Storm Station
Greycliff, Montana
53°
Mostly clear· Feels like 53°·Light air 3 mph WNW
Partly cloudy. Low around 41, with temperatures rising to around 43 overnight. East southeast wind around 2 mph.
-UV
-Air quality
39%Humidity
26%Cloud

What is measuring near here

The 5 instruments nearest Greycliff, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 9.6 miles away.

measured now3 instruments

Big Timber6S0

At an airfield/9.8 mi away/4,475 ft/539 ft above here

temp, wind, gust, visibility, precip, pressure

Rank702of 702

Reedpoint I-90 MP 390.8MTRDP

Beside a road/10.4 mi away/3,783 ft/153 ft below here

temp, pavement temp, wind, visibility, precip

Rank593of 702

Derby Mountain RAWSDBYM8

A remote fire weather station/12.5 mi away/6,020 ft/2,084 ft above here

temp, wind, gust, humidity, pressure

Rank72of 702

measured daily2 instruments

Big TimberBGTM8

At a cooperative observer's station/9.6 mi away/4,112 ft/176 ft above here

snowfall, snow depth, precip, high, low

Rank-

Reed Point 5 SEMT-SW-1

In a volunteer observer's own ground/16.1 mi away/3,826 ft/110 ft below here

precip, snowfall, snow depth

Rank-

Station report

The weather at Reedpoint I-90 MP 390.8, drawn

The nearest instrument reporting now, 10.4 mi from Greycliff. From its report of Sep 27, 2026, 4:45 AM local time: 3 of its 5 sheets.

The air

37.0 F with a dew point of 33.5 F, 87 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 800 ft up.

Chart of the air at Reedpoint I-90 MP 390.8: temperature 37.0 degrees Fahrenheit and dew point 33.5, 87 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 800 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MTRDPFIG. B THE AIR AT REEDPOINT I-90 MP 390.8THE 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 FSATURATES 800 FT ABOVE THE STATION, AT 32.7 FTEMPERATURE 37.0 FDEW POINT 33.5 FSPREAD 3.5 FRELATIVE HUMIDITY 87 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 POINTTITLEReedpoint I-90 MP 390.8, the airSTATION REPORT · RWIS MTRDPTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 5DATE2026-09-27IDSR-MTRDP-1DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

Calm.

Plan of the wind at Reedpoint I-90 MP 390.8, 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 MTRDPFIG. C THE WIND AT REEDPOINT I-90 MP 390.8PLAN, 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 FORCE73TITLEReedpoint I-90 MP 390.8, the windSTATION REPORT · RWIS MTRDPTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 2 of 5DATE2026-09-27IDSR-MTRDP-2DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008

The column

At 3,783 ft above sea level, 13 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 26.05 inHg and the temperature at 45.5 F; it reports 37.0 F, 8.5 F colder than standard.

Section from sea level of where Reedpoint I-90 MP 390.8 stands in the atmosphere, height to scale: the station 3,783 feet above sea level with 13 per cent of the air below it; the standard atmosphere's pressure there, 26.05 inches of mercury, and temperature, 45.5 degrees Fahrenheit.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MTRDPFIG. D WHERE REEDPOINT I-90 MP 390.8 STANDS IN THE ATMOSPHERESECTION FROM SEA LEVEL, HEIGHT TO SCALE, THE STATION IN THE STANDARD ATMOSPHEREFT ABOVE SEA LEVEL05,00010,00015,000SEA LEVEL, 29.92 inHg IN THE STANDARD ATMOSPHEREREEDPOINT I-90 MP 390.813 PER CENT OF THE AIR BELOW IT3,783 FT10 PER CENT OF THE AIR BELOW, 2,890 FT20 PER CENT OF THE AIR BELOW, 6,050 FT30 PER CENT OF THE AIR BELOW, 9,540 FT40 PER CENT OF THE AIR BELOW, 13,470 FTSTANDARD PRESSURE HERE26.05 inHgSTANDARD TEMPERATURE HERE45.5 FTEMPERATURE, REPORTED37.0 FTITLEReedpoint I-90 MP 390.8, the columnSTATION REPORT · RWIS MTRDPTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 3 of 5DATE2026-09-27IDSR-MTRDP-3DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

The full report of Reedpoint I-90 MP 390.8, in 5 sheets, each beside the Field Book plates that explain it

-in

Snow on the ground

Elsewhere in Montana

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

Near Greycliff

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