WxDecoder

W12 Weather Lost River Airport

Mazama, WashingtonElevation 2,415 ftSmall airport
OFF-FIELD REFERENCE
Nearest report: KOMK · 41 NM E · 8 min old
Ceiling 2,300 ft, visibility 10 SM.
No on-field report, so no field flight category. Conditions at the field may differ.
OFF-FIELD REFERENCE · KOMK
WIND
350@3
steady
VISIBILITY
10 SM
16.1 km
CEILING
2,300 ft
lowest BKN/OVC
ACTIVE NWS ALERTS

Active weather alerts

Winter Weather AdvisoryModerate · Expected · Likely
28 0000Z to 29 0000Z
Western Chelan County; Western Okanogan County
* WHAT...Mountain snow expected above 3000 feet. Snow accumulations of 2 to 8 inches expected with the highest amounts along the Cascade crest. * WHERE...Washington Pass, Holden Village, Loup Loup Pass, and Stevens Pass. * WHEN...From 5 PM Tuesday to 5 PM PDT Wednesday. * IMPACTS...Winter travel conditions expected. * ADDITIONAL DETAILS...Snow level of 4000 feet Tuesday evening falling to 2500…
Slow down and use caution while traveling. For the latest travel information in Washington, go to https://wsdot.wa.gov/travel

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 332° at 1 kt, temperature -0.56C. This observation is older than usual, so treat it with extra caution. Treat this as supplemental, not an aviation observation. Forecast suggests tuesday rain showers, high near 53F, low near 33F, 93% chance of precipitation. Key risks: no significant hazards are highlighted right now, but always confirm against an official briefing.

DayConditionsTemp FWindGustsPrecipPilot note
Tuesday Rain Showers 53/33 W 2 kt – 93%
Wednesday Rain And Snow Showers Likely 47/27 SW 1 kt – 69%
Thursday Chance Snow Showers 45/28 NE 2 kt – 57%
Friday Chance Snow Showers 47/23 0 kt – 52%
Saturday Partly Sunny 49/24 0 kt – 10%
Sunday Mostly Sunny 51/25 NW 1 kt – 4%
Monday Mostly Sunny 55 0 kt – 9%

Source: National Weather Service (office OTX). Forecast issued 0901Z.

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 W12. Enter a runway number or heading to estimate wind components.
RUNWAYS

Runway detail & declared distances

1 runway · longest 3,150 ft

11/29
Dimensions
3,150 x 85 ft
Surface
Turf
RWY 11
Traffic patternRight
RWY 29

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
2,415 ft MSL

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

DAYLIGHT & NIGHT

Sun & logging windows

Sunset
0052Z 5:52 PM
Sunrise
1440Z 7:40 AM
Loggable night
0124Z (6:24 PM local) → 1407Z (7:07 AM local)
end of evening to start of morning civil twilight
Position lights required
0052Z (5:52 PM local) → 1440Z (7:40 AM local)
sunset to sunrise (91.209)
Night passenger currency
0152Z (6:52 PM local) → 1340Z (6:40 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

Lost River Airport is in Mazama, Washington. Field elevation 2,415 ft MSL. Airport facts are drawn from OurAirports and the FAA NASR dataset.

OPERATIONS & CONTACT
OwnershipPrivately owned
UseOpen to the public
TypeSmall airport
ManagerPATRICIA HEGLUND
Manager phone608-317-7850
AttendedUNATNDD
CHARTS & AIRSPACE
ICAO / IATAW12
SectionalSEATTLE
Center (ARTCC)SEATTLE
Flight service (AFSS)SEATTLE
RegionWashington
CountryUnited States
Coordinates48.6496, -120.5020
Distance from city5 NM NW
SERVICES & LIGHTING
Control towerNon-towered
CTAF122.900
FREQUENCIES

Communications

122.900
CTAF
CTAF

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

AIRCRAFT ACTIVITY

W12 traffic patterns

2026-06-14 to 2026-09-26, 2 days observed · data 2026-10-25

Low confidence
TRAFFIC VOLUME (30-DAY)
AVG LANDINGS/DAY
0
AVG OPS/DAY
1
Operations trend (1 days)

Busiest day: Sat · Busiest month: Sep

FLEET MIX
Piston single 100%

Mostly small piston aircraft.

TOP AIRCRAFT TYPES
›C172 (Piston single) · ~1 landings/mo
›C150 (Piston single) · ~0 landings/mo
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

W12 has no on-field report. Nearest reporting station: KOMK (41 NM E, MVFR).

KOMK Omak Airport
41 NM E
MVFR
CYHE Hope Airport / FVRD Regional Airpark
58 NM NW
MVFR
CYYF Penticton Airport
60 NM NE
VFR
KEAT Pangborn Memorial Airport
76 NM S
VFR
CYXX Abbotsford International Airport
77 NM W
VFR
KBVS Skagit Regional Airport
77 NM W
VFR
AIRPORT REMARKS

Operational remarks

›ARPT CLSD 1 NOV THRU 1 APR.
›FILED FOR RECORD KEEPING PURPOSES ONLY.
›FOR CD CTC SEATTLE ARTCC AT 253-351-3694.
›ACCESS ROADS BOTH SIDE OF RWY IN PRIM SFC, VEHICLES CROSS RWY AT VARIOUS LOCATIONS, PRIMARILY AT RWY ENDS.
›WATCH FOR VEHICLES AND PEDESTRIANS ON RWY.
›MARKED (PAINTED) ON CONCRETE PAD.
›11/29 +60 FT TREES IN PRIMARY SFC BOTH SIDES RY.
OFFICIAL LINKS & SOURCES
↗Search NOTAMs (official FAA NOTAM Search)
↗W12 on OurAirports
FREQUENTLY ASKED
Does W12 have a METAR?
No on-field METAR is issued for W12. This page uses the nearest reporting station as a reference.
Does W12 have a TAF?
No TAF is issued directly for W12. Use the nearest TAF-issuing field as a planning reference.
What is the field elevation at W12?
W12 sits at 2,415 ft MSL, which factors into the density-altitude estimate on this page.
Is this an official preflight weather briefing for W12?
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.