CEDAR RAPIDS, Iowa (KCRG) – Scattered shower and storm chance increase tonight. Your First Alert: Strong to Severe Storms Possible. The first round of wet weather arrives tonight, likely after Midnight, and slowly spreads from west to east. Some embedded thunderstorms are possible within this rain, though the risk for strong to severe storms looks fairly low during this time frame. Instead, occasional moderate to heavy downpours are possible, with some thunder and lightning.