516
FXUS64 KOHX 072322
AFDOHX

Area Forecast Discussion
National Weather Service Nashville TN
622 PM CDT Tue May 7 2024

...New AVIATION...

.SHORT TERM...
(Rest of today through Thursday night)
Issued at 1141 AM CDT Tue May 7 2024

Earlier this morning, a weakening area of showers and
thunderstorms was clipping our far northwest. This activity
remained sub severe. And now it`s warm and muggy once again with
current temperatures in the lower to mid 70s. High temperatures
are expected to reach the mid 80s so we will become more unstable
as we reach into the afternoon hours. Dynamics are still quite
weak and afternoon convective coverage will be limited. However,
storms that fire could still reach severe limits as capes increase
into the 2000-2500 j/kg range.

A weakening front will be on approach tonight. This will lead to a
line of convection which will push toward our northwestern counties
around 9 pm or so. Still plenty of instability will be in place
along with some shear as well. The activity will work across the
area and reach our southern counties toward sunrise. Again, all
severe types will be in play but the better chances appear to be
across our northern half where the slight risk resides.

On Wednesday, what appears to be a warm front will be lifting
northward in the morning. This will bring us yet another potential
threat of severe weather through about midday. In the afternoon, the
warm front will shift the better focus of severe to our north across
KY. This may hold through the afternoon but will only serve to allow
us to warm up and destabilize even more.

Wednesday night looks like the biggest of all the severe weather
rounds. The primary catalyst will be a cold front with the fropa
expected late Wednesday night or Thursday morning. Prior to the
fropa, it looks as though convection will fire in the prefrontal
area as well as along and just ahead of the boundary. Excellent
phasing of forcing, instability and shear looks likely. Mid level
lapse rates support large hail so all types of severe are on the
table. Timing looks like from 6 pm through 3 am, so a long night
looks to be in store. Helicities are in the 150-300 range but the
classic type of synoptic spring storm setup is not quite there.
The upper pattern is zonal with some w-e elongation noted with the
surface low. However, with the aforementioned strong phasing, the
tornadic threat is still appreciable. Otherwise, flooding could
also be concern, depending largely on how much rain occurs during
the Wednesday morning/early afternoon earlier round.

Near term temps continue to look warm through Thursday with 60s for
lows and mostly lower 80s for highs. We will cool down some by
Friday morning, behind the front, with upper 40s and lower 50s for
lows.

&&

.LONG TERM...
(Friday through next Tuesday)
Issued at 1141 AM CDT Tue May 7 2024

In the extended forecast, there will still be a few shower chances
into the weekend along with cooler temperatures. This will be
followed by warmer temps for early next week as some ridging
returns. The cooler temps over the weekend will feature lows upper
40s to lower 50s, warming back up to around 60 degrees next week.
Highs will be in the 70s for the weekend, and then lower 80s next
week.

&&

.AVIATION...
(00Z TAFS)
Issued at 617 PM CDT Tue May 7 2024

A very active TAF period is expected with several rounds of
thunderstorms. For the remainder of this evening, storms will
continue to be very hit-and-miss. But tonight, likely after 06Z, a
more organized line of storms is expected to move across the area.
Additional isolated to scattered storms are expected after 12Z
with more widespread activity developing late Wednesday afternoon
and evening. Any thunderstorm will be capable of producing gusty
winds, hail, and frequent lightning along with low cigs.

&&

.PRELIMINARY POINT TEMPS/POPS...
Nashville      69  84  68  85 /  80  80 100  40
Clarksville    68  82  66  82 /  60  80 100  20
Crossville     64  78  62  78 /  80  80  90  80
Columbia       68  85  66  84 /  70  80 100  50
Cookeville     66  80  65  79 /  80  80 100  70
Jamestown      64  80  63  78 /  80  80  90  80
Lawrenceburg   69  84  66  84 /  70  70 100  50
Murfreesboro   67  83  66  84 /  80  80 100  50
Waverly        66  82  65  82 /  70  70 100  20

&&

.OHX WATCHES/WARNINGS/ADVISORIES...
Flood Watch from 1 AM CDT Wednesday through Thursday morning for
Bedford-Cannon-Cheatham-Clay-Coffee-Cumberland-Davidson-De Kalb-
Dickson-Fentress-Giles-Grundy-Hickman-Houston-Humphreys-Jackson-
Lawrence-Lewis-Macon-Marshall-Maury-Montgomery-Overton-Perry-
Pickett-Putnam-Robertson-Rutherford-Smith-Stewart-Sumner-
Trousdale-Van Buren-Warren-Wayne-White-Williamson-Wilson.

&&

$$

SHORT TERM...21
LONG TERM....21
AVIATION.....Clements