Jira Priority Change
It took a while to find where to add a priority so here is the partial link:
https://YourSubDomainHERE.atlassian.net/secure/admin/ViewPriorities.jspa
Replace your subdomain and you should be able to add any priorities you want.
I have a ‘ColdStorage’ priority for items that have been looked at, and may be done by anyone with spare time.