Biloxi - Hurricane/Tornado Sirens - Steady High Low

I filmed this video in 2018 while setting up meteorological instruments and video equipment with Mark Sudduth w/HurricaneTrack.com ahead of Tropical Storm Gordon.
‪@hurricanetrack‬
Siren Model: Whelen Vortex R4
Signal: Steady High Low
Location: Biloxi, Mississippi in Harrison County
Camera Model: Apple iPhone
My email and social media links can be found here: www.derek605wx.com
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Copyright © 2018 Derek Thompson
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[@Soccerdude7330Official]

0:45 Sounds like it had a little trouble...

[@garyhisgun4996]

Whelen Vortex or Whelen WPS 4004 in HI Low

[@warningsirensofpaandny1918]

ur forgetting the whelen hornet

[@aliultimate009]

The High-Low signal was used here for imminent danger correct ?