This hazardous weather outlook is for extreme southwest Nebraska... northwest Kansas and east central Colorado. .DAY ONE...TONIGHT... A few strong to potentially severe thunderstorms are possible this evening. Hail up to the size of quarters and wind gusts up to 60 MPH may occur with the strongest storms. Torrential rainfall leading to flash flooding may occur with any thunderstorm activity tonight. However, the greatest threat for flash flooding is in the Flash Flood Watch across far eastern Colorado. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH MONDAY... There is a Marginal outlook for severe storms Tuesday and Wednesday during the afternoon and evening hours. Locations west of a Goodland to Trenton, Nebraska line are favored for severe weather Tuesday evening. Locations generally along and north of Interstate 70 have a Marginal Risk of excessive rainfall that could produce flash flooding or flooding of low lying and poor drainage areas. Most of the forecast area may see severe weather Wednesday evening. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed. We would appreciate any reports of severe weather and flooding via telephone and social media.