Alert archive / Georgia / Special Weather Statements in 2020

Special Weather Statement, NWS Atlanta, GA

July 15, 2020Chattahoochee County, Marion County, Georgia

NWS Atlanta, GA issued this special weather statement at Jul 15, 2020, 5:45 PM EDT for Chattahoochee County, Marion County, Georgia. It was in force for 30 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 15, 2020, 5:45 PM EDT (21:45 UTC)
Expired: Jul 15, 2020, 6:15 PM EDT
In force: 30 min
Issued by: NWS Atlanta, GA
Hail: 0.88 in
Wind: 50

Counties Chattahoochee County, GA, Marion County, GA

The radar

The Maxwell AFB radar (KMXX), 115 km from the middle of the area, began a volume at 21:47 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 9.8 hours before the alert went out and 122 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 392 J/kg
Mixed-layer CIN: -71 J/kg
Mixed-layer LCL: 1417 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 6 m²/s²
0-3 km storm-relative helicity: -9 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Atlanta, GA wrote its last area forecast discussion before this special weather statement went out at Jul 15, 3:16 PM EDT, 2 hours 29 minutes earlier.

Area forecast discussion, Jul 15, 3:16 PM EDT, 2 hours 29 minutes before

Area Forecast Discussion
National Weather Service Peachtree City GA
316 PM EDT Wed Jul 15 2020

.SHORT TERM /Tonight through Thursday Night/...

An upper level ridge continues to slowly move eastward across the
eastern CONUS through the short term period, and will be centered
over the Atlantic coast by Thursday morning. With the ridge axis and
surface high pressure currently positioned to the east of the
forecast area, surface winds have shifted to a southeasterly
direction on the back side of the high pressure. Meanwhile,
advection of low-level tropical moisture is contributing to
increasing dewpoints and instability. Meanwhile, a weak surface
boundary remains stalled near the I-20 corridor, which is
maintaining deeper moisture and higher humidity along the boundary
and to the south.

Convection throughout the short term period will be diurnally-driven
in nature, and is already developing across north and central
Georgia. With increasing instability, an increase in
showers/thunderstorms is anticipated across the forecast area, with
slight chance PoPs or less only in northeast Georgia, and chance
PoPs elsewhere across the forecast area. Widespread severe weather
is not expected, but with SBCAPE values rising into the 2000-3000
J/kg range in west Georgia, a few storms could become strong to
marginally severe and capable of producing gusty winds, in addition
to frequent lightning and locally heavy rain.

Showers and thunderstorms will gradually diminish tonight. With very
light winds and humid conditions in central Georgia, some patchy fog
is possible in central Georgia in the early morning. The pattern
will remain consistent on Thursday as the ridge moves over the
Atlantic. With continued southerly flow, moisture advection will
continue and dewpoints will climb into the low to mid 70s areawide.
Scattered afternoon thunderstorms are once again expected on
Thursday. The highest rain chances will be in the high-end chance
PoPs range (40-50 percent) across majority of the forecast area,
with lower chances further east.

Both low and high temperatures will be consistently above normal
through the short term period. Notably, highs are expected to range
from the low to mid 90s in north Georgia and mid to upper 90s in
central Georgia. Considering deeper moisture in central Georgia,
heat indices from 100 to 104 will be observed along and south of the
Atlanta metro this afternoon. While some isolated areas will reach
or exceed heat indices 105 degrees in central Georgia, values are
overall not anticipated to reach advisory criteria. Heat index
values will be slightly lower on Thursday, ranging from 97-102
degrees across the majority of the forecast area.

King

.LONG TERM /Friday through Wednesday/...

No major changes made to the extended forecast. The long term will
continue to be characterized by some level of upper level ridging
across the area. This will keep diurnally driven showers and
thunderstorms and very warm temps through day 7. There are minor
differences in the models with increased moisture and timing but
they are all showing a similar summertime pattern. Overall the trend
is increased moisture as we go into next week, and temps remaining
mainly in the 90s. Right now it appears Heat Indices will reach into
the upper 90s to lower 100s each day as well. We will keep an eye on
things as we may need to issue a heat advisory sometime over the
next week or so.

