wxdecoder
US-1216

Loon Lake Seaplane Base

Grand Marais, MinnesotaElevation 1,765 ftSeaplane base
SUPPLEMENTAL
N/A
Nearest NWS station (nearest NWS station): 21°C. Supplemental, not an aviation observation.
ACTIVE NWS ALERTS

Active weather alerts

Severe Thunderstorm WatchSevere · Future · Possible
27 0630Z to 27 1400Z
Cook, MN; Itasca, MN; Koochiching, MN; Lake, MN; St. Louis, MN; Ashland, WI; Bayfield, WI; Douglas, WI; Iron, WI; Price, WI; Sawyer, WI; Washburn, WI
THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH 518 IN EFFECT UNTIL 9 AM CDT THIS MORNING FOR THE FOLLOWING AREAS IN MINNESOTA THIS WATCH INCLUDES 5 COUNTIES IN NORTH CENTRAL MINNESOTA ITASCA KOOCHICHING IN NORTHEAST MINNESOTA COOK LAKE ST. LOUIS IN WISCONSIN THIS WATCH INCLUDES 7 COUNTIES IN NORTH CENTRAL WISCONSIN PRICE …

Alerts from the National Weather Service. For situational awareness only; always confirm against an official briefing.

SUPPLEMENTAL · nearest NWS station
WIND
Calm
no steady wind
VISIBILITY
10 SM
16.1 km
TEMP
21°C
NWS station
FORECAST & PILOT NOTES · SUPPLEMENTAL

Extended forecast and pilot notes

No aviation METAR is published for this airport. The nearest National Weather Service station reports visibility 10 SM, temperature 21C. Treat this as supplemental, not an aviation observation. Forecast suggests monday patchy fog then slight chance showers and thunderstorms, high near 75F, low near 57F, 38% chance of precipitation. Key risks: thunderstorms in the forecast.

PILOT WEATHER NOTES
Thunderstorms in the forecastWeather.gov
Monday: Patchy Fog then Slight Chance Showers And Thunderstorms. Watch for developing convection and plan alternates.
DayConditionsTemp FWindGustsPrecipPilot note
Monday Patchy Fog then Slight Chance Showers And Thunderstorms 75/57 NE 4 kt – 38% Thunderstorms in the forecast
Tuesday Sunny then Chance Showers And Thunderstorms 82/59 S 4 kt – 34%
Wednesday Sunny then Slight Chance Showers And Thunderstorms 87/62 SW 4 kt – 16%
Thursday Mostly Sunny 89/64 SW 4 kt – 45%
Friday Chance Showers And Thunderstorms 83/60 NW 4 kt – 27%
Saturday Mostly Sunny then Slight Chance Rain Showers 82/56 NW 4 kt – 22%
Sunday Sunny 81 SE 4 kt – 4%

Source: National Weather Service (office DLH). Forecast issued 0803Z.

AIR QUALITY

Air quality index

68 Moderate
Primary pollutant: PM2.5
Ozone 36 · PM2.5 68

Minnesota Arrowhead, MN · observed 2026-07-27 01:00 CST · Source: AirNow (US EPA). Air-quality data for situational awareness, not an official health advisory.

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-1216. Enter a runway number or heading to estimate wind components.
RUNWAYS

Runway detail & declared distances

1 runway

09W/27W
Dimensions
5,000 x 200 ft
Surface
Water
RWY 09W
Traffic patternRight
RWY 27W

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
1,765 ft MSL

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

DAYLIGHT & NIGHT

Sun & logging windows

Sunset
0147Z 8:47 PM
Sunrise
1032Z 5:32 AM
Loggable night
0224Z (9:24 PM local) → 0954Z (4:54 AM local)
end of evening to start of morning civil twilight
Position lights required
0147Z (8:47 PM local) → 1032Z (5:32 AM local)
sunset to sunrise (91.209)
Night passenger currency
0247Z (9:47 PM local) → 0932Z (4:32 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

Loon Lake Seaplane Base is in Grand Marais, Minnesota. Field elevation 1,765 ft MSL. Airport facts are drawn from OurAirports and the FAA NASR dataset.

