WxDecoder

US-1087 Weather Yellowstone Seaplane Base

West Yellowstone, MontanaElevation 6,534 ftSeaplane base
OFF-FIELD REFERENCE
Nearest report: KWYS · 11 NM SE · 23 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 · KWYS
WIND
Calm
no steady wind
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 calm, temperature 1.67C. This observation is older than usual, so treat it with extra caution. Treat this as supplemental, not an aviation observation. Forecast suggests tonight mostly clear then patchy fog, low near 29F, 1% chance of precipitation. Key risks: no significant hazards are highlighted right now, but always confirm against an official briefing.

DayConditionsTemp FWindGustsPrecipPilot note
Tonight Mostly Clear then Patchy Fog 29 ESE 1 kt – 1%
Monday Areas Of Fog then Mostly Cloudy 47/28 SSE 6 kt 16 kt 98%
Tuesday Light Snow Likely 36/24 SW 12 kt 19 kt 67%
Wednesday Partly Sunny 39/24 S 9 kt 20 kt 12%
Thursday Mostly Sunny 45/29 S 9 kt 19 kt 45%
Friday Light Snow Likely 44/28 S 4 kt – 61%
Saturday Chance Light Snow 45/27 S 2 kt – 48%
Sunday Chance Light Snow 46 SSE 2 kt – 50%

Source: National Weather Service (office TFX). Forecast issued 0437Z.

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-1087. Enter a runway number or heading to estimate wind components.
RUNWAYS

Runway detail & declared distances

1 runway · longest 12,007 ft

13W/31W
Dimensions
12,007 x 3,000 ft
Surface
Water
RWY 13W
RWY 31W

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
6,534 ft MSL

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

DAYLIGHT & NIGHT

Sun & logging windows

Sunset
0024Z 6:24 PM
Sunrise
1354Z 7:54 AM
Loggable night
0054Z (6:54 PM local) → 1324Z (7:24 AM local)
end of evening to start of morning civil twilight
Position lights required
0024Z (6:24 PM local) → 1354Z (7:54 AM local)
sunset to sunrise (91.209)
Night passenger currency
0124Z (7:24 PM local) → 1254Z (6:54 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

Yellowstone Seaplane Base is in West Yellowstone, Montana. Field elevation 6,534 ft MSL. Airport facts are drawn from OurAirports and the FAA NASR dataset.

OPERATIONS & CONTACT
OwnershipPrivately owned
UseOpen to the public
TypeSeaplane base
ManagerLAUREN DEWIT
Manager phone406-208-3004
CHARTS & AIRSPACE
ICAO / IATAUS-1087
SectionalGREAT FALLS
Center (ARTCC)SALT LAKE CITY
Flight service (AFSS)BOISE
RegionMontana
CountryUnited States
Coordinates44.8300, -111.2875
Distance from city13 NM NW
SERVICES & LIGHTING
Control towerNon-towered
CTAF123.000
UNICOM123.000
FREQUENCIES

Communications

123.000
CTAF
CTAF
123.000
UNICOM
UNICOM

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

AIRCRAFT ACTIVITY

Traffic patterns

Aircraft activity data is not available for this airport yet.

NEARBY AIRPORTS

Weather reference stations

US-1087 has no on-field report. Nearest reporting station: KWYS (11 NM SE, VFR).

KWYS Yellowstone Airport
11 NM SE
VFR
KBZN Bozeman Yellowstone International Airport
57 NM N
LIFR
KDLN Dillon Airport
59 NM NW
IFR
KLVM Mission Field
63 NM NE
VFR
KRXE Rexburg Madison County Airport
64 NM S
VFR
KJAC Jackson Hole Airport
77 NM S
VFR
AIRPORT REMARKS

Operational remarks

›NO DOCKING LCTN AVBL.
OFFICIAL LINKS & SOURCES
↗Search NOTAMs (official FAA NOTAM Search)
↗US-1087 on OurAirports
FREQUENTLY ASKED
Does US-1087 have a METAR?
No on-field METAR is issued for US-1087. This page uses the nearest reporting station as a reference.
Does US-1087 have a TAF?
No TAF is issued directly for US-1087. Use the nearest TAF-issuing field as a planning reference.
What is the field elevation at US-1087?
US-1087 sits at 6,534 ft MSL, which factors into the density-altitude estimate on this page.
Is this an official preflight weather briefing for US-1087?
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.