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Gann Valley, South Dakota

Community in Buffalo County, South Dakota

Air quality

The air at Gann Valley

Index 26, good, led by fine particles. Read at 3 AM from its reporting area, Pierre (SD), 69 miles off.

26Good
  • Fine particles (PM2.5)26Good-

The days ahead

Yesterday measured 27, good.

Smoke, the next 40 hours

No smoke near the ground through Sat 7 PM.

FriSat

Precipitation

What has fallen at Gann Valley

0.31 in in the last 24 hours, 0.42 in over the last 3 days, to Fri 3 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.31in
Last 3 days
0.42in

Visibility

How far you can see at Gann Valley, the next 40 hours

Visibility stays 6 miles or more through Sat 7 PM, lowest 6 miles Fri 5 AM.

FriSat

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

What is measuring near here

The 5 instruments nearest Gann Valley, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 3.1 miles away.

measured now3 instruments

Huron RAWSRHUS2

A remote fire weather station/17.9 mi away/1,900 ft/183 ft above here

temp, wind, gust, humidity, pressure

Rank133of 806

Chamberlain9V9

At an airfield/24.7 mi away/1,672 ft/45 ft below here

temp, wind, gust, visibility, precip, pressure

Rank117of 806

measured daily2 instruments

Gann Valley 3NNEGNVS2

At a cooperative observer's station/3.2 mi away/1,647 ft/70 ft below here

snowfall, snow depth, precip, high, low

Rank440of 806

Gann Valley 10.3 NSD-BF-2

In a volunteer observer's own ground/10.1 mi away/1,888 ft/171 ft above here

precip, snowfall, snow depth

Rank-

Station report

The weather at Chamberlain, drawn

The nearest airport reporting now, 24.7 mi from Gann Valley, South Dakota. From its report of Oct 16, 2026, 3:35 AM local time: 3 of its 6 sheets.

The sky

Scattered at 2,700 ft, scattered at 3,500 ft, overcast at 4,900 ft; the ceiling is 4,900 ft; visibility 10 mi or more.

Section of the sky over Chamberlain, height above the station to scale: scattered cloud with its base at 2,700 feet, scattered cloud with its base at 3,500 feet, overcast cloud with its base at 4,900 feet, the ceiling at 4,900 feet, 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 STATION01,0002,0003,0004,0005,0006,0007,0008,000ETAGESLOWMIDDLETHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETOVC 4,900 FTOVERCAST, 8 EIGHTHS OF THE SKYSCT 3,500 FTSCATTERED, 3 TO 4 EIGHTHS OF THE SKYSCT 2,700 FTSCATTERED, 3 TO 4 EIGHTHS OF THE SKYCEILING 4,900 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, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

44.0 F with a dew point of 35.6 F, 72 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,900 ft up; the lowest cloud reported is at 2,700 ft.

Chart of the air at Chamberlain: temperature 44.0 degrees Fahrenheit and dew point 35.6, 72 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,900 feet above the station, against the lowest cloud reported at 2,700 feet; 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 STATION01,0002,0003,0004,00020 F30 F40 F50 FSATURATES 1,900 FT ABOVE THE STATION, AT 33.8 FLOWEST CLOUD REPORTED, SCT 2,700 FTTEMPERATURE 44.0 FDEW POINT 35.6 FSPREAD 8.4 FRELATIVE HUMIDITY 72 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 18 mph, gusting 30 mph: force 4, a moderate 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 18 miles an hour, gusting 30; beside it the Beaufort scale from calm to hurricane force, force 4, moderate 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 BREEZE84MODERATE BREEZE13NOW, 18 MPH5FRESH BREEZE196STRONG BREEZE25GUST, 30 MPH7NEAR 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

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Snow on the ground

Elsewhere in South Dakota

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

Near Gann Valley

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

Near Gann Valley

River and lake gauges