cooler water. you're going to notice it going from a category 4 down to a 2 and eventually crossing california as a tropical storm. the main concern really isn't wind. it's going to be the rainfall. we've already started to see those bands creep in. more of that heavy rain really sets in later this evening and overnight. it will continue pretty much nonstop throughout the day sunday before finally seeing the bulk of that moisture retreat once we get into the latter half of the day monday. you're talking a good 48-hour time period of very heavy rainfall. that's why there is a very high risk of flash flooding in death valley down into southern california, las vegas, los angeles and san diego also looking at a moderate risk of heavy rainfall. most areas 2-4 inches widespread, but some of these areas could pick up as much as 10 inches of rain this weekend. >> that's a lot of rain for a region that is not used to that much precipitation.