Weather across America 9/14/25

(NATIONAL) Rounds of thunderstorms across the Plains, a coastal storm brewing off the Southeast coast, the Pacific Northwest cools off in wake of a passing cold front, a mid-September heat wave persisting up the Mississippi Valley into the Midwest, and warmer than normal weather from the Great Lakes to the Northeast.

An upper-level trough interacting with an elongated front will foster rounds of strong to severe thunderstorms up and down the Great Plains through Sunday night. WPC maintains a Slight Risk for portions of the western Dakotas through Sunday evening. An area of low pressure will take its time exiting the northern Plains where additional rounds of showers and thunderstorms can be expected on Monday before spreading eastward into the upper Midwest later on Monday.

Farther south, only isolated thunderstorms are expected down into the southern Plains where the front is forecast to be more diffuse on Monday. The frontal boundary traversing the Northwest will set off more scattered showers and storms across the northern Rockies and High Plains on Tuesday. Low pressure organizing near a stationary front is forecast to intensify and head towards the Outer Banks of North Carolina Monday night. This system, reminiscent of a cold-season nor'easter, will likely bring a round of soaking rain with windy conditions especially near the coast beginning on Monday.

By Tuesday morning, the core of this coastal storm makes landfall near the Virginia/North Carolina border where the potential exists for a few inches of wind-swept rain pushing farther inland over northeast North Carolina and southeast Virginia. Elsewhere, a Pacific cold front pushing ashore along Pacific Northwest coast will deliver a shot of cooler than normal temperatures to the Pacific Northwest through Monday. In addition to the cooler temperatures, the front will trigger scattered showers and some thunderstorms from the Pacific Northwest this evening, then throughout the Northern Rockies later today into Monday.

Drier conditions return to the Pacific Northwest by Tuesday. Temperature-wise, after witnessing cooler than normal temperatures in the Pacific Northwest today and Monday, hotter than normal conditions return by Tuesday. Much of the eastern two-thirds of the country will not fully shake summer's grasp just yet. The hottest temperatures compared to normal will reside in the Upper and Middle Mississippi Valley where daytime highs will range from the mid 80s to the mid 90s.

Some portions of the Middle Mississippi Valley will remain mired in an ongoing mid-September heat wave with some locations approaching daily record highs. Overnight lows will be on the warmer side in these regions as well. Farther east, unseasonably warm temperatures will stretch from the Mid-South and Great Lakes on east to the Northeast. Temperatures will be closer to seasonal in the Southwest. The Southeast and Mid-Atlantic coast will also be seasonally cool given the increasing cloud cover and rain chances the first half of the week. Mullinax/Kong