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Stephan, South Dakota

Community in Hyde County, South Dakota

Air quality

The air at Stephan

Index 2, good, led by fine particles. Read at 1 PM from its reporting area, Pierre (SD), 42 miles off.

2Good
  • Fine particles (PM2.5)2Good-

The days ahead

Yesterday measured 27, good.

Smoke, the next 43 hours

No smoke near the ground through Sun 7 AM.

FriSatSun

Precipitation

What has fallen at Stephan

None in the last 24 hours; 0.24 in over the last 3 days, to Fri 12 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.00in
Last 3 days
0.24in

Visibility

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

Visibility stays 10 miles or more through Sun 7 AM.

FriSatSun

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

What is measuring near here

The 5 instruments nearest Stephan, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.0 miles away.

measured now3 instruments

SD RWIS Mac's CornerSD041

Beside a road/1.0 mi away/1,867 ft/27 ft above here

temp, pavement temp, wind, visibility, precip

Rank-

Chamberlain9V9

At an airfield/33.9 mi away/1,672 ft/168 ft below here

temp, wind, gust, visibility, precip, pressure

Rank117of 806

measured daily2 instruments

Highmore 17.6 SSD-HY-12

In a volunteer observer's own ground/1.5 mi away/1,885 ft/45 ft above here

precip, snowfall, snow depth

Rank-

HighmoreHMRS2

At a cooperative observer's station/18.4 mi away/1,900 ft/60 ft above here

snowfall, snow depth, precip, high, low

Rank97of 806

Station report

The weather at Chamberlain, drawn

The nearest airport reporting now, 33.9 mi from Stephan, South Dakota. From its report of Oct 16, 2026, 1:15 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 Chamberlain, 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 9V9FIG. A THE SKY OVER CHAMBERLAINSECTION, 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 MORE0510TITLEChamberlain, the skySTATION REPORT · ASOS 9V9TYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-9V9-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

49.0 F with a dew point of 32.4 F, 53 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 3,800 ft up.

Chart of the air at Chamberlain: temperature 49.0 degrees Fahrenheit and dew point 32.4, 53 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 3,800 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT 9V9FIG. B THE AIR AT CHAMBERLAINTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,0005,00020 F30 F40 F50 F60 FSATURATES 3,800 FT ABOVE THE STATION, AT 28.9 FTEMPERATURE 49.0 FDEW POINT 32.4 FSPREAD 16.6 FRELATIVE HUMIDITY 53 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 POINTTITLEChamberlain, the airSTATION REPORT · ASOS 9V9TYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-9V9-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the north northwest (340 degrees) at 9 mph: force 3, a gentle breeze on the Beaufort scale. The strongest gust today was 44 mph.

Plan of the wind at Chamberlain, north up: blowing from 340 degrees, the north northwest, 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 9V9FIG. C THE WIND AT CHAMBERLAINPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 340°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE8NOW, 9 MPH4MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEChamberlain, the windSTATION REPORT · ASOS 9V9TYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-9V9-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Chamberlain, 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 Stephan

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

Near Stephan

River and lake gauges