Will taking a temporary staff position between post-docs end my academic (tenure track aspirations) career I recently was given a job offer for a ([edit] research support/IT support) staff position at a university in a city I have been trying to relocate to for family reasons but I am concerned that if I take the position any chance I have of getting a tenure track position will be over. My background is in computational physics and I have a successful post-doctoral appointment currently (multiple first author manuscripts in some high impact journals within the short time, 1 year, I have worked), but the location is not-ideal for personal reasons. 

My question is: if I take this job will it look poorly on tenure track applications? If it helps the position is fixed-term and much better pay than my current post-doc. I have always been told in graduate school that if you get off the tenure path, you can't get back on.

EDIT: I should note that the IT position is listed as a Research position, where I will be providing research support for the supercomputing center by leading/developing workshops, presenting work at HPC conferences, and still writing manuscripts (just in more of a CS/IT domain instead of physics) and the position is only for about 4.5 Months. Didn't know if that would change anyone's responses, but thought I should clarify that it is not help-desk/sys. admin work.
I would think it's not advisable to take this position unless you already have a research position lined up for a local university in the near future (under a year at least). At least in my field, getting tenure anywhere at all is hard. Unless you are particularly in demand (which seems unlikely from your described position so far), if you want tenure you have to put that above location (even to some extent country, not just city), and then apply at every opportunity to move to something where you want, in the hope that one day you will get it. It's not a good situation, but there are too many people for the number of jobs available.