Storm Station
Sign in

Grenville, South Dakota

Town in Day County, South Dakota

Air quality

The air at Grenville

Index 29, good, led by fine particles. Read at 12 AM from its reporting area, Watertown (SD), 41 miles off.

29Good
  • Fine particles (PM2.5)29Good-
  • Ozone17Good-
  • Coarse particles (PM10)15Good-

The days ahead

Yesterday measured 21, good.

Smoke, the next 43 hours

No smoke near the ground through Sat 7 PM.

FriSat

Precipitation

What has fallen at Grenville

0.22 in in the last 24 hours, and none in the 2 days before, to Fri 12 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.22in
Last 3 days
0.22in

Visibility

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

Visibility stays 9 miles or more through Sat 7 PM, lowest 10 miles Fri 1 AM.

FriSat

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

What is measuring near here

The 6 instruments nearest Grenville, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.2 miles away.

measured now4 instruments

SD RWIS WaubaySD079

Beside a road/8.8 mi away/1,814 ft/51 ft below here

temp, pavement temp, wind, visibility, precip

Rank-

Sisseton8D3

At an airfield/23.9 mi away/1,154 ft/711 ft below here

temp, wind, gust, visibility, precip, pressure

Rank122of 806

measured daily2 instruments

Grenville 0.1 WSWSD-DY-20

In a volunteer observer's own ground/0.2 mi away/1,860 ft/5 ft below here

precip, snowfall, snow depth

Rank-

National Wildlife RefugeWNRS2

In a park or preserve/3.7 mi away/1,801 ft/64 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Sisseton, drawn

The nearest airport reporting now, 23.9 mi from Grenville, South Dakota. From its report of Oct 15, 2026, 11:56 PM local time: 3 of its 5 sheets.

The air

44.0 F with a dew point of 40.0 F, 86 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 900 ft up.

Chart of the air at Sisseton: temperature 44.0 degrees Fahrenheit and dew point 40.0, 86 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; 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 STATION01,0002,0003,00030 F40 F50 FSATURATES 900 FT ABOVE THE STATION, AT 39.1 FTEMPERATURE 44.0 FDEW POINT 40.0 FSPREAD 4.0 FRELATIVE HUMIDITY 86 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-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the north northwest (340 degrees) at 30 mph, gusting 45 mph: force 6, a strong breeze on the Beaufort scale. The strongest gust today was 46 mph.

Plan of the wind at Sisseton, north up: blowing from 340 degrees, the north northwest, at 30 miles an hour, gusting 45; 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, 30 MPH7NEAR GALE328GALE39GUST, 45 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 30.21 inHg means its barometer reads 28.97 inHg; it reports 44.0 F, 10.9 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 30.21 and the station pressure it means, 28.97.1122334455667788AABBCCDDEE© 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, REPORTED30.21 inHgITS BAROMETER READS28.97 inHgTEMPERATURE, REPORTED44.0 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

-

Snow on the ground

Elsewhere in South Dakota

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

Near Grenville

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

Near Grenville

River and lake gauges