The Marion County outdoor warning siren system will be tested this morning at 10am. This includes the entirety of Marion County with the exception of Pella. The sirens are usually tested on the first Wednesday of the month, but that falls when Knoxville will have guests from Nationals in town. As a reminder, the sirens this week will also go off for Severe Thunderstorm Warnings to provide more security for RAGBRAI campers.