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Alcester, South Dakota

City in Union County, South Dakota

Air quality

The air at Alcester

Index 22, good, led by ozone. Read at 12 AM from its reporting area, Vermillion (SD), 22 miles off.

22Good
  • Fine particles (PM2.5)14Good-
  • Ozone22Good-

The days ahead

Yesterday measured 24, good.

Smoke, the next 43 hours

No smoke near the ground through Sat 7 PM.

FriSat

Precipitation

What has fallen at Alcester

0.63 in in the last 24 hours, 0.70 in over the last 3 days, to Fri 12 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.63in
Last 3 days
0.70in

Visibility

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

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

FriSat

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

What is measuring near here

The 5 instruments nearest Alcester, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 5.3 miles away.

measured now3 instruments

VermillionVMR

At an airfield/23.6 mi away/1,145 ft/233 ft below here

temp, wind, gust, visibility, precip, pressure

Rank415of 806

measured daily2 instruments

Hudson 6.6 WSWSD-LN-25

In a volunteer observer's own ground/5.3 mi away/1,445 ft/67 ft above here

precip, snowfall, snow depth

Rank-

CentervilleCENS2

At a cooperative observer's station/14.0 mi away/1,276 ft/102 ft below here

snowfall, snow depth, precip, high, low

Rank661of 806

Station report

The weather at Vermillion, drawn

The nearest airport reporting now, 23.6 mi from Alcester, South Dakota. From its report of Oct 16, 2026, 12:35 AM local time: 3 of its 6 sheets.

The sky

Overcast at 3,400 ft; the ceiling is 3,400 ft; visibility 10 mi or more.

Section of the sky over Vermillion, height above the station to scale: overcast cloud with its base at 3,400 feet, the ceiling at 3,400 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT VMRFIG. A THE SKY OVER VERMILLIONSECTION, 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 STATION01,0002,0003,0004,0005,0006,000ETAGESLOWTHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETOVC 3,400 FTOVERCAST, 8 EIGHTHS OF THE SKYCEILING 3,400 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLEVermillion, the skySTATION REPORT · ASOS VMRTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-VMR-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

48.2 F with a dew point of 39.2 F, 71 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 2,100 ft up; the lowest cloud reported is at 3,400 ft.

Chart of the air at Vermillion: temperature 48.2 degrees Fahrenheit and dew point 39.2, 71 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 2,100 feet above the station, against the lowest cloud reported at 3,400 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT VMRFIG. B THE AIR AT VERMILLIONTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,0005,00030 F40 F50 F60 FSATURATES 2,100 FT ABOVE THE STATION, AT 37.2 FLOWEST CLOUD REPORTED, OVC 3,400 FTTEMPERATURE 48.2 FDEW POINT 39.2 FSPREAD 9.0 FRELATIVE HUMIDITY 71 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 POINTTITLEVermillion, the airSTATION REPORT · ASOS VMRTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-VMR-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the northwest (310 degrees) at 23 mph, gusting 31 mph: force 5, a fresh breeze on the Beaufort scale. The strongest gust today was 32 mph.

Plan of the wind at Vermillion, north up: blowing from 310 degrees, the northwest, at 23 miles an hour, gusting 31; beside it the Beaufort scale from calm to hurricane force, force 5, fresh breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT VMRFIG. C THE WIND AT VERMILLIONPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 310°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE19NOW, 23 MPH6STRONG BREEZE25GUST, 31 MPH7NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEVermillion, the windSTATION REPORT · ASOS VMRTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-VMR-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Vermillion, 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 Alcester

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

Near Alcester

River and lake gauges