There is an increased threat for tropical systems to impact Atlantic Canada during fall 2012.
"With the warmer water off Atlantic Canada, any tropical systems will have a greater chance of maintaining strength compared to normal as they move northward. Look for at least one named storm to threaten coastal Nova Scotia or Newfoundland," AccuWeather Expert Senior Meteorologist Brett Anderson said.
More storms are expected to recurve, passing the U.S. and heading toward Atlantic Canada, especially during the middle of fall, Anderson added.
Above-normal precipitation is forecast for Nova Scotia and Newfoundland for the season with tropical impacts factored in. Rough, battering surf and damaging winds may be other threats.
The unusually warm ocean water off the coast of Atlantic Canada will influence warmer temperatures and humid conditions for the region.
Temperatures should also run above normal across much of Ontario and southern Quebec, including the major cities of Montreal, Quebec City, Ottawa and Toronto.
Less rain than usual is predicted for the Ottawa, Toronto and Windsor areas, following a dry summer across parts of Ontario.
Anderson is forecasting a later-than-normal frost or freeze for eastern Canada.
However, with above-normal water temperatures of the Great Lakes, there is a greater potential for more intense lake-effect snow outbreaks if enough cold air arrives.
Farther north, dry, mild weather may mean a slow start to winter sports such as skiing and snowmobiling across northern and central portions of Ontario and Quebec.
A predominantly northwesterly flow will promote a fairly calm and quiet fall for the Canadian Prairies. Near-normal temperatures and precipitation are expected.
"Winnipeg, Manitoba, and Saskatoon and Regina, Saskatchewan, will have a pleasant fall," Anderson said. After very wet weather recently, the dry and mild fall may be welcomed by residents.
Dry weather should also dominate southwestern British Columbia with below-normal temperatures across western Canada.
"Large highs coming down from Yukon will bring quick shots of chilly air into British Columbia this fall," Anderson explained. Departures of 1-2 degrees C (2-4 degrees F) below normal are possible for the season. Interior British Columbia may have an early frost or freeze as well.
Vancouver will be drier and slightly cooler than normal.
The latter part of the fall should please avid skiers and winter sports enthusiasts that frequent resorts in the western mountains as the British Columbia snow base should get established on schedule.
Darby will continue to deliver locally heavy rain, gusty winds and rough surf to Hawaii into early Monday. But the tropical storm will provide long-term benefits.
Gusty thunderstorms will target the northeastern United States on Monday, but will fail to sweep away the baking heat wave gripping the region.
Dangerous heat will surge northward and send temperatures soaring across the northwestern United States during the final week of July.
Downpours will spread from the lower Mississippi Valley to eastern and central Texas early this week, delivering needed rain but raising the concern for flash flooding.
With the heat of summer comes many unwelcomed pests, including mosquitoes, ants, fruit flies, wasps and stink bugs, into outdoor spaces and homes.
Lawrence, KS (1886)
No rain at all since June 26 of that year.
A hot day throughout the state; Columbus 104 degrees; Augusta - 106 degrees; Louisville - 112 degrees -- record high for state.
Tucson, AZ (1952)
60-mph winds ripped roofs off an apartment complex and an airplane hangar, sweeping dust and sand through the city and leaving 200 persons homeless.