Storm Station
Sign in

Groton, South Dakota

City in Brown County, South Dakota

Air quality

The air at Groton

Index 15, good, led by fine particles. Read at 12 AM from its reporting area, Aberdeen (SD), 19 miles off.

15Good
  • Fine particles (PM2.5)15Good-
  • Coarse particles (PM10)8Good-

The days ahead

Yesterday measured 18, good.

Smoke, the next 43 hours

No smoke near the ground through Sat 7 PM.

FriSat

Precipitation

What has fallen at Groton

0.08 in in the last 24 hours, and none in the 2 days before, to Fri 12 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.08in
Last 3 days
0.08in

Visibility

How far you can see at Groton, the next 43 hours

Visibility stays 10 miles or more through Sat 7 PM.

FriSat

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

What is measuring near here

The 6 instruments nearest Groton, 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 now4 instruments

AberdeenABR

At an airfield/15.5 mi away/1,296 ft/7 ft below here

temp, wind, gust, visibility, precip, pressure

Rank473of 806

measured daily2 instruments

Groton 0.2 NNESD-BR-53

In a volunteer observer's own ground/0.3 mi away/1,307 ft/4 ft above here

precip, snowfall, snow depth

Rank-

Bath 1NEBTHS2

At a cooperative observer's station/9.7 mi away/1,293 ft/10 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Aberdeen, drawn

The nearest airport reporting now, 15.5 mi from Groton, South Dakota. From its report of Oct 16, 2026, 12:24 AM local time: 3 of its 6 sheets.

The sky

A few clouds at 2,100 ft, scattered at 2,900 ft, overcast at 3,600 ft; the ceiling is 3,600 ft.

Section of the sky over Aberdeen, height above the station to scale: a few clouds cloud with its base at 2,100 feet, scattered cloud with its base at 2,900 feet, overcast cloud with its base at 3,600 feet, the ceiling at 3,600 feet.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT ABRFIG. A THE SKY OVER ABERDEENSECTION, 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 STATION01,0002,0003,0004,0005,0006,000ETAGESLOWTHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETOVC 3,600 FTOVERCAST, 8 EIGHTHS OF THE SKYSCT 2,900 FTSCATTERED, 3 TO 4 EIGHTHS OF THE SKYFEW 2,100 FTA FEW CLOUDS, 1 TO 2 EIGHTHS OF THE SKYCEILING 3,600 FTTITLEAberdeen, the skySTATION REPORT · ASOS ABRTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-10-16IDSR-ABR-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

45.0 F with a dew point of 37.0 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 2,100 ft.

Chart of the air at Aberdeen: temperature 45.0 degrees Fahrenheit and dew point 37.0, 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 2,100 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT ABRFIG. B THE AIR AT ABERDEENTHE 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 F60 FSATURATES 1,800 FT ABOVE THE STATION, AT 35.2 FLOWEST CLOUD REPORTED, FEW 2,100 FTTEMPERATURE 45.0 FDEW POINT 37.0 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 POINTTITLEAberdeen, the airSTATION REPORT · ASOS ABRTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-10-16IDSR-ABR-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the north (350 degrees) at 25 mph, gusting 46 mph: force 6, a strong breeze on the Beaufort scale. The strongest gust today was 55 mph.

Plan of the wind at Aberdeen, north up: blowing from 350 degrees, the north, at 25 miles an hour, gusting 46; beside it the Beaufort scale from calm to hurricane force, force 6, strong breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT ABRFIG. C THE WIND AT ABERDEENPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 350°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE25NOW, 25 MPH7NEAR GALE328GALE39GUST, 46 MPH9STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEAberdeen, the windSTATION REPORT · ASOS ABRTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-10-16IDSR-ABR-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Aberdeen, 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 Groton

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

Near Groton

River and lake gauges