A TRACON Controller reported they vectored an aircraft below the Minimum Vectoring Altitude.

Narrative

I was vectoring this aircraft from the southeast quadrant of our airspace to the RNAV Y XX approach at ZZZZZ; or inside of it to avoid weather build ups to the north west of the airport. Several center weather advisories had populated about the thunderstorm buildups near final for runway XX and I was attempting to vector the aircraft to the final portion of the RNAV Y XX approach to avoid the possibility of them entering that storm system where tornadoes; 4 inch hail and 60kt gusts have been reported. The MVA the aircraft was mostly in was a 5200' MVA with a 6000' and 6100' MVA to the northwest that exists for 2 free standing antennas. I had the regional jet in question descend to maintain 6000' and was aware of these MVA's; also attempting to sequence the arriving Aircraft Y in trail of the regional jet for the same approach to the same runway with plenty of space in the event of a needed heading deviation; a go around; etc.I do not know for sure; but I believe I may have clipped the edge of the 6100' MVA with my regional jet while turning him to base for the RNAV Y XX Approach. Given the winds were roughly 100 at 20 G 30 and both pilots had reported they wanted to attempt the RNAV Y XX approach inside of ZZZZZ1 (the straight in fix) there really wasn't more I could do for positioning the aircraft. The storm itself was blowing northeast and I believed it to be encroaching more on the east side of the approach profile than the west side; so I believe my choice for arriving was sound. I believe that with the weather on the scope and my focus with keeping Aircraft Y far enough in trail that I wouldn't need to extend him to follow the regional jet ahead of him for compression on final for runway XX that I just didn't issue the instruction to turn the RJ (Regional Jet) soon enough. I believe I needed to act sooner but was focused on having the in trail spacing needed for the Aircraft Y and didn't issue the instruction to the leading RJ soon enough to keep it totally away from the 6100' MVA while level at 6000'.