I had a search for Claudia but couldn't find her, except on the 1940 census at Manhattan, which I see you already have. From what I see on your public tree, you don't seem to have the 1930 census. I think that is because the Powell family are listed under PAUL (would you believe!)
Church Street, Nanticoke, Luzerne, Pennsylvania
Fred Paul 35 b Wales Arrived USA 1924 Miner b 1895
Eunice Paul 25 b Wales To USA 1926 b 1905
Gordon Paul 2yrs 4 mths b Pennsylvania
Stanley Shepherd 32 Brother in Law b Wales Labourer Mines
Joe Troe (Boarder)
Eunice and Gordon arrived Southampton fron New York on the MAURETANIA
Eunice Powell 26
Gordon Powell Infant
They were going to: 186 Marine St, Cwn, Monmouthshire.
I think it was a short visit. I think I noticed them going back, but I thought you might like to see that address.
There is a death record for a Eunice Powell but I am not certain it is her.
Last res: 08401 Atlantic City, New Jersey.
Born 8 May 1901
Died Jan 1975