WxDecoder

ID91 Weather St Alphonsus Heliport

Boise, IdahoElevation 2,800 ftHeliport
OFF-FIELD REFERENCE
Nearest report: KBOI · 3 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 · KBOI
WIND
140@4
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 140° at 3 kt, visibility 10 SM, temperature 12C. Treat this as supplemental, not an aviation observation. Forecast suggests tonight mostly cloudy, low near 42F, 1% chance of precipitation. Key risks: thunderstorms in the forecast.

PILOT WEATHER NOTES
Thunderstorms in the forecastWeather.gov
Monday: Partly Sunny then Showers And Thunderstorms Likely. Watch for developing convection and plan alternates.
DayConditionsTemp FWindGustsPrecipPilot note
Tonight Mostly Cloudy 42 SSE 10 kt 18 kt 1%
Monday Partly Sunny then Showers And Thunderstorms Likely 60/38 SW 10 kt 18 kt 63% Thunderstorms in the forecast
Tuesday Partly Sunny 56/36 S 4 kt – 6%
Wednesday Sunny 61/37 SSE 6 kt – 1%
Thursday Mostly Sunny 60/36 SE 4 kt – 9%
Friday Partly Sunny 58/34 NNW 4 kt – 27%
Saturday Chance Rain And Snow Showers then Chance Rain Showers 57/34 SSW 3 kt – 28%
Sunday Chance Rain Showers 57 N 4 kt – 37%

Source: National Weather Service (office BOI). Forecast issued 0244Z.

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 ID91. Enter a runway number or heading to estimate wind components.
RUNWAYS

Runway detail & declared distances

1 runway · longest 50 ft

H1
Dimensions
25 x 25 ft
Surface
Concrete (poor)
Edge lights
PERI
RWY H1
Traffic patternLeft

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
2,800 ft MSL

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

DAYLIGHT & NIGHT

Sun & logging windows

Sunset
0046Z 6:46 PM
Sunrise
1412Z 8:12 AM
Loggable night
0115Z (7:15 PM local) → 1343Z (7:43 AM local)
end of evening to start of morning civil twilight
Position lights required
0046Z (6:46 PM local) → 1412Z (8:12 AM local)
sunset to sunrise (91.209)
Night passenger currency
0146Z (7:46 PM local) → 1312Z (7:12 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

St Alphonsus Heliport is in Boise, Idaho. Field elevation 2,800 ft MSL. Airport facts are drawn from OurAirports and the FAA NASR dataset.

OPERATIONS & CONTACT
OwnershipPrivately owned
UsePrivate use
TypeHeliport
ManagerJOE KANE
Manager phone(208) 367-5992
AttendedUNATNDD
CHARTS & AIRSPACE
ICAO / IATAID91
SectionalSALT LAKE CITY
Center (ARTCC)SALT LAKE CITY
Flight service (AFSS)BOISE
RegionIdaho
CountryUnited States
Coordinates43.6143, -116.2640
Distance from city0 NM N
SERVICES & LIGHTING
Control towerNon-towered
Field lightingSunset to sunrise
BeaconWhite-green-yellow (heliport)
UNICOM123.075
FREQUENCIES

Communications

123.075
UNICOM
UNICOM

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

AIRCRAFT ACTIVITY

ID91 traffic patterns

2026-06-15 to 2026-10-23, 42 days observed · data 2026-10-23

High confidence
TRAFFIC VOLUME (30-DAY)
AVG LANDINGS/DAY
4.4
AVG OPS/DAY
5.7
Activity trend over 18 days: flat, from 3 to 3 operations per dayOperations trend (18 days)

Busiest day: Sun · Busiest month: Oct

FLEET MIX
Helicopter 100%

Mostly rotorcraft.

TOP AIRCRAFT TYPES
›B407 (Helicopter) · ~25 landings/mo
›B429 (Helicopter) · ~10 landings/mo
›EC35 (Helicopter) · ~0 landings/mo
›UNKN (Unknown) · ~0 landings/mo
LIKELY BASED AIRCRAFT
Low-confidence estimate

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

›B407 (Helicopter)
›B429 (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

ID91 has no on-field report. Nearest reporting station: KBOI (3 NM SE, VFR).

KBOI Boise Air Terminal/Gowen Field
3 NM SE
VFR
KMUO Mountain Home Air Force Base
38 NM SE
VFR
KONO Ontario Municipal Airport
41 NM NW
VFR
KMYL McCall Municipal Airport
77 NM N
VFR
KGNG Gooding Municipal Airport
78 NM SE
VFR
KSUN Friedman Memorial Airport
86 NM E
VFR
AIRPORT REMARKS

Operational remarks

›ROOFTOP
›15 FT LGTD ANT 50 FT FM HELIPAD.
›MEDICAL USE.
›FOR CD CTC BIG SKY APCH AT 208-364-5860/5861.
OFFICIAL LINKS & SOURCES
↗Search NOTAMs (official FAA NOTAM Search)
↗ID91 on OurAirports
FREQUENTLY ASKED
Does ID91 have a METAR?
No on-field METAR is issued for ID91. This page uses the nearest reporting station as a reference.
Does ID91 have a TAF?
No TAF is issued directly for ID91. Use the nearest TAF-issuing field as a planning reference.
What is the field elevation at ID91?
ID91 sits at 2,800 ft MSL, which factors into the density-altitude estimate on this page.
Is this an official preflight weather briefing for ID91?
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.