Weather Underground Forecast for Wednesday, Feb. 26, 2014A warm front will weaken along the Gulf Coast on Wednesday, while a cold frontal boundary will move over the West Coast.Showers and thunderstorms will be possible along the Gulf Coast on Wednesday as a frontal boundary slowly diminishes across the area. A wave of low pressure is expected to shift from the northward fron the Southeast, allowing for light snow showers to develop over the MId-Atlanitc. Conditions will likely remain cold and blustery across the Northeast, the Great Lakes and the upper Midwest on Wednesday as high pressure continues to usher arctic air across the region. Temperatures are forecast to be 20 to 30 degrees below normal across the northern tier of the country. Weak low pressure waves will drift across the Ohio Valley, which could lead to light scattered snow throughout the day.A cold front will begin to inch across the West Coast during the late morning and early afternoon on Wednesday. Rainy weather and scattered thunderstorms will push across Washington, Oregon and California, although the heaviest rain is expected over northern California. High elevation snow showers will move over the Sierra Nevadas and the Cascades. Meanwhile, low pressure will linger over the central Rockies, as intermittent snow showers are forecast for parts of Wyoming and Colorado..Temperatures in the Lower 48 states Tuesday have ranged from a morning low of -27 degrees at Longville, Minn. to a high of 85 degrees at Kendall, Fla.