Having lived here in Pittsburgh all my life, I'll tell you we have hills. Lots and lots of hills. We only get a few bad winter days, but it only takes sliding on slippery roads for less than a minute to bust up a vehicle.
That said, get a set of 4, "Michelin Cross Climate 2" tires, or if you can find them in that size get the recently released Michelin Cross Climate 3. Fantastic all season tire that drives like dedicated winter tires in snow and ice, they plow water out from under like crazy in big rains on highways to find great grip on the road, and wears like iron. People in other states brag about having put 60,000 miles on them and they still have enough tread to go more. You won't get that out of any tire in Pittsburgh. The stop and go and climbing up and braking while going down hills shortens tire life here to about half what other areas get.
I have sets of 4 of the 2's on my 2016 crv and my sisters 2018 crv ( she also lives in Pittsburgh ), and they perform great all year around.
They are expensive, but worth every penny. Great tire.
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BTW, if she's new to Pittsburgh, tell her that on the rare occasions when theres a really bad rain storm, avoid the bottom of valleys. They still ocasionally flood from all the runoff from the hill. Where 51 meets 88 gets it and 88 near that intersection also gets flooded. Sometimes by the exit of the liberty tunnel on the outbound ( away from Pittsburgh ) side, and theres a few others.
Also, dont live at the bottom of a mountain in a valley. Theres a reason those houses that regularly flood are so cheap to buy or rent. It ain't worth the hassle of getting flooded out. But people still fall for those low rent and low cost houses. If theres a stream near by, think about where all that water is going to go when it turns into a raging river with all the runoff from all the hills.
People getting flooded out is nothing new when seen on the local news. There are only a few areas like that, but it does not take a rocker scientist to figure out not to live there.