Heat Advisory 3, NWS Atlanta, GA

Baldwin County, GA, Bibb County, GA, Bleckley County, GA, Chattahoochee County, GA, Crawford County, GA, Crisp County, GA, Dodge County, GA, Dooly County, GA, Emanuel County, GA, Glascock County, GA, Greene County, GA, Hancock County, GA, Houston County, GA, Jasper County, GA, Jefferson County, GA, Johnson County, GA, Jones County, GA, Laurens County, GA, Macon County, GA, Marion County, GA, Monroe County, GA, Montgomery County, GA, Muscogee County, GA, Peach County, GA, Pulaski County, GA, Putnam County, GA, Schley County, GA, Stewart County, GA, Sumter County, GA, Talbot County, GA, Taliaferro County, GA, Taylor County, GA, Telfair County, GA, Toombs County, GA, Treutlen County, GA, Twiggs County, GA, Upson County, GA, Warren County, GA, Washington County, GA, Webster County, GA, Wheeler County, GA, Wilcox County, GA, Wilkes County, GA, Wilkinson County, GA

339 
WWUS72 KFFC 071451
NPWFFC

URGENT - WEATHER MESSAGE
National Weather Service Peachtree City GA
1051 AM EDT Tue Aug 7 2018


GAZ039-050-051-059>062-069-071>076-079>086-089>098-102>113-072300-
/O.CON.KFFC.HT.Y.0003.180807T1700Z-180807T2300Z/
Wilkes-Greene-Taliaferro-Jasper-Putnam-Hancock-Warren-Upson-
Monroe-Jones-Baldwin-Washington-Glascock-Jefferson-Talbot-Taylor-
Crawford-Bibb-Twiggs-Wilkinson-Johnson-Emanuel-Muscogee-
Chattahoochee-Marion-Schley-Macon-Peach-Houston-Bleckley-Laurens-
Treutlen-Stewart-Webster-Sumter-Dooly-Crisp-Pulaski-Wilcox-Dodge-
Telfair-Wheeler-Montgomery-Toombs-
Including the cities of Milledgeville, Macon, Swainsboro, 
Columbus, Warner Robins, Dublin, Lumpkin, Americus, Cordele, 
and Vidalia
1051 AM EDT Tue Aug 7 2018

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 7 PM EDT THIS EVENING...

* Heat Index Values...102 to 107

* Impacts...Hot temperatures and high humidity could lead to heat  
  illness if proper precautions are not taken.

* Locations...Much of middle Georgia south of a Columbus to Forsyth 
  to Washington line.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Heat Advisory means that a period of dangerous heat is expected. 
The combination of hot temperatures and high humidity will create 
heat index readings of at or above 105 degrees. Drink plenty of
fluids, stay in an air-conditioned space and stay out of direct 
sunshine. Remember, the elderly, very young, and people with heart 
conditions and metabolic disorders such as diabetes are most at risk 
in extreme heat. Friends, relatives, and neighbors should check on 
people who may be at risk.

&&

$$

453 
WWUS72 KFFC 072308
NPWFFC

URGENT - WEATHER MESSAGE
National Weather Service Peachtree City GA
708 PM EDT Tue Aug 7 2018


GAZ039-050-051-059>062-069-071>076-079>086-089>098-102>113-080015-
/O.EXP.KFFC.HT.Y.0003.000000T0000Z-180807T2300Z/
Wilkes-Greene-Taliaferro-Jasper-Putnam-Hancock-Warren-Upson-
Monroe-Jones-Baldwin-Washington-Glascock-Jefferson-Talbot-Taylor-
Crawford-Bibb-Twiggs-Wilkinson-Johnson-Emanuel-Muscogee-
Chattahoochee-Marion-Schley-Macon-Peach-Houston-Bleckley-Laurens-
Treutlen-Stewart-Webster-Sumter-Dooly-Crisp-Pulaski-Wilcox-Dodge-
Telfair-Wheeler-Montgomery-Toombs-
Including the cities of Milledgeville, Macon, Swainsboro, 
Columbus, Warner Robins, Dublin, Lumpkin, Americus, Cordele, 
and Vidalia
708 PM EDT Tue Aug 7 2018

...HEAT ADVISORY HAS EXPIRED...

