Hot and humid weather will continue across much of the South on Monday as a warm front lingers in the Mid-Mississippi and Tennessee Valleys and high pressure builds behind it.
The front will pull significant moisture across the Deep South through the day while a ridge of high pressure triggers strong heating in areas from the Southern and Central Plains through parts of the Southeast. Moist air and strong daytime highs near the century mark will create dangerous heat conditions during the afternoon.
Elsewhere, scattered showers and thunderstorms will persist in Florida due to a slow moving trough of low pressure and intense moisture. To the north, a frontal boundary and wave of low pressure will move through the Upper Midwest with active weather. Scattered showers and thunderstorms will form ahead of the system from parts of the Upper Great Lakes and the Ohio Valley through areas of the Central and Northern High Plains. Some of these storms may turn severe with damaging wind and hail.
In the West, monsoon moisture in the Southwest will continue to create chances of afternoon scattered thunderstorms.
Temperatures in the Lower 48 states Sunday ranged from a morning low of 32 degrees at Truckee-Tahoe, Calif., to a high of 109 degrees at Wichita, Kan.