What is undertow in a lake?
What is undertow in a lake? Undertow is a natural and universal feature for almost any large body of water; it is a return flow compensating for the onshore-directed average transport of water by the waves in the zone above the wave troughs.
What does a riptide feel like?
Rip currents do not pull people under the water; they pull people away from shore. The rip current is typically the strongest about a foot off of the bottom, which can cause your feet to be knocked out from under you making it feel like something under the water was pulling you.
What does it mean to swim with an undertow?
Myth: Rip currents, rip tides, and undertows are all the same thing. Fact: While neither rip currents or undertow will pull a person underwater, undertow is a term used to describe the current beneath the surface when waves are breaking upon the shore (see glossary of rip current terms).
Do rivers have undertow?
Undertows happen when friction at the river's bottom causes currents to slow down. At the water's surface, the current is still moving fast, and the water turns into a corkscrew pattern at the junction of the two currents. The water's swirling motion is severe in a large river like the Mississippi.
Can there be an undertow in a lake?
You may have heard about the rip tide or undertow before. These are terms that people commonly use to describe dangerous currents. However, since there are no tides in the Great Lakes (needed to form a rip tide) and currents don't pull a person down under the water (undertow), they are a bit inaccurate.
Why is Lake Michigan so blue?
The blue in Lake Michigan and Lake Huron is sediment brought to the surface when strong winds churned the lakes. The green in Lake Erie and in Lake Huron's Saginaw Bay is algae, which builds on the surface when winds are calm.