01

.AVIATION...
18Z Update...
VFR conditions will persist through the TAF period. Mid-level
stratus over ATL has dissipated and a cu field at 040-050 has
developed across north and central Georgia. Scattered convection is
ongoing near the ATL sites, and a TEMPO group for TSRA is in place
for the time the greatest coverage is anticipated, between 18-21Z.
SHRA/TSRA is expected to come to an end this evening by 02Z, and mid-
level stratus is once again possible in the overnight and early
morning hours Thursday. Prevailing winds are expected to remain from
the SE at 3-7 kts through the period, with the exception of gusts
associated with any TSRA that occurs.

//ATL Confidence...18Z Update...
Medium to high confidence on all elements.

King

&&

.PRELIMINARY POINT TEMPS/POPS...
Athens          72  93  72  94 /  20  30  10  30
Atlanta         73  91  73  93 /  20  40  30  20
Blairsville     68  86  68  86 /  20  50  30  50
Cartersville    72  92  72  93 /  20  50  40  30
Columbus        74  94  74  95 /  30  40  30  20
Gainesville     71  89  72  91 /  20  40  20  30
Macon           73  94  72  94 /  30  30  20  20
Rome            72  93  73  94 /  20  30  30  30
Peachtree City  72  91  72  93 /  20  40  30  20
Vidalia         74  95  73  95 /  30  20   5  20

&&

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

SHORT TERM...King
LONG TERM....01
AVIATION...King

Hazardous weather outlook, Jul 15, 4:20 AM EDT, 13 hours 25 minutes before

Hazardous Weather Outlook
National Weather Service Peachtree City GA
420 AM EDT Wed Jul 15 2020

GAZ001>009-011>016-019>025-027-030>039-041>062-066>076-078>086-
089>098-102>113-161000-
Baldwin-Banks-Barrow-Bartow-Bibb-Bleckley-Butts-Carroll-Catoosa-
Chattahoochee-Chattooga-Cherokee-Clarke-Clayton-Cobb-Coweta-
Crawford-Crisp-Dade-Dawson-DeKalb-Dodge-Dooly-Douglas-Emanuel-
Fannin-Fayette-Floyd-Forsyth-Gilmer-Glascock-Gordon-Greene-
Gwinnett-Hall-Hancock-Haralson-Harris-Heard-Henry-Houston-Jackson-
Jasper-Jefferson-Johnson-Jones-Lamar-Laurens-Lumpkin-Macon-
Madison-Marion-Meriwether-Monroe-Montgomery-Morgan-Murray-
Muscogee-Newton-North Fulton-Oconee-Oglethorpe-Paulding-Peach-
Pickens-Pike-Polk-Pulaski-Putnam-Rockdale-Schley-South Fulton-
Spalding-Stewart-Sumter-Talbot-Taliaferro-Taylor-Telfair-Toombs-
Towns-Treutlen-Troup-Twiggs-Union-Upson-Walker-Walton-Warren-
Washington-Webster-Wheeler-White-Whitfield-Wilcox-Wilkes-
Wilkinson-
420 AM EDT Wed Jul 15 2020

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

.DAY ONE...Today and Tonight...

Isolated to scattered thunderstorms are expected across much of
north and central Georgia this afternoon and evening. The main
hazards will be gusty winds, frequent lightning and brief heavy
rain with any strong storms.

Heat Indices of 100 to 105 degrees can be expected over central
and portions of north Georgia this afternoon.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday...

For Thursday through Saturday, isolated to scattered thunderstorms
are expected across the area during the afternoon and evening hours.
Some storms could be strong with gusty winds, frequent lightning
and locally heavy rainfall.

For Sunday through Tuesday, Scattered to numerous thunderstorms are
expected across the area. Some storms will be strong with gusty
winds, frequent lightning and locally heavy rainfall.

Heat indices of 100 to 105 degrees can be expected over much of the
area away from the mountains through Tuesday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed through tonight.

