Severe Thunderstorm Watch means severe thunderstorms are possible, continue activities and monitor the situation.

Severe Thunderstorm Warning means severe thunderstorms are imminent.

  1. Keep people indoors and away from the windows, until the severe storm passes. If you are outside, seek shelter immediately.

Tornado Watch notification is issued when atmospheric conditions are favorable for the formation of tornadoes in a given area. Under watch conditions stay informed by listening to radio or television.

Tornado Warning notification indicates that a tornado has been sighted and poses a definite threat to a given area. If the warning is for your area you should take shelter immediately!


  1. Outdoor sirens will sound for a period in excess of approximately three minutes. When you hear the sirens seek shelter first, then seek more information through the Purdue ALERT layers including local radio and TV stations to determine the nature of the emergency.
  2. The ALL CLEAR signal is announced by radio and television stations. The sirens remain silent.


All Tippecanoe County sirens to include the sirens located at Purdue University are tested at 11:00 a.m. on the first Saturday of every month except during periods of adverse weather conditions.


  1. Move to the pre-determined shelter location as designated in your Building Emergency Plan.
    1. The shelter location is normally, the basement, sub walk or lowest level of the building away from windows and exterior doors.
    2. Interior hallways and restrooms on the lowest level offer the next best shelter.
      • Be prepared to kneel facing the wall and cover your head.
  2. In a high-rise building, vacate the top floors and move to a lower floor or basement.
    1. If not able to reach the basement, go to an interior room, hallway, or restroom with no windows on the lowest floor possible.
      • Be prepared to kneel facing the wall and cover your head.
  3. If time permits, occupants of wood-frame or brick buildings with wood floors should leave the building and go directly to a more substantial concrete building, preferably with a basement.
  4. Share notification with others; assist persons with disabilities, if possible.
  5. Try and obtain additional clarifying information by all means possible (e.g., Purdue Campus Emergency Status Webpage, TV, radio, text message, email, etc.)
    1. It would be useful to have a cell phone, hard-wired telephone, or computer system in the shelter location to assist in obtaining additional information as well as being able to report any life-threatening conditions.
  6. If in a vehicle, get out and seek sheltering a sturdy building. If a building is not available, lying flat in a depression such as a ditch or ravine offers some protection. Be aware of potential flooding.
  7. Watch out for flying debris; do not call 911 unless you require emergency assistance.