Area Forecast Discussion
Issued by NWS
FXUS62 KTAE 151946
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TALLAHASSEE FL
346 PM EDT Mon Sep 15 2014
.Near Term [Through Tonight]...
Showers continue to push inland and coverage is expected to
increase through the afternoon. Generally storm motion has been
fairly quick, however, areas where storms linger, such as parts of
Taylor and Dixie counties, have picked up 2 to 3 inches of rain
so far. Showers will linger overnight with PoPs ranging from
30-50%. Lows tonight will be in the lower 70s inland and mid 70s
at the coast.
.Short Term [Tuesday Through Wednesday Night]...
The main item of interest is the potential for heavy rain on
Tuesday. There are some concerning factors that will aid in the
heavy rain threat through Tuesday. There is deep tropical moisture
in place with precipitable water values above 2 inches. There is
some synoptic scale forcing moving in with an upper level trough,
and there is a stalled frontal boundary in the area. The steering
flow is also expected to be fairly weak through Tuesday, which
could lead to some slow moving storms. The ensemble of CAM
guidance places the greatest threat of heavy rainfall closest to
the coast. This is also the area with the highest flash flood
guidance values in general. The latest CAM ensemble probabilities
indicate around a 20% chance of exceeding flash flood guidance
values along coastal areas, with lesser chances farther inland.
Given this, there was some thought given to issuing a flash flood
watch for the coastal panhandle counties, but confidence is just
not quite high enough to pull the trigger at this time. However, a
mention of heavy rain was added to the forecast, and we will be
monitoring trends closely through the night and cannot yet rule
out the possibility of a watch at a later time.
.Long Term [Thursday Through Monday]...
Drier air in the wake of the upper level trough will dominate the
first half of the period. Highs are expected to range from the mid
80s to near 90 with lows in the mid to upper 60s. Late in the
period, another front may move in from the northwest with a
slight increase in PoPs, but nothing significant is currently
[Through 18Z Tuesday] VFR is expected outside of thunderstorms
where brief MVFR conditions are possible. Shower activity should
decrease after sunset. Mentioned fog and low ceilings at sunrise
at TLH, DHN, ABY and VLD.
Winds and seas will remain slightly elevated through Tuesday with
a stalled front in the area. Some decrease is expected on
Wednesday and Thursday as the winds become offshore. By the end
of the week into the weekend, a strong ridge of high pressure will
build northeast of the area, creating a pattern favorable for an
increase in easterly winds and seas.
Relative humidity values will be high this week, preventing us
from reach red flag conditions.
Some locally heavy rain is possible tonight into Tuesday,
especially near the coast with a stalled front in the area that
will begin to move on Tuesday. General amounts of 1-3" are
expected with isolated higher amounts expected. While this may
cause some rises on our area rivers and streams, it is unlikely to
bring any of them to flood stage, especially with the highest
rainfall amounts expected closer to the coast. There is a
possibility of some localized flash flooding through Tuesday if
the heavier amounts fall over an urban area such as Panama City,
but confidence is not quite high enough in this happening to put
up a watch at this time. However, we will be monitoring trends
closely for that possibility.
.Preliminary Point Temps/PoPs...
Tallahassee 72 89 70 92 68 / 50 70 30 10 10
Panama City 76 88 73 90 72 / 60 70 40 10 10
Dothan 71 88 68 91 65 / 40 60 20 10 0
Albany 71 89 70 91 65 / 50 60 30 10 0
Valdosta 70 88 69 91 65 / 50 70 30 20 10
Cross City 72 86 69 88 67 / 40 70 50 40 20
Apalachicola 77 87 73 89 71 / 50 70 50 20 10
FL...High Rip Current Risk through late tonight for Coastal Bay-
Coastal Franklin-Coastal Gulf-South Walton.