WxDecoder

MT40 Weather Horner Field

Great Falls, MontanaElevation 3,429 ftSmall airport
OFF-FIELD REFERENCE
Nearest report: KGTF · 8 NM SW · 25 min old
No ceiling, visibility 10 SM.
No on-field report, so no field flight category. Conditions at the field may differ.
OFF-FIELD REFERENCE · KGTF
WIND
290@3
steady
VISIBILITY
10 SM
16.1 km
CEILING
None
no BKN/OVC layer
ACTIVE NWS ALERTS

Active weather alerts

Special Weather StatementModerate · Expected · Observed
25 1328Z to 25 1530Z
Cascade County below 5000ft; Meagher County Valleys
Patchy dense fog will continue to be a concern for the remainder of the morning. Expect variable visibility reductions down to a quarter of a mile or less. Those traveling should be prepared for highly variable road conditions, including sharp visibility reductions across short distances. Also, frost deposition may cause slippery spots on area roads. Use low beam head lights, slow down and allow …

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 300° at 3 kt, visibility 10 SM, temperature -2.1C. This observation is older than usual, so treat it with extra caution. Treat this as supplemental, not an aviation observation. Forecast suggests today patchy fog then partly sunny, high near 41F, low near 19F, 0% chance of precipitation. Key risks: strong winds in the forecast.

PILOT WEATHER NOTES
Strong winds in the forecastWeather.gov
Tuesday: winds up to 27 kt. Re-check crosswind components closer to departure.
DayConditionsTemp FWindGustsPrecipPilot note
Today Patchy Fog then Partly Sunny 41/19 NE 3 kt – 0%
Monday Areas Of Fog then Partly Sunny 45/28 SSE 3 kt – 43%
Tuesday Chance Rain And Snow 49/31 WSW 17 kt 27 kt 45% Strong winds in the forecast
Wednesday Mostly Sunny 51/27 SW 8 kt – 13%
Thursday Slight Chance Light Snow then Partly Sunny 42/25 NNW 6 kt – 44%
Friday Chance Light Snow 40/24 NNW 3 kt – 33%
Saturday Slight Chance Light Snow then Mostly Sunny 43/26 SW 4 kt – 18%

Source: National Weather Service (office TFX). Forecast issued 1517Z.

Radar

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

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RUNWAYS & WIND
Crosswind calculator
No runway layout is available for MT40. Enter a runway number or heading to estimate wind components.
RUNWAYS

Runway detail & declared distances

3 runways · longest 4,809 ft

13/31
Dimensions
1,600 x 90 ft
Surface
Turf
RWY 13
RWY 31
09/27
Dimensions
1,300 x 90 ft
Surface
Turf
RWY 09
RWY 27
03/21
Dimensions
2,350 x 90 ft
Surface
Turf
RWY 03
RWY 21

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

FIELD CONDITIONS

Field elevation

Field elevation
3,429 ft MSL

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

DAYLIGHT & NIGHT

Sun & logging windows

Sunset
0019Z 6:19 PM
Sunrise
1359Z 7:59 AM
Loggable night
0050Z (6:50 PM local) → 1328Z (7:28 AM local)
end of evening to start of morning civil twilight
Position lights required
0019Z (6:19 PM local) → 1359Z (7:59 AM local)
sunset to sunrise (91.209)
Night passenger currency
0119Z (7:19 PM local) → 1259Z (6:59 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

Horner Field is in Great Falls, Montana. Field elevation 3,429 ft MSL. Airport facts are drawn from OurAirports and the FAA NASR dataset.

OPERATIONS & CONTACT
OwnershipPrivately owned
UsePrivate use
TypeSmall airport
ManagerSHANE LINSE
Manager phone406-671-6105
AttendedUNATNDD
CHARTS & AIRSPACE
ICAO / IATAMT40
SectionalBILLINGS
Center (ARTCC)SEATTLE
Flight service (AFSS)SEATTLE
RegionMontana
CountryUnited States
Coordinates47.5937, -111.2700
Distance from city7 NM W
SERVICES & LIGHTING
Control towerNon-towered
AIRCRAFT ACTIVITY

Traffic patterns

Aircraft activity data is not available for this airport yet.

NEARBY AIRPORTS

Weather reference stations

MT40 has no on-field report. Nearest reporting station: KGTF (8 NM SW, VFR).

KGTF Great Falls International Airport
8 NM SW
VFR
KSBX Shelby Airport
62 NM NW
VFR
KHLN Helena Regional Airport
66 NM SW
MVFR
KCTB Cut Bank International Airport
75 NM NW
VFR
KHVR Havre City County Airport
83 NM NE
VFR
AIRPORT REMARKS

Operational remarks

›FOR CD CTC BILLINGS APCH AT 406-255-2798
OFFICIAL LINKS & SOURCES
↗Search NOTAMs (official FAA NOTAM Search)
↗MT40 on OurAirports
FREQUENTLY ASKED
Does MT40 have a METAR?
No on-field METAR is issued for MT40. This page uses the nearest reporting station as a reference.
Does MT40 have a TAF?
No TAF is issued directly for MT40. Use the nearest TAF-issuing field as a planning reference.
What is the field elevation at MT40?
MT40 sits at 3,429 ft MSL, which factors into the density-altitude estimate on this page.
Is this an official preflight weather briefing for MT40?
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.