Canada

Weather Underground Forecast for Saturday, July 11, 2009. The most active weather in the country will stem from a cold front that will sweep through the eastern third of the country. The front itself will be attached to a low pressure system that will move through the eastern portion of Canada.

The front will begin the day stretched from the Central Plains through eastern Canada. It will then progress eastward, ending the day arched from the Appalachians through the Northeast. Substantial precipitation will fall from the Mid-Atlantic through the Northeast as the front passes the area. The front will precede cold air that will filter into the Northern Plains and Upper Midwest, keeping afternoon temperatures relatively pleasant.

Areas of scattered precipitation will continue to form in parts of the West, but this precipitation will not be substantial.

A low pressure system will slide down the West Coast, keeping temperatures mild for much of the West. Coastal clouds will hang around some areas, allowing the immediate coast to remain even cooler.

Warm temperatures are anticipated from the Southwest through the Southern Plains. Heat Advisories are in effect for much of the Southern Plains so residents should take precautions to remain cool.

The Northeast will rise into the 70s and 80s, while the Southeast will see temperatures in the 90s and some 100s. The Southern Plains will rise into the 90s and 100s, while Southwest will see similar temperatures. The Northwest will rise into the 80s and 90s.

Temperatures in the Lower 48 states Friday ranged from a low of 30 degrees at Truckee, Calif. to a high of 116 degrees at Death Valley, Calif.