Yes, JSTOR is available to alumni! Please request access through this page. The Library will respond to your request and then you will receive an email from JSTOR asking you to complete your registration. As part of registration you will create a password, and from that point on you can access JSTOR directly by entering your email and password at https://www.jstor.org.
Your login will expire 365 days after registration; email the library directly to have it turned back on, and the password will remain unchanged.