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Hecla, South Dakota

City in Brown County, South Dakota

Air quality

The air at Hecla

Index 9, good, led by fine particles. Read at 4 AM from its reporting area, Aberdeen (SD), 33 miles off.

9Good
  • Fine particles (PM2.5)9Good-
  • Coarse particles (PM10)6Good-

The days ahead

Yesterday measured 18, good.

Smoke, the next 46 hours

No smoke near the ground through Sun 1 AM.

FriSat

Precipitation

What has fallen at Hecla

0.16 in in the last 24 hours, 0.21 in over the last 3 days, to Fri 3 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.16in
Last 3 days
0.21in

Visibility

How far you can see at Hecla, the next 46 hours

Visibility stays 10 miles or more through Sun 1 AM.

FriSat

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

What is measuring near here

The 6 instruments nearest Hecla, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 7.1 miles away.

measured now4 instruments

BrittonBTN

At an airfield/20.2 mi away/1,305 ft/4 ft above here

temp, wind, gust, visibility, precip, pressure

Rank697of 806

measured daily2 instruments

Hecla 7.1 WNWSD-BR-4

In a volunteer observer's own ground/7.1 mi away/1,353 ft/52 ft above here

precip, snowfall, snow depth

Rank-

Britton 9 NWBRTS2

At a cooperative observer's station/10.5 mi away/1,325 ft/24 ft above here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Britton, drawn

The nearest airport reporting now, 20.2 mi from Hecla, South Dakota. From its report of Oct 16, 2026, 4:15 AM 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 6DATE2026-10-16IDSR-BTN-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

39.2 F with a dew point of 35.6 F, 87 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 800 ft up.

Chart of the air at Britton: temperature 39.2 degrees Fahrenheit and dew point 35.6, 87 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 800 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 STATION01,0002,0003,00020 F30 F40 F50 FSATURATES 800 FT ABOVE THE STATION, AT 34.8 FTEMPERATURE 39.2 FDEW POINT 35.6 FSPREAD 3.6 FRELATIVE HUMIDITY 87 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 6DATE2026-10-16IDSR-BTN-2DRAWN 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 18 mph, gusting 25 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 340 degrees, the north northwest, at 18 miles an hour, gusting 25; 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 340°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE13NOW, 18 MPH5FRESH BREEZE196STRONG BREEZE25GUST, 25 MPH7NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEBritton, the windSTATION REPORT · ASOS BTNTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-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

0in

Snow on the ground

Measured at Britton 9 NW (BRTS2), 10.5 miles from here, read 15 Oct, 07:00. measured daily

Elsewhere in South Dakota

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

Near Hecla

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

Near Hecla

River and lake gauges