Here's why you might here outdoor sirens in Hennepin County on Monday, April 15

PLYMOUTH, Minn. (FOX 9) - You may hear outdoor tornado sirens in some Hennepin County communities Monday afternoon. Here's why.

Hennepin County Emergency Management (HCEM) on Monday said at 1 p.m. it will be conducting siren maintenance and growl testing in the following communities:

• Brooklyn Park

• Champlin

• Crystal

• Dayton

• Eden Prairie

• Edina

• Greenfield

• Long Lake

• Medina

• Orono

• Plymouth

• St. Anthony

• St. Louis Park

According to the HCEM, "Each month growl testing occurs after the monthly siren test to select sirens that need further testing."

Typically, the monthly siren tests happen at 1 p.m. on the first Wednesday of each month.