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Judith Gap, Montana

City in Wheatland County, Montana

Air quality

The air at Judith Gap

Index 29, good, led by fine particles. Read at 6 AM from its reporting area, Lewistown (MT), 29 miles off.

29Good
  • Fine particles (PM2.5)29Good-
  • Ozone28Good-
  • Coarse particles (PM10)1Good-

The days ahead

Yesterday measured 32, good.

Smoke, the next 43 hours

Little smoke near the ground through Sun 12 AM: the index from smoke stays at 11 or under.

FriSat

Precipitation

What has fallen at Judith Gap

None in the last 3 days, to Fri 5 AM. Measured by radar and rain gauges, as water.

Last 24 hours
0.00in
Last 3 days
0.00in

Visibility

How far you can see at Judith Gap, the next 43 hours

Visibility stays 10 miles or more through Sun 12 AM.

FriSat

On the radar over Judith Gap, MontanaReflectivityStorm topsRain rateRain, last 24 hoursForecast temperatureForecast rain totalEvery picture

What is measuring near here

The 7 instruments nearest Judith Gap, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.1 miles away.

measured now5 instruments

Lima1LM

At an airfield/1.8 mi away/4,602 ft/39 ft below here

temp, wind, gust, visibility, precip, pressure

Rank-

MoccasinS2119

At a soil climate station/27.9 mi away/4,256 ft/385 ft below here

temp, humidity, soil temp, soil moisture

Rank687of 1,053

measured daily2 instruments

Judith GapGAPM8

At a cooperative observer's station/0.1 mi away/4,639 ft/2 ft below here

snowfall, snow depth, precip, high, low

Rank-

Buffalo 1.7 EMT-FG-3

In a volunteer observer's own ground/10.1 mi away/4,271 ft/370 ft below here

precip, snowfall, snow depth

Rank-

Station report

The weather at Judith Gap US-191 MP 18.6, drawn

The nearest instrument reporting now, 0.7 mi from Judith Gap, Montana. From its report of Oct 16, 2026, 6:00 AM local time: 3 of its 5 sheets.

The air

23.0 F with a dew point of 21.5 F, 94 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 300 ft up.

Chart of the air at Judith Gap US-191 MP 18.6: temperature 23.0 degrees Fahrenheit and dew point 21.5, 94 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 300 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MTJUDFIG. B THE AIR AT JUDITH GAP US-191 MP 18.6THE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,00010 F20 F30 FSATURATES 300 FT ABOVE THE STATION, AT 21.2 FTEMPERATURE AND DEW POINT 23.0 F, 21.5 FRELATIVE HUMIDITY 94 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 POINTTITLEJudith Gap US-191 MP 18.6, the airSTATION REPORT · RWIS MTJUDTYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 5DATE2026-10-16IDSR-MTJUD-1DRAWN AS linework on paperSOURCES FB-WAT-020, FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the south southeast (158 degrees) at 10 mph, gusting 11 mph: force 3, a gentle breeze on the Beaufort scale. The strongest gust today was 15 mph.

Plan of the wind at Judith Gap US-191 MP 18.6, north up: blowing from 158 degrees, the south southeast, at 10 miles an hour, gusting 11; beside it the Beaufort scale from calm to hurricane force, force 3, gentle breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MTJUDFIG. C THE WIND AT JUDITH GAP US-191 MP 18.6PLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 158°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE43GENTLE BREEZE8NOW, 10 MPH4MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEJudith Gap US-191 MP 18.6, the windSTATION REPORT · RWIS MTJUDTYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 2 of 5DATE2026-10-16IDSR-MTJUD-2DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008

The column

At 4,675 ft above sea level, 16 per cent of the atmosphere's air lies below the station. The standard atmosphere puts the pressure there at 25.20 inHg and the temperature at 42.3 F; it reports 23.0 F, 19.3 F colder than standard.

Section from sea level of where Judith Gap US-191 MP 18.6 stands in the atmosphere, height to scale: the station 4,675 feet above sea level with 16 per cent of the air below it; the standard atmosphere's pressure there, 25.20 inches of mercury, and temperature, 42.3 degrees Fahrenheit.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT MTJUDFIG. D WHERE JUDITH GAP US-191 MP 18.6 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 ATMOSPHEREJUDITH GAP US-191 MP 18.616 PER CENT OF THE AIR BELOW IT4,675 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 HERE25.20 inHgSTANDARD TEMPERATURE HERE42.3 FTEMPERATURE, REPORTED23.0 FTITLEJudith Gap US-191 MP 18.6, the columnSTATION REPORT · RWIS MTJUDTYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 3 of 5DATE2026-10-16IDSR-MTJUD-3DRAWN AS linework on paperSOURCES FB-ENG-001, FB-ENG-003

The full report of Judith Gap US-191 MP 18.6, in 5 sheets, each beside the Field Book plates that explain it

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Snow on the ground

Elsewhere in Montana

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

Near Judith Gap

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

Near Judith Gap

River and lake gauges