scale: a few clouds cloud with its base at 700 feet, overcast cloud with its base at 1,400 feet, the ceiling at 1,400 feet, and visibility of 10 mi or more.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 1,400 FTOVERCAST, 8 EIGHTHS OF THE SKYFEW 700 FTA FEW CLOUDS, 1 TO 2 EIGHTHS OF THE SKYCEILING 1,400 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEBaltimore - 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 59.0 F, 96 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 200 ft up; the lowest cloud reported is at 700 ft.

Chart of the air at Baltimore - Wash Intl: temperature 60.0 degrees Fahrenheit and dew point 59.0, 96 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 200 feet above the station, against the lowest cloud reported at 700 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 200 FT ABOVE THE STATION, AT 58.7 FLOWEST CLOUD REPORTED, FEW 700 FTTEMPERATURE AND DEW POINT 60.0 F, 59.0 FRELATIVE HUMIDITY 96 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

Calm.

Plan of the wind at Baltimore - Wash Intl, 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 BWIFIG. C THE WIND AT BALTIMORE - WASH INTLPLAN, 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 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 Severn

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

Near Severn

River and lake gauges