Area Forecast Discussion
Issued by NWS
FXUS62 KTAE 291924
Area Forecast Discussion
National Weather Service Tallahassee FL
324 PM EDT Sat Apr 29 2017
.NEAR TERM [Through Tonight]...
A light shower is possible for the remainder of the afternoon into
early evening across the region. Otherwise, it will be mostly cloudy
with only patchy fog expected overnight. Lows will be in the upper
60s to around 70.
.SHORT TERM [Sunday Through Monday Night]...
The upper low centered over the Four Corners region this morning
will be centered just north of the Great Lakes Monday morning. The
attendant surface cold front will translate eastward across our
forecast area on Monday, which is 6 hours or so slower than the NWP
model runs from 24 hours ago. There is still good agreement among
the various model runs that much of our region will receive some
needed rain on Monday.
The severe weather threat for Monday still appears marginal. We
expect a rather vigorous QLCS to approach our forecast area from the
west Sunday night, but to begin weakening as it enters southeast AL
and the FL Panhandle in the pre-dawn hours of Monday, as the parent
surface cyclone begins occluding over the Great Lakes. Significant
pre-frontal cloud cover is likely to limit MLCAPE values to 1000
J/kg or less, and weakening wind fields aloft with time will lessen
the potential for significant storm organization. Still, there may
be enough surface cold pool organization, especially early Monday
while vertical wind shear is stronger, to support isolated damaging
wind gusts. The main threat area will be for the region north
and west of Tallahassee.
.LONG TERM [Tuesday Through Saturday]...
We expect generally fair and warm weather Tuesday and Wednesday.
There is a good chance of rain Thursday as an upper-level trough
develops over the central Gulf Coast states. However, the global
models diverge considerably in their handling of this system by
week`s end, with the ECMWF and CMC models taking the trough axis
(and associated surface cold front) east of our forecast area
Thursday night, and the GFS closing off an occluded low over the
Deep South and having it meander through Saturday. The GFS solution
would keep rain chances for our region into Saturday, while the
other solutions would mean clearing by Thursday night. Temperatures
will be near average during this period, but could be below average
of the CMC/ECMWF solutions verified, with cooler, drier air entering
the area sooner.
.AVIATION [Through 18Z Sunday]...
Gusty southerly winds will continue until evening. Partly to mostly
cloudy conditions expected through the TAF cycle. The clouds along
with overnight winds staying elevated in the 5 to 10 range means
widespread fog is not anticipated. However, MVFR/IFR cigs will
develop late tonight and overnight at most sites along with possible
Moderate to strong SE-S winds will continue across the coastal
waters through Monday, ahead of an approaching cold front. Advisory
conditions are possible at times, mainly west of Apalachicola. This
will lead to high surf, strong rip currents, and slightly above-
normal tides. Much lower winds and seas are expected mid week.
Local rivers will remain below flood stage through at least Monday
morning. QPF values will generally be in the 0.50 to 1 inch range
from Tallahassee north and westward, and not enough to cause
significant river rises. QPF values in north FL will likely be much
less. More rain is expected later next week, but model differences
make it unclear as to how much of, if any a flood threat there will
.PRELIMINARY POINT TEMPS/POPS...
Tallahassee 69 86 70 81 58 / 10 0 20 60 30
Panama City 71 81 72 76 62 / 0 0 30 80 10
Dothan 67 87 69 79 56 / 10 0 50 80 10
Albany 69 89 70 80 55 / 10 0 20 70 10
Valdosta 68 89 69 84 60 / 10 10 20 50 40
Cross City 68 89 69 85 65 / 10 10 30 20 50
Apalachicola 71 81 73 79 63 / 0 0 10 50 20
FL...High Rip Current Risk through late Sunday night for Coastal Bay-
GM...Small Craft Advisory from 5 AM to 5 PM EDT Sunday for Apalachee
Bay or Coastal Waters From Keaton Beach to Ochlockonee
River Fl out to 20 Nm-Coastal Waters From Ochlockonee River
to Apalachicola Fl out to 20 Nm-Coastal waters from
Suwannee River to Keaton Beach out 20 NM-Coastal waters
from Apalachicola to Destin FL out 20 NM-Waters from
Suwannee River to Apalachicola FL from 20 to 60 NM-Waters
from Apalachicola to Destin FL from 20 to 60 NM.