Memphis, Tennessee 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

566
FXUS64 KMEG 152305
AFDMEG

Area Forecast Discussion
National Weather Service Memphis TN
605 PM CDT Sun Mar 15 2026

...New MESOSCALE UPDATE, AVIATION...

.KEY MESSAGES...
Issued at 600 PM CDT Sun Mar 15 2026

- A Wind Advisory is in effect through Monday morning for wind
  gusts of 35 to 45 mph.

- A line of strong to severe thunderstorms will move through the
  entire Mid-South late this afternoon through this evening. The
  main threat will be damaging winds and brief tornadoes, with a
  secondary threat of large hail.

- Freeze Warnings and Watches are in effect for the Mid-South
  Monday and Tuesday mornings.

&&

.MESOSCALE UPDATE FOR SEVERE WEATHER...
Issued at 317 PM CDT Sun Mar 15 2026

A line of storms is quickly developing along the cold front
across western AR. Strong southerly winds with frequent gusts
over 40 mph are advecting higher dewpoints northward into the
area. Dewpoints will continue to climb into the lower 60s across
the Delta ahead of the front, perhaps reaching 63-64F. As the
airmass destabilizes MLCAPE values are starting to climb and now
sit in the 500-1000 J/kg range across eastern AR. A 90 knot mid-
level is punching into the Red River Valley as the upper trough
continues to intensify. Lift across the front will continue to
strengthen over the next several hours, which will lead to more
vigorous convection along the cold front as it heads east. The
latest WoFS is showing MLCAPEs of 1000-1500 J/kg by 22z across
eastern AR with hints of discrete cells ahead of the main line in
the 21z to 00z time frame, merging with the main line around 00z
as it crosses the MS River. 0-1km helicity values look very
impressive at 250+ m2/s2 with sig tor (0-1km) parameter values
over 2, which could lead to a strong tornado if these discrete
cells develop ahead of the line.

&&

.DISCUSSION...
(This evening through next Saturday)
Issued at 1250 PM CDT Sun Mar 15 2026

A 992 mb low pressure system was located over northern Missouri
at noon with a cold front extending into the Red River Valley.
The low-level jet ranges from 40 to 55 kts across the area, and
the surface pressure gradient has tightened from 6 mb across the
forecast area at 2 am last night to about 10 mb late this
morning. As a result, surface winds have picked up considerably
with gusts over 40 mph becoming common over NE AR, the MO
Bootheel, and NW TN. A Wind Advisory is in effect for the entire
area through 7 am Monday.

A powerful 100 kt mid-level jet is exiting the Rockies this
morning and moving into the Southern Plains. This will result in
the rapid deepening of the upper trough across the center of the
country. The upper trough will take on a negative tilt as it
approaches the Mid-South this evening, which will result in very
strong lift across the region as the flow aloft becomes
increasingly diffluent. As the lift strengthens over the frontal
zone, storms will develop across western Arkansas early this
afternoon and then race eastward. Meanwhile, the strong southerly
winds will be advecting in increasingly unstable air. Temps will
warm into the 70s ahead of the front, and the latest CAMs bring
lower 60s dewpoints into the entire Delta region by late this
afternoon.  MLCAPE values should reach at least 750 to 1250 J/kg
across the Delta region as well, with some 12z CAMs even more
aggressive. Expect the QLCS to intensify as it approaches this
instability axis and the upper lift strengthens with the
deepening upper trough. There is some concern that a few discrete
cells could form ahead of the line at the beginning of the event,
mainly across the Delta and along the MS River. A few CAMs are
hinting at this since the cap appears to be weaker than models
have depicted over the last few days. Also, if the instability
overperforms and is more like the 12z HRRR with its MLCAPE of
1000 to 1500 J/kg then discrete cells become more of a
possibility. However, the environment is most favorable right
ahead of the front, and anything that does develop will likely
quickly merge with the line. If these cells do develop, they
represent an all-hazards threat with the possibility of a strong
tornado.

