WxDecoder

1WA8 Weather Madigan Army Medical Center Heliport

Joint Base Lewis-McChord, WashingtonElevation 300 ftHeliport
OFF-FIELD REFERENCE
Nearest report: KGRF · 2 NM SW · 54 min old
Ceiling 7,500 ft, visibility 9 SM, rain.
No on-field report, so no field flight category. Conditions at the field may differ.
OFF-FIELD REFERENCE · KGRF
WIND
140@4
steady
VISIBILITY
9 SM
14.5 km
CEILING
7,500 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 calm, visibility 10 SM, temperature 8C. Treat this as supplemental, not an aviation observation. Forecast suggests sunday rain, high near 56F, low near 40F, 94% 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
Sunday Rain 56/40 E 4 kt – 94%
Monday Chance Light Rain then Mostly Cloudy 59/40 E 2 kt – 34%
Tuesday Chance Light Rain 58/39 SSW 8 kt – 81%
Wednesday Showers And Thunderstorms 54/35 SSW 9 kt – 96% Thunderstorms in the forecast
Thursday Light Rain 53/34 SSE 3 kt – 79%
Friday Slight Chance Light Rain 53/32 NE 3 kt – 19%
Saturday Partly Sunny 54 SW 2 kt – 14%

Source: National Weather Service (office SEW). Forecast issued 1048Z.

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 1WA8. Enter a runway number or heading to estimate wind components.
RUNWAYS

Runway detail & declared distances

1 runway · longest 40 ft

H1
Dimensions
40 x 40 ft
Surface
Concrete
RWY H1

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
300 ft MSL

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

DAYLIGHT & NIGHT

Sun & logging windows

Sunset
0106Z 6:06 PM
Sunrise
1442Z 7:42 AM
Loggable night
0138Z (6:38 PM local) → 1411Z (7:11 AM local)
end of evening to start of morning civil twilight
Position lights required
0106Z (6:06 PM local) → 1442Z (7:42 AM local)
sunset to sunrise (91.209)
Night passenger currency
0206Z (7:06 PM local) → 1342Z (6:42 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

Madigan Army Medical Center Heliport is in Joint Base Lewis-McChord, Washington. Field elevation 300 ft MSL. Airport facts are drawn from OurAirports and the FAA NASR dataset.

OPERATIONS & CONTACT
OwnershipArmy owned
UsePrivate use
TypeHeliport
ManagerMADIGAN ARMY MEDICAL CENTER
Manager phone253-968-1110
AttendedUNATNDD
CHARTS & AIRSPACE
ICAO / IATA1WA8
SectionalSEATTLE
Center (ARTCC)SEATTLE
Flight service (AFSS)SEATTLE
RegionWashington
CountryUnited States
Coordinates47.1098, -122.5571
Distance from city0 NM E
SERVICES & LIGHTING
Control towerNon-towered
AIRCRAFT ACTIVITY

1WA8 traffic patterns

2026-06-18 to 2026-10-16, 11 days observed · data 2026-10-23

Low confidence
TRAFFIC VOLUME (30-DAY)
AVG LANDINGS/DAY
1.5
AVG OPS/DAY
1.8
Activity trend over 4 days: flat, from 1 to 1 operations per dayOperations trend (4 days)

Busiest day: Wed · Busiest month: Aug

FLEET MIX
Helicopter 77%Airliner 23%

Mostly rotorcraft.

TOP AIRCRAFT TYPES
›H60 (Helicopter) · ~2 landings/mo
›C17 (Airliner) · ~1 landings/mo
›H47 (Helicopter) · ~1 landings/mo
LIKELY BASED AIRCRAFT
Low-confidence estimate

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

›H60 (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

1WA8 has no on-field report. Nearest reporting station: KGRF (2 NM SW, VFR).

KGRF Gray Army Air Field
2 NM SW
VFR
KTCM McChord Air Force Base
4 NM NE
VFR
KTIW Tacoma Narrows Airport
9 NM N
VFR
KOLM Olympia Regional Airport
16 NM SW
IFR
KSEA Seattle–Tacoma International Airport
23 NM NE
VFR
KPWT Bremerton National Airport
24 NM N
VFR
AIRPORT REMARKS

Operational remarks

›FOR CD CTC SEATTLE APCH AT 206-214-4794.
›INSTL AT&A OFFICER.
›ADDNL PHONE 253-967-5998.
›MEDICAL USE.
›MULTICOM 126.2 AVBL FROM GRAY TOWER.
OFFICIAL LINKS & SOURCES
↗Search NOTAMs (official FAA NOTAM Search)
↗1WA8 on OurAirports
FREQUENTLY ASKED
Does 1WA8 have a METAR?
No on-field METAR is issued for 1WA8. This page uses the nearest reporting station as a reference.
Does 1WA8 have a TAF?
No TAF is issued directly for 1WA8. Use the nearest TAF-issuing field as a planning reference.
What is the field elevation at 1WA8?
1WA8 sits at 300 ft MSL, which factors into the density-altitude estimate on this page.
Is this an official preflight weather briefing for 1WA8?
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.