Heat Index values have fallen below critical thresholds.

$$

Area Forecast Discussion
National Weather Service Peachtree City GA
926 PM EDT Mon Aug 6 2018

.UPDATE...
High pressure aloft and at the surface continues tonight. There is
a bit of a lee trough across central portions of the state, which
served to focus precip earlier this afternoon. Isolated convection
continues to feed off of lingering instability, but do expect
activity to diminish in coverage and weaken through midnight. Only
some minor tweaks needed to the temp/dewpoint grids.

The main changes to the forecast were made to the pops earlier
this evening.

&&

.PREV DISCUSSION... /Issued 726 PM EDT Mon Aug 6 2018/

PREV DISCUSSION... /Issued 250 PM EDT Mon Aug 6 2018/

SHORT TERM /Tonight through Tuesday Night/...

Not much change to the recent trends expected over the next 36
hours. Weak, flat, upper ridge slowly breaks down further, but
remains basically in place over the region. Diurnal convection
firing this afternoon will peak in coverage between now and sundown,
then diminish overnight with a repeat of the pattern again tomorrow.
Highest POPs (though still chance at best) will be over the higher
terrain of the north where some orographic help is available and
across central Georgia in the vicinity of a weak surface trough that
lingers across the area. Moderate instability with decent mid-level
lapse rates keeps the chance for a few strong to marginally severe
thunderstorms in the picture early this evening and again tomorrow
afternoon and evening. Temperatures will remain a bit above seasonal
normals, but Heat Indices are expected to remain below advisory
levels through tomorrow.

20

LONG TERM /Wednesday through Monday/...

Models are in fairly good agreement through the long term.  Weak
high pressure at the surface and ridging aloft will start to break
down early Wednesday. An elongated trough with energy confined
across the Canadian territories will shift a front toward the area
Thursday, draping it across the region by Friday. This front will
becoming stationary across our region, eventually washing out until
a more potent system and associated front crosses the region late
Monday/early Tuesday.

This pattern will result in a chance of showers/thunderstorms,
especially across north GA Thursday and Friday as the front
approaches and becomes stationary. Where this front resides will be
the focus for convection through at least Saturday night.  A
deepening trough diving into the mid-west will mean an increase in
convective coverage Sunday. Deep southerly flow tapping into the GOM
becomes juxtapose with the better dynamics aloft. The front
associated with this system will not clear the area until after
peaking heating Monday, thus we can expect another active
afternoon/evening. Conditions look to improve Tuesday if the front
is able to be a clean sweep of the region.

Based on the aforementioned conditions expected in the long term,
we are not forecasting any organized large scale event.  However,
given the ingredients with the latter storm system/front, we may
have more organized strong storms during Sunday and Monday
afternoons/evenings.

Temperatures will be slightly above normal Wednesday into Thursday,
but as cloud cover and precipitation chances increase Friday through
Monday, expect temperature to be AOB climo.

26

PREV DISCUSSION... /Issued 408 AM EDT Mon Aug 6 2018/

LONG TERM /Tuesday Night through Sunday/...
The upper level ridge will flatten Wednesday as a weak trough
approaches from the northwest pushing a weakening surface front
across the forecast area. This boundary will focus convection
through the end of the week across the forecast area. Extended
models diverge by the weekend, as far as the upper trough. The
GFS maintains a more progressive solution, sliding the trough axis
over the forecast area while ECMWF develops a cutoff upper level
low around the Mid MS valley, hanging up the passage of the
frontal boundary, which would lead to continued high rain/storm
chances. Either way good chance pops seem reasonable through the
weekend. Guidance temperatures look to be near normal through the
periods and see no reason to deviate.

Atwell

AVIATION...
00Z Update...
Showers and thunderstorms will remain well south of ATL this
evening, but could continue to impact the southern TAF sites
through the early evening hours. Patchy fog and low cigs are
possible at sites (mainly the southern ones) where rain fell.
Winds will be mostly light and variable overnight but will remain
on the west side during the day with speeds aob 6kt.

//ATL Confidence...00Z Update...
High confidence all elements.

