Area Forecast Discussion
Issued by NWS Nashville, TN
FXUS64 KOHX 241848
Area Forecast Discussion
National Weather Service Nashville TN
148 PM CDT TUE MAY 24 2016
Surface ridge has moved east of Middle Tennessee, with warm air
and higher dew points advecting into the local area and mid/high
clouds streaming in from the west. A few showers have slipped
across the Tennessee River since this morning, but the radar is
operating in clear air at the moment. The 12Z NAM & GFS greatly
increase POP`s tonight as a result of a weak upper trough and pool
of deeper moisture moving across the area, and will at least
include isolated cells across our north, but a lack of
instability, dry sub-850 mb layer and anti-cyclonic flow at the
surface suggest lower POP`s might be more realistic. By tomorrow,
a deep low pressure system will set up over the central Plains,
with a highly amplified pattern developing aloft. This will put
Middle Tennessee firmly under a maritime tropical air mass for
days as the aforementioned surface low will more or less remain in
place until the weekend, when the upper flow breaks down and a
deep low pressure center (almost tropical in appearance) moves
onshore the South Carolina coast. But for the remainder of this
week, we take on more of a summertime pattern with afternoon and
evening instability contributing to isolated/scattered convection.
Given the lack of any well-defined forcing mechanism, we can
expect nothing organized. The SPC does have us under general
thunderstorms for day 3, but there`s nothing to suggest anything
severe for Middle Tennessee through day 7. Look for high and low
temperatures to level off in the mid to upper 80`s and mid to
upper 60`s most areas from tomorrow through the end of the
18Z TAF DISCUSSION.
VFR conditions are forecast to prevail at area terminals
through the forecast period.
Isolated thunderstorms are forecast this afternoon over
northwestern Middle Tennessee, but believe coverage will be too
low to warrant any mention of precipitation in CKV TAF.
A weak shortwave sweeps over western and central sections of the
Mid-state late tonight and Wednesday morning, and introduced a
VCSH for CKV between 09z and 15z.
.PRELIMINARY POINT TEMPS/POPS...
Nashville 64 88 67 89 68 / 10 20 20 20 10
Clarksville 62 86 65 86 66 / 20 20 20 30 20
Crossville 59 84 63 85 66 / 10 10 20 20 10
Columbia 61 88 65 88 67 / 10 10 10 10 10
Lawrenceburg 62 88 65 88 67 / 0 10 10 10 10
Waverly 62 87 66 87 67 / 10 20 20 20 10