Special Weather Statement, NWS Tallahassee, FL

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TALLAHASSEE FL
211 PM EDT Mon Jun 16 2014

.Near Term [Through Today]...

As of 18Z, scattered showers and thunderstorms had begun developing
along and near the surface trough and convergence zone in the
eastern sections of our forecast area - particularly in SC GA. Model
guidance - both global and convection-allowing - is still in good
agreement that convection will fill in across the Florida Big Bend
region between 18-00Z. Therefore, 60-70% PoPs have been maintained
in that area. Isolated-scattered showers and storms are expected
elsewhere. In general, the main threat with any storms should be
heavy rainfall and lightning. Where some thunderstorms manage to
train or move very slowly, localized rainfall totals up to 2-4" will
be possible. One or two strong storms with gusty winds can't be
ruled out, but in general the threat of severe weather is fairly low
for the rest of this afternoon and this evening. There is also good
agreement amongst the various computer models for a general westward
progression of convection with time - numerous storms in the eastern
parts of the area 18-22Z will begin to consolidate and move west,
diminishing in the 22-02Z timeframe. The PoP forecast follows this
general trend through the evening.

.Short Term [Tonight Through Wednesday Night]...

The area of high 500 mb heights over much of the Southeast will
continue to be centered over the TN area. A north-south oriented
trough will translate slowly westward across the FL Peninsula
Wednesday and Wednesday night. The GFS, and to a lesser extent the
ECMWF, forecast a much drier airmass over our region Tuesday and
Wednesday. The driest of the days appears to be Tuesday, when the
PoP will generally be around 20% (below climo of 40%). With
increasing moisture later in the day on Wednesday, the PoP will be
in the 20-30% range. Highs will be in the mid 90s, lows in the lower
70s.

.Long Term [Thursday Through Monday]...

Through Saturday there will be an east-west oriented ridge at
500 mb over the Southeast, and a broad, north-south oriented trough
over the eastern Gulf of Mexico. Both of these features will
dissipate over the weekend as a broad long wave trough develops over
the Upper Midwest and Northeast. At the surface, the western
periphery of the Bermuda ridge will gradually shift from our north
on Thursday, to our south (over the FL Peninsula) over the weekend.
Both the GFS and ECMWF depict a larger, stronger 500 mb trough than
24 hours ago, and show more deep layer moisture as well. While they
differ on just how moist and exactly where the highest moisture will
be, this new development implies slightly higher PoPs and slightly
cooler high temperatures than what we were forecasting previously.
We are now forecasting near-climo PoPs (around 40%) through the
period, with highs in the mid 90s and lows in the lower 70s. Despite
the increased influence of the 500 mb trough, the PoPs will still
follow the normal summer diurnal cycle.

&&

.Aviation...
[Through 18Z Tuesday] While VFR conditions should prevail for much
of the forecast period, IFR VIS is likely in heavier showers and
thunderstorms this afternoon and early this evening. +TSRA and IFR
VIS would be most likely to affect TLH, VLD, and ECP and mainly
between 18-00Z. Some storms could produce some gusty winds, and for
now we've included gusts in the TEMPO groups 20-30 knots.

&&

.Marine...

A high pressure ridge will remain near, but just north of of the
coastal waters through much of the work week. Winds will be light,
and mostly out of the northeast or east overnight, then veer to the
southeast during the morning. Winds will become onshore and increase
slightly near the coast each afternoon from the strong heating of
the land. Waves will be 2 ft or less.

&&

.Fire Weather...

No red flag conditions are expected through the period.

&&

.Hydrology...

Seabreeze showers and thunderstorms in the Florida Big Bend and
South Central Georgia are expected to bring widespread 0.25 to 0.5
inch of rain today with locally higher amounts of 2- 4 inches
possible. All area rivers are below flood stage so these amounts
will not have a significant effect on river levels.

&&

.Preliminary Point Temps/PoPs...

Tallahassee   70  95  72  94  71 /  40  10  10  10  10
Panama City   74  90  75  89  75 /  30  20  10  20  10
Dothan        72  96  72  95  73 /  30  10  10  20  10
Albany        71  96  71  95  72 /  30  10  10  10  10
Valdosta      69  96  68  94  69 /  20  10  10  10  10
Cross City    69  93  69  92  68 /  30  20  20  30  20
Apalachicola  72  88  74  88  73 /  30  10  10  10  10

&&

.TAE Watches/Warnings/Advisories...

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

&&

NEAR TERM...LAMERS
SHORT TERM...FOURNIER
LONG TERM...FOURNIER
AVIATION...LAMERS
MARINE...FOURNIER
FIRE WEATHER...LAMERS
HYDROLOGY...WESTON

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SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
359 PM EDT MON JUN 16 2014

GAZ129-162030-
TIFT GA-
359 PM EDT MON JUN 16 2014

...A SIGNIFICANT WEATHER ADVISORY IS IN EFFECT FOR TIFT COUNTY...

* UNTIL 430 PM EDT

AT 356 PM EDT...THE NATIONAL WEATHER SERVICE HAS DETECTED A STRONG
THUNDERSTORM NEAR TIFTON...MOVING SOUTHWEST AT 10 MPH.

PENNY SIZE HAIL...AND WINDS AROUND 40 MPH ARE EXPECTED WITH THIS
STORM.

LAT...LON 3147 8341 3133 8358 3145 8367 3147 8367
      3156 8350
TIME...MOT...LOC 1959Z 048DEG 9KT 3148 8351

08-LAMERS

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
403 PM EDT MON JUN 16 2014

FLZ019-162030-
MADISON FL-
403 PM EDT MON JUN 16 2014

...A SIGNIFICANT WEATHER ADVISORY IS IN EFFECT FOR NORTHERN MADISON
COUNTY...

* UNTIL 430 PM EDT

AT 359 PM EDT...THE NATIONAL WEATHER SERVICE HAS DETECTED A STRONG
THUNDERSTORM 9 MILES NORTHEAST OF MADISON...OR NEAR PINETTA...MOVING
SOUTHWEST AT 10 MPH.

PENNY SIZE HAIL...AND WINDS AROUND 40 MPH ARE EXPECTED WITH THIS
STORM.

LAT...LON 3046 8347 3061 8356 3065 8341 3064 8340
      3064 8330 3054 8325
TIME...MOT...LOC 2004Z 063DEG 9KT 3058 8336

08-LAMERS