WNC -- June 26, 2026: Residents across Western North Carolina should prepare for a return of afternoon and evening thunderstorms this weekend, followed by a significant warming trend that is expected to push temperatures into the 90s by the middle of next week.
According to the National Weather Service Greenville-Spartanburg Forecast Office, a humid air mass moving into the region will create favorable conditions for scattered to numerous thunderstorms Friday through Sunday. While many communities will experience periods of sunshine, storms that develop during the afternoon and evening hours could become strong enough to produce heavy rainfall, frequent lightning, gusty winds, and isolated hail.
Localized flooding is also possible in areas that receive repeated rounds of heavy rain, particularly in low-lying locations and near small streams.
High temperatures this weekend are expected to remain in the mid-80s across much of the mountain region, with overnight lows settling into the mid-60s.
The unsettled weather pattern is expected to continue into early next week, although storm coverage may become more scattered. At the same time, temperatures will steadily climb as high pressure strengthens over the Southeast.
By Wednesday and Thursday, afternoon highs are forecast to reach the upper 80s to lower 90s across many valleys in Western North Carolina, with heat index values climbing even higher due to increasing humidity. While isolated afternoon thunderstorms will remain possible, many locations are expected to experience extended periods of hot and muggy conditions.
Meteorologists encourage residents planning outdoor activities, hiking trips, sporting events, or weekend travel to monitor the latest forecasts and remain alert for changing weather conditions. Summer thunderstorms can develop rapidly, especially during the afternoon hours, and may produce dangerous cloud-to-ground lightning well before heavy rain arrives.
Motorists should also use caution during periods of heavy rainfall, as visibility can quickly deteriorate and localized ponding of water may occur on roadways.
The National Weather Service advises residents to seek shelter immediately if thunder is heard, as lightning can strike several miles away from the core of a storm.
Forecast Highlights
Afternoon and evening thunderstorms expected Friday through Sunday.
Some storms may produce heavy rain, gusty winds, lightning, and isolated hail.
Localized flooding is possible in areas receiving repeated downpours.
High temperatures generally in the mid-80s this weekend.
Temperatures rise into the upper 80s and lower 90s by the middle of next week.
Isolated afternoon thunderstorms remain possible throughout next week.
Source: National Weather Service Greenville-Spartanburg Forecast Office.