Dangerous heat continues across portions of the Central and Southeast U.S. through July. Heavy rains, flooding, & severe weather are possible across the Plains & Upper Midwest to the upper Great Lakes tonight, with the heavy rain and flooding threat continuing through Friday. Tropical Depression 12W brings heavy rain to Guam & the Marianas through Saturday. Read More >
Explanation of Wave Height in the Nearshore Marine Forecast
Noticing this in our Nearshore Marine Forecast?
Thursday Southwest winds to 30 knots becoming northwest 15 to 25 knots. Snow likely during the day, then a chance of snow showers thursday night. Waves 5 to 9 feet subsiding to 3 to 6 feet. Waves occasionally to 11 feet. |
How is Wave Height measured? |
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Wave height is the vertical distance between the crest (peak) and the trough of a wave. Some other definitions: Still-Water Line is the level of the lake surface if it were perfectly calm and flat. Crest is the highest point on the wave above the still-water line. Trough is the lowest point on the wave below the still-water line. |
Typical Distribution of Wave Heights |
Explanation of the arrows being pointed to on the graph above:
For more information please see this link: Click Here |