Area Forecast Discussion
Issued by NWS

Current Version | Previous Version | Text Only | Print | Product List | Glossary Off
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30

137
FXUS62 KTAE 300809
AFDTAE

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TALLAHASSEE FL
409 AM EDT Thu Oct 30 2014

.Near Term [Through Today]...

The weakening Sfc cold front is gradually pushing its way SE through
the CWA today with gradually cooler and much drier air filtering in
from the NW. Once the lower clouds dissipate and clear the area,
highs will still be rather mild, with afternoon temps ranging from
the mid 70s to the NW to the lower 80s well to the SE, with the much
more significant cooling expected for tonight. Rain chances are just
about done for the interior today, except for 20-30 percent PoPs
over the extreme SE FL Big Bend.


.Short Term [Tonight Through Saturday]...

Tonight, a weak upper level wave will move off the Florida/Georgia
coastline, slightly strengthening an already present area of surface
low pressure off the Southeast and Mid-Atlantic coastlines. The main
effect locally will be to continue forcing dry boundary layer air
through through the Tri-State region and into the southeast Big
Bend. Lows should fall into the 40s for most locations away from
the coast.

Friday, a very strong +PV anomaly will deepen and amplify the
broad eastern CONUS trough as it dives through the Great Lakes
region and into the Midwest. While heights aloft will lower
through the day, 850mb temps should be near average. With ample
mixing expected under strengthening northwesterly flow, we should
be able to tap into the near normal low-layer temperatures keeping
highs right around, or just below average for this time of year.

An unseasonably strong (but dry) cold front associated with the
aforementioned northern stream anomaly, will pass through the Tri-
State region Friday night. CAA will commence and increase through
the night. This should drive lows down into the upper 30s across
much of southeast Alabama and south Georgia, with low 40s expected
elsewhere.

On Saturday, heights will be at their lowest as the deepest part
of the trough nears the region. At the surface, strong Arctic high
pressure will overspread the region ushering in quite strong and
gusty surface winds which will continue the strong CAA. It is
possible that only the southeast Big Bend of Florida will break
into the 60s for highs on Saturday, with most locations remaining
in the upper 50s.


.Long Term [Saturday Night Through Thursday]...

For Saturday Night, the surface ridge axis should drift closer
which will lead to lighter boundary layer winds and reduced
mixing. This should create the coldest night of the forecast
period with lows away from the coast in the mid-upper 30s. This
could be our first shot at frost of the winter season, but RH
values could be a little too low for widespread frost. After that,
a building ridge in the eastern US and transition to a +NAO/+AO
state will lead to a gradual moderation in temperatures into next
week with continued dry weather.

&&

.Aviation...
[Through 12Z Friday]

Both pre and post frontal low cloudiness are keeping some of the
terminals varying between MVFR and IFR levels early this morning,
but these conditions should be very short lived as the cold front
eases its way on through. Thereafter, VFR conditions should dominate
the Taf sites for the rest of the period, with N winds around 10 kts
during the daylight hours.

&&

.Marine...

Cautionary level winds are expected today in the wake of a weak
cold front. Winds will subside to just below headline levels
tonight through Friday, but a strong cold front passing through
Friday night is expected to increase winds and seas to solid
advisory levels through Saturday. Gusts to gale force will be
possible as well.

&&

.Fire Weather...

As mentioned above, much drier air will be moving into the region
today, and this will be re-enforced dramatically by a very strong
dry cold front this weekend. While earlier it appeared as though Red
Flag conditions would be likely for a good portion the Tri-State
area at some point, the unseasonably chilly afternoon temperatures
may keep the Red Flags at bay.

&&

.Hydrology...

Dry conditions are expected over the next several days, with no
impacts expected along area rivers and streams.

&&

.Preliminary Point Temps/PoPs...

Tallahassee   78  46  74  42  59 /   0   0   0   0   0
Panama City   78  50  74  45  59 /   0   0   0   0   0
Dothan        74  44  73  38  58 /   0   0   0   0   0
Albany        75  44  73  38  59 /   0   0   0   0   0
Valdosta      78  49  73  41  58 /  10   0   0   0   0
Cross City    82  53  75  47  61 /  30  10   0   0   0
Apalachicola  78  53  73  47  59 /  10   0   0   0   0

&&

.TAE Watches/Warnings/Advisories...

FL...None.
GA...None.
AL...None.
GM...None.

&&

$$

NEAR TERM...GOULD
SHORT TERM...HARRIGAN
LONG TERM...LAMERS
AVIATION...GOULD
MARINE...HARRIGAN
FIRE WEATHER...GOULD
HYDROLOGY...HARRIGAN






USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.