Storm Station
Sign in

Oacoma, South Dakota

Town in Lyman County, South Dakota

Air quality

The air at Oacoma

Index 28, good, led by fine particles. Read at 10 PM from its reporting area, Pierre (SD), 60 miles off.

28Good
  • Fine particles (PM2.5)28Good-

The days ahead

Yesterday measured 37, good.

Smoke, the next 45 hours

No smoke near the ground through Sat 7 PM.

FriSat

Precipitation

What has fallen at Oacoma

0.37 in in the last 24 hours, and none in the 2 days before, to Thu 10 PM. Measured by radar and rain gauges, as water.

Last 24 hours
0.37in
Last 3 days
0.37in

Visibility

How far you can see at Oacoma, the next 45 hours

Visibility stays 10 miles or more through Sat 7 PM.

FriSat

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

What is measuring near here

The 5 instruments nearest Oacoma, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.3 miles away.

measured now3 instruments

Chamberlain9V9

At an airfield/4.4 mi away/1,672 ft/275 ft above here

temp, wind, gust, visibility, precip, pressure

Rank117of 806

SD RWIS RelianceSD059

Beside a road/9.2 mi away/1,821 ft/424 ft above here

temp, pavement temp, wind, visibility, precip

Rank-

measured daily2 instruments

Oacoma 0.8 WSD-LY-43

In a volunteer observer's own ground/0.3 mi away/1,402 ft/5 ft above here

precip, snowfall, snow depth

Rank-

Chamberlain 5 SCBRS2

At a cooperative observer's station/5.8 mi away/1,657 ft/260 ft above here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Chamberlain, drawn

The nearest airport reporting now, 4.4 mi from Oacoma, South Dakota. From its report of Oct 15, 2026, 11:15 PM local time: 3 of its 6 sheets.

The sky

Overcast at 3,000 ft; the ceiling is 3,000 ft; visibility 10 mi or more.

Section of the sky over Chamberlain, height above the station to scale: overcast cloud with its base at 3,000 feet, the ceiling at 3,000 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 STATION01,0002,0003,0004,0005,000ETAGESLOWTHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETOVC 3,000 FTOVERCAST, 8 EIGHTHS OF THE SKYCEILING 3,000 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

45.5 F with a dew point of 35.6 F, 68 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 2,300 ft up; the lowest cloud reported is at 3,000 ft.

Chart of the air at Chamberlain: temperature 45.5 degrees Fahrenheit and dew point 35.6, 68 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 2,300 feet above the station, against the lowest cloud reported at 3,000 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 F60 FSATURATES 2,300 FT ABOVE THE STATION, AT 33.5 FLOWEST CLOUD REPORTED, OVC 3,000 FTTEMPERATURE 45.5 FDEW POINT 35.6 FSPREAD 9.9 FRELATIVE HUMIDITY 68 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 (330 degrees) at 30 mph, gusting 37 mph: force 6, a strong breeze on the Beaufort scale. The strongest gust today was 41 mph.

Plan of the wind at Chamberlain, north up: blowing from 330 degrees, the north northwest, at 30 miles an hour, gusting 37; beside it the Beaufort scale from calm to hurricane force, force 6, strong 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 330°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE25NOW, 30 MPH7NEAR GALE32GUST, 37 MPH8GALE399STRONG 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

-

Snow on the ground

Elsewhere in South Dakota

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

Near Oacoma

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

Near Oacoma

River and lake gauges