FXUS62 KGSP 191753
AFDGSP

Area Forecast Discussion
National Weather Service Greenville-Spartanburg SC
153 PM EDT Tue May 19 2026

.WHAT HAS CHANGED...
The forecast continues to trend wetter and cooler late this week 
through the weekend.

The aviation discussion was updated to reflect the 18Z TAF issuance.

&&

.KEY MESSAGES...
1. A cold front will approach the area tomorrow and then stall
nearby through the weekend bringing a cooler and wetter forecast.

&&

.DISCUSSION...
Key message 1: A cold front will approach the area tomorrow and then 
stall nearby through the weekend bringing a cooler and wetter 
forecast.

The synoptic pattern currently features upper ridging extending 
along the east coast with an upper low associated with a Tropical 
Upper Tropospheric Trough (TUTT) just off the southeast coast. 
Farther upstream, broad troughing extends from the west coast 
through the Mississippi Valley with a plethora as embedded waves and 
impulses. A surface cold front is also draped along the Ohio Valley 
and is slowly making its way southeast towards the Appalachians. 
Heading into tomorrow, the upper ridge will begin to break down and 
shift offshore with at least some degree of weak moisture return 
continuing into the Carolinas. At least one more hot day is expected 
on Wednesday with upper 80s to low 90s common. As the cold front 
pushes into Tennessee, a few isolated to widely scattered showers 
and storms will be possible across the mountains. While some timing 
uncertainty remains, guidance is in generally good agreement that 
the front will push into the area on Thursday with greater coverage 
of afternoon showers and thunderstorms.

By Friday into the weekend, a sprawling surface high slides out of 
the Great Lakes and into New England and southeast Canada. This 
allow for at least a weak cold air damming wedge to set up shop and 
persist perhaps through the weekend and into the start of next week. 
By this time, deep layer southwest flow is progged to reside from 
the Gulf Coast into the Mid-Atlantic with several embedded 
perturbations. Associated moisture and bouts of forcing combined 
with ascent atop the wedge boundary is expected to keep a noticeably 
wetter and cooler pattern in place for at least several days. This 
will feature highs in the mid 70s to low 80s with daily rain 
chances. No organized severe weather threat or flooding threat is 
apparent at this time, just a beneficial rain that will at a very 
minimum help keep the drought from getting worse.

&&

.AVIATION /18Z TUESDAY THROUGH SUNDAY/...
At KCLT and elsewhere: VFR conditions will prevail at all terminals
through the period. High clouds continue to drift across the area, 
but no restrictions are expected. High clouds may increase in 
coverage tonight into tomorrow as a front slowly approaches the area 
from the west. Otherwise, winds will be generally light and out of 
the southwest with a few isolated gusts possible.

Outlook: An approaching front and increasing moisture will bring a 
more active pattern for mainly afternoon and evening showers and 
thunderstorms beginning Wednesday afternoon and then continuing 
through the end of the week. The potential for overnight fog/low 
clouds will increase as well.

&&

.GSP WATCHES/WARNINGS/ADVISORIES...
GA...None.
NC...None.
SC...None.

&&

$$

TW