Area Forecast Discussion
Issued by NWS Greer, SC
Issued by NWS Greer, SC
998 FXUS62 KGSP 110009 AFDGSP Area Forecast Discussion National Weather Service Greenville-Spartanburg SC 809 PM EDT Thu Jul 10 2025 .SYNOPSIS... The active summertime weather will continue thru the end of the week and into the weekend with scattered to numerous showers and thunder- storms each day. High temperatures will increase again over the weekend and early next week as an upper ridge amplifies. && .NEAR TERM /THROUGH FRIDAY/... As of 756 PM EDT Thursday: No major changes to this evening`s forecast. As a subtle mid-level shortwave drifts across the Carolinas, the bulk of convection has moved east of I-77 along with it, giving way to quieter conditions across the Upstate and much of NC. The exception is a loosely-organized cluster of cells currently developing over I-40. This area is largely untapped as concerns instability, still boasting some 2000+ J/kg sbCAPE...so some thunder should continue for a while there. Its time is limited, however, given the impending loss of daytime heating. Otherwise...the CAM consensus translates any remaining clusters of tstms east of the cwfa by 02z. Given the moist boundary layer and weak sw flow, widespread low clouds and locally dense fog is likely. Not very much changes with respect to the weather pattern for Friday, still some westerly flow, developing moderate instability and seasonably rich moisture. Sensible wx will feature diurnally enhanced tstms becoming numerous again with isolated gusty storms and locally excessive rainfall possible. && .SHORT TERM /FRIDAY NIGHT THROUGH SUNDAY/... As of 12:10 PM EDT Thursday: Mid level ridging will remain in place across the region for the weekend. High temperatures will begin to heat up again to 2-5 degrees above normal after a brief break from well above normal readings today and Friday. Heat indices are not expected to be an issue. With the abundant moisture in place, we expected shower and thunderstorm development each afternoon and evening with the highest pops in the afternoon and evening. To summarize, it will be pretty typical summer weather. && .LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/... As of 12:35 PM EDT Thursday: Mid level ridging will continue into the early and middle parts of next week with typical summertime conditions. Highs early int the week should be 3-5 degrees above normal on Monday, then trending slightly less hot with highs near normal by mid week. The chance of showers and thunderstorms will continue each day mainly during the afternoon and evening. && .AVIATION /00Z FRIDAY THROUGH TUESDAY/... At KCLT and elsewhere: Showers and thunderstorms continue along the I-40 corridor, mainly affecting KHKY circa 2345 UTC. Have removed TS from the 00z TAFs at all the other terminals, which are expected to remain rain-free through the overnight hours. There`s a nonzero chance that KCLT could see some SHRA in the next 1-2 hours should the activity over the Foothills propagate southeast, but it`s unclear whether any of that activity will make it to Charlotte. Otherwise, expect IFR stratus to develop east of the mountains tonight, while valley fog will develop over the mountains. These restrictions should clear up slowly after daybreak, allowing conditions to return to VFR...and another round of convection will begin over the mountains Friday afternoon...then translate eastward into the rest of the terminal forecast area. Outlook: Typical summertime weather is expected into early next week, with scattered to numerous thunderstorms mainly in the afternoon/evening and fog and/or low stratus possible each morning. && .GSP WATCHES/WARNINGS/ADVISORIES... GA...None. NC...None. SC...None. && $$ SYNOPSIS...SCW NEAR TERM...CSH/MPR SHORT TERM...SCW LONG TERM...SCW AVIATION...MPR