Arya and the Brave Companions are on their way to Riverrun to deliver Arya to her mother. They camp at the top of that hill where that old lady appears and makes predictions.
I am no good at interpreting this stuff. Other Kindle users have higlighted a passage that is presumably very meaningful. The howling wolf is probably Jon's wolf, who probably is wondering where Jon went since wolves can't scale 800 foot walls. The jangly bells are probably Dany's, but why are they sad? I've got no idea who Medusa represents: possibly Ygritte is going to be really cross with Jon.
The old woman talks to Arya and turns into Madame Trelawney predicting Harry Potter's death. But she does usefully tell them that Catelyn is leaving Riverrun to go to the Twins for a wedding, which we know is true. And in plain English, too, so that was helpful.
On the ride the next day Arya learns more than she wanted to know about her dad's romantic interludes. Apparently Jon Snow's mum is called Wylla, who was Ned/Edric Dayne's wet nurse. And that affair caused Lady Ashara Dayne to throw herself off a cliff, since Ned Stark and Ashara were in love. Harwin says that was before he was engaged to Catelyn, though. But we know he fathered Jon after his marriage to Catelyn. So the timeline is a bit complicated.
The storm comes and they shelter in an abandoned village. This must be the same storm that Bran and Jon are sheltering from. Either it's a big storm or it is moving south. Either way I like that it is anchoring the various characters in time and place, the way Tolkien does with the moon phases. Presumably it is the titular storm.
The village is abandoned because Arya's granddad Hoster (who just died) set it alight during the war between Mad King Aerys and Robert Baratheon. This is a hint that the winners of that war (including Arya's family?) weren't necessarily good guys.
Thoros looks into the flames and sees Lannisters attacking Riverrun. Now Beric wants to go back to Acorn Hall and hang out while he scouts Riverrun to see if it's safe. Arya doesn't like the sound of this and does a runner. Straight into the arms of the Hound. Oh dear, will she *ever* get home?