In the hours before

Local storm report, Jul 15, 5:06 PM EDT, 39 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
506 PM EDT WED JUL 15 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0448 PM     HAIL             1 NE BERKELEY LAKE      33.99N  84.18W
07/15/2020  E1.00 INCH       GWINNETT           GA   PUBLIC

            MOSTLY NICKEL-SIZED HAIL WITH A FEW QUARTER-SIZED HAIL
            STONE FELL NEAR BERKELEY LAKE ON THE SW SIDE OF DULUTH.
            A LARGE OAK TREE WAS ALSO DOWN IN THE FRONT YARD OF A
            HOUSE ON WOOD ACRES BLVD WITH SEVERAL LARGE BRANCHES
            RANGING FROM 2-8 INCHES IN DIAMETER.

&&

EVENT NUMBER FFC2000891

THIEM

Local storm report, Jul 15, 5:09 PM EDT, 36 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
509 PM EDT WED JUL 15 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0450 PM     HAIL             1 NNE BERKELEY LAKE     34.00N  84.18W
07/15/2020  E1.00 INCH       GWINNETT           GA   PUBLIC

            QUARTER SIZED HAIL FELL FOR APPROXIMATELY 2 MINUTES

&&

EVENT NUMBER FFC2000892

THIEM

Local storm report, Jul 15, 5:10 PM EDT, 35 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
510 PM EDT WED JUL 15 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0343 PM     TSTM WND DMG     3 E LEBANON             34.15N  84.46W
07/15/2020                   CHEROKEE           GA   EMERGENCY MNGR

            A TREE WAS REPORTED DOWN NEAR THE INTERSECTION OF
            LITTLE BROOK DRIVE AND LITTLE BROOK LANE.

&&

EVENT NUMBER FFC2000893

LREAVES

Local storm report, Jul 15, 5:20 PM EDT, 25 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
520 PM EDT WED JUL 15 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0456 PM     TSTM WND DMG     DEXTER                  32.44N  83.05W
07/15/2020                   LAURENS            GA   PUBLIC

            3 TREES REPORTED DOWN ON AND NEAR CEMETERY RD,
            NORTHEAST OF DOWNTOWN DEXTER

&&

EVENT NUMBER FFC2000894

THIEM

Special weather statement, Jul 15, 5:41 PM EDT, 4 minutes before

Special Weather Statement
National Weather Service Peachtree City GA
541 PM EDT Wed Jul 15 2020

GAZ080-091-092-152215-
Schley GA-Taylor GA-Marion GA-
541 PM EDT Wed Jul 15 2020

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN SCHLEY...
SOUTHWESTERN TAYLOR AND NORTHEASTERN MARION COUNTIES UNTIL 615 PM
EDT...

At 540 PM EDT...a strong thunderstorm was near Charing, or 11 miles
northeast of Buena Vista...moving northwest at 10 mph.

  HAZARD...40 to 50 mph wind...nickel sized hail and frequent cloud
           to ground lightning.

  IMPACT...Expect minor damage to tree limbs and blowing around of
           light...unsecured objects.

Some locations in the path of this storm include
Rupert, Charing and Mauk.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People outdoors should seek shelter immediately. If you can hear
thunder...you are close enough to be struck by lightning.

LAT...LON 3244 8424 3235 8432 3240 8448 3248 8446
      3252 8438
TIME...MOT...LOC 2140Z 138DEG 7KT 3242 8436

HAIL...0.88IN
WIND...50MPH

Special weather statement, Jul 15, 5:45 PM EDT, 0 minutes before

Special Weather Statement
National Weather Service Peachtree City GA
545 PM EDT Wed Jul 15 2020

GAZ090-091-102-103-152215-
Chattahoochee GA-Stewart GA-Marion GA-Webster GA-
545 PM EDT Wed Jul 15 2020

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN CHATTAHOOCHEE...
NORTHEASTERN STEWART...MARION AND NORTHWESTERN WEBSTER COUNTIES UNTIL
615 PM EDT...

At 545 PM EDT...a line of strong thunderstorms was along a line
extending from near Tazewell to near Zellobee to near Seminole...and
moving west at 20 mph.

