Winston-Salem, North Carolina 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

112
FXUS62 KRAH 312342
AFDRAH

Area Forecast Discussion
National Weather Service Raleigh NC
745 PM EDT Mon Aug 31 2026

.WHAT HAS CHANGED...

* Slightly increased the chance for an isolated shower/storm
  from the Virginia border through the Triad and as far south as
  the Triangle for this afternoon.

* No major changes were made to the forecast heading into the
  holiday weekend.

&&

.KEY MESSAGES...
As of 220 PM Monday...

1) Anomalously hot temperatures expected to persist through
Thursday and perhaps into Friday.

2) Labor Day weekend through Monday gradually trends cooler and
drier with a lingering chance of showers and storms.

&&

.DISCUSSION...
As of 220 PM Monday...

KEY MESSAGE 1... Anomalously hot temperatures expected to
persist through Thursday and perhaps into Friday.

A deep subtropical ridge of around 595 dam centered over the
Mid-Mississippi Valley in the 12z H5 RAOBs this morning is
forecast to strengthen as it wobbles gradually eastward and
stretching over the Carolinas by Thurs morning. Highly anomalous
H850 temperatures (at-or-above the 99.5 percentile) initially
directed over the Mid-Mississippi Valley today, will gradually
warm to around 20-22C and slowly be directed over the southern
Mid-Atlantic Wed through Fri. This pattern is highly favorable
for an early September heat wave with minimal convective chances
due to influence from the strong subtropical ridge.

Low-lvl thicknesses and diabatic techniques line up with
statistical guidance and supports widespread mid/upper 90s as
early as Tues, but especially Wed into Fri. A few locations may
reach triple digit air temperatures, but widespread GTE 100
degrees is not expected. Heat index values in the upper 90s to
around 105 degrees are expected each day with areas south and
east of Raleigh most probable to surpass 105 degrees for several
hours due to better low-lvl moisture in place. Targeted heat
advisories appear likely. Increasing convective chances,
an approaching cold front and northeast flow in its wake should
put an end to the heat by Sun.


KEY MESSAGE 2...Labor Day weekend through Monday gradually
trends cooler and drier with a lingering chance of showers and
storms.

Ensemble guidance is indicating that the hot anomalous ridge of
high pressure over the area will gradually shift westward this
coming holiday weekend. Much of the guidance is projecting the
ridge will shift into the Midwest to Central Plains of the US by
Saturday.

As the ridge shifts west, troughing across the Mid-Atlantic and
NE US is favored to take over. This troughing will be
associated with a cold front that approaches Saturday and is
forecast to push through by Sunday. Depending on how the pattern
evolves, some models suggest cool 1026-mb high pressure could
extend into the area by Labor Day, favoring highs for the latter
part of this weekend and into Monday in the low to middle 80s.
Dewpoints could dip into the 50s on Monday, a welcome change.

Ahead of the front, we should see storm chances increase. Those
chances may initially start Friday with a pre-frontal trough,
but better coverage is expected Saturday ahead of the front.
Isolated or scattered storms could linger into Sunday, though
drier conditions are favored as we head into Labor Day. Right
now, we are not outlooked from SPC. However, their long-range
discussion does indicate a possible severe risk over the
Carolinas Saturday ahead of the front. Predictability, however,
is too low at this time, but will be monitored as we go through
the week.

&&

.AVIATION /00Z TUESDAY THROUGH SATURDAY/...
As of 745 PM Monday...

With a couple of potential exceptions, VFR conditions will prevail
across central NC for the next 24 hours. Deep ridging aloft building
eastward from KY/TN will persist through Tue, keeping overall cloud
cover and rain chances minimal. Clouds will likely be restricted to
a few based at 5-6kft, sct-bkn clouds based at 11-15kft, and some
high thin clouds. Later tonight, patchy fog and some IFR cloudiness
is expected to affect the central and southern Coastal Area of NC,
and some of this may reach into FAY airspace 08z-12z. Also, as was
the case this past afternoon, very isolated showers and storms are
possible, mainly 18z-21z. But these should be very few in number, if
they occur at all, and the chance of them affecting any particular
TAF site is low, so will not include them at this time. Surface
winds will remain variable under 8 kts.

Looking beyond 00z Wed, VFR conditions should dominate through Thu.
The chance for showers and storms increases Fri/Sat as deep low
pressure and troughing over the Northeast states nudges the ridge
westward, thus the chance for sub-VFR conditions will rise starting
Fri.

&&

.CLIMATE...

Record High Temperatures:

September 1: KGSO: 99/1932  KRDU: 101/1932

September 2: KGSO: 101/1921  KRDU: 99/1912

September 3: KGSO: 101/1921  KRDU: 99/2010  KFAY: 101/2010

September 4: KRDU: 100/1925  KFAY: 100/1944


Record High Minimum Temperatures:

September 1: KGSO: 74/2012  KRDU: 76/1932  KFAY: 77/2021

September 2: KGSO: 73/1912  KRDU: 75/1912  KFAY: 75/2020

September 3: KGSO: 73/2020  KRDU: 78/1933  KFAY: 77/2020

September 4: KGSO: 72/2018  KRDU: 74/1921  KFAY: 75/2020

September 5: KGSO: 73/2018  KRDU: 74/2012  KFAY: 74/1935

&&

.RAH WATCHES/WARNINGS/ADVISORIES...
None.

&&

$$

DISCUSSION...AS/Kren
AVIATION...Hartfield