On the next rain forecast:
On Saturday evening (Eastern), there will be two rain systems, one over Montana and the Dakotas, and the other over Colorado and Arizona, which will be moving toward each other.
There are two scenarios that could happen:
Scenario 1: The two systems fuse together into a powerful storm over Nebraska and South Dakota early Monday morning. It will cross over the Midwest on Monday and reach us by Tuesday.
Scenario 2: The two systems stay away from each other. The Arizona/Colorado system eventually reaches us on Wednesday.