Rion, South Carolina Weather Forecast Discussion

523
FXUS62 KCAE 100058
AFDCAE
Area Forecast Discussion
National Weather Service Columbia SC
858 PM EDT Tue Sep 9 2025
.SYNOPSIS...
High pressure will dominate the weather pattern through the
week with dry conditions and a slow warming trend.
&&
.NEAR TERM /UNTIL 7 AM WEDNESDAY MORNING/...
Key Message(s):
- Cool and dry
Surface high pressure continues to ridge into the Mid Atlantic
States from New England. There is a large gradient in moisture
over the forecast area with GOES derived PWAT values as low as
0.5 inches over the Upstate to 1.25 inches along the coast.
Although too dry for fog at any location, we will likely see
stronger radiational cooling to the west where temperatures
should drop into the low to mid 50s while the eastern Midlands
remain closer to 60 degrees for a low.
&&
.SHORT TERM /7 AM WEDNESDAY MORNING THROUGH THURSDAY NIGHT/...
Key message(s):
- Surface ridging and calm weather expected throughout the
  middle of the week.
Strong high pressure remains in place across the NE CONUS,
extending surface ridging, northeasterly flow, and dry advection
down the lee side of the of the Appalachians. While some weak
troughing will remain draped across the TN Valley and
Appalachians during this period, PWAT`s well below average and
surface dews in the 50`s will prevent any appreciable cloud
cover let alone precip chances. Temps will steadily rise both
Wednesday and Thursday, back near average, as persistent clear
skies and solar insolation moderates the airmass a bit.
&&
.LONG TERM /FRIDAY THROUGH TUESDAY/...
Key message(s):
- Surface ridging and calm weather expected throughout the middle
  of the week.
Strong high pressure remains in place across the NE CONUS,
extending surface ridging, northeasterly flow, and dry advection
down the lee side of the of the Appalachians. While some weak
troughing will remain draped across the TN Valley and
Appalachians during this period, PWAT`s well below average and
surface dews in the 50`s will prevent any appreciable cloud
cover let alone precip chances. Temps will steadily rise both
Wednesday and Thursday, back near average, as persistent clear
skies and solar insolation moderates the airmass a bit.
&&
.AVIATION /01Z WEDNESDAY THROUGH SUNDAY/...
High confidence in VFR conditions through the 24hr forecast
period.
General troughing continues across the central and eastern
CONUS, favoring surface high pressure across the Mid-Atlantic.
North and northeasterly flow has been common across the area as
a result, with very dry air filtering into the forecast area.
VFR conditions are favored through the period, with the
exception of AGS/OGB where ground fog may try to creep in at
some point. Thinking it is too dry and a 15 knot low-level jet
will keep things tame, though. Otherwise, expect a low-impact
forecast!
EXTENDED AVIATION OUTLOOK...A dry air mass will be over
the region this week and no significant aviation restrictions
expected.
&&
.CAE WATCHES/WARNINGS/ADVISORIES...
SC...None.
GA...None.
&&
$$

NWS CAE Office Area Forecast Discussion