US

Weather Underground Forecast for Monday, September 06, 2010.

Southeastern Texas will welcome this Labor Day with unsettled weather activity as a tropical wave in the southwestern Gulf of Mexico approaches the Texas and eastern Mexico coast. There is a high chance of this system becoming a tropical cyclone as it treks northwestward at 5 to 10 mph throughout the day. Regardless of further development, heavy rainfall is expected along the western Gulf Coast. This area is encouraged to monitor the development and progression of this system throughout the day. Visit http://www.wunderground.com/tropical/ for more information.

Elsewhere, in the South, wet weather will continue throughout the northern Florida Peninsula as a stationary frontal boundary near the state line maintains scattered showers and thunderstorms. Easterly winds associated with high pressure building down the Eastern Seaboard will enhance thunderstorm activity throughout the day.

In the North, a strong low pressure trough will move eastward across the Upper Midwest with significant weather activity. The Labor Day storm will spread significant precipitation and thunderstorms from the Northern Rockies and Northern Plains into the Upper Mississippi Valley. While the heaviest amounts of precipitation will affect North Dakota, Minnesota should expect the strongest thunderstorm activity. Storms in this state may turn severe with damaging winds, hail, and isolated tornadoes. Along with unsettled weather, expect cooler temperatures with the passing of this system.

Calmer weather activity is expected throughout the rest of the nation this Labor Day.

Temperatures in the Lower 48 states Sunday ranged from a low of 25 degrees at Ukiah, Ore. to a high of 115 degrees at Death Valley, Calif.