This hazardous weather outlook is for extreme southwest Nebraska... northwest Kansas and east central Colorado. .DAY ONE...TODAY AND TONIGHT... A Dense Fog Advisory is in effect for Sherman and Cheyenne counties in Kansas through the mid morning hours. Visibility down to less than a half mile is expected, impacting area travel. Please use caution if out driving. A few isolated thunderstorms are possible late this afternoon and early evening for areas mainly west of Kansas Highway 25. Patchy frost is possible in portions of northeast Colorado after midnight tonight into sunrise. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY... Patchy frost is possible in portions of northeast Colorado into Wednesday mid morning. Elevated to near-critical fire weather conditions are possible Friday and Saturday for areas along and west of the Colorado border. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed, but any reports of reduced visibility would be appreciated, but please do so safely.