The line of storms will race across the Mid-South, likely taking
about 6 hours once it enters NE AR until it leaves NE MS. The
storms should enter NE AR around 4-5 pm and exit NE MS around 10-
11 pm. The main threat from this line is damaging winds. Strong
wind shear combined with decent instability will result in a
vigorous line of storms that will access the very strong winds
aloft. Steep mid-level lapse rates over 7 C/km and dry air aloft
will help provide fuel for strong downdrafts. Bowing segments
will likely have corridors of significant winds (75 mph+) in this
situation. Embedded spin-up tornadoes are also a concern with
this QLCS. Hodographs are favorable for these types of tornadoes
with good low-level veering and 0-1km helicity values around
250 m2/s2. Look for these with bowing segments or breaks in the
line. The parameter space does support the possibility of a
strong (EF2+) QLCS tornado. Mesovortices that produce these spin-
ups can also produce corridors of significant wind damage.
Finally, there is also a threat of large hail up to the size of
ping pong balls, mainly along and west of the Mississippi River,
where the instability is maximized late this afternoon and early
in the evening.

After the front moves through, gusty west and northwest winds
will continue to gust at 30 to 40 mph overnight. A few snowflakes
may fly as the precipitation ends, but nothing significant is
expected.  Much colder air will rush in with temperatures at or
below freezing across most of the forecast area by Monday
morning. A Freeze Warning is in effect across most of the area.
Monday will be very cold and about 20-25 degrees below normal.
Arctic high pressure will settle over the region Monday
night/Tuesday morning with a hard freeze over the entire Mid-
South. A Freeze Watch continues for Monday night/Tuesday morning.
Lows will be deep into the 20s with perhaps some teens in the
colder spots.

A warming trend will get started Tuesday, though another Freeze
Warning will likely be needed across eastern sections on
Wednesday morning. Temperatures will warm into the 70s by the end
of the week and into the lower 80s next weekend.

&&

.AVIATION...
(00Z TAFS)
Issued at 600 PM CDT Sun Mar 15 2026

Line of TSRAs moving into the area at this time. Line will
continue to move through the TAF sites through 04Z. An AWW may
become necessary at KMEM with the winds expected with the TSRAs.
Meanwhile, CIGS/VSBYS will deteriorate with the line. MVFR CIGS
will then likely linger through the overnight into the morning at
KJBR and KMEM and through midday at KMKL and KTUP. North winds of
15-18 KTS sustained with gusts up to 25-28 KTS will occur behind
the front through the end of the TAF period. Winds will then begin
to decrease around 00Z.

&&

.FIRE WEATHER...
Issued at 1250 PM CDT Sun Mar 15 2026

Fire weather concerns will remain low for the next couple of
days. A widespread  wetting rain is expected late this afternoon
through this evening as a line of thunderstorms moves across the
Mid-South, followed by much colder temperatures for early next
week. Above normal temperatures will return by late week,
however, relative humidity will remain in the 40 percent range.

&&

.MEG WATCHES/WARNINGS/ADVISORIES...
AR...Wind Advisory until 7 AM CDT Monday for ARZ009-018-026>028-035-
     036-048-049-058.

     Freeze Warning from 4 AM to noon CDT Monday for ARZ009-018-
     026>028-035-036-048-049-058.

     Freeze Watch from Monday evening through Tuesday morning for
     ARZ009-018-026>028-035-036-048-049-058.

MO...Wind Advisory until 7 AM CDT Monday for MOZ113-115.

     Freeze Warning from 4 AM to noon CDT Monday for MOZ113-115.

     Freeze Watch from Monday evening through Tuesday morning for
     MOZ113-115.

MS...Wind Advisory until 7 AM CDT Monday for MSZ001>017-020>024.

     Freeze Warning from 4 AM to noon CDT Monday for MSZ001>015-
     020>022.

     Freeze Watch from Monday evening through Tuesday morning for
     MSZ001>017-020>024.

TN...Wind Advisory until 7 AM CDT Monday for TNZ001>004-019>022-
     048>055-088>092.

     Freeze Warning from 4 AM to noon CDT Monday for TNZ001>004-
     019>022-048>055-088>092.

     Freeze Watch from Monday evening through Tuesday morning for
     TNZ001>004-019>022-048>055-088>092.

&&

$$

PUBLIC FORECAST...SJM
AVIATION...KRM