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Weather Underground Forecast for Thursday, July 24, 2014
A cold front will extend from the southern Plains to the Northeast on Thursday, while a separate cold front will stretch from the Great Basin to the northern Plains.
An area of low pressure will inch across the northern Plains on Thursday. A cold front associated with this system will extend across the upper Intermountain West and the Great Basin. As warm, humid air interacts with this system, strong to severe thunderstorms will develop over the upper Intermountain West and the northern Plains. Severe thunderstorms will be possible over eastern Montana, western North Dakota and northwest South Dakota. These thunderstorms will be capable of producing large hail, dangerous straight line winds and isolated tornadoes. Scattered showers will trail this system and move across the Pacific Northwest. Disorganized showers and thunderstorms will also be possible across the upper Mississippi Valley and the central Plains. Just to the south, monsoonal moisture will aid in producing thunderstorms over the southern Rockies.
A separate cold front will extend across the southern Plains, the lower Mississippi Valley, the Tennessee Valley, the MId-Atlantic and the Northeast. As this cold front overrides warm, humid air from the Gulf of Mexico, widespread rain and thunderstorms will develop across the Gulf Coast, the Deep South, the Southeast, the Mid-Atlantic and coastal New England. The Ohio Valley and the Great Lakes will stay mostly clear of precipitation.