Alert archive / Georgia / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 245, NWS Atlanta, GA

July 21, 20186 counties in Georgia

NWS Atlanta, GA issued this severe thunderstorm warning at Jul 21, 2018, 5:44 AM EDT for 6 counties in Georgia. It was in force for 46 min. 17 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Jul 21, 2018, 5:44 AM EDT (09:44 UTC)
Expired
Jul 21, 2018, 6:30 AM EDT
In force
46 min
Issued by
NWS Atlanta, GA
Area
Storm-based polygon
Hail
1.5 in
Wind
60.0 mph

Counties Cherokee County, GA, Dawson County, GA, Forsyth County, GA, Gwinnett County, GA, Hall County, GA, Pickens County, GA

The radar

The Atlanta radar (KFFC), 110 km from the middle of the area, began a volume at 09:44 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.

What was reported inside it

TimeReportWhereRemark
Jul 21, 5:44 AM EDTTSTM WND DMG1 Ene Gainesville, GATREES AND POWER LINES WERE REPORTED DOWN IN THE ROADWAY ON HIGHWAY 129 AT SOUTH ENOTA DRIVE.
Jul 21, