This hazardous weather outlook is for extreme southwest Nebraska... northwest Kansas and east central Colorado. .DAY ONE...TONIGHT... Isolated thunderstorms are possible across the Tri-State Area this evening and going through the night. There is a marginal risk that storms may become severe for areas along and west of Kansas Highway 23. Possible storm hazards include large hail up to quarters in size, strong wind gusts up to 60 mph, and localized heavy rain. There is also a low chance for an brief tornado with severe storms along and west of the Colorado border as well within the region. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH MONDAY... There will be thunderstorm chances for much of the upcoming week, especially during the afternoon through overnight hours with some severe weather possible. The threat for locally heavy rainfall and potential flash flooding looks to be from Thursday night into Friday night, for those generally along and north of Interstate 70. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected to be required. Please send any storm reports to NWS Goodland.