A growing complex of strong to severe thunderstorms is expected to move generally southeastward across the watch area
through this evening, offering occasional damaging gusts and isolated severe hail. Severe-storm potential becomes more uncertain into central/southern Iowa later tonight; for now, the watch extends to just south of the I-80 corridor.
Primary threats include, isolated damaging wind gusts to 70 mph possible and isolated large hail events to 1.5 inches in diameter possible. This severe thunderstorm watch will be in effect until 1am.
A Severe Thunderstorm Watch means conditions are favorable for severe thunderstorms in and close to the watch area.
Persons in these areas should be on the lookout for threatening weather conditions and listen for later statements and possible
warnings. Severe thunderstorms can and occasionally do produce tornadoes.