A Flash Flood Warning has been issued for the following counties in Missouri: Grundy, Grundy, Harrison, Linn, Mercer and Sullivan until 1:30 AM and the following county in Missouri: Grundy until 3:30 AM and the following county in Missouri: Daviess until 4:00 AM. A Severe Thunderstorm Watch has been issued for the following counties in Missouri: Caldwell, Daviess, Grundy, Harrison, Linn, Livingston, Mercer and Sullivan until 6:00 AM.