WxDecoder

K4N1 Weather Greenwood Lake Airport

West Milford, New JerseyElevation 791 ftSmall airport
OFF-FIELD REFERENCE
Nearest report: KCDW · 15 NM S · 31 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 · KCDW
WIND
Calm
no steady wind
VISIBILITY
10 SM
16.1 km
CEILING
None
no BKN/OVC layer
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 250° at 3 kt, visibility 10 SM, temperature -1C. Treat this as supplemental, not an aviation observation. Forecast suggests monday patchy frost then sunny, high near 67F, low near 42F, 2% chance of precipitation. Key risks: no significant hazards are highlighted right now, but always confirm against an official briefing.

DayConditionsTemp FWindGustsPrecipPilot note
Monday Patchy Frost then Sunny 67/42 NW 4 kt – 2%
Tuesday Sunny 58/34 N 4 kt – 2%
Wednesday Areas Of Frost then Sunny 61/43 W 2 kt – 0%
Thursday Sunny 66/48 SW 5 kt – 0%
Friday Sunny 72/47 W 4 kt – 1%
Saturday Mostly Sunny 66/47 NW 2 kt – 6%
Sunday Partly Sunny then Slight Chance Rain Showers 64 SW 3 kt – 15%

Source: National Weather Service (office OKX). Forecast issued 0923Z.

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
1 runway
NESW0624
WIND
No on-field weather data
No reporting weather station on the field, so wind components cannot be computed. See nearby stations below.
RUNWAYS

Runway detail & declared distances

1 runway · longest 3,471 ft

06/24
Dimensions
3,471 x 60 ft
Surface
Asphalt (excellent)
Edge lights
MED
RWY 0648°T
Traffic patternRight
RWY 24228°T
VGSIPAPI (P2L)
Traffic patternLeft

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
791 ft MSL

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

DAYLIGHT & NIGHT

Sun & logging windows

Sunset
2202Z 6:02 PM
Sunrise
1121Z 7:21 AM
Loggable night
2230Z (6:30 PM local) → 1052Z (6:52 AM local)
end of evening to start of morning civil twilight
Position lights required
2202Z (6:02 PM local) → 1121Z (7:21 AM local)
sunset to sunrise (91.209)
Night passenger currency
2302Z (7:02 PM local) → 1021Z (6:21 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

Greenwood Lake Airport is in West Milford, New Jersey. Field elevation 791 ft MSL. Airport facts are drawn from OurAirports and the FAA NASR dataset.

OPERATIONS & CONTACT
OwnershipPublicly owned
UseOpen to the public
TypeSmall airport
ManagerTIM WAGNER
Manager phone973-728-7721
AttendedDaily, 0800–1700
CHARTS & AIRSPACE
ICAO / IATAK4N1
SectionalNEW YORK
Center (ARTCC)NEW YORK
Flight service (AFSS)MILLVILLE
RegionNew Jersey
CountryUnited States
Coordinates41.1282, -74.3467
Distance from city1 NM E
SERVICES & LIGHTING
Fuel100LL · Jet A
Control towerNon-towered
Field lightingSee remarks
BeaconSunset to sunrise · White-green (lighted land airport)
CTAF122.900
FREQUENCIES

Communications

127.6
NEW YORK APP/DEP
A/D
122.9
CTAF
CTAF

Not all tower/ground/approach frequencies are in our datasets. Verify with the FAA Chart Supplement.

AIRCRAFT ACTIVITY

K4N1 traffic patterns

2026-06-12 to 2026-10-23, 64 days observed · data 2026-10-23

Medium confidence
TRAFFIC VOLUME (30-DAY)
AVG LANDINGS/DAY
13.2
AVG OPS/DAY
20.3
Activity trend over 14 days: falling, from 46 to 20 operations per dayOperations trend (14 days)

Busiest day: Wed · Busiest month: Sep

FLEET MIX
Piston single 84%Helicopter 9%Unknown 4%Turboprop 2%Twin 1%

Mostly small piston aircraft.

TOP AIRCRAFT TYPES
›C172 (Piston single) · ~99 landings/mo
›C72R (Piston single) · ~17 landings/mo
›C182 (Piston single) · ~10 landings/mo
›EC35 (Helicopter) · ~10 landings/mo
›C82R (Piston single) · ~8 landings/mo
LIKELY BASED AIRCRAFT
Low-confidence estimate

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

›C172 (Piston single)
›C182 (Piston single)
›P28A (Piston single)
›EC35 (Helicopter)
›C72R (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

K4N1 has no on-field report. Nearest reporting station: KCDW (15 NM S, VFR).

KCDW Essex County Airport
15 NM S
VFR
KMMU Morristown Municipal Airport
20 NM S
VFR
KTEB Teterboro Airport
21 NM SE
VFR
KMGJ Orange County Airport
23 NM N
VFR
KSWF New York Stewart International Airport
25 NM NE
VFR
KEWR Newark Liberty International Airport
28 NM S
VFR
AIRPORT REMARKS

Operational remarks

›FOR CD CTC NEWARK APCH AT 800-645-3206.
›DEER AND BIRDS ON AND INVOF ARPT.
›RECOMMENDED THAT WIRES RWY 6 APCH BE MKD WITH PLASTIC BALLS OR PUT UNDERGND (WIRES NOW MKD & LGTS MOUNTED ON POLES).
›RY 06/24 STEEP ROCK LEDGES LCTD JUST BYD BOTH RY ENDS.
›AUTOMATED UNICOM; 3 CLICKS TO ACTVT.
›ARPT SUBJECT TO GUSTING WIND & FREQUENT CROSSWINDS.
›ACTVT MIRL RWY 06/24 - CTAF, 5 CLICKS. PAPI RWY 24 OPR CONSLY.
›TREES BELOW RWY END, CLIFF.
›SOME RWY AND TWY LGTS TALLER THAN STANDARD.
›DROP ZONE LCTD SE SIDE OF RWY.
OFFICIAL LINKS & SOURCES
↗Search NOTAMs (official FAA NOTAM Search)
↗Wikipedia
↗K4N1 on OurAirports
FREQUENTLY ASKED
Does K4N1 have a METAR?
No on-field METAR is issued for K4N1. This page uses the nearest reporting station as a reference.
Does K4N1 have a TAF?
No TAF is issued directly for K4N1. Use the nearest TAF-issuing field as a planning reference.
What is the field elevation at K4N1?
K4N1 sits at 791 ft MSL, which factors into the density-altitude estimate on this page.
Is this an official preflight weather briefing for K4N1?
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.