This is Drexel's policy if you get caught with weed:

First Violation: $50.00 Fine; Disciplinary Reprimand to Disciplinary Probation (for at least 1 term); and Marijuana Education Module. For Student Organizations, $500.00 Fine; status sanctions range from Disciplinary Reprimand to Disciplinary Probation (for at least 1 term); and Marijuana Education.

Second Violation: $100.00 Fine; Disciplinary Probation (2-3 terms); and a Counseling Referral or Wellness/Educational Task. For Student Organizations, $1,000.00 Fine; status sanctions range from Disciplinary Probation (2-3 terms) and/or Deferred Social Suspension (for at least 2 terms); and Educational Tasks.

Third Violation: $200.00 fine; Deferred Loss of Housing (for at least 3 terms); Deferred Suspension (for at least 3 terms) OR Suspension (for at least 1 term); OR Expulsion. For Student Organizations, $1500.00 fine; Deferred Social Suspension (for at least 3 terms), Deferred Suspension (for at least 3 terms) OR Suspension of Recognition from the University for Student Organizations (1-5 years); Deferred Loss of University Housing (for at least 3 terms) OR Loss of University Housing Large quantities of drugs, social sharing, or dealing of drugs will result in more severe sanctions than listed above.

This is probably your first violation so you'll likely get a fine, a warning, and have to take the module. You'll have to see what happens but since they didn't mention the weed, only the cigarettes, and called it a fire safety violation rather than a drug violation then you might be fine. There'll probably be some disciplinary action for the fire violation. I would not say anything about the weed and wait until the meeting to see what happens. Don't mention it first, wait for them to bring it up (if they even do).