Short Range Forecast Discussion NWS Weather Prediction Center College Park MD 400 AM EDT Mon Sep 15 2025 Valid 12Z Mon Sep 15 2025 - 12Z Wed Sep 17 2025 ...Showers and thunderstorms mainly across the northern Plains today; more showers and thunderstorms will move across the northern Rockies/High Plains today and reload over the central Plains Tuesday night... ...A coastal storm will bring wind and rain into the Mid-Atlantic states through the next couple of days... ...Mid-September heat wave persisting up the Mississippi Valley into the Midwest, with warmer than normal weather from the Great Lakes to the Northeast... The weather system responsible for bringing the recent rounds of showers and thunderstorms across the Great Plains is forecast to weaken today. Only isolated showers and thunderstorms are expected across the central U.S. today. Meanwhile, an area of low pressure will take its time exiting the northern Plains where additional rounds of showers and thunderstorms are expected today before spreading eastward into the upper Midwest later today and then dissipate. Low pressure organizing near a stationary front off the coast of the Southeast U.S. early this morning is forecast to intensify and head towards the Outer Banks of North Carolina tonight. This system, reminiscent of a cold-season nor'easter, will likely bring a round of soaking rain into the Mid-Atlantic states through the next couple of days, along with windy conditions especially near the coast. By Tuesday morning, the core of this coastal storm is expected to make landfall where the potential exists for a few inches of wind-swept rain pushing farther inland over northeast North Carolina and southeast Virginia. The storm is forecast to weaken Tuesday night while meandering near the Mid-Atlantic coast as the rain expands into the northern Mid-Atlantic region, possibly reaching the southern New England coast by Wednesday morning with increasing northeasterly winds. Elsewhere, a cold front pushing inland across the Pacific Northwest will deliver a shot of cooler than normal temperatures into the region through Monday. In addition to the cooler temperatures, the dynamics associated with an upper-trough will trigger scattered showers and some thunderstorms across the northern Rockies today, reaching into the northern High Plains by tonight. Tuesday should see the scattered thunderstorms developing farther south over the central Rockies, with a few more thunderstorms over New Mexico. By Tuesday night into early Wednesday, a convergence of dynamics will likely trigger a round of thunderstorms out into the north-central Plains where some of the more organized storms could be quite strong and contain heavy downpours. Meanwhile, drier conditions return to the interior Pacific Northwest with the arrival of the cool air on Tuesday. Temperature-wise, the brief cooldown in the Pacific Northwest today will be followed by a rebound to very warm conditions on Tuesday closer to the coast. Meanwhile, 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 mid-Mississippi Valley where daytime highs will range from the mid 80s to the mid 90s. Some portions of the mid-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 through the first half of the week. Kong/Mullinax Graphics available at https://www.wpc.ncep.noaa.gov/basicwx/basicwx_ndfd.php