NDBC station · fixed platform
Station LPNM4: 9075065
Alpena, MI. 45.063°N 83.429°W · Presque Isle Light to Sturgeon Pt MI Including Thunder Bay National Marine Sanctuary
- Wind
- S 6 kt, gusting 10
- Water
- 64°F
- Air
- 72°F
- Pressure
- 1016.3 mb
Reported 39 min ago · National Data Buoy Center, station LPNM4
A buoy reading is not a go/no-go
LPNM4 measures the water. It does not know your boat. Fifteen knots and three feet is a pleasant afternoon on one hull and a beating on another, and the difference is the two or three numbers you already carry in your head. GoNoGo Weather scores this station and the forecast around it against your own limits and gives you one straight answer, with the hour it changes.
Score LPNM4 against YOUR boatFree, no card required.
How to read station LPNM4
This is a fixed station: a platform or a shore mast. It reports wind, pressure and temperature reliably and usually carries no wave sensor, so seas here come from the model rather than from an instrument.
Period matters as much as height. Four feet at ten seconds is a long, easy swell; four feet at four seconds is a short steep chop that stops a boat. Wind against tide steepens everything, and a buoy cannot see that from where it floats. Age matters too: stations go quiet, and a reading that has not updated in three hours is history rather than weather.
This station sits in the NWS marine zone Presque Isle Light to Sturgeon Pt MI Including Thunder Bay National Marine Sanctuary (LHZ348), which is the forecast we read alongside it.
Nearby stations
This is a read of official forecasts and observations, not a guarantee. You know your boat and your crew. The call is yours.