My buddy just got this. He moved about a year ago but I'm not more than 5 minutes from the cross streets listed.

Just got a reverse 911 call and the following email: This is Weld County 911 with an emergency message for Weld County Sheriff's Office. There is police activity in the Arbor Dr and 29th Avenue area. Please stay in the low part of your house. We will notify you when police activity is complete.
I'm guessing it's a hostage situation. I'll let you know if rounds start coming through the house.