Storm Station
Mountain Plains, South Dakota
55°
Mostly clear· Feels like 55°·Light air 2 mph ENE
A slight chance of showers and thunderstorms between noon and 3pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 63. East wind 1 to 7 mph, with gusts as high as 22 mph. Chance of precipitation is 30%.
-UV
-Air quality
69%Humidity
35%Cloud

What is measuring near here

The 5 instruments nearest Mountain Plains, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 1.7 miles away.

measured now3 instruments

Spearfish RAWSSFRS2

A remote fire weather station/2.4 mi away/4,253 ft/107 ft above here

temp, wind, gust, humidity, pressure

Rank65of 427

SpearfishSPF

At an airfield/4.2 mi away/3,892 ft/254 ft below here

temp, wind, gust, visibility, precip, pressure

Rank354of 427

SD RWIS SavoySD061

Beside a road/8.8 mi away/4,974 ft/828 ft above here

temp, pavement temp, wind, visibility, precip

Rank-

measured daily2 instruments

Spearfish 0.1 WSWSD-LW-15

In a volunteer observer's own ground/1.7 mi away/3,754 ft/392 ft below here

precip, snowfall, snow depth

Rank-

SpearfishSPES2

At a cooperative observer's station/3.2 mi away/3,517 ft/629 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Spearfish, drawn

The nearest airport reporting now, 4.2 mi from Mountain Plains. From its report of Sep 27, 2026, 7:35 AM local time: 3 of its 6 sheets.

The sky

Overcast at 2,100 ft; the ceiling is 2,100 ft; visibility 10 mi or more.

Section of the sky over Spearfish, height above the station to scale: overcast cloud with its base at 2,100 feet, the ceiling at 2,100 feet, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SPFFIG. A THE SKY OVER SPEARFISHSECTION, 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 STATION05001,0001,5002,0002,5003,0003,500ETAGESLOWTHE STATIONTHE CEILOMETER READS TO 12,000 FT, ABOVE THIS SHEETOVC 2,100 FTOVERCAST, 8 EIGHTHS OF THE SKYCEILING 2,100 FTVISIBILITY, MILES: 10 MI OR MORE0510TITLESpearfish, the skySTATION REPORT · ASOS SPFTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-09-27IDSR-SPF-1DRAWN AS linework on paperSOURCES FB-SKY-001, FB-SKY-017, FB-SKY-016, FB-SKY-018

The air

55.4 F with a dew point of 46.4 F, 72 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 2,100 ft up; the lowest cloud reported is at 2,100 ft.

Chart of the air at Spearfish: temperature 55.4 degrees Fahrenheit and dew point 46.4, 72 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 2,100 feet above the station, against the lowest cloud reported at 2,100 feet; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SPFFIG. B THE AIR AT SPEARFISHTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00030 F40 F50 F60 F70 FSATURATES 2,100 FT ABOVE THE STATION, AT 44.4 FLOWEST CLOUD REPORTED, OVC 2,100 FTTEMPERATURE 55.4 FDEW POINT 46.4 FSPREAD 9.0 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 POINTTITLESpearfish, the airSTATION REPORT · ASOS SPFTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-09-27IDSR-SPF-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

Calm.

Plan of the wind at Spearfish, north up: calm; beside it the Beaufort scale from calm to hurricane force, force 0, calm, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT SPFFIG. C THE WIND AT SPEARFISHPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONCALMBEAUFORT FORCELEAST WIND, MPH0CALM0NOW, 0 MPH1LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLESpearfish, the windSTATION REPORT · ASOS SPFTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-09-27IDSR-SPF-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Spearfish, in 6 sheets, each beside the Field Book plates that explain it

0in

Snow on the ground

Measured at Spearfish (SPES2), 3.2 miles from here, read 25 Sep, 09:00. measured daily

Elsewhere in South Dakota

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

Near Mountain Plains

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