I know crappies and eyes turn on from dusk on in open water so I don't see why it'd be any different thru the ice. ith the snow on top tho, if you get a cloudy day you should do well all throughout the day.
I fished Split Rock last winter for crappies and as soon as it started getting dark flags started flying. Didn't ice anything but must have had 20 flags in 45 minutes, all with baits suspended about 3-4 feet under the ice.
I also know in targeting crappies in my private lake in PA, for about 45 minutes to an hour after sunrise the crappie bite is really on and then dies after that unless its cloudy.