Ahead of a cold front, elevated and critical fire weather conditions will develop across the southern Great Basin through the West Slope, much of the Southwest, and onto southern High Plains today, with southwest sustained winds of 15-30 mph, gusting to 35-50 mph amid minimum relative humidity of 5-15%. Isolated mixed wet and dry thunderstorms are likely from southeast Arizona into the western Trans Pecos, with lower chances of thunderstorms farther north in New Mexico. Behind the cold front, showers will develop across portions of the Pacific Northwest, especially west of the Cascades and in northeast Washington, through the northern Rockies, with snow likely above 5,000 feet in northwest Montana. Heavy rain is possible from northeast Washington into far northwest Montana as well. Thunderstorms are expected across northern Utah into southwest Montana, with severe storms across the northern Plains, Upper Midwest, Great Lakes, and into the Mid-Atlantic. Hot and humid conditions will develop from the central Gulf Coast through the Mississippi, Missouri, and Ohio Valleys, and Midwest. Temperatures will warm in central and eastern Alaska, with stronger winds across much of the state. Showers and thunderstorms will spread over western Alaska and the Panhandle, with wetter thunderstorms spreading from south-central Alaska through the Interior.