This Hazardous Weather Outlook is for portions of southern Illinois, southwest Indiana, western Kentucky, and southeast Missouri. .DAY ONE...Today and Tonight Isolated to scattered thunderstorms are expected again today, and a strong to potentially severe storm cannot be ruled out. Damaging wind gusts will be the primary severe storm hazard. Lightning, heavy rain, and hail may also be storm hazards. The heat index will reach up to around 100 to around 105 degrees across the area today. Refer to the Heat Advisory and Special Weather Statement for additional details. .DAYS TWO THROUGH SEVEN...Wednesday through Monday Thunderstorm chances return in earnest Wednesday night through Friday. More widely scattered storms are possible over the weekend into early next week. The main hazards in any storms that develop will be lightning and heavy rainfall. A Heat Advisory continues through Wednesday along and west of a Mount Vernon, Illinois, to Cairo, to Poplar Bluff, Missouri line, for afternoon heat indices around 105 degrees. East of that line, afternoon heat indices will be 100 to 105 degrees. Potentially hazardous heat is expected again this weekend into early next week, with at least portions of the area expecting afternoon heat indices to peak from 100 to 105 degrees. .SPOTTER INFORMATION STATEMENT... Spotters should maintain a watch for potential activation today.