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Letcher, South Dakota

Town in Sanborn County, South Dakota

Air quality

The air at Letcher

Index 26, good, led by fine particles. Read at 3 AM from its reporting area, Brookings (SD), 73 miles off.

26Good
  • Fine particles (PM2.5)26Good-
  • Ozone17Good-
  • Coarse particles (PM10)7Good-

The days ahead

Yesterday measured 32, good.

Smoke, the next 40 hours

No smoke near the ground through Sat 7 PM.

FriSat

Precipitation

What has fallen at Letcher

0.07 in in the last 24 hours, 0.11 in over the last 3 days, to Fri 3 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.07in
Last 3 days
0.11in

Visibility

How far you can see at Letcher, the next 40 hours

Visibility stays 10 miles or more through Sat 7 PM.

FriSat

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

What is measuring near here

The 6 instruments nearest Letcher, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.4 miles away.

measured now4 instruments

MitchellMHE

At an airfield/9.9 mi away/1,298 ft/5 ft below here

temp, wind, gust, visibility, precip, pressure

Rank142of 806

Huron RAWSRHUS2

A remote fire weather station/39.2 mi away/1,900 ft/597 ft above here

temp, wind, gust, humidity, pressure

Rank133of 806

measured daily2 instruments

Letcher 0.5 ESD-SB-4

In a volunteer observer's own ground/0.4 mi away/1,301 ft/2 ft below here

precip, snowfall, snow depth

Rank432of 806

Forestburg 3 NEFTBS2

At a cooperative observer's station/10.4 mi away/1,227 ft/76 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Mitchell, drawn

The nearest airport reporting now, 9.9 mi from Letcher, South Dakota. From its report of Oct 16, 2026, 3:53 AM local time: 3 of its 6 sheets.

The sky

A few clouds at 2,900 ft; visibility 10 mi or more.

Section of the sky over Mitchell, height above the station to scale: a few clouds cloud with its base at 2,900 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MHEFIG. A THE SKY OVER MITCHELLSECTION, 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 STATION01,0002,0003,0004,0005,000ETAGESLOWTHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETFEW 2,900 FTA FEW CLOUDS, 1 TO 2 EIGHTHS OF THE SKYVISIBILITY, MILES: 10 MI OR MORE0510TITLEMitchell, the skySTATION REPORT · ASOS MHETYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-MHE-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 36.0 F, 73 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 1,800 ft up; the lowest cloud reported is at 2,900 ft.

Chart of the air at Mitchell: temperature 44.0 degrees Fahrenheit and dew point 36.0, 73 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 1,800 feet above the station, against the lowest cloud reported at 2,900 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MHEFIG. B THE AIR AT MITCHELLTHE 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 1,800 FT ABOVE THE STATION, AT 34.3 FLOWEST CLOUD REPORTED, FEW 2,900 FTTEMPERATURE 44.0 FDEW POINT 36.0 FSPREAD 8.0 FRELATIVE HUMIDITY 73 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 POINTTITLEMitchell, the airSTATION REPORT · ASOS MHETYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-MHE-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the north northwest (340 degrees) at 24 mph, gusting 40 mph: force 5, a fresh breeze on the Beaufort scale. The strongest gust today was 51 mph.

Plan of the wind at Mitchell, north up: blowing from 340 degrees, the north northwest, at 24 miles an hour, gusting 40; beside it the Beaufort scale from calm to hurricane force, force 5, fresh breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MHEFIG. C THE WIND AT MITCHELLPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 340°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE19NOW, 24 MPH6STRONG BREEZE257NEAR GALE328GALE39GUST, 40 MPH9STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEMitchell, the windSTATION REPORT · ASOS MHETYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-MHE-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Mitchell, 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 Letcher

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

Near Letcher

River and lake gauges