Special Weather Statement, NWS Tallahassee, FL

Area Forecast Discussion
National Weather Service Tallahassee FL
153 PM EDT Sat Jul 6 2019

.AVIATION...
[Through 18Z Sunday]

Widespread showers and thunderstorms expected across the area
through at least 00z tonight with the best coverage east and south
of KDHN. MVFR/VFR conditions expected outside thunderstorms with
MVFR/IFR conditions within the stronger storms. Storm coverage
reduces later this evening and overnight with some low level
cigs/vis bringing MVFR/IFR cigs possible around daybreak. VFR
conditions return mid-morning on Sunday.

&&

.PREV DISCUSSION [1056 AM EDT]...

.NEAR TERM [Through Today]...

Upper level ridging will continue to prevail locally this afternoon,
with a shortwave over the Lower Mississippi and Tennessee Valley's.
A pocket of dry air aloft is noted between the upstream shortwave
and the Tri-State region where deep-layer moisture is bountiful.
Steering flow will remain weakly cyclonic across the northeast Gulf
Coast as a result of yesterday's convective activity, and we'll
continue to have a southeasterly wind component across the southeast
Big Bend, driving an early start to seabreeze convection. A little
further upstream as the boundary layer mixes, a sharp moisture
gradient is expected to be the continued focus for convection as
well as mesoscale boundaries from early afternoon seabreeze storms.
This set-up will result in the highest PoPs along and east of a line
from Panama City through Albany. West of this line, scattered storms
will still be possible, but a later start will mean warmer afternoon
high temperatures. Expect highs west of the aforementioned line to
climb into the middle and upper 90s. Heat indices are forecast to be
around 105 degrees for much of this area. Some pockets of heat
indices above 108 will be possible in the far western Panhandle and
portions of southeast Alabama, and a Heat Advisory has been issued
for these locations.

.SHORT TERM [Tonight Through Monday]...

Precipitation coverage will be less compared to the past couple of
days, with confidence building in advisory level heat on Sunday.

A persistent low to mid-level trough will gradually move south-
east across the region. As this occurs, much lower precip chances
during the overnight away from coastal areas, around 20 to 25
percent. On Sunday and Monday, more seasonable chances of precip
around 40 to 50 percent, focused during the afternoon and evening
with showers and thunderstorms.

With less coverage of precip on Sunday, along with highs in the
mid-90s and dew points in the mid-70s, confidence is increasing
in advisory level heat, especially in the FL Panhandle counties.
This is supported by rather high exceedance values depicted in
CIPS Analogs and WPC Guidance.

.LONG TERM [Monday Night Through Saturday]...

Near normal precip coverage will increase by Wednesday, with
the potential for heavy rainfall late Wed into the weekend.
Heat index values near advisory level on Monday and Tuesday.

The main forecast challenge is the aforementioned trough of low
pressure as it moves southward over the Gulf of Mexico. The
extent of low pressure development, including the location of
this feature, remain highly uncertain. With anomalously high
atmospheric moisture, the signal is there for heavy rainfall over
the gulf, which may propagate into nearby coastal areas,
particularly where any surface trough is established. The time
frame for heavy rainfall would be as early Wednesday night into
the first half of the weekend.

Guidance also suggests we may flirt with advisory level heat
on Monday and Tuesday, but this may be limited by afternoon and
evening showers and thunderstorm coverage. Low confidence.

.MARINE...

Winds generally 15 knots or less and seas up to 2 feet into
Wednesday. Shower and thunderstorm coverage will be above average
across the waters through the period, so plan on locally higher
winds and waves. Looking ahead to Wednesday night and beyond, an
area of low pressure may develop and lead to elevated winds and
waves to at least cautionary levels.

.FIRE WEATHER...

Hazardous fire weather conditions are not expected over the next few
days.

.HYDROLOGY...

Precipitation coverage will be near seasonal levels through
Tuesday, then increase to above average by Wednesday, when
the potential for heavy rainfall increases. Heavier rainfall
amounts should favor the coastal areas and may spread inland
along a trough axis, but it's too early for more specifics.
The main impact will be localized, poor drainage flooding.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not requested. However, spotters are always
encouraged to safely report significant weather conditions when they
occur by calling the office or tweeting us @NWSTallahassee.

&&

.PRELIMINARY POINT TEMPS/POPS...

Tallahassee   74  95  74  94  74 /  50  40  50  50  50
Panama City   79  91  79  90  79 /  20  30  40  50  60
Dothan        75  96  74  94  75 /  30  50  50  50  50
Albany        76  95  75  93  75 /  40  50  50  50  50
Valdosta      73  93  73  92  73 /  50  50  50  50  50
Cross City    75  90  76  91  75 /  50  60  40  70  60
Apalachicola  78  93  78  91  78 /  30  40  40  60  60

&&

.TAE WATCHES/WARNINGS/ADVISORIES...
FL...Heat Advisory until 7 PM CDT this evening for Central Walton-
     Holmes-North Walton-South Walton.

GA...None.
AL...Heat Advisory until 7 PM CDT this evening for Coffee-Dale-Geneva.

GM...None.
&&

NEAR TERM...Harrigan
SHORT TERM...LF
LONG TERM...LF
AVIATION...Dobbs
MARINE...LF
FIRE WEATHER...Harrigan
HYDROLOGY...LF

Special Weather Statement
National Weather Service Tallahassee FL
1200 PM EDT Sat Jul 6 2019

FLZ015-026-027-115-061700-
Inland Franklin FL-Liberty FL-Coastal Franklin FL-Inland Wakulla FL-
1200 PM EDT Sat Jul 6 2019

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN WAKULLA...SOUTHERN
LIBERTY AND NORTH CENTRAL FRANKLIN COUNTIES UNTIL 100 PM EDT...

