Now Monday morning, 1500 UTC, and I see these signals are back in normal numbers.
10800 to 11300 I see a couple per minute, 14600 to 15000 I see maybe 6 to 8 per minute, 16800 to 17200 I see maybe one every 20 seconds, 23050 to 23250 I am seeing a couple per minute, 28000 to 29000 I see dozens per minute, 37250 to 37750 I see 8 or 9 per minute. I do see them in a few other frequency ranges, but those seem to be the most consistent.
I have scheduled 2 recordings a day to try and see if there is a daily cycle involved (i.e. was Sundays absence real or not). I have a 1 MHz wide chunk of spectrum centered on 14500 and 28500 kHz scheduled for 1 minute every day at about 1500 UTC. If I get around to it I want to log the number of sweepers seen in that 1 minute / 1 MHz chunk daily to see what the trends are.
As for Jupiter as a source, I think probably not. These signals do not match either L bursts or S bursts from Jupiter. They are too fast and narrow banded for L bursts, and the bandwidth is right for S burst but they are too slow.
Also, these signals do not seem to have any timing in common for when Jupiter is above the horizon or not. I would think that if they were from Jupiter they would be more likely to be seen when Jupiter is above the horizon, and less when it was below, instead these signals seem to be tied to propagation conditions, strongly suggesting, to me, that they are terrestrial. I would think that the same factors that make propagation good (radio wave reflections off charged portions of the ionosphere) would also make those bands less likely to show Jovian noise, since the signal from Jupiter would have to penetrate that layer.
(edit) Interesting, in setting up the recordings I decided to use a directional antenna. I found that the 10 meter sweepers are mostly coming from a different direction than the ones near 20 meters.
T!
