This hazardous weather outlook is for extreme southwest Nebraska... northwest Kansas and east central Colorado. .DAY ONE...TODAY AND TONIGHT... Triple digit temperatures will encompass the entire area today. Heat indices of 105 to 110 degrees are forecast across Red Willow, Decatur, Sheridan, Gove, Norton and Graham counties where humidity will be higher. Refer to the Heat Advisory for these counties for details and safety information. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY... Wednesday, heat index values are forecast to climb to the mid 100's during the afternoon hours across Red Willow, Decatur, Sheridan, Gove, Graham and Norton counties. Isolated to scattered severe thunderstorms may develop Wednesday afternoon mainly along and east of a Oberlin to Russell Springs line. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed.