The extreme weather also the story some 1,100 miles east of there in colorado this evening. Something we never thought we'd see. Look at this. Is it really a summer storm? Sag staggering hail in... See More
The extreme weather also the story some 1,100 miles east of there in colorado this evening. Something we never thought we'd see. Look at this. Is it really a summer storm? Sag staggering hail in august, snowplows out in force. And ginger zee here with the imanls and the next threat on the way this weekend. Hail, and water. Reporter: So much hail and so much water, filling the streets of colorado springs, growing to golf ball size near denver. Hail, halting traffic, closing several roads, filling cars and yards and plows. Yes, plows busy clearing it all. Then there was this on a colorado highway. You can't see. A couple trying to get home. Reporter: More than four inches of rain falling in just over an hour. It's still not letting up. And tonight flash flooding in idaho, more than an inch of rain in less than 45 minutes. Ginger zee is with us now. You say more rain this weekend and potential for more flooding? Yes and I have to introduce you to tropical storm ivo. This will be the culprit. The desert and southwest will get hits by chunks of the tropical moisture, not actually the storm itself. That's a different computer model from the past. I want to show you how much rain we're talking. Some of the models are printing scary numbers, anywhere from las vegas to phoenix. You see that bull's eye of two to three inches, could be localized flooding as a big issue going into sunday and monday.
This transcript has been automatically generated and may not be 100% accurate.