Buckhannon, WV; September 15th, 2026.
A powerful dome of surface high pressure anchored off the Atlantic seaboard will impose sharp regional contrasts across West Virginia through Wednesday, delivering sweltering heat to the western river valleys while mountain hollows experience stark nocturnal chills; thereafter, a decelerating cold frontal boundary will bisect the state on Thursday, sparing eastern counties during daylight hours while submerging central and western basins in repetitive downpours through Friday.
Tonight through Wednesday: Confidence 90 to 95 percent.
Atmospheric decoupling and unobstructed radiation loss under clear skies will govern the state tonight, yet localized topography will dictate wildly divergent surface conditions. In the sheltered mountain hollows of the eastern highlands, including Elkins and Lewisburg, dense river fog will blanket the basins by 03:00, driving overnight minimum temperatures down to 52 degrees. Across the central interior foothills surrounding Buckhannon and Clarksburg, ground thermometry logs show rapid heat release from the grass and soil, yielding morning mist and valley lows between 58 and 61 degrees. Conversely, the western lowlands surrounding Charleston and Huntington will retain boundary layer warmth beneath light breezes, holding overnight low temperatures between 64 and 67 degrees.
Following the morning dispersal of valley fog, Wednesday will see an intensifying thermal divide. The western lowlands will bear the brunt of an unseasonable heat wave; afternoon high temperatures will soar to 93 degrees in Huntington and 95 degrees in Charleston, where dew points climbing into the middle 60s will drive heat indices to 98 degrees. Central foothill valleys will reach 88 to 89 degrees under full sunshine, while the higher elevations of Beckley and the eastern panhandle around Martinsburg crest between 85 and 87 degrees. Atmospheric capping will suppress convective development across 90 percent of the state, ensuring completely dry conditions through Wednesday afternoon; however, the mid Ohio River corridor around Parkersburg sits along the outer moisture gradient, where an isolated late afternoon or evening thunderstorm remains the sole exception to statewide dryness. Wednesday night will remain muggy and dry statewide, with low temperatures holding between 65 and 70 degrees.
Thursday through Thursday night: Confidence 75 to 80 percent.
Thursday presents a dramatic east to west split as a deep subtropical moisture plume overspreads the state ahead of an advancing cold front. The western lowlands and Ohio River counties will destabilize first; skies will turn overcast by midday, initiating scattered convective showers and thunderstorms across Huntington and Parkersburg by 13:00, moderating afternoon high temperatures to 84 degrees. Across the central interior from Clarksburg south to Buckhannon and Beckley, cloud cover will thicken steadily through the afternoon, holding high temperatures between 83 and 86 degrees while surface dew points climb into the oppressive 68 to 71 degree bracket, triggering broken lines of thunderstorms after 15:00. In stark contrast, the eastern panhandle around Martinsburg will remain shadowed behind the Allegheny spine; dry air will persist through the daylight hours, allowing afternoon temperatures to reach 86 to 88 degrees under partly cloudy skies without measurable rain.
The primary hydrologic threat materializes Thursday night as upper atmospheric steering currents align parallel to the surface front, stalling the boundary directly across the north central foothills and southern plateau. While the eastern panhandle receives merely light, scattered showers totaling under 0.50 inches after midnight, the corridor from Parkersburg, Clarksburg, and Buckhannon south to Lewisburg will undergo continuous convective training. Repetitive downpours along the stalled front will deposit between 1.5 and 2.5 inches of rain across central counties overnight, overwhelming local drainage hollows, collapsing cloud ceilings to 100 feet, and maintaining uniform overnight low temperatures between 67 and 70 degrees.
Friday through Saturday night: Confidence 60 to 70 percent.
The geographic divide will invert Friday as the stalled front undergoes frontolysis against the higher terrain. Western lowland counties around Huntington and Charleston will break out of the heaviest precipitation by Friday afternoon, seeing lingering mist give way to dry intervals and high temperatures of 78 to 81 degrees. Along the mountain spine and through the central valleys, however, deep moisture will remain trapped against the windward ridges; persistent low stratus, drizzle, and periodic showers will lock the Allegheny front in cool dampness, suppressing Friday daytime high temperatures to 74 to 77 degrees. Widespread valley fog and saturated air will blanket the entire state Friday night, holding overnight low temperatures between 63 and 67 degrees.
On Saturday, the washed out boundary will lift northward, transitioning the state into a humid, terrain driven convective regime. Valley floors in both the western lowlands and the eastern panhandle will enjoy substantial breaks of sunshine, propelling afternoon high temperatures to 83 to 86 degrees. Solar heating interacting with trapped low level moisture will trigger scattered, pulse afternoon thunderstorms exclusively along the high mountain ridges of Randolph, Pocahontas, and Nicholas counties. These orographic storms will remain stationary over the ridges before collapsing rapidly at sunset, leaving all regions partly cloudy, humid, and dry Saturday night with low temperatures resting between 62 and 66 degrees.
Overall forecast confidence: 75 to 85 percent.
Disclaimer This forecast is synthesized from independent data analysis and numerical modeling for informational purposes only. Weather conditions vary across local microclimates and remain subject to rapid change. In the event of severe weather or flooding, always defer to official warnings issued by the National Weather Service and local emergency authorities.
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