Flash Flood Warning issued September 28 at 11:42PM MDT until September 29 at 4:00AM MDT by NWS Salt Lake City UT
At 1142 PM MDT, trained weather spotters reported thunderstorms producing heavy rain in upper headwaters of the Paria River downstream to the Arizona border and Wahweap Creek to its terminus in Lake Powell. Flash flooding is already occurring. HAZARD...Life threatening flash flooding. SOURCE...Trained spotters reported a very large flood wave moving down Wahweap Creek toward Lake Powell near the town of Big Water…