Many US bases have impressive gate guard parks, many of those are high quality and not inferior for official air force museums! Most probably, this B-47B is wearing false serial 20271 and is believed to be 51-2315. Thje latter was in a major accident prior to 1968. 52-0271 was indeed at Bunker Hill AFB (later Grissom AFB), and maybe this plane is actually the real 52-0271? The plane currently bears the markings 12135 and a sign says that the plane broke its back on a hard landing at Bunker Hill AFB, which forced its retirement, so it may well be the real 51-2315.
34 B-47E bombers were converted for weather reconaissance work in the early 1960s. They carried no armament, an instrument pod in the bomb bay and cameras in the nose to photograph cloud formations. The WB-47Es were retired in the fall of 1969.
This B-47 was built at Tulsa and TOC by the USAF in May 1955 serving initially with the 301st Bombardment (Medium) Wing (Strategic Air Command) at Barksdale AFB, LA. It was retired in June 1964 before going on display at the SAC Museum at Offutt AFB and moving to the new premises at Ashland in 1998.
This B-47 was stationed at Bunker Hill AFB (now Grissom AFB) when damage from an extremely hard landing caused it to be declared a write-off and retired. Fortunately, especially as it is a rarer B-version, the frame was not scrapped and is now on display at the super Grissom Air Museum.