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Great Lakes Product Viewer

Due to ongoing testing and resource constraints, the GFS-Wave website graphics may be slow to update from time to time. We apologize for this inconvenience.

Operationally generated graphics of the wave fields (no spectra or source terms) are available from Model Analyses and Guidance.

Bulletin files are available from the Production FTP server. Look for gfs.YYYYMMDD/CC/wave/station/bulls.tCCz/gfswave.stationID.bull


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Significant Wave Height
Wind Sea Wave Height
Primary Swell Wave Height
Secondary Swell Wave Height
Tertiary Swell Wave Height
Wind Speed and Direction
Peak Wave Period
Wind Sea Period
Primary Swell Period
Secondary Swell Period
Tertiary Swell Period
Great Lakes (NDFD winds) (Latest run) 2021/10/05 18z
Peak Wave Period and Direction forecast for Hours
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About this product:

The peak period identifies either the period (the time between waves) associated with the locally generated wind sea (in cases with strong local winds) or the dominant wave system (swell) that is generated elsewhere. Note that this peak period field shows discontinuities. These discontinuities can loosely be interpreted as swell fronts, although in reality many swell systems overlap at most locations and times.