KM45 Weather Alpine County Airport

Markleeville, CaliforniaElevation 5,867 ftSmall airport

OFF-FIELD REFERENCE

Nearest report: KTVL · 14 NM NW · 19 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 · KTVL

WIND

190@10

steady

VISIBILITY

10 SM

16.1 km

CEILING

None

no BKN/OVC layer

ACTIVE NWS ALERTS

Active weather alerts

Lake Wind AdvisoryModerate · Expected · Likely

26 1100Z to 27 0100Z

Greater Lake Tahoe Area; Greater Lake Tahoe Area

* WHAT...Southwest winds 15 to 25 mph with gusts up to 40 mph for Lake Tahoe, Donner Lake, and Prosser and Boca Reservoirs. Waves 2 to 4 feet on Lake Tahoe. * WHERE...Greater Lake Tahoe Area. * WHEN...From 4 AM to 6 PM PDT Monday. * IMPACTS...Strong winds and rough waves on area lakes will create hazardous conditions for small craft.

Check lake conditions before heading out and be prepared for a sudden increase in winds and wave heights. Consider postponing boating activities on the lake until a day with less wind.

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 149° at 2 kt, temperature 4.44C. This observation is older than usual, so treat it with extra caution. Treat this as supplemental, not an aviation observation. Forecast suggests tonight partly cloudy, low near 37F, 1% chance of precipitation. Key risks: strong winds in the forecast.

PILOT WEATHER NOTES

Strong winds in the forecastWeather.gov

Tonight: winds up to 26 kt. Re-check crosswind components closer to departure.

Day	Conditions	Temp F	Wind	Gusts	Precip	Pilot note
Tonight	Partly Cloudy	37	SW 13 kt	26 kt	1%	Strong winds in the forecast
Monday	Mostly Sunny	60/31	SW 17 kt	30 kt	0%
Tuesday	Sunny	61/29	SW 13 kt	22 kt	0%
Wednesday	Sunny	60/32	SW 4 kt	–	2%
Thursday	Partly Sunny	58/30	SW 13 kt	–	8%
Friday	Mostly Sunny	53/27	SW 17 kt	–	21%
Saturday	Chance Light Snow	49/28	SW 9 kt	–	31%
Sunday	Chance Light Snow	47	SW 4 kt	–	33%

Source: National Weather Service (office REV). Forecast issued 0112Z.

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

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 4,443 ft

17/35

Dimensions

4,443 x 50 ft

Surface

Asphalt (poor)

RWY 17184°T

RWY 354°T

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

5,867 ft MSL

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

DAYLIGHT & NIGHT

Sun & logging windows

Sunset

0107Z 6:07 PM

Sunrise

1419Z 7:19 AM

Loggable night

0134Z (6:34 PM local) → 1352Z (6:52 AM local)

end of evening to start of morning civil twilight

Position lights required

0107Z (6:07 PM local) → 1419Z (7:19 AM local)

sunset to sunrise (91.209)

Night passenger currency

0207Z (7:07 PM local) → 1319Z (6:19 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

Alpine County Airport is in Markleeville, California. Field elevation 5,867 ft MSL. Airport facts are drawn from OurAirports and the FAA NASR dataset.

OPERATIONS & CONTACT

OwnershipPublicly owned

UseOpen to the public

TypeSmall airport

ManagerSAM BOOTH

Manager phone530-694-2140

AttendedUNATNDD

CHARTS & AIRSPACE

ICAO / IATAKM45

SectionalSAN FRANCISCO

Center (ARTCC)OAKLAND

Flight service (AFSS)RENO

RegionCalifornia

CountryUnited States

Coordinates38.7347, -119.7670

Distance from city3 NM N

SERVICES & LIGHTING

Control towerNon-towered

Traffic pattern alt800 ft MSL

CTAF122.900

FREQUENCIES

Communications

122.9

CTAF

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

AIRCRAFT ACTIVITY

KM45 traffic patterns

2026-07-17 to 2026-10-18, 14 days observed · data 2026-10-23

Low confidence

TRAFFIC VOLUME (30-DAY)

AVG LANDINGS/DAY

AVG OPS/DAY

2.3

Operations trend (4 days)

Busiest day: Sun · Busiest month: Oct

FLEET MIX

Piston single 55%Helicopter 30%Unknown 8%Turboprop 8%

Mostly small piston aircraft.

TOP AIRCRAFT TYPES

›C182 (Piston single) · ~1 landings/mo

›B212 (Helicopter) · ~1 landings/mo

›C172 (Piston single) · ~1 landings/mo

›C185 (Piston single) · ~1 landings/mo

›C206 (Piston single) · ~1 landings/mo

LIKELY BASED AIRCRAFT

Low-confidence estimate

Aircraft likely based near this airport (estimate), mostly rotorcraft.

›UNKN (Helicopter)

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

KM45 has no on-field report. Nearest reporting station: KTVL (14 NM NW, VFR).

KTVL Lake Tahoe Airport

14 NM NW

VFR

KMEV Minden-Tahoe Airport

16 NM N

VFR

KCXP Carson Airport

28 NM N

VFR

KTRK Truckee Tahoe Airport

39 NM NW

VFR

KRNO Reno Tahoe International Airport

46 NM N

VFR

KPVF Placerville Airport

46 NM W

VFR

AIRPORT REMARKS

Operational remarks

›NO SNOW REMOVAL, ARPT CLOSED WHEN SNOW ON RUNWAY.

›LARGE STONES ALONG EDGE OF RWY OFF GRADED SFC.

›LOOSE GRVL ON RWY.

›TREES PENETRATING TRANSITIONAL SFCS E & W OF RY.

›THIS AIRPORT HAS BEEN SURVEYED BY THE NATIONAL GEODETIC SURVEY.

›SOIL CONDITIONS OFF RY IS POOR IN WET CONDITIONS. CALL PUBLIC WORKS FOR ADDITIONAL INFORMATION 530-694-2140 EXT."0".

›RY 17/35 LIMITED BY AIRPORT OPERATOR TO 4,800 LBS SINGLE WHEEL, 9,600 LBS DUAL WHEEL.

›X 425

›DIRECTOR OF COMMUNITY DEVELOPMENT

›FOR CD CTC OAKLAND ARTCC AT 510-745-3380.

OFFICIAL LINKS & SOURCES

↗Search NOTAMs (official FAA NOTAM Search)

↗Wikipedia

↗KM45 on OurAirports

FREQUENTLY ASKED

Does KM45 have a METAR?

No on-field METAR is issued for KM45. This page uses the nearest reporting station as a reference.

Does KM45 have a TAF?

No TAF is issued directly for KM45. Use the nearest TAF-issuing field as a planning reference.

What is the field elevation at KM45?

KM45 sits at 5,867 ft MSL, which factors into the density-altitude estimate on this page.

Is this an official preflight weather briefing for KM45?

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.