Promising discussion about rain next week from GSP NWS.
LONG TERM /THURSDAY NIGHT THROUGH SUNDAY/...
As of 115 PM Monday: Starting Thursday evening after the 500mb ridge
has flattened and a cold front approaching from the NW. The ECMWF
has been consistent in showing a bone dry frontal passage. The GFS
has been the wetter model but now shows little if any rain for our
area with this front. The front should be moving through the
Midlands by early Friday morning. Therefore, no influence from
diurnal heating. The cooler air will make for a milder day in the
mountains and still hot in the piedmont Friday but at least below
record highs. The cool high pressure will be over the Great Lakes
Friday afternoon and over New England Saturday afternoon. This will
bring our temperatures down to near normal over the weekend. There
will be a strong shortwave moving through the west to east flow
across the nation. The GFS is more progressive bringing the best
chance of rain next Monday. The EC digs a deep trough next week and
deep flow out of the Gulf bringing heavy rain to our area next
Tuesday. Of course, the current forecast ends Monday night. CAPE on
the GFS Monday afternoon around a 1000 from Elberton GA to Charlotte
and rapidly goes to zero in the foothills. QPF amounts from a tenth
to a half inch on Monday which is the best in weeks. We can hope for
at least that continuing through passage of the shortwave and front.
Since the coverage on the models is so good, I would carry higher
POPs on Monday but it is Day 7. Lots can change in a week. Max temps
rise on Monday to about a category above normal.