Jefferson Lab to Test its Tornado Siren at 9:45 a.m. Tuesday During State-wide Tornado Drill

NEWPORT NEWS, Va. – The Thomas Jefferson National Accelerator Facility will sound its tornado warning siren at 9:45 a.m. on Tuesday, March 17. This test is being conducted in conjunction with the statewide Tornado Response Drill being sponsored by the Virginia Department of Emergency Management.

Depending on weather conditions at the time of the test, the siren may be heard by anyone within a 1.5-mile radius of the lab.

The test will be carried out over a period that could last up to three minutes. The test will be of the wavering tone (also called high-low-high or 10-4-10).

Jefferson Lab uses the siren to quickly alert members of the lab community who are outdoors to "take cover" in the event of tornadoes and tornado warnings in the immediate vicinity of the lab.

Questions about Jefferson Lab's tornado siren may be directed to its Public Affairs office at

For more information about the statewide Tornado Drill and tornado preparedness and response information, visit:

More information about VDEM and emergency preparedness is available at:


Jefferson Science Associates, LLC, a joint venture of the Southeastern Universities Research Association, Inc. and PAE, manages and operates the Thomas Jefferson National Accelerator Facility, or Jefferson Lab, for the U.S. Department of Energy's Office of Science.

DOE’s Office of Science is the single largest supporter of basic research in the physical sciences in the United States and is working to address some of the most pressing challenges of our time. For more information, visit