WxDecoder

51MI Weather Cass Lake-Cove Island Seaplane Base

Pontiac, MichiganElevation 990 ftSeaplane base
OFF-FIELD REFERENCE
Nearest report: KPTK · 4 NM NW · 4 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 · KPTK
WIND
Calm
no steady wind
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 calm, visibility 10 SM, temperature 14C. Treat this as supplemental, not an aviation observation. Forecast suggests tonight partly cloudy then patchy fog, low near 46F, 2% chance of precipitation. Key risks: thunderstorms in the forecast.

PILOT WEATHER NOTES
Thunderstorms in the forecastWeather.gov
Thursday: Mostly Sunny then Slight Chance T-storms. Watch for developing convection and plan alternates.
DayConditionsTemp FWindGustsPrecipPilot note
Tonight Partly Cloudy then Patchy Fog 46 WSW 4 kt – 2%
Monday Patchy Fog then Partly Sunny 64/41 NNW 6 kt – 4%
Tuesday Partly Sunny 60/45 E 6 kt – 0%
Wednesday Partly Sunny 68/51 SSE 6 kt – 1%
Thursday Mostly Sunny then Slight Chance T-storms 72/52 SW 9 kt – 15% Thunderstorms in the forecast
Friday Partly Sunny 70/52 WNW 5 kt – 16%
Saturday Slight Chance Light Rain 68/54 SSE 6 kt – 24%
Sunday Chance Light Rain 66 SSW 8 kt – 42%

Source: National Weather Service (office DTX). Forecast issued 2357Z.

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 51MI. Enter a runway number or heading to estimate wind components.
RUNWAYS

Runway detail & declared distances

1 runway · longest 2,000 ft

09W/27W
Dimensions
2,000 x 100 ft
Surface
Water
RWY 09W
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
990 ft MSL

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

DAYLIGHT & NIGHT

Sun & logging windows

Sunset
2236Z 6:36 PM
Sunrise
1159Z 7:59 AM
Loggable night
2305Z (7:05 PM local) → 1130Z (7:30 AM local)
end of evening to start of morning civil twilight
Position lights required
2236Z (6:36 PM local) → 1159Z (7:59 AM local)
sunset to sunrise (91.209)
Night passenger currency
2336Z (7:36 PM local) → 1059Z (6:59 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

Cass Lake-Cove Island Seaplane Base is in Pontiac, Michigan. Field elevation 990 ft MSL. Airport facts are drawn from OurAirports and the FAA NASR dataset.

OPERATIONS & CONTACT
OwnershipPrivately owned
UsePrivate use
TypeSeaplane base
ManagerCONNIE HYNES
Manager phone231-844-2147
AttendedUNATNDD
CHARTS & AIRSPACE
ICAO / IATA51MI
SectionalDETROIT
Center (ARTCC)CLEVELAND
Flight service (AFSS)LANSING
RegionMichigan
CountryUnited States
Coordinates42.6161, -83.3560
Distance from city4 NM W
SERVICES & LIGHTING
Control towerNon-towered
AIRCRAFT ACTIVITY

51MI traffic patterns

2026-07-02 to 2026-10-15, 8 days observed · data 2026-10-23

Low confidence
TRAFFIC VOLUME (30-DAY)
AVG LANDINGS/DAY
0.3
AVG OPS/DAY
1.7
Activity trend over 3 days: flat, from 1 to 1 operations per dayOperations trend (3 days)

Busiest day: Mon · Busiest month: Sep

FLEET MIX
Piston single 78%Helicopter 22%

Mostly small piston aircraft.

TOP AIRCRAFT TYPES
›C172 (Piston single) · ~2 landings/mo
›AS65 (Helicopter) · ~1 landings/mo
›SREY (Piston single) · ~1 landings/mo
›PA12 (Piston single) · ~1 landings/mo
›UNKN (Unknown) · ~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

51MI has no on-field report. Nearest reporting station: KPTK (4 NM NW, VFR).

KPTK Oakland County International Airport
4 NM NW
VFR
KMTC Selfridge Air National Guard Base Airport
23 NM E
VFR
KYIP Willow Run Airport
24 NM S
VFR
KDTW Detroit Metropolitan Wayne County Airport
24 NM S
VFR
CYQG Windsor International Airport
27 NM SE
VFR
KFNT Bishop International Airport
27 NM NW
VFR
AIRPORT REMARKS

Operational remarks

›TAKEOFFS & LANDINGS RESTRICTED IN COES BAY; USE LARGE PORTION OF CASS LAKE FOR TAKEOFFS & LANDINGS; STEP TAXI PERMITTED IN COES BAY TO RAMP ON COVE ISLAND.
›FOR CD CTC DETROIT APCH AT 734-955-1404.
OFFICIAL LINKS & SOURCES
↗Search NOTAMs (official FAA NOTAM Search)
↗51MI on OurAirports
FREQUENTLY ASKED
Does 51MI have a METAR?
No on-field METAR is issued for 51MI. This page uses the nearest reporting station as a reference.
Does 51MI have a TAF?
No TAF is issued directly for 51MI. Use the nearest TAF-issuing field as a planning reference.
What is the field elevation at 51MI?
51MI sits at 990 ft MSL, which factors into the density-altitude estimate on this page.
Is this an official preflight weather briefing for 51MI?
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.