Heavy Rains and the Threat of Flash Flooding across the Central U.S.

..Unsettled conditions from the Rockies to the Ohio Valley, and mainly dry for the Southeast states… The weather pattern through the middle to end of the week will evolve from an omega block pattern, with upper level lows over the Desert Southwest and New England, to a more progressive pattern by Friday. The upper low is forecast to reach the central Plains by Thursday morning and become weaker aloft while sustaining a frontal boundary across the Ohio Valley and central Plains. In terms of sensible weather impacts, expect scattered to numerous showers and thunderstorms from the central Rockies eastward to the Ohio Valley and central Appalachians, with the greatest rainfall amounts likely across Kansas and also for parts of West Virginia. Severe weather will be possible from Texas to Indiana over the next two days with moisture returning northward from the Gulf of Mexico, and the Storm Prediction Center has additional details on that. Temperatures are forecast to warm up for the Desert Southwest and southern Rockies, which had been cooler with the upper level low in place early in the week. Across the eastern U.S., temperatures are also expected to be below average through mid-week compared to early May standards. This will especially be the case across the Northeast U.S. and the Great Lakes region. Rain chances will increase by the end of the week as moisture returns from the west.