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Wed, 05/24/2017 - 11:28am

May 31, 2017
Contact: Deb Magaldi,
Ph. 757-269-5102

Jefferson Lab to Test its Tornado Warning Siren at 10:30 a.m. on Friday, June 2

NEWPORT NEWS, VA – The Thomas Jefferson National Accelerator Facility will conduct the monthly test of its tornado warning siren at 10:30 a.m. on Friday, June 2. 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 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 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 Communications Office at


The Thomas Jefferson National Accelerator Facility, or Jefferson Lab, is supported by the Office of Science of the U.S. Department of Energy. The 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 Jefferson Science Associates, LLC, operates and manages Jefferson Lab for the Office of Science.