Cornelius, North Carolina 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

487
FXUS62 KGSP 260250
AFDGSP

Area Forecast Discussion
National Weather Service Greenville-Spartanburg SC
1050 PM EDT Wed Jun 25 2025

.SYNOPSIS...
Heat and humidity remains rather high.  A large upper ridge weakens
late in the week allowing temperatures to get closer to normal by
the weekend. A disturbance meandering over the Deep South will
yield scattered to numerous showers and thunderstorms each day,
especially during the afternoon and evening hours. A weak cold
front reaches our region by Tuesday.

&&

.NEAR TERM /THROUGH THURSDAY NIGHT/...
As of 10:35 PM EDT Wednesday: We`ve still got a few clusters of
thunderstorms over our Upstate and Piedmont zones late this evening.
This activity should continue to wain as we head into the overnight
and the loss of daytime heating will make it more difficult for new
updrafts to grow. A few sct showers may linger into the overnight,
but the rest of the overnight/morning should be quiet. Mtn valley
fog will once again be possible, if not expected, especially in the
Little Tennessee Valley. With light to calm winds expected thru the
morning, patchy fog may develop elsewhere across our area, but it`s
difficult to say.

On Thursday, the upper low associated with a Tropical Upper Tropo-
spheric Trough will slide across Florida with broad upper ridging
extending over the Mid-Atlantic. Temperatures should start off cooler
tomorrow morning compared to today. Less influence from the upper
ridge will also help keep high temps a few degrees cooler as well.
Regardless, highs will once again reach the low to mid 90s outside
the mtns. A moist boundary layer will keep dewpts in the low to mid
70s with the greatest combination of hot temperatures and increased
moisture along the I-77 Corridor in the Charlotte metro area. As such,
another Heat Advisory will be in effect for tomorrow aftn/evening along
and east of I-77. Another round of diurnally driven convection is also
expected tomorrow, but coverage and intensity should be less than today
(Wednesday). Fcst soundings are still supportive of a few strong to svr
storms with wet microbursts being the main hazard.

&&

.SHORT TERM /FRIDAY THROUGH SATURDAY/...
As of 300 PM EDT Wednesday: The upper ridge will continue to weaken
and retreat off the eastern seaboard in response to the approach
of a mid-latitude trough from the Great Lakes/Midwest. The cutoff
low over FL is stalled underneath the ridge, but it will start to
drift slowly northward Thursday night as the rex block breaks down
and the low interacts with the upstream trough.

The pattern will remain unsettled with showers and storms expected
each day. Coverage should be enhanced with an upper diffluent
pattern in between the FL low and mid-latitude trough. Additionally,
terrain circulations and a lee trough will provide low-level focus
for convection both days. Rain chances are accordingly high in
the mountains and foothills (likely PoP), tapering to chance PoPs
in the eastern piedmont. Weak shear profiles and a more moderate
level of instability will limit the severe thunderstorm risk,
the environment will continue to support strong wet microbursts
during peak heating.  SPC has included the area in a marginal risk
on Friday accordingly.  Additionally, with very weak steering flow
below 500 mb, storm motion will be slow, yielding a very local
threat of heavy rainfall and flooding.

&&

.LONG TERM /SATURDAY NIGHT THROUGH WEDNESDAY/...
As of 300 PM EDT Wednesday: The upper low will continue to meander
over the Deep South through the end of the weekend. A stronger
mid-latitude trough will eventually progress eastward, allowing a
cold front to reach the area by the early to mid portion of next
week (there are some timing differences for the front`s arrival but
Tuesday appears most likely). This will result in the continuation
of a wet weather pattern with diurnally-driven showers and storms
Sunday and Monday.  Precipitation coverage looks highest on Tuesday
with the front. An uptick in the threat for severe thunderstorm
and heavy rainfall/flooding is anticipated as well.

&&

.AVIATION /03Z THURSDAY THROUGH MONDAY/...
At KCLT and elsewhere: Clusters of strong thunderstorms are currently
moving south of most of our taf sites, although KCLT and KAND still
have TEMPOs for TSRA for the first couple hrs of the 00z taf period.
After that, a have VCTS thru late tonight at KCLT and our Upstate
terminals for any lingering convection. After midnight, conditions
should be mostly quiet thru the morning. Mtn valley fog will once
again be likely in the Little TN Valley and may develop at KAVL.
As such, I included some MVFR visby at KAVL beginning overnight,
but they could certainly end up going lower. Otherwise, another
round of sct afternoon/evening convection is expected tomorrow,
but coverage and intensity shouldn`t be as much as today. Winds
will be light and VRB thru most of the taf period.

Outlook: Daily chances for afternoon/evening showers and thunder-
storms continue into the weekend. Fog and/or low stratus will be
possible each morning in the usual mtn valleys as well as near lakes
and rivers.

&&

.CLIMATE...
RECORDS FOR 06-26

               MAX TEMPERATURE         MIN TEMPERATURE
  STATION      HIGH        LOW         HIGH        LOW
  -------  ----------  ----------  ----------  ----------
   KAVL      96 1948     65 1961     69 1952     49 1984
                                                    1974
   KCLT     102 1952     68 1965     78 1948     55 1979
   KGSP     100 1952     71 1991     77 1952     55 1979
                1934                                1974
                1914

&&

.GSP WATCHES/WARNINGS/ADVISORIES...
GA...None.
NC...Heat Advisory from 2 PM to 8 PM EDT Thursday for NCZ036-037-
     057-071-072-082.
SC...None.

&&

$$

SYNOPSIS...JK
NEAR TERM...JPT
SHORT TERM...JK
LONG TERM...JK
AVIATION...JPT
CLIMATE...JPT