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Cornelius, North Carolina 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
NWS Forecast for Cornelius NC
National Weather Service Forecast for: Cornelius NC
Issued by: National Weather Service Greenville-Spartanburg, SC
Updated: 1:51 am EDT Jul 8, 2025
 
Today

Today: Sunny and hot, with a high near 96. Heat index values as high as 102. Calm wind becoming south southwest around 5 mph in the afternoon.
Hot

Tonight

Tonight: A slight chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and midnight.  Partly cloudy, with a low around 74. Light south wind.  Chance of precipitation is 20%.
Slight Chance
T-storms then
Mostly Clear
Wednesday

Wednesday: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 5pm. Some of the storms could produce heavy rainfall.  High near 92. Heat index values as high as 100. Calm wind becoming south southwest around 6 mph in the afternoon.  Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Slight Chance
T-storms then
Heavy Rain
Wednesday
Night
Wednesday Night: Showers and thunderstorms before 5am, then a slight chance of showers. Some of the storms could produce heavy rainfall.  Low around 72. Light south wind.  Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Heavy Rain
then Chance
T-storms
Thursday

Thursday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2pm.  High near 89. Calm wind becoming southwest around 6 mph in the afternoon.  Chance of precipitation is 80%.
Chance
Showers then
T-storms
Thursday
Night
Thursday Night: Showers and thunderstorms, mainly before 1am.  Low around 71. Chance of precipitation is 80%.
T-storms then
Chance
Showers
Friday

Friday: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 5pm.  High near 90. Chance of precipitation is 80%.
Mostly Cloudy
then T-storms

Friday
Night
Friday Night: Showers and thunderstorms likely, mainly before 8pm.  Mostly cloudy, with a low around 71. Chance of precipitation is 60%.
T-storms
Likely then
Chance
T-storms
Saturday

Saturday: A 30 percent chance of showers and thunderstorms after 2pm.  Partly sunny, with a high near 91.
Partly Sunny
then Chance
T-storms
Hi 96 °F Lo 74 °F Hi 92 °F Lo 72 °F Hi 89 °F Lo 71 °F Hi 90 °F Lo 71 °F Hi 91 °F

 

Today
 
Sunny and hot, with a high near 96. Heat index values as high as 102. Calm wind becoming south southwest around 5 mph in the afternoon.
Tonight
 
A slight chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and midnight. Partly cloudy, with a low around 74. Light south wind. Chance of precipitation is 20%.
Wednesday
 
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 5pm. Some of the storms could produce heavy rainfall. High near 92. Heat index values as high as 100. Calm wind becoming south southwest around 6 mph in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday Night
 
Showers and thunderstorms before 5am, then a slight chance of showers. Some of the storms could produce heavy rainfall. Low around 72. Light south wind. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday
 
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2pm. High near 89. Calm wind becoming southwest around 6 mph in the afternoon. Chance of precipitation is 80%.
Thursday Night
 
Showers and thunderstorms, mainly before 1am. Low around 71. Chance of precipitation is 80%.
Friday
 
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 5pm. High near 90. Chance of precipitation is 80%.
Friday Night
 
Showers and thunderstorms likely, mainly before 8pm. Mostly cloudy, with a low around 71. Chance of precipitation is 60%.
Saturday
 
A 30 percent chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 91.
Saturday Night
 
A 30 percent chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 71.
Sunday
 
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92.
Sunday Night
 
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72.
Monday
 
Showers and thunderstorms likely. Partly sunny, with a high near 92. Chance of precipitation is 60%.

 

Forecast from NOAA-NWS for Cornelius NC.

Weather Forecast Discussion
630
FXUS62 KGSP 080623
AFDGSP

Area Forecast Discussion
National Weather Service Greenville-Spartanburg SC
223 AM EDT Tue Jul 8 2025

.SYNOPSIS...
Hot and humid conditions will continue thru midweek with daily
afternoon and evening shower and thunderstorm chances. The heat
abates somewhat going into the weekend, but daily afternoon and
evening shower and thunderstorm chances continue.

&&

.NEAR TERM /THROUGH TONIGHT/...
As of 155 AM Tuesday: Mountain valley fog this morning will
dissipate quickly after daybreak. Can`t rule out some patchy fog
elsewhere, but chance is very low.

A weak upper anti-cyclone remains over the area today but begins to
weaken and move east through tonight. A lee trough develops over the
area with a cold front remaining well to our north. An unstable air
mass remains over the area today. Moisture pools over the mountains
and east of the lee trough, but there is drying between the two.
Expect diurnal convection once again with better coverage over the
mountains and east tapering off to isolated coverage south of I-85.
The one exception could be a differential heating boundary setting
up east of I-77 which the CAMs show with better coverage developing
along it. Right now, the better coverage with that feature should be
to our east, but if the feature develops farther west, then coverage
over the CLT Metro could be higher. SBCAPE rises to around 2000 J/kg
but it`s more of a tall/skinny CAPE with high LFC`s between the
mountains and differential heating boundary where drying occurs.
Even where there is moisture pooling, decent DCAPE and sfc delta
theta-e develops, but bulk shear is 20 kts or less limiting any
potential storm organization. SPC has a Marginal risk for severe
storms with damaging winds along and east of I-77. This makes sense
given the afore mentioned parameters, but an isolated severe storm
will be possible across the mountains as well.

