WxDecoder

69WT Weather Quartermaster Harbor Seaplane Base

Vashon, WashingtonElevation 0 ftSeaplane base
OFF-FIELD REFERENCE
Nearest report: KSEA · 7 NM NE · 25 min old
Ceiling 6,000 ft, visibility 7 SM, rain.
No on-field report, so no field flight category. Conditions at the field may differ.
OFF-FIELD REFERENCE · KSEA
WIND
330@6
steady
VISIBILITY
7 SM
11.3 km
CEILING
6,000 ft
lowest BKN/OVC
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 350° at 6 kt, visibility 7 SM, temperature 8C. Treat this as supplemental, not an aviation observation. Forecast suggests today rain, high near 53F, low near 45F, 88% chance of precipitation. Key risks: thunderstorms in the forecast.

PILOT WEATHER NOTES
Thunderstorms in the forecastWeather.gov
Wednesday: Showers And Thunderstorms. Watch for developing convection and plan alternates.
DayConditionsTemp FWindGustsPrecipPilot note
Today Rain 53/45 ESE 4 kt – 88%
Monday Chance Light Rain then Mostly Cloudy 56/46 NNE 3 kt – 25%
Tuesday Partly Sunny then Slight Chance Light Rain 56/45 SSW 11 kt – 75%
Wednesday Showers And Thunderstorms 51/41 SSW 9 kt – 93% Thunderstorms in the forecast
Thursday Light Rain Likely 49/40 SSE 4 kt – 74%
Friday Slight Chance Light Rain 50/38 NE 3 kt – 20%
Saturday Partly Sunny 50/39 SSW 4 kt – 19%

Source: National Weather Service (office SEW). Forecast issued 1517Z.

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
2 runways
NESW15W33W4W22W
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

2 runways · longest 5,637 ft

04W/22W
Dimensions
5,637 x 200 ft
Surface
Water
RWY 04W
Traffic patternRight
RWY 22W
15W/33W
Dimensions
4,226 x 200 ft
Surface
Water
RWY 15W
Traffic patternRight
RWY 33W

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
0 ft MSL

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

DAYLIGHT & NIGHT

Sun & logging windows

Sunset
0104Z 6:04 PM
Sunrise
1444Z 7:44 AM
Loggable night
0135Z (6:35 PM local) → 1412Z (7:12 AM local)
end of evening to start of morning civil twilight
Position lights required
0104Z (6:04 PM local) → 1444Z (7:44 AM local)
sunset to sunrise (91.209)
Night passenger currency
0204Z (7:04 PM local) → 1344Z (6:44 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

Quartermaster Harbor Seaplane Base is in Vashon, Washington. Field elevation 0 ft MSL. Airport facts are drawn from OurAirports and the FAA NASR dataset.

OPERATIONS & CONTACT
OwnershipPrivately owned
UsePrivate use
TypeSeaplane base
ManagerKEVAN YALOWITZ
Manager phone2026412050
CHARTS & AIRSPACE
ICAO / IATA69WT
SectionalSEATTLE
Center (ARTCC)SEATTLE
Flight service (AFSS)SEATTLE
RegionWashington
CountryUnited States
Coordinates47.3929, -122.4605
Distance from city3 NM S
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

69WT traffic patterns

2026-06-18 to 2026-06-18, 1 days observed · data 2026-10-23

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

Busiest day: Thu · Busiest month: Jun

FLEET MIX
Piston single 100%

Mostly small piston aircraft.

TOP AIRCRAFT TYPES
›C182 (Piston single) · ~1 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

69WT has no on-field report. Nearest reporting station: KSEA (7 NM NE, VFR).

KSEA Seattle–Tacoma International Airport
7 NM NE
VFR
KTIW Tacoma Narrows Airport
9 NM SW
MVFR
KBFI King County International Airport - Boeing Field
10 NM NE
MVFR
KRNT Renton Municipal Airport
12 NM NE
VFR
KPWT Bremerton National Airport
14 NM NW
MVFR
KTCM McChord Air Force Base
15 NM S
LIFR
AIRPORT REMARKS

Operational remarks

›KEVAN@KEVANYALOWITZ.COM
OFFICIAL LINKS & SOURCES
↗Search NOTAMs (official FAA NOTAM Search)
↗69WT on OurAirports
FREQUENTLY ASKED
Does 69WT have a METAR?
No on-field METAR is issued for 69WT. This page uses the nearest reporting station as a reference.
Does 69WT have a TAF?
No TAF is issued directly for 69WT. Use the nearest TAF-issuing field as a planning reference.
What is the field elevation at 69WT?
69WT sits at 0 ft MSL, which factors into the density-altitude estimate on this page.
Is this an official preflight weather briefing for 69WT?
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.