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Joe Mason @moreorloess.bsky.social

Diurnal cycles of temperature in a small, shallow stream, across Lake Mendota from Madison, also with a decline in both min and max temperature in the past week.

aug 30, 2025, 2:28 pm • 9 0

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Colton the fish squeezer🐟🪴📚🏕️🐝 @fishsqueezer.bsky.social

I'm glad it's cooling off somewhere, here in the PNW we're supposed to get our hottest temperatures of the year next week. I'm NOT looking forward to it.

aug 30, 2025, 2:55 pm • 1 0 • view
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Andrea Matranga @andreamatranga.bsky.social

The daily min looks very out of scale with the rest of the oscillation

aug 30, 2025, 2:34 pm • 2 0 • view
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Joe Mason @moreorloess.bsky.social

There are spikes in both directions. Not sure what the cause is but it looks like they're filtered out before calculating daily max and min.

Plot of instantaneous water temperature measurements on Dorn (Spring) Creek near Waunakee, Wisconsin for several days in August. Short-lived spikes of high and low temperature are visible. Daily minimum, maximum, and mean temperatures for the same stream over a bit longer time period.
aug 30, 2025, 2:50 pm • 1 0 • view
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Joe Mason @moreorloess.bsky.social

Probably there is a USGS document on standard water temp methods that explains this.

aug 30, 2025, 2:59 pm • 2 0 • view