The Annual Nenana Ice Classic is Over for Another Year

After an initial movement 2 days ago an ice-jam prevented full movement of the tripod and the clock was not stopped. However, the Tanana River officially broke up on April 24th at 2:25 P.M. Alaska Standard Time.


Tripod moved but not moving

Not free of ice but no more tripod:

So how does this extended date fit in with previous data.

2 plots
one timed from start of year

this one timed from vernal equinox

Seems to be following a declining period with a few early peaks