  HAZARD...40 to 50 mph wind...nickel sized hail and frequent cloud
           to ground lightning.

  IMPACT...Expect minor damage to tree limbs and blowing around of
           light...unsecured objects.

Some locations in the path of these storms include
Buena Vista, Cusseta, Brantley, Seminole, Christopher, Tazewell,
Church Hill, Brooklyn, Renfroe, Manta and Zellobee.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People outdoors should seek shelter immediately. If you can hear
thunder...you are close enough to be struck by lightning.

LAT...LON 3214 8480 3238 8481 3248 8463 3238 8439
      3235 8439 3228 8451 3209 8450
TIME...MOT...LOC 2145Z 105DEG 18KT 3237 8448 3230 8458 3214 8460

HAIL...0.88IN
WIND...50MPH

The office that day

Everything else NWS Atlanta, GA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 15, 2:54 PM EDT	Severe Thunderstorm Warning	FFC	Marion, Talbot	36 min
Jul 15, 3:21 PM EDT	Special Weather Statement	FFC	Dooly	24 min
Jul 15, 3:40 PM EDT	Severe Thunderstorm Warning	FFC	Cherokee	35 min
Jul 15, 3:42 PM EDT	Severe Thunderstorm Warning	FFC	Harris, Muscogee	33 min
Jul 15, 4:17 PM EDT	Special Weather Statement	FFC	Cherokee	28 min
Jul 15, 4:41 PM EDT	Severe Thunderstorm Warning	FFC	Clayton, Fayette, Fulton	23 min
Jul 15, 4:46 PM EDT	Severe Thunderstorm Warning	FFC	Fulton, Gwinnett	29 min
Jul 15, 4:55 PM EDT	Severe Thunderstorm Warning	FFC	Laurens	35 min
Jul 15, 4:57 PM EDT	Severe Thunderstorm Warning	FFC	Macon, Schley, Sumter	33 min
Jul 15, 4:59 PM EDT	Severe Thunderstorm Warning	FFC	Toombs	31 min
Jul 15, 5:14 PM EDT	Severe Thunderstorm Warning	FFC	Cobb, Fulton	31 min
Jul 15, 5:33 PM EDT	Severe Thunderstorm Warning	FFC	Lamar, Upson	27 min
Jul 15, 5:41 PM EDT	Special Weather Statement	FFC	Taylor	34 min
Jul 15, 5:51 PM EDT	Severe Thunderstorm Warning	FFC	Troup	24 min
Jul 15, 6:14 PM EDT	Special Weather Statement	FFC	Upson	31 min
Jul 15, 6:24 PM EDT	Special Weather Statement	FFC	Monroe	36 min
Jul 15, 6:31 PM EDT	Severe Thunderstorm Warning	FFC	Fayette, Lamar, Pike, Spalding, Upson	44 min
Jul 15, 6:47 PM EDT	Severe Thunderstorm Warning	FFC	Emanuel, Johnson, Laurens, Treutlen	28 min
Jul 15, 6:52 PM EDT	Special Weather Statement	FFC	Heard	38 min
Jul 15, 7:09 PM EDT	Special Weather Statement	FFC	Monroe	36 min
Jul 15, 7:15 PM EDT	Severe Thunderstorm Warning	FFC	Dodge, Pulaski, Wilcox	30 min
Jul 15, 7:18 PM EDT	Severe Thunderstorm Warning	FFC	Bibb, Jones, Monroe	27 min
Jul 15, 7:23 PM EDT	Special Weather Statement	FFC	Fayette, Spalding	37 min
Jul 15, 7:30 PM EDT	Severe Thunderstorm Warning	FFC	Dooly, Houston, Pulaski	45 min
Jul 15, 7:33 PM EDT	Severe Thunderstorm Warning	FFC	Meriwether	42 min
Jul 15, 7:56 PM EDT	Special Weather Statement	FFC	Jones	34 min

Nearby

Special Weather Statements in Georgia, 2020 Every special weather statement in 2020

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.