US-1901 Weather Mount Wilson Heliport

Pasadena, CaliforniaHeliport
OFF-FIELD REFERENCE
Nearest report: KEMT · 8 NM S · More than 1 hour old
No ceiling, visibility 10 SM.
No on-field report, so no field flight category. Conditions at the field may differ.
OFF-FIELD REFERENCE · KEMT
WIND
200@8
steady
VISIBILITY
10 SM
16.1 km
CEILING
None
no BKN/OVC layer
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 161° at 17 kt, gusting 28 kt, temperature 7.22C. 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, low near 50F, 0% 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 50 WNW 4 kt – 0%
Monday Sunny 63/48 W 4 kt – 0%
Tuesday Sunny 61/48 SSW 4 kt – 0%
Wednesday Mostly Sunny 59/45 S 4 kt – 1%
Thursday Mostly Cloudy 51/43 SSE 4 kt – 15%
Friday Slight Chance Rain Showers 48/40 S 4 kt – 20%
Saturday Chance Rain Showers 46/39 SSE 4 kt – 90%
Sunday Rain Showers 43 SSW 4 kt – 90%

Source: National Weather Service (office LOX). Forecast issued 0156Z.

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-1901. Enter a runway number or heading to estimate wind components.
DAYLIGHT & NIGHT

Sun & logging windows

Sunset
0106Z 6:06 PM
Sunrise
1406Z 7:06 AM
Loggable night
0132Z (6:32 PM local) → 1341Z (6:41 AM local)
end of evening to start of morning civil twilight
Position lights required
0106Z (6:06 PM local) → 1406Z (7:06 AM local)
sunset to sunrise (91.209)
Night passenger currency
0206Z (7:06 PM local) → 1306Z (6:06 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

Mount Wilson Heliport is in Pasadena, California. Airport facts are drawn from OurAirports and the FAA NASR dataset.

OPERATIONS & CONTACT
TypeHeliport
CHARTS & AIRSPACE
ICAO / IATAUS-1901
RegionCalifornia
CountryUnited States
Coordinates34.2229, -118.0626
SERVICES & LIGHTING
Control towerNon-towered
AIRCRAFT ACTIVITY

US-1901 traffic patterns

2026-06-12 to 2026-09-08, 4 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: Fri · Busiest month: Sep

FLEET MIX
Helicopter 67%Unknown 33%

Mostly rotorcraft.

TOP AIRCRAFT TYPES
›AA1 (Unknown) · ~1 landings/mo
›AS50 (Helicopter) · ~1 landings/mo
›B429 (Helicopter) · ~1 landings/mo
›AS32 (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

US-1901 has no on-field report. Nearest reporting station: KEMT (8 NM S, VFR).

FREQUENTLY ASKED
Does US-1901 have a METAR?
No on-field METAR is issued for US-1901. This page uses the nearest reporting station as a reference.
Does US-1901 have a TAF?
No TAF is issued directly for US-1901. Use the nearest TAF-issuing field as a planning reference.
Is this an official preflight weather briefing for US-1901?
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.