McComb, Mississippi 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

755
FXUS64 KLIX 150819
AFDLIX

Area Forecast Discussion
National Weather Service New Orleans LA
319 AM CDT Thu May 15 2025

...NEW SHORT TERM, LONG TERM, MARINE...

.SHORT TERM...
(Today through Friday Night)
Issued at 319 AM CDT Thu May 15 2025

High pressure will mostly remain in control across the CWFA
through the short term period. The surface high centered over the
eastern Gulf will continue to bring southerly onshore flow keeping
low level moisture levels rather high with dewpoints likely in the
upper 60s and lower 70s respectively. Aloft, a fairly robust upper
high will reside over the central Gulf. With the higher heights
and thicknesses, daytime high temperatures are forecast to climb
into the lower 90s, especially along and north of I10/12. The
cooler locations will be right on the coast as low level flow over
the slightly cooler water surface keeps these locations in the
middle and upper 80s. As mentioned, the moderate onshore flow will
continue to to filter in higher moisture values leading to heat
index values approaching 100F in many spots this afternoon and
again on Friday. Otherwise, a dry forecast through the short term
period is being advertised. (Frye)

&&

.LONG TERM...
(Saturday through Wednesday)
Issued at 319 AM CDT Thu May 15 2025

The overall pattern from the short term will continue into the
long term period. Our region will remain on the north or northwest
periphery of the upper high over the central Gulf. Although we
are in a more active southwesterly flow aloft, any impulse that
does develop within the flow will remain well to our north and
west. Again, higher heights...generally 593dam at
H5...temperatures will remain very warm to in some cases hot with
afternoon highs in the 90s for most (again except right along the
immediate coast) and heat index values approaching if not
exceeding 100F. Given that usually our first 90F day is right
around May 18th respectively, it`s not unprecedented warmth. But
just an initial taste of summer.

By the end of the period, globals show a broad scale trough
taking shape across the central U.S. With it a surface front and
parent H5 impulse will move into the region, suppressing the upper
ridge just a bit. We will have plenty of low level moisture
around so scattered showers and storms will be possible Wednesday,
however, at this juncture the better signal for rain will be
along and north of I10/12. (Frye)

&&

.AVIATION...
(06Z TAFS)
Issued at 1125 PM CDT Wed May 14 2025

With overnight cooling, an inversion building in is bringing low
stratus and associated low ceilings. From roughly 06Z to 14Z MVFR
conditions will predominate due to the ceiling. Additionally, at
BTR/MCB/HDC/ASD the ceiling is expected to drop further to IFR
level from approx 11Z to 14Z. At MCB there is also a chance for a
short period of some fog development reducing visibilities to 2 to
3 miles...however, the low ceilings have a higher likelihood of
occurring and a higher impact. Beyond 14Z, dry air will return and
mix into the boundary layer bringing conditions to VFR across the
area by about 16Z. (DS)

&&

.MARINE...
Issued at 319 AM CDT Thu May 15 2025

Surface high pressure will continue to reside over the eastern
Gulf. This will continue the ongoing onshore flow pattern across
the local waters. SCA and SCEC headlines are out this morning with
winds generally between 15 and 20 knots. Wave heights will also
respond, especially with the persistent southerly fetch through
the rest of the week with 4` to 5` ft waves expected offshore.
Going into the upcoming weekend, pressure gradient does relax a
bit with generally 10-15kt winds and a slight downward trend in
seas as the surface high pressure nudges very slightly westward
toward our region. (Frye)

&&

.PRELIMINARY POINT TEMPS/POPS...
MCB  91  71  90  73 /  10   0   0   0
BTR  91  73  92  75 /  10   0   0   0
ASD  90  72  90  73 /   0   0   0   0
MSY  90  75  90  76 /  10   0   0   0
GPT  85  73  85  73 /   0   0   0   0
PQL  86  71  87  71 /   0   0   0   0

&&

.LIX WATCHES/WARNINGS/ADVISORIES...
LA...None.
GM...Small Craft Advisory until 10 AM CDT this morning for GMZ550-570.

MS...None.
GM...Small Craft Advisory until 10 AM CDT this morning for GMZ570.

&&

$$

SHORT TERM...RDF
LONG TERM....RDF
AVIATION...DS
MARINE...RDF