SE may have used gem. numerology to discover the above date. Now for those who follow the Prophecies of Pedro Regis.

Philadelphia

#2821- Those who dwell in Philadelphia will live moments of great difficulties. Terror will come. Poison will spread and will contaminate many of My poor children.


Arizona

# 2541- A fire will fall in Arizona. A man will be taken without consent and many will weep and lament

Tampa

#2749 Terror will come to Tampa and Tumbes. Pray.


So is Philly targeted? The home of the Constitution and Liberty Bell? Will it be Biological? Is there a lab in NJ missing some vials? But Why Tampa? Arizona? Is it Phoenix?
SE never came back yet based on the past posts it appears OPs clues led to Philly.

Link [link to www.sign.org]

Did OP mean to use the clues to decipher the numerology? Or is this a coincidence?