Storm Station
Roy, Montana
42° 60°/39°
Clear· Feels like 36°·Gentle breeze 10 mph WNW
Partly cloudy, with a low around 40. West wind around 9 mph.
0UV Low
36Air quality
40%Humidity
0%Cloud
Now
2:15 AM
42feels36
now, clear
Today
Sep 27
6039
17mph
overcast
Mon
Sep 28
7144
13mph
overcast
Tue
Sep 29
7652
24mph
overcast
Wed
Sep 30
6149
21mph
overcast
Thu
Oct 1
6545
19mph
overcast
Fri
Oct 2
8550
15mph
overcast
Sat
Oct 3
6651
10%
22mph
partly cloudy day
42°
60°39°
71°44°
76°52°
61°49°
65°45°
85°50°
66°51°

As of 2:15 AM in Roy, Montana.

What is measuring near here

The 5 instruments nearest Roy, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 7.3 miles away.

measured now3 instruments

Judith RAWSJPKM8

A remote fire weather station/14.8 mi away/6,351 ft/2,863 ft above here

temp, wind, gust, humidity, pressure

Rank112of 702

Lewistown MunicipalLWT

At an airfield/30.9 mi away/4,167 ft/679 ft above here

temp, wind, gust, visibility, precip, pressure

Rank-

measured daily2 instruments

ValentineVALM8

At a cooperative observer's station/21.5 mi away/2,910 ft/578 ft below here

snowfall, snow depth, precip, high, low

Rank-

Lewistown 0.4 SWMT-FG-6

In a volunteer observer's own ground/29.3 mi away/4,019 ft/531 ft above here

precip, snowfall, snow depth

Rank-

Station report

The weather at Bohemian Corner JCT MT-19/US-191 MT US MT DOT, drawn

The nearest instrument reporting now, 7.3 mi from Roy. From its report of Sep 27, 2026, 2:00 AM local time: 3 of its 5 sheets.

The air

39.0 F with a dew point of 23.8 F, 54 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 3,400 ft up.

Chart of the air at Bohemian Corner JCT MT-19/US-191 MT US MT DOT: temperature 39.0 degrees Fahrenheit and dew point 23.8, 54 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 3,400 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MTBOHFIG. B THE AIR AT BOHEMIAN CORNER JCT MT-19/US-191 MT US MT DOTTHE 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 3,400 FT ABOVE THE STATION, AT 20.7 FTEMPERATURE 39.0 FDEW POINT 23.8 FSPREAD 15.2 FRELATIVE HUMIDITY 54 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 POINTTITLEBohemian Corner JCT MT-19/US-191 MT US MT DOT, the airSTATION REPORT · RWIS MTBOHTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 5DATE2026-09-27IDSR-MTBOH-1DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the west southwest (248 degrees) at 10 mph, gusting 13 mph: force 3, a gentle breeze on the Beaufort scale. The strongest gust today was 13 mph.

Plan of the wind at Bohemian Corner JCT MT-19/US-191 MT US MT DOT, north up: blowing from 248 degrees, the west southwest, at 10 miles an hour, gusting 13; beside it the Beaufort scale from calm to hurricane force, force 3, gentle breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MTBOHFIG. C THE WIND AT BOHEMIAN CORNER JCT MT-19/US-191 MT US MT DOTPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 248°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE8NOW, 10 MPH4MODERATE BREEZE13GUST, 13 MPH5FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEBohemian Corner JCT MT-19/US-191 MT US MT DOT, the windSTATION REPORT · RWIS MTBOHTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 2 of 5DATE2026-09-27IDSR-MTBOH-2DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008

The column

At 3,284 ft above sea level, 11 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 26.54 inHg and the temperature at 47.3 F; it reports 39.0 F, 8.3 F colder than standard.

Section from sea level of where Bohemian Corner JCT MT-19/US-191 MT US MT DOT stands in the atmosphere, height to scale: the station 3,284 feet above sea level with 11 per cent of the air below it; the standard atmosphere's pressure there, 26.54 inches of mercury, and temperature, 47.3 degrees Fahrenheit.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MTBOHFIG. D WHERE BOHEMIAN CORNER JCT MT-19/US-191 MT US MT DOT 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 ATMOSPHEREBOHEMIAN CORNER JCT MT-19/US-191 MT US MT DOT11 PER CENT OF THE AIR BELOW IT3,284 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 HERE26.54 inHgSTANDARD TEMPERATURE HERE47.3 FTEMPERATURE, REPORTED39.0 FTITLEBohemian Corner JCT MT-19/US-191 MT US MT DOT, the columnSTATION REPORT · RWIS MTBOHTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 3 of 5DATE2026-09-27IDSR-MTBOH-3DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

The full report of Bohemian Corner JCT MT-19/US-191 MT US MT DOT, in 5 sheets, each beside the Field Book plates that explain it

0in

Snow on the ground

Measured at Valentine (VALM8), 21.5 miles from here, read 26 Sep, 07:00. measured daily

Elsewhere in Montana

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

Near Roy

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