Outdoor Warning Systems
Emergency Warning Signals
A three to five minute wavering sound is used to warn persons that a tornado warning has been issued. Selected sirens with voice capability will make a verbal announcement that a tornado warning has been issued followed by a three minute wavering tone.
If severe weather is occurring, take cover at once. Again, listen to a local radio or television station for information. Remain in shelter or protected area until danger is over.
When the Sirens Sound
Do not use telephones! Do not dial 9-1-1! Turn on your radio or your television to a local station to receive information or instruction. Follow instructions issued by the media from the Emergency Operations Center.
A steady blast of three to five minutes means an emergency exists requiring immediate notification. Turn on your radio or your television to a local station for information regarding the emergency (this may involve such things as evacuation of an area, or taking immediate protective shelter or cover). Selected sirens with voice capability will make a verbal announcement regarding the type of emergency.
If evacuation is necessary due to hazardous materials incidents, floods, etc.; evacuation directions and other necessary information will be broadcast over local radio and television stations.
Note: siren tests are conducted weekly.
DeSoto County, The City of Hernando and the Town of Walls are tested at noon on Thursday.
The City of Horn Lake, City of Olive Branch and the City of Southaven conduct tests at noon on Saturday.
The sirens will not be tested during periods of inclement weather. If they should sound at any other time, a possible emergency exists and the above instructions should be followed.