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Willow Lake, South Dakota

City in Clark County, South Dakota

Air quality

The air at Willow Lake

Index 23, good, led by ozone. Read at 11 AM from its reporting area, Watertown (SD), 31 miles off.

23Good
  • Fine particles (PM2.5)16Good-
  • Ozone23Good-
  • Coarse particles (PM10)6Good-

The days ahead

Yesterday measured 28, good.

Smoke, the next 45 hours

No smoke near the ground through Sun 7 AM.

FriSatSun

Precipitation

What has fallen at Willow Lake

0.19 in in the last 24 hours, 0.37 in over the last 3 days, to Fri 10 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.19in
Last 3 days
0.37in

Visibility

How far you can see at Willow Lake, the next 45 hours

Visibility stays 10 miles or more through Sun 7 AM.

FriSatSun

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

What is measuring near here

The 5 instruments nearest Willow Lake, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 5.0 miles away.

measured now3 instruments

Desmet6E5

At an airfield/14.0 mi away/1,726 ft/54 ft below here

temp, wind, gust, visibility, precip, pressure

Rank105of 806

measured daily2 instruments

Willow Lake 7.1 WSWSD-CK-13

In a volunteer observer's own ground/7.1 mi away/1,619 ft/161 ft below here

precip, snowfall, snow depth

Rank-

Brookings-38MI.NwBRYS2

At a cooperative observer's station/9.4 mi away/1,847 ft/67 ft above here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Desmet, drawn

The nearest airport reporting now, 14.0 mi from Willow Lake, South Dakota. From its report of Oct 16, 2026, 11:10 AM local time: 3 of its 6 sheets.

The sky

Scattered at 2,400 ft, scattered at 2,900 ft; visibility 10 mi or more.

Section of the sky over Desmet, height above the station to scale: scattered cloud with its base at 2,400 feet, scattered cloud with its base at 2,900 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT 6E5FIG. A THE SKY OVER DESMETSECTION, 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 SHEETSCT 2,900 FTSCATTERED, 3 TO 4 EIGHTHS OF THE SKYSCT 2,400 FTSCATTERED, 3 TO 4 EIGHTHS OF THE SKYVISIBILITY, MILES: 10 MI OR MORE0510TITLEDesmet, the skySTATION REPORT · ASOS 6E5TYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-6E5-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

42.8 F with a dew point of 26.6 F, 52 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 3,700 ft up; the lowest cloud reported is at 2,400 ft.

Chart of the air at Desmet: temperature 42.8 degrees Fahrenheit and dew point 26.6, 52 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 3,700 feet above the station, against the lowest cloud reported at 2,400 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT 6E5FIG. B THE AIR AT DESMETTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,0005,00010 F20 F30 F40 F50 FSATURATES 3,700 FT ABOVE THE STATION, AT 23.2 FLOWEST CLOUD REPORTED, SCT 2,400 FTTEMPERATURE 42.8 FDEW POINT 26.6 FSPREAD 16.2 FRELATIVE HUMIDITY 52 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 POINTTITLEDesmet, the airSTATION REPORT · ASOS 6E5TYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-6E5-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the north (350 degrees) at 20 mph, gusting 29 mph: force 5, a fresh breeze on the Beaufort scale. The strongest gust today was 43 mph.

Plan of the wind at Desmet, north up: blowing from 350 degrees, the north, at 20 miles an hour, gusting 29; beside it the Beaufort scale from calm to hurricane force, force 5, fresh breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT 6E5FIG. C THE WIND AT DESMETPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 350°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE19NOW, 20 MPH6STRONG BREEZE25GUST, 29 MPH7NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEDesmet, the windSTATION REPORT · ASOS 6E5TYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-6E5-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Desmet, 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 Willow Lake

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

Near Willow Lake

River and lake gauges