Weather Underground Forecast for Friday, April 27, 2012. Precipitation and thunderstorms in the West will wind down on Friday as the disturbances of the region push into the Plains. The southern storm of the West will bring an end to the intense heat in the Southern Plains, while frontal boundaries exiting the Rockies move into the Plains as a strengthening warm front. This disturbance will bring moderate rain and thunderstorms to areas from the Upper Midwest through the southern Ohio and Tennessee Valley. There is a slight risk of severe storms with a few possible tornadoes in areas across central and eastern Kansas, far northern and northeastern Oklahoma, into western and central Missouri. In the East, low pressure will lift across New England with rain showers and chances of thunderstorms as it progresses into southeastern Canada. Winds circulating around this system will spread a cooler airmass across the region, setting the stage for possible snow development across the area. To the south of this system, an associated cold front will trail through the Mid-Atlantic and cross the northern tier of the Southeast with chances of isolated showers and thunderstorms. Temperatures in the Lower 48 states Thursday have ranged from a morning low of 15 degrees at Mt. Washington, N.H. to a high of 102 degrees at Junction, Texas