21MT Weather Harris Runway Airport

Bozeman, MontanaElevation 4,582 ftSmall airport

OFF-FIELD REFERENCE

Nearest report: KBZN · 4 NM NW · More than 1 hour old

Ceiling 400 ft, visibility 9 SM.

No on-field report, so no field flight category. Conditions at the field may differ.

OFF-FIELD REFERENCE · KBZN

WIND

020@5

steady

VISIBILITY

9 SM

14.5 km

CEILING

400 ft

lowest BKN/OVC

ACTIVE NWS ALERTS

Active weather alerts

Dense Fog AdvisoryModerate · Expected · Likely

25 1905Z to 26 1800Z

Elkhorn and Boulder Mountains; Canyon Ferry Area; Missouri Headwaters; Madison River Valley; Gallatin Valley; Northwest Beaverhead County; Beaverhead and Western Madison below 6000ft; Gallatin and Madison County Mountains and Centennial Mountains

* WHAT...Variable visibility down to a quarter mile or less in dense fog. * WHERE...Canyon Ferry Area, Elkhorn and Boulder Mountains, Beaverhead and Western Madison below 6000ft, Gallatin Valley, Gallatin and Madison County Mountains and Centennial Mountains, Madison River Valley, Missouri Headwaters, and Northwest Beaverhead County. * WHEN...Until noon MDT Monday. * IMPACTS...Low visibility co…

If driving, slow down, use your headlights, and leave plenty of distance ahead of you.

Alerts from the National Weather Service. For situational awareness only; always confirm against an official briefing.

FORECAST & PILOT NOTES · SUPPLEMENTAL

Extended forecast and pilot notes

No aviation METAR is published for this airport. The nearest National Weather Service station reports wind from 350° at 5 kt, visibility 6 SM, temperature 0C. Treat this as supplemental, not an aviation observation. Forecast suggests tonight areas of fog, low near 20F, 0% chance of precipitation. Key risks: no significant hazards are highlighted right now, but always confirm against an official briefing.

Day	Conditions	Temp F	Wind	Gusts	Precip
Tonight	Areas Of Fog	20	ENE 8 kt	–	0%
Monday	Areas Of Fog then Mostly Cloudy	54/29	NE 5 kt	–	84%
Tuesday	Rain And Snow Likely then Partly Sunny	46/23	WSW 15 kt	24 kt	60%
Wednesday	Sunny	50/24	SSW 3 kt	–	3%
Thursday	Mostly Sunny	52/24	S 4 kt	–	13%
Friday	Chance Rain And Snow	47/24	NW 3 kt	–	30%
Saturday	Slight Chance Rain And Snow	48/25	SW 2 kt	–	19%
Sunday	Chance Rain And Snow	50	SW 2 kt	–	41%

Source: National Weather Service (office TFX). Forecast issued 0145Z.

Radar

Radar data: NOAA/NWS MRMS composite reflectivity. For situational awareness only, not a substitute for an official weather briefing.

OUR HEADSET PICK · NOT SPONSORED

David Clark DC ONE-X

Not sponsored, just the headset we'd buy ourselves: the DC ONE-X, with hybrid noise canceling, Bluetooth, and 30+ hour battery. And David Clark's A+ customer service is the real reason we recommend them.

Visit David Clark

RUNWAYS & WIND

Crosswind calculator

No runway layout is available for 21MT. Enter a runway number or heading to estimate wind components.

RUNWAYS

Runway detail & declared distances

2 runways · longest 2,050 ft

18/36

Dimensions

1,900 x 50 ft

Surface

Turf

RWY 18

RWY 36

09/27

Dimensions

2,050 x 50 ft

Surface

Turf

RWY 09

RWY 27

Runway data from the FAA NASR dataset (effective 2026-06-11). Verify with the current Chart Supplement and NOTAMs.

FIELD CONDITIONS

Field elevation

4,582 ft MSL

Density and pressure altitude need a current temperature and altimeter from the METAR.

DAYLIGHT & NIGHT

Sun & logging windows

Sunset

0021Z 6:21 PM

Sunrise

1355Z 7:55 AM

Loggable night

0052Z (6:52 PM local) → 1325Z (7:25 AM local)

end of evening to start of morning civil twilight

Position lights required

0021Z (6:21 PM local) → 1355Z (7:55 AM local)

sunset to sunrise (91.209)

Night passenger currency

0121Z (7:21 PM local) → 1255Z (6:55 AM local)

1 hr after sunset to 1 hr before sunrise (61.57(b))

FAA definitions, shown in Zulu with airport-local time. Verify for your operation.

AIRPORT INFORMATION

Facility & services

Harris Runway Airport is in Bozeman, Montana. Field elevation 4,582 ft MSL. Airport facts are drawn from OurAirports and the FAA NASR dataset.

OPERATIONS & CONTACT

OwnershipPrivately owned

UsePrivate use

TypeSmall airport

ManagerLLOYD HARRIS

Manager phone(406) 579-5452

AttendedUNATNDD

CHARTS & AIRSPACE

ICAO / IATA21MT

SectionalGREAT FALLS

Center (ARTCC)SALT LAKE CITY

Flight service (AFSS)GREAT FALLS

RegionMontana

CountryUnited States

Coordinates45.7478, -111.0727

Distance from city5 NM SE

SERVICES & LIGHTING

Control towerNon-towered

AIRCRAFT ACTIVITY

Traffic patterns

Aircraft activity data is not available for this airport yet.

NEARBY AIRPORTS

Weather reference stations

21MT has no on-field report. Nearest reporting station: KBZN (4 NM NW, LIFR).

KBZN Bozeman Yellowstone International Airport

VFR

KBTM Bert Mooney Airport

61 NM W

VFR

KWYS Yellowstone Airport

64 NM S

VFR

KHLN Helena Regional Airport

VFR

AIRPORT REMARKS

Operational remarks

›CELL 406-579-5452

›FOR CD CTC BIG SKY APCH AT 208-364-5860/5861, IF UNABLE CTC SALT LAKE ARTCC AT 801-320-2568.

OFFICIAL LINKS & SOURCES

↗Search NOTAMs (official FAA NOTAM Search)

↗21MT on OurAirports

FREQUENTLY ASKED

Does 21MT have a METAR?

No on-field METAR is issued for 21MT. This page uses the nearest reporting station as a reference.

Does 21MT have a TAF?

No TAF is issued directly for 21MT. Use the nearest TAF-issuing field as a planning reference.

What is the field elevation at 21MT?

21MT sits at 4,582 ft MSL, which factors into the density-altitude estimate on this page.

Is this an official preflight weather briefing for 21MT?

No. wxdecoder.com is for education and situational awareness only. It is not an official weather briefing or a substitute for official sources, NOTAM review, and pilot judgment.

This app is for aviation weather education, training, and situational awareness only. It is not a substitute for an official weather briefing, approved flight-planning software, flight service, dispatch procedures, current FAA regulations, or pilot judgment. Always verify weather with official sources before flight.