Record heat & humidity

Take time to remember today on this 12th anniversary of 9/11. Thank you to all who continue to protect our freedom here in North America. Above is the Portsmouth, NH Coast Guard Station. (ValleyWX)

A stubborn warm front remains just to the south of Montreal this morning separating record September heat from the misty, cool weather in the valley. Cornwall and Kemptville in Ontario were already in the mid 20's this morning while Montreal remained in the middle teens. All areas will see warm and humid highs pushing 30C (86F) today. Records were smashed across Ontario on Tuesday as highs pushed 32 to 34C. Further south where I am in New Hampshire, highs are forecast as warm as 95F today. The record for Montreal today is 31.1 set in 1947. We have a shot at it if we see the low clouds and mist lift.Thunderstorms over the last 24 hours left about 10mm of rain here on L'Ile Perrot. Strong storms are likely over the next 24 hours as a strong cold front slices through this thick, unseasonably humid air. Heavy rain may be the main threat with as much as 50mm expected. Strong winds and hail are possible as well. The biggest threat in Montreal will be late today into early Thursday morning.

The tropics have become active in what has been a very tranquil season to date. Hurricane Humberto developed early this morning saving the Atlantic basin from the "latest developing hurricane in any season record", by three hours! This system is way out in the Atlantic and no threat to land. Meanwhile of greater concern is tropical storm Gabrielle, located 85km west of Bermuda. The island nation has had wind gusts over 40 mph and very rough seas. Gabrielle is expected to weaken slightly as it moves off to the north and northeast. The storm will affect the coastal waters off Atlantic Canada and possibly Newfoundland by the weekend.