The National Weather Service Explains the โ100-Year Floodโ Phenomenon Been hearing a lot about โ100 Yearโ flood lately? Are you confused as to what that means? The NWS Missouri Montana have made a graphic in hopes of clearing it up. An example to put it into perspective: on the evening of Friday, May 11th, the Clark Fork above Missoula reached 13.82 feet (32,500 cubic feet per second). That level [โฆ] Weather WeatherBrains | May 18, 2018 0 Comments