The nation’s weather

Weather Underground Forecast for Wednesday, September 25, 2013.

Several low pressure systems will bring rainy weather to the Southeast on Wednesday, while more autumn like conditions will sweep across the Northeast.

Lower humidity, cooler conditions, and clear skies can be expected in the forecast for the Northeast on Wednesday as a surface ridge of high pressure will move over the region. This ridge of high pressure will be situated over the Great Lakes, which should bring similar conditions to parts of the upper Midwest and the Mid-Atlantic states. A low pressure system will also linger along eastern Canada, which may draw some wet weather into northern New England. The Southeast can expect showers and thunderstorms on Wednesday as a cold front, accompanied by several low pressure systems, will create stormy conditions for the area. Wet weather will likely affect the southern Appalachians as well as the cold front propagates to the East.

A separate cold front will move through the Northwest and Great Basin on Wednesday, which will bring wet weather to parts of the Pacific Northwest, northern Rockies, and northern Plains. Heavy snow is likely to occur above the treeline in the northern Rockies, while the central Rockies should stay relatively dry throughout the day. For the most part, the Southwest will remain clear of any rain, but temperatures may drop several degrees as the cold front passes through the region. An onshore flow will continue to provide cool, wet conditions to the Pacific Northwest on Wednesday, but should taper off in the evening.

Temperatures in the Lower 48 states Tuesday have ranged from a morning low of 23 degrees at Leadville, Colo. to a high of 95 degrees at Yuma, Ariz.

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