OPERATIONS & CONTACT
OwnershipPrivately owned
UsePrivate use
TypeSeaplane base
ManagerJEFFREY W COLEMAN
Manager phone612-801-4000
CHARTS & AIRSPACE
ICAO / IATAUS-1216
SectionalGREEN BAY
Center (ARTCC)MINNEAPOLIS
Flight service (AFSS)PRINCETON
RegionMinnesota
CountryUnited States
Coordinates48.0758, -90.7065
Distance from city25 NM NW
SERVICES & LIGHTING
Control towerNon-towered
AIRCRAFT ACTIVITY

Traffic patterns

Aircraft activity data is not available for this airport yet.

NEARBY AIRPORTS

Nearby airports

KM56 Gunflint Lodge Seaplane Base
2 NM W
KCKC Grand Marais Cook County Airport
19 NM SE
0G5 Grand Marais/Cook County Seaplane Base
20 NM SE
80MN North Shore Health Heliport
24 NM SE
CKF5 Kashabowie/Upper Shebandowan Lake Seaplane Base
37 NM N
KELO Ely Municipal Airport
48 NM W
AIRPORT REMARKS

Operational remarks

›WE DO NOT OBJECT TO THE CONSTRUCTION DESCRIBED IN THIS PROPOSAL PROVIDED YOU AGREE TO THE FOLLOWING: THIS AERONAUTICAL STUDY DID NOT CONSIDER THE INTERACTION OF SEAPLANE OPERATIONS WITH SURFACE CRAFT TRAFFIC THAT IS REGULATED BY 14 CFR 91.115 NOR DOES IT GIVE APPROVAL FOR SEAPLANE OPERATIONS ON THIS BODY OF WATER. APPROVAL AUTHORITY IS VESTED WITH THE OWNER/CONTROLLING AGENCY OF THE BODY OF WATER. FOR THE ESTABLISHMENT OF AN ACCEPTABLE LEVEL OF SAFETY OF SEAPLANE OPERATIONS AT THIS SITE, REFERENCE FAA ADVISORY CIRCULAR (AC) 150/5395-1 -SEAPLANE BASES- (CURRENT VERSION). IT IS RECOMMENDED THAT YOUR SEAPLANE BASE BE CONSTRUCTED TO THE STANDARDS IDENTIFIED IN AC 150/5300-13. ALSO, A CLEAR APPROACH SLOPE, AS IDENTIFIED IN AC 150/5300-13, TABLE 3-2 -APPROACH/DEPARTURE STANDARDS-, SHOULD BE ESTABLISHED AT EACH RUNWAY END. IF THERE ARE OTHER OBSTRUCTIONS THAT PENETRATE THE APPROACH SURFACE, THEY SHOULD BE REMOVED OR LOWERED. IF THE PENETRATING OBSTRUCTIONS CANNOT BE REMOVED OR LOWERED, WE RECOMMEND THAT THE THRESHOLDS BE DISPLACED AND APPROPRIATELY MARKED, SO AS TO PROVIDE A CLEAR APPROACH SLOPE SURFACE TO EACH RUNWAY END. BE ADVISED, IN ACCORDANCE WITH 14 CFR PART 157, ANY CONSTRUCTION, ALTERATION TO OR ABANDONMENT OF THE SUBJECT AIRPORT REQUIRES NOTICE TO THE FAA FOR AERONAUTICAL REVIEW. NOTICE FOR THESE ACTIONS CAN BE GIVEN USING FAA FORM 7480-1, -NOTICE FOR CONSTRUCTION, ALTERATION AND DEACTIVATION OF AIRPORTS-...
›EMAIL ADDRESS: JWC@JWCOLAW.COM
OFFICIAL LINKS & SOURCES
↗Search NOTAMs (official FAA NOTAM Search)
↗US-1216 on OurAirports
FREQUENTLY ASKED
Does US-1216 have a METAR?
No on-field METAR is issued for US-1216. This page uses the nearest reporting station as a reference.
Does US-1216 have a TAF?
No TAF is issued directly for US-1216. Use the nearest TAF-issuing field as a planning reference.
What is the field elevation at US-1216?
US-1216 sits at 1,765 ft MSL, which factors into the density-altitude estimate on this page.
Is this an official preflight weather briefing for US-1216?
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.