NListemaa

&&

.PRELIMINARY POINT TEMPS/POPS...
Athens          73  92  73  91 /  20  30  20  40
Atlanta         74  92  74  91 /  20  30  20  40
Blairsville     68  87  69  84 /  20  30  20  50
Cartersville    72  92  73  91 /  20  30  20  50
Columbus        75  95  75  93 /  30  40  30  30
Gainesville     73  92  73  91 /  20  30  20  40
Macon           74  93  75  91 /  30  30  30  30
Rome            72  92  73  91 /  20  30  20  50
Peachtree City  73  94  73  91 /  20  30  20  40
Vidalia         74  92  74  93 /  30  30  30  30

&&

.FFC WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

SHORT TERM...NListemaa
LONG TERM....26
AVIATION...NListemaa

Hazardous Weather Outlook...Corrected
National Weather Service Peachtree City GA
900 PM EDT Mon Aug 6 2018

GAZ001>009-011>016-019>025-027-030>039-041>062-066>076-078>086-
089>098-102>113-080100-
Dade-Walker-Catoosa-Whitfield-Murray-Fannin-Gilmer-Union-Towns-
Chattooga-Gordon-Pickens-Dawson-Lumpkin-White-Floyd-Bartow-
Cherokee-Forsyth-Hall-Banks-Jackson-Madison-Polk-Paulding-Cobb-
North Fulton-Gwinnett-Barrow-Clarke-Oconee-Oglethorpe-Wilkes-
Haralson-Carroll-Douglas-South Fulton-DeKalb-Rockdale-Walton-
Newton-Morgan-Greene-Taliaferro-Heard-Coweta-Fayette-Clayton-
Spalding-Henry-Butts-Jasper-Putnam-Hancock-Warren-Troup-
Meriwether-Pike-Upson-Lamar-Monroe-Jones-Baldwin-Washington-
Glascock-Jefferson-Harris-Talbot-Taylor-Crawford-Bibb-Twiggs-
Wilkinson-Johnson-Emanuel-Muscogee-Chattahoochee-Marion-Schley-
Macon-Peach-Houston-Bleckley-Laurens-Treutlen-Stewart-Webster-
Sumter-Dooly-Crisp-Pulaski-Wilcox-Dodge-Telfair-Wheeler-
Montgomery-Toombs-
900 PM EDT Mon Aug 6 2018

This Hazardous Weather Outlook is for portions of North and Central Georgia.

.DAY ONE...Tonight...

The probability for widespread hazardous weather is low.

Isolated showers and thunderstorms will gradually diminish this
evening across north and central Georgia. Some thunderstorms
could be strong with gusty winds, dangerous lightning and heavy
rain.

Patchy fog can be expected overnight which may reduce visibilities
to less than 1/2 mile at times.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday...

Scattered showers and thunderstorms are expected each day, with
increasing chances Thursday through Sunday. Widespread severe
weather is not anticipated, however, some storms could produce
strong winds, frequent lightning and heavy rain.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated tonight.

Special Weather Statement
National Weather Service Peachtree City GA
1157 PM EDT MON AUG 6 2018

GAZ061-074-070430-
Washington GA-Hancock GA-
1157 PM EDT MON AUG 6 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN WASHINGTON AND
SOUTHEASTERN HANCOCK COUNTIES UNTIL 1230 AM EDT...

At 1157 PM EDT...a strong thunderstorm was over Linton, or 10 miles
south of Sparta...moving southeast at 5 mph.

  HAZARD...Up to 40 mph wind...frequent cloud to ground lightning
           and heavy rain.

  IMPACT...Expect minor damage to tree limbs and blowing around of
           light...unsecured objects. Heavy rain may cause temporary
           street flooding especially in poor drainage areas.

Some locations in the path of this storm include
Deepstep, Beulah and Linton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People outdoors should seek shelter immediately. If you can hear
thunder...you are close enough to be struck by lightning. Motorists
should slow down and be prepared for possible loss of control due to
hydroplaning.

LAT...LON 3293 8293 3303 8306 3306 8304 3308 8305
      3306 8307 3306 8309 3307 8311 3323 8301
      3317 8277
TIME...MOT...LOC 0357Z 301DEG 5KT 3312 8299

WIND...40MPH