WxDecoder

US-1985 Weather M4 Strip

East Helena, MontanaElevation 4,164 ftSmall airport
OFF-FIELD REFERENCE
Nearest report: KHLN · 5 NM NW · 40 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 · KHLN
WIND
270@5
steady
VISIBILITY
10 SM
16.1 km
CEILING
None
no BKN/OVC layer
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 260° at 6 kt, visibility 10 SM, temperature -1C. Treat this as supplemental, not an aviation observation. Forecast suggests tonight mostly cloudy then patchy fog, low near 21F, 0% chance of precipitation. Key risks: no significant hazards are highlighted right now, but always confirm against an official briefing.

DayConditionsTemp FWindGustsPrecipPilot note
Tonight Mostly Cloudy then Patchy Fog 21 SW 2 kt – 0%
Monday Areas Of Fog then Mostly Cloudy 47/31 ESE 4 kt – 82%
Tuesday Chance Rain And Snow 47/26 WSW 12 kt 21 kt 33%
Wednesday Sunny 49/25 SSE 6 kt – 17%
Thursday Mostly Sunny 44/23 NW 4 kt – 18%
Friday Slight Chance Light Snow 42/23 NNW 3 kt – 30%
Saturday Slight Chance Rain And Snow 45/25 NW 2 kt – 16%
Sunday Mostly Sunny then Chance Rain And Snow 47 WSW 3 kt – 32%

Source: National Weather Service (office TFX). Forecast issued 0433Z.

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 US-1985. Enter a runway number or heading to estimate wind components.
RUNWAYS

Runway detail & declared distances

1 runway

10/28
Dimensions
1,800 x 40 ft
Surface
Turf
RWY 10
Traffic patternRight
RWY 28
Traffic patternRight

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
4,164 ft MSL

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

DAYLIGHT & NIGHT

Sun & logging windows

Sunset
0023Z 6:23 PM
Sunrise
1400Z 8:00 AM
Loggable night
0054Z (6:54 PM local) → 1329Z (7:29 AM local)
end of evening to start of morning civil twilight
Position lights required
0023Z (6:23 PM local) → 1400Z (8:00 AM local)
sunset to sunrise (91.209)
Night passenger currency
0123Z (7:23 PM local) → 1300Z (7:00 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

M4 Strip is in East Helena, Montana. Field elevation 4,164 ft MSL. Airport facts are drawn from OurAirports and the FAA NASR dataset.

OPERATIONS & CONTACT
OwnershipPrivately owned
UsePrivate use
TypeSmall airport
ManagerRICHARD MARONICK
Manager phone406-459-0567
CHARTS & AIRSPACE
ICAO / IATAUS-1985
SectionalGREAT FALLS
Center (ARTCC)SALT LAKE CITY
Flight service (AFSS)GREAT FALLS
RegionMontana
CountryUnited States
Coordinates46.5473, -111.8897
Distance from city3 NM SSE
SERVICES & LIGHTING
Control towerNon-towered
AIRCRAFT ACTIVITY

US-1985 traffic patterns

2026-06-30 to 2026-07-24, 5 days observed · data 2026-10-23

Insufficient confidence
TRAFFIC VOLUME (30-DAY)
AVG LANDINGS/DAY
0.8
AVG OPS/DAY
1.6
Activity trend over 5 days: rising, from 1 to 2 operations per dayOperations trend (5 days)

Busiest day: Fri · Busiest month: Jul

FLEET MIX
Piston single 100%

Mostly small piston aircraft.

TOP AIRCRAFT TYPES
›HUSK (Piston single) · ~2 landings/mo
LIKELY BASED AIRCRAFT
Low-confidence estimate

Aircraft likely based near this airport (estimate), mostly single-engine piston aircraft.

›HUSK (Piston single)

This is an estimate based on repeated flight patterns, not registration data. Do not rely on it to identify specific aircraft or owners.

Data limitations (4)
›ADS-B coverage is incomplete; counts are an observed lower bound, not official totals.
›Some aircraft do not transmit usable ADS-B and are not counted.
›Aircraft types and based estimates are inferred and may be wrong.
›This is not official ATC, FAA, or airport data.
NEARBY AIRPORTS

Weather reference stations

US-1985 has no on-field report. Nearest reporting station: KHLN (5 NM NW, VFR).

KHLN Helena Regional Airport
5 NM NW
VFR
KBTM Bert Mooney Airport
44 NM SW
VFR
KBZN Bozeman Yellowstone International Airport
55 NM SE
LIFR
KGTF Great Falls International Airport
60 NM N
VFR
KLVM Mission Field
79 NM SE
VFR
KDLN Dillon Airport
82 NM S
IFR
AIRPORT REMARKS

Operational remarks

›RMARONICK@GMAIL.COM
OFFICIAL LINKS & SOURCES
↗Search NOTAMs (official FAA NOTAM Search)
↗US-1985 on OurAirports
FREQUENTLY ASKED
Does US-1985 have a METAR?
No on-field METAR is issued for US-1985. This page uses the nearest reporting station as a reference.
Does US-1985 have a TAF?
No TAF is issued directly for US-1985. Use the nearest TAF-issuing field as a planning reference.
What is the field elevation at US-1985?
US-1985 sits at 4,164 ft MSL, which factors into the density-altitude estimate on this page.
Is this an official preflight weather briefing for US-1985?
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.