Glenn, all,The hurricane could certainly have thrown up a lot of static, but I doubt that it would affect the strength of long haul LF signals. The elephant in the room was likely a big CME arrival in the mid-day on Saturday. Solar wind speed went way up for a while, bringing up the Kp Index, and having the other usual effects.
Transatlantic propagation at 136 kHz was a big topic 15 years or more ago, as for Amateur signals, we were dealing with very small signal to noise ratios in tight bandwidths. A difference of a few dB could take a QRSS signal from easy to "gone". On the other hand, when you are looking at LF BC carriers 20 or 30 dB out of the noise, you may be able to "see" them even when conditions are bad. One characteristic of these solar events is that weak signal propagation may be killed quickly, but recovery is slow.
Alan Melia, G3NYK, did a lot of head-scratching on the subject of solar influence on weak-signal LF propagation. While the issues were not totally settled, I'm comfortable that he was on the right track. I continue to monitor the Dst (Disturbance Storm Time) data from the University of Tokyo, and it does definitely correlate to LF propagation. I highly recommend a series of articles published by the RSGB, the first of which deal with HF propagation, and the last is on LF prop. Hopefully, this is the correct link:
https://rsgb.org/main/files/2012/10/Understanding_LF_and_HF_propagation.pdf
John, W1TAG