Mesoscale Discussion 1948 NWS Storm Prediction Center Norman OK 0730 AM CDT Wed Aug 12 2026 Areas affected...parts of central/south central Iowa Concerning...Severe Thunderstorm Watch 573... Valid 121230Z - 121430Z The severe weather threat for Severe Thunderstorm Watch 573 continues. SUMMARY...Thunderstorm activity spreading across the Missouri River continues to generally weaken, but renewed intensifying thunderstorm development still appears possible near the I-80 corridor of central Iowa through 9-11 AM CDT. If this occurs, it could pose a risk for severe hail and damaging downbursts. So, renewed intensifying thunderstorm development still does not appear out of the question into and across the Des Moines area through mid morning.