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Clear Lake, South Dakota

Community in Marshall County, South Dakota

Air quality

The air at Clear Lake

Index 18, good, led by ozone. Read at 2 AM from its reporting area, Watertown (SD), 55 miles off.

18Good
  • Fine particles (PM2.5)12Good-
  • Ozone18Good-
  • Coarse particles (PM10)8Good-

The days ahead

Yesterday measured 28, good.

Smoke, the next 41 hours

No smoke near the ground through Sat 7 PM.

FriSat

Precipitation

What has fallen at Clear Lake

0.20 in in the last 24 hours, and none in the 2 days before, to Fri 2 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.20in
Last 3 days
0.20in

Visibility

How far you can see at Clear Lake, the next 41 hours

Visibility stays 9 miles or more through Sat 7 PM, lowest 10 miles Fri 3 AM.

FriSat

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

What is measuring near here

The 5 instruments nearest Clear Lake, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 4.6 miles away.

measured now3 instruments

Sisseton8D3

At an airfield/17.1 mi away/1,154 ft/675 ft below here

temp, wind, gust, visibility, precip, pressure

Rank122of 806

measured daily2 instruments

Lake City 3.7 SWSD-MR-17

In a volunteer observer's own ground/5.5 mi away/1,812 ft/17 ft below here

precip, snowfall, snow depth

Rank-

Obs Roy Lake Recreation AreaROYS2

At a cooperative observer's station/5.5 mi away/1,798 ft/31 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Sisseton, drawn

The nearest airport reporting now, 17.1 mi from Clear Lake, South Dakota. From its report of Oct 16, 2026, 2:56 AM local time: 3 of its 5 sheets.

The air

43.0 F with a dew point of 37.0 F, 79 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,400 ft up.

Chart of the air at Sisseton: temperature 43.0 degrees Fahrenheit and dew point 37.0, 79 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,400 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT 8D3FIG. B THE AIR AT SISSETONTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00020 F30 F40 F50 FSATURATES 1,400 FT ABOVE THE STATION, AT 35.7 FTEMPERATURE 43.0 FDEW POINT 37.0 FSPREAD 6.0 FRELATIVE HUMIDITY 79 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 POINTTITLESisseton, the airSTATION REPORT · ASOS 8D3TYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 5DATE2026-10-16IDSR-8D3-1DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the north northwest (340 degrees) at 26 mph, gusting 41 mph: force 6, a strong breeze on the Beaufort scale. The strongest gust today was 49 mph.

Plan of the wind at Sisseton, north up: blowing from 340 degrees, the north northwest, at 26 miles an hour, gusting 41; beside it the Beaufort scale from calm to hurricane force, force 6, strong breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT 8D3FIG. C THE WIND AT SISSETONPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 340°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE25NOW, 26 MPH7NEAR GALE328GALE39GUST, 41 MPH9STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLESisseton, the windSTATION REPORT · ASOS 8D3TYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 2 of 5DATE2026-10-16IDSR-8D3-2DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The column

At 1,154 ft above sea level, 4 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 28.69 inHg and the temperature at 54.9 F; the station's altimeter setting of 30.34 inHg means its barometer reads 29.10 inHg; it reports 43.0 F, 11.9 F colder than standard.

Section from sea level of where Sisseton stands in the atmosphere, height to scale: the station 1,154 feet above sea level with 4 per cent of the air below it; the standard atmosphere's pressure there, 28.69 inches of mercury, and temperature, 54.9 degrees Fahrenheit; the altimeter setting of 30.34 and the station pressure it means, 29.10.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT 8D3FIG. D WHERE SISSETON STANDS IN THE ATMOSPHERESECTION FROM SEA LEVEL, HEIGHT TO SCALE, THE STATION IN THE STANDARD ATMOSPHEREFT ABOVE SEA LEVEL05,00010,00015,000SEA LEVEL, 29.92 inHg IN THE STANDARD ATMOSPHERESISSETON4 PER CENT OF THE AIR BELOW IT1,154 FT10 PER CENT OF THE AIR BELOW, 2,890 FT20 PER CENT OF THE AIR BELOW, 6,050 FT30 PER CENT OF THE AIR BELOW, 9,540 FT40 PER CENT OF THE AIR BELOW, 13,470 FTSTANDARD PRESSURE HERE28.69 inHgSTANDARD TEMPERATURE HERE54.9 FALTIMETER SETTING, REPORTED30.34 inHgITS BAROMETER READS29.10 inHgTEMPERATURE, REPORTED43.0 FTITLESisseton, the columnSTATION REPORT · ASOS 8D3TYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 3 of 5DATE2026-10-16IDSR-8D3-3DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

The full report of Sisseton, in 5 sheets, each beside the Field Book plates that explain it

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Snow on the ground

Elsewhere in South Dakota

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

Near Clear Lake

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

Near Clear Lake

River and lake gauges