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I recently wrote a #GreatLakes tweet discussing the distinction between storm surge and seiches, following a huge surge on LakeErie. I was asked if a seiche was to follow, but the answer caught me off guard: #LakeErie may have huge storm surges, but it has a weak seiche game!

I’ll reiterate: storm surge refers to water stacking up at one end of a lake during a large wind event; seiches are periodic sloshing of water back and forth in a basin. Seiches frequently follow storm surges, but they are separate phenomena resulting from distinct physics.

While I study lake physics in general, the system I’m most familiar with is the #GLOAT, #LakeSuperior. Seiching activity is ubiquitous in Lake Superior- it’s hard to look at a record of lake level without seeing the characteristic, eight-hour oscillations.

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Lena Guerrero Reynolds

@LenaGReynolds

Pretty excited, I’m taking the train from Chicago to Kalamazoo to visit a friend this weekend. First time taking my bike on @Amtrak #bikechi ➡️ #bikezoo

@cta

Journey started on the @cta blue line from Jeff park. I forgot how many stairs there were at the Clinton stop lol (4 flights!) but there’s a nice bike path for the last couple blocks to union station!

Arrived early just in case, and got a little ticket for the bike. They announced a delay but then the line started moving and we ended up leaving pretty much right on time anyway! So far so good 😊

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GAVNet

@GAValueNetwork