Jefferson Lab Tests 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 11. This test is being conducted as part of the Tornado Drill being sponsored by the Virginia Department of Emergency Management.

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

The test will be carried out over a period that will last 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

Jefferson Lab is one of dozens of businesses and institutions across Hampton Roads that is participating in the statewide tornado drill. For more information about the state-wide Tornado Drill and tornado preparedness and response, visit:

More information about VDEM and emergency preparedness is available at:


Jefferson Science Associates, LLC, manages and operates the Thomas Jefferson National Accelerator Facility, or Jefferson Lab, for the U.S. Department of Energy's Office of Science. JSA is a wholly owned subsidiary of the Southeastern Universities Research Association, Inc. (SURA).

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