textproduct: Greenville-Spartanburg
This forecast discussion was created in the public domain by the National Weather Service. It can be found in its original form here.
WHAT HAS CHANGED
Rain chances are trended downward for the weekend.
KEY MESSAGES
1. Quiet weather before daily shower and thunderstorm chances return Friday into early next week. Humidity and above normal temperatures remain through at least Monday.
DISCUSSION
Key message 1: Quiet weather before daily shower and thunderstorm chances return Friday into early next week. Humidity and above normal temperatures remain through at least Monday.
Generally quiet weather as upper flow remains flat with weak surface high pressure over the southeast. By Friday, a frontal boundary approaches the area, but looks to get hung up west of the CWA. However, a series of shortwaves traverse through the region and peak on Saturday, increasing shower and thunderstorm chances. Guidance depicts rather weak forcing and instability, decreasing confidence for any severe weather on Saturday. Latest guidance also decreases PoP chances for Friday and Saturday, likely locking onto the above mentioned hindrances. Moisture starts to tick back up when surface winds become more S/SW Friday night, elevating the humidity once again. All this to say, shower and thunderstorm chances are highest Saturday, with probabilities tapering Sunday and much drier by Monday.
Additionally, the heat is not quite done with the south as widespread mid 90s peak on Friday for locations east of the mountains. However, height falls with the approaching boundary helps to somewhat cool temps a couple degrees. But, humidity keeps heat indices in the upper 90s with a few locations feeling spotty low 100s in the typical areas.
AVIATION /18Z THURSDAY THROUGH TUESDAY/
At KCLT and elsewhere: VFR conditions prevail through the period. SCT/FEW050 for afternoon cu before SKC/SCT250 at all sites overnight. Winds prevail SW with gusts of 15-20kts at KCLT through 00z. Very light to calm overnight at all terminals before gently increasing Friday morning. BR likely at KAVL between 10z-13z, as usual.
Outlook: Restrictions could return Friday into the weekend with showers and thunderstorms possible. Morning fog/low stratus possible, especially in the mountain valleys.
GSP WATCHES/WARNINGS/ADVISORIES
GA...None. NC...None. SC...None.
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