But the area of low pressure is finally weakening and moving northward. Cool, wet and dreary conditions will stick around as the upper-level low pressure gradually weakens.
Temperatures in this region have been way below average for this time of year, but will begin to warm up heading into the weekend to highs in the 80s.
Summer officially arrives on Saturday, with the summer solstice at 5:43 p.m. EDT and a large portion of the country will be treated to warm temperatures.
Florida will still deal with stormy weather for the next few days. Portions of central and southern Florida could see several inches of rain.
Summer-like temperatures and storms in Plains, Midwest
While cool conditions have been a theme across the East, summer is in full swing over the Plains, Midwest and Great Lakes.
The system that brought heavy June snow to the Northern Rockies will push into the Plains Thursday, bringing another round of isolated strong storms from northern Kansas to Minnesota.
Large hail, damaging winds and a few tornadoes are possible in this region.
Cool temperatures will persist over the Intermountain West and Rockies, with 10-20 degrees below average.
Wildfire danger begins to ease
Fire danger is relaxing for much of the West, except in southeast Arizona and southwest New Mexico,.
In those areas, breezy hot dry conditions persist on Thursday, and fire weather remains elevated in the region.
Fox News' Brandon Noriega contributed to this report.