WxDecoder

1MU9 Weather Nielsens Medical Evac Heliport

Saint Charles, MissouriElevation 425 ftHeliport
OFF-FIELD REFERENCE
Nearest report: KSTL · 12 NM SE · 4 min old
Ceiling 25,000 ft, visibility 10 SM.
No on-field report, so no field flight category. Conditions at the field may differ.
OFF-FIELD REFERENCE · KSTL
WIND
120@5
steady
VISIBILITY
10 SM
16.1 km
CEILING
25,000 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 calm, visibility 10 SM, temperature 15C. Treat this as supplemental, not an aviation observation. Forecast suggests tonight mostly cloudy, low near 52F, 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 Cloudy 52 SE 2 kt – 1%
Monday Partly Sunny 78/51 S 5 kt – 2%
Tuesday Mostly Cloudy 77/53 S 6 kt – 0%
Wednesday Sunny 80/56 S 7 kt – 1%
Thursday Sunny 84/57 S 7 kt – 3%
Friday Mostly Sunny 82/59 S 6 kt – 15%
Saturday Rain Showers Likely 76/59 S 8 kt – 67%
Sunday Slight Chance Rain Showers 77 SW 8 kt – 24%

Source: National Weather Service (office LSX). Forecast issued 0155Z.

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 1MU9. Enter a runway number or heading to estimate wind components.
RUNWAYS

Runway detail

H1
Dimensions
100 x 100 ft
Surface
TURF
FIELD CONDITIONS

Field elevation

Field elevation
425 ft MSL

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

DAYLIGHT & NIGHT

Sun & logging windows

Sunset
2310Z 6:10 PM
Sunrise
1222Z 7:22 AM
Loggable night
2337Z (6:37 PM local) → 1155Z (6:55 AM local)
end of evening to start of morning civil twilight
Position lights required
2310Z (6:10 PM local) → 1222Z (7:22 AM local)
sunset to sunrise (91.209)
Night passenger currency
0010Z (7:10 PM local) → 1122Z (6:22 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

Nielsens Medical Evac Heliport is in Saint Charles, Missouri. Field elevation 425 ft MSL. Airport facts are drawn from OurAirports and the FAA NASR dataset.

OPERATIONS & CONTACT
TypeHeliport
CHARTS & AIRSPACE
ICAO / IATA1MU9
RegionMissouri
CountryUnited States
Coordinates38.9353, -90.4765
SERVICES & LIGHTING
Control towerNon-towered
AIRCRAFT ACTIVITY

1MU9 traffic patterns

2026-09-09 to 2026-10-03, 4 days observed · data 2026-10-23

Low confidence
TRAFFIC VOLUME (30-DAY)
AVG LANDINGS/DAY
0.8
AVG OPS/DAY
1.5
Activity trend over 4 days: rising, from 1 to 2 operations per dayOperations trend (4 days)

Busiest day: Mon · Busiest month: Oct

FLEET MIX
Piston single 100%

Mostly small piston aircraft.

TOP AIRCRAFT TYPES
›C172 (Piston single) · ~2 landings/mo
›B06 (Helicopter) · ~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

1MU9 has no on-field report. Nearest reporting station: KSTL (12 NM SE, VFR).

KSTL St. Louis Lambert International Airport
12 NM SE
VFR
KSUS Spirit of St Louis Airport
18 NM SW
VFR
KALN St Louis Regional Airport
20 NM E
VFR
KCPS St Louis Downtown Airport
27 NM SE
VFR
KBLV Scott AFB/Midamerica Airport
38 NM SE
VFR
KIJX Jacksonville Municipal Airport
52 NM N
VFR
OFFICIAL LINKS & SOURCES
↗Search NOTAMs (official FAA NOTAM Search)
↗1MU9 on OurAirports
FREQUENTLY ASKED
Does 1MU9 have a METAR?
No on-field METAR is issued for 1MU9. This page uses the nearest reporting station as a reference.
Does 1MU9 have a TAF?
No TAF is issued directly for 1MU9. Use the nearest TAF-issuing field as a planning reference.
What is the field elevation at 1MU9?
1MU9 sits at 425 ft MSL, which factors into the density-altitude estimate on this page.
Is this an official preflight weather briefing for 1MU9?
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.