Storm Station
Sign in

Roslyn, South Dakota

Town in Day County, South Dakota

Air quality

The air at Roslyn

Index 31, good, led by coarse particles. Read at 11 PM from its reporting area, Watertown (SD), 45 miles off.

31Good
  • Fine particles (PM2.5)25Good-
  • Ozone14Good-
  • Coarse particles (PM10)31Good-

The days ahead

Yesterday measured 28, good.

Smoke, the next 45 hours

No smoke near the ground through Sun 7 PM.

SatSun

Precipitation

What has fallen at Roslyn

0.05 in in the last 24 hours, 0.24 in over the last 3 days, to Fri 10 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.05in
Last 3 days
0.24in

Visibility

How far you can see at Roslyn, the next 45 hours

Visibility stays 10 miles or more through Sun 7 PM.

SatSun

On the radar over Roslyn, South DakotaReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 6 instruments nearest Roslyn, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.9 miles away.

measured now4 instruments

SD RWIS WaubaySD079

Beside a road/11.8 mi away/1,814 ft/48 ft below here

temp, pavement temp, wind, visibility, precip

Rank-

BrittonBTN

At an airfield/25.2 mi away/1,305 ft/557 ft below here

temp, wind, gust, visibility, precip, pressure

Rank392of 817

measured daily2 instruments

National Wildlife RefugeWNRS2

In a park or preserve/8.8 mi away/1,801 ft/61 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Britton, drawn

The nearest airport reporting now, 25.2 mi from Roslyn, South Dakota. From its report of Oct 16, 2026, 11:35 PM local time: 3 of its 6 sheets.

The sky

No cloud below 12,000 ft; visibility 10 mi or more.

Section of the sky over Britton, height above the station to scale: no cloud detected below 12,000 feet, the reach of its ceilometer, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT BTNFIG. A THE SKY OVER BRITTONSECTION, 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 SHEETNO CLOUD DETECTED BELOW 12,000 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEBritton, the skySTATION REPORT · ASOS BTNTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-17IDSR-BTN-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

39.2 F with a dew point of 28.4 F, 65 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 2,400 ft up.

Chart of the air at Britton: temperature 39.2 degrees Fahrenheit and dew point 28.4, 65 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 2,400 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT BTNFIG. B THE AIR AT BRITTONTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,00020 F30 F40 F50 FSATURATES 2,400 FT ABOVE THE STATION, AT 26.1 FTEMPERATURE 39.2 FDEW POINT 28.4 FSPREAD 10.8 FRELATIVE HUMIDITY 65 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 POINTTITLEBritton, the airSTATION REPORT · ASOS BTNTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-17IDSR-BTN-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the south (180 degrees) at 13 mph: force 4, a moderate breeze on the Beaufort scale. The strongest gust today was 38 mph.

Plan of the wind at Britton, north up: blowing from 180 degrees, the south, at 13 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 4, moderate breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT BTNFIG. C THE WIND AT BRITTONPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 180°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE13NOW, 13 MPH5FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEBritton, the windSTATION REPORT · ASOS BTNTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-17IDSR-BTN-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

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

-

Snow on the ground

Elsewhere in South Dakota

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

Near Roslyn

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

Near Roslyn

River and lake gauges