A severe thunderstorm warning is in effect for Montgomery and Page counties in Iowa until 6 p.m. Sunday.
Douglas County usually tests the tornado sirens the first Wednesday morning of the month; however, this month we may hear the sirens a few extra times.
Officials warn the public may hear short tones from individual sirens during regular business hours, 8 a.m. to 5 p.m., throughout the month.
Specific dates for testing were not released.