Highs will be in the mid to upper 90s outside of the mountains and
around 90 in many mountain valleys. With dew points mixing out again
during the afternoon, the heat index tops out below 105, but many
locations along and south of I-85 will see values of 100 or higher.

Convection diminishes and weakens during the evening and should end
by midnight. Skies clear out with mountain valley fog expected. Lows
will be near normal across the mountains and up to 5 degrees above
normal elsewhere.

&&

.SHORT TERM /WEDNESDAY THROUGH THURSDAY NIGHT/...
As of 1:45 AM EDT Tuesday: The short-term fcst picks up at 12z
on Wednesday with broad upper ridging to our east and west. On
Wednesday, an upper shortwave will propagate into the OH and TN
valleys, resulting in height falls over our area and slightly
lower thicknesses. This feature will provide some amount of upper
support for our fcst area as diurnal heating produces sfc-based
CAPE of 1000 to 2000 J/kg. Categorical PoPs are fcst across the
mtns and NC Piedmont with likely PoPs over much of Upstate SC and
the GA Piedmont. Bulk-shear values increase slightly ahead of the
trof but values are not generally supportive of organized convec-
tion. Nonetheless, model profiles suggests that there will be enough
mid and upper-level dry air to support isolated damaging microbursts.
PWs of 1.5 to 2" and fairly unidirectional low and mid-level flow
will likely support cell training capable of producing isolated
areas of excessive rainfall/flooding. The increased cloud cover
should help keep high temperatures a few degrees cooler than Tues,
though still a few degrees above-normal for mid-July. While aftn
mixing is expected to lower dewpts a few degrees, heat indices will
likely approach the 100 to 103 degree range over portions of the
Upstate and the CLT metro area. We can expect similar unsettled
weather and convective coverage for Thursday aftn and evening.
Persistent SWLY low-level flow and favorable storm-motion vectors
suggest a continued risk for isolated areas of excessive rainfall
and localized flooding. Bulk-shear values are fcst to increase
slightly, approaching 25 kts. Despite tall and skinny CAPE pro-
files, a wet microburst threat will continue where the strongest
updrafts can develop. High temperatures should fall a few degrees
compared to Wednesday with values near climatology for mid-July.

&&

.LONG TERM /FRIDAY THROUGH MONDAY/...
As of 1:35 AM EDT Tuesday: The extended period picks up at 12z on
Friday and is expected to remain fairly active thru the period.
Our area will remain sandwiched between the broad, subtropical
Bermuda High to our east and broad, weak high pressure to our
west and north. This will keep moist, SLY to SWLY low-level flow
over our area thru most of the period. Aloft, numerous weak short-
waves will move across the OH and TN valleys and over the central
and southern Appalachians thru the period. This energy aloft will
help support likely to categorical PoPs over the mtns and foothills
with chance PoPs over the Piedmont each afternoon/evening. At this
time, there doesn`t appear to be a significant severe wx threat any
particular day, with isolated damaging wet microbursts possible each
day. With the persistent moist airmass in place, the bigger threat
will likely be excessive rainfall from thunderstorms that could pro-
duce localized flooding. Otherwise, high temperatures are expected
to start out near-normal on Friday and gradually warm up to a cate-
gory above normal by Sunday. Dewpts are expected to remain low enough
to keep heat indices below Heat Advisory criteria, although some
values between 100 and 105 degrees are possible over our southern
Upstate and Piedmont zones on Sunday and Monday.

&&

.AVIATION /07Z TUESDAY THROUGH SATURDAY/...
At KCLT and elsewhere: Mainly thin cirrus and light and variable
winds expected through daybreak. The notable exception is mountain
valley fog which has already developed in places. Guidance suggests
KAVL will see restrictions, but it`s not always correct, even when
conditions are favorable. Still, did go with a TEMPO for MVFR vsby
and few IFR. A very unstable air mass and differential heating will
lead to developing cumulus and diurnal convection, with coverage
favoring the mountains. Still, there`s enough of a chance for
PROB30s for all but KAND. Skies clear out overnight with the
potential for mountain valley fog once again. SW wind picks up
through the day, NW at KAVL, becoming light and variable overnight.

Outlook: Typical summertime weather is expected into the weekend,
with sct to numerous SHRA/TSRA mainly in the aftn/evening and fog
and/or low stratus possible each morning.

&&

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

&&

$$

SYNOPSIS...JPT
NEAR TERM...RWH
SHORT TERM...JPT
LONG TERM...JPT
AVIATION...RWH
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Forecast Discussion from: NOAA-NWS Script developed by: El Dorado Weather






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