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Arnold, Maryland

Community in Anne Arundel County, Maryland

Air quality

The air at Arnold

Index 20, good, led by ozone. Read at 1 AM from its reporting area, Metro Baltimore (MD), 11 miles off.

20Good
  • Fine particles (PM2.5)12Good20.2 mi
  • Ozone20Good17 ppb18 mi
  • Nitrogen dioxide4Good4.2 ppb18 mi
  • Sulfur dioxide0Good0.1 ppb18 mi
  • Carbon monoxide-0.1 ppm20.2 mi

The days ahead

Good each day through Wed Oct 21, led by fine particles. Yesterday measured 25, good.

Smoke, the next 43 hours

No smoke near the ground through Sun 8 PM.

SatSun

Precipitation

What has fallen at Arnold

0.38 in in the last 24 hours, 0.43 in over the last 3 days, to Sat 1 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.38in
Last 3 days
0.43in

Visibility

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

Mist or haze: visibility falls to 3 miles Sat 5 AM.

SatSun

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

What is measuring near here

The 7 instruments nearest Arnold, 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

AnnapolisNAK

At an airfield/4.0 mi away/4 ft/59 ft below here

temp, wind, gust, visibility, precip, pressure

Rank1of 742

AnnapolisNDBC-APAM2

At a river or reservoir gauge/4.6 mi away/-/- ft from here

temp, wind, gust, humidity, pressure

Rank654of 742

Powder MillS2049

At a soil climate station/19.2 mi away/105 ft/42 ft above here

temp, humidity, soil temp, soil moisture

Rank726of 742

measured daily2 instruments

Arnold 0.7 NNWMD-AA-58

In a volunteer observer's own ground/0.6 mi away/62 ft/1 ft below here

precip, snowfall, snow depth

Rank-

StevensvilleSTVM2

At a cooperative observer's station/9.9 mi away/-20 ft/83 ft below here

snowfall, snow depth, precip, high, low

Rank391of 742

Station report

The weather at Annapolis, drawn

The nearest airport reporting now, 4.0 mi from Arnold, Maryland. From its report of Oct 17, 2026, 1:54 AM local time: 3 of its 6 sheets.

The sky

Broken at 5,000 ft, overcast at 9,500 ft; the ceiling is 5,000 ft; visibility 9 mi.

Section of the sky over Annapolis, height above the station to scale: broken cloud with its base at 5,000 feet, overcast cloud with its base at 9,500 feet, the ceiling at 5,000 feet, and visibility of 9 mi.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT NAKFIG. A THE SKY OVER ANNAPOLISSECTION, 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 STATION02,5005,0007,50010,00012,50015,000ETAGESLOWMIDDLETHE STATIONTHE CEILOMETER READS TO 12,000 FTOVC 9,500 FTOVERCAST, 8 EIGHTHS OF THE SKYBKN 5,000 FTBROKEN, 5 TO 7 EIGHTHS OF THE SKYCEILING 5,000 FTVISIBILITY, MILES: 9 MI0510TITLEAnnapolis, the skySTATION REPORT · ASOS NAKTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-17IDSR-NAK-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018, FB-SKY-013, FB-SKY-014

The air

60.0 F with a dew point of 56.0 F, 87 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 900 ft up; the lowest cloud reported is at 5,000 ft.

Chart of the air at Annapolis: temperature 60.0 degrees Fahrenheit and dew point 56.0, 87 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 900 feet above the station, against the lowest cloud reported at 5,000 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT NAKFIG. B THE AIR AT ANNAPOLISTHE 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 900 FT ABOVE THE STATION, AT 55.0 FLOWEST CLOUD REPORTED, BKN 5,000 FTTEMPERATURE 60.0 FDEW POINT 56.0 FSPREAD 4.0 FRELATIVE HUMIDITY 87 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 POINTTITLEAnnapolis, the airSTATION REPORT · ASOS NAKTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-17IDSR-NAK-2DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the west northwest (300 degrees) at 8 mph: force 3, a gentle breeze on the Beaufort scale.

Plan of the wind at Annapolis, north up: blowing from 300 degrees, the west northwest, at 8 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 NAKFIG. C THE WIND AT ANNAPOLISPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 300°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE8NOW, 8 MPH4MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEAnnapolis, the windSTATION REPORT · ASOS NAKTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-17IDSR-NAK-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

-

Snow on the ground

Elsewhere in Maryland

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

Near Arnold

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

Near Arnold

River and lake gauges