At 1159 AM EDT, Doppler radar was a cluster of  strong thunderstorms
17 miles east of Stonemill Creek, or 21 miles northwest of
Carrabelle, which were nearly stationary.

Pea size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
East Camp, Jewel Fire Tower, Morgan Place, Vilas, Jensen Place,
Central City, Sanborn, Owens Bridge, Poplar Camp, Smith Creek, Kern,
Wilma, Nixon Garden and Twin Pole.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 2989 8474 3015 8507 3032 8477 3008 8450
TIME...MOT...LOC 1559Z 225DEG 12KT 3011 8489

13-LN

Special Weather Statement
National Weather Service Tallahassee FL
124 PM EDT Sat Jul 6 2019

FLZ016-017-GAZ156-157-061815-
Gadsden FL-Leon FL-Decatur GA-Grady GA-
124 PM EDT Sat Jul 6 2019

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN GADSDEN...
NORTHEASTERN LEON...SOUTHEASTERN DECATUR AND SOUTHERN GRADY COUNTIES
UNTIL 215 PM EDT...

At 123 PM EDT, Doppler radar was tracking a strong thunderstorm 9
miles north of Tallahassee, moving southeast at 10 mph.

Wind gusts up to 50 mph will be possible with this storm.

Locations impacted include...
Havana, Tallahassee, Darsey, Moncrief, Lake Iamonia, Concord, Orchard
Pond, Maclay State Gardens, Rocky Hill, Killearn Lakes, Iamonia,
Calvary, Moccasin Gap, Killearn Estates, Reno, Princes Still,
Amsterdam, Bradfordville, Hinson and Beachton.

LAT...LON 3045 8417 3070 8450 3082 8429 3071 8408
      3068 8408 3067 8402 3066 8401 3065 8401
TIME...MOT...LOC 1723Z 301DEG 21KT 3061 8425

13-LN

Special Weather Statement
National Weather Service Tallahassee FL
206 PM EDT Sat Jul 6 2019

FLZ016-017-061845-
Gadsden FL-Leon FL-
206 PM EDT Sat Jul 6 2019

...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL GADSDEN AND CENTRAL
LEON COUNTIES UNTIL 245 PM EDT...

At 206 PM EDT, Doppler radar was tracking a strong thunderstorm just
north of Doak Campbell Stadium, or over Tallahassee, moving
southeast at 20 mph.

Pea size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Tallahassee, Midway, Woodville, Florida A And M, Tallahassee Comm
College, Florida State University, Doak Campbell Stadium, Lake
Bradford, Ralford Greenway, Macon Community Park, Gaither Community
Center, Lake Munson, Tallahassee Memorial Hosp, Eight Mile Pond,
Killearn Estates, Lake Ella, Tallahassee Mall, Tallahassee Regional
A/P, State Capital Complex and Governors Square Mall.

LAT...LON 3051 8449 3061 8433 3038 8407 3030 8428
TIME...MOT...LOC 1806Z 322DEG 34KT 3045 8431

13-LN

Special Weather Statement
National Weather Service Tallahassee FL
243 PM EDT Sat Jul 6 2019

FLZ017-027-127-061930-
Coastal Wakulla FL-Inland Wakulla FL-Leon FL-
243 PM EDT Sat Jul 6 2019

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN WAKULLA AND
SOUTHEASTERN LEON COUNTIES UNTIL 330 PM EDT...

At 242 PM EDT, Doppler radar was tracking a strong thunderstorm over
Woodville, moving southeast at 10 mph.

Pea size hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Woodville, Tallahassee, St. Marks, Crawfordville, Florida A And M,
Tallahassee Comm College, Florida State University, Doak Campbell
Stadium, Wakulla, Lake Bradford, Newport, Shadeville, Leon Sinks,
Gaither Community Center, Lake Munson, Wakulla Springs, Tallahassee
Memorial Hosp, Eight Mile Pond, Lake Ella and Tallahassee Mall.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3040 8448 3049 8429 3030 8407 3025 8407
      3014 8427
TIME...MOT...LOC 1842Z 322DEG 49KT 3029 8425

13-LN

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Special Weather Statement
National Weather Service Tallahassee FL
325 PM EDT Sat Jul 6 2019

FLZ013-026-062000-
Liberty FL-Calhoun FL-
325 PM EDT Sat Jul 6 2019

...SIGNIFICANT WEATHER ADVISORY FOR EASTERN CALHOUN COUNTY IN THE
PANHANDLE OF FLORIDA AND NORTHWESTERN LIBERTY COUNTIES IN BIG BEND OF
FLORIDA UNTIL 400 PM EDT/300 PM CDT/...

At 325 PM EDT/225 PM CDT/, Doppler radar was tracking a strong
thunderstorm over Blountstown, moving south at 20 mph.

Wind gusts up to 50 mph will be possible with this storm.

Locations impacted include...
Blountstown, Orange, Bristol, Red Oak, Abe Springs, Sharpstown,
Chipola, Red Hill, Marysville, Scotts Ferry, Kennys Mill, Nettle
Ridge, Estiffanulga, Woods, Blountstown Airport, Hugh Creek and
Durham.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3053 8518 3053 8495 3027 8483 3021 8512
TIME...MOT...LOC 1925Z 344DEG 18KT 3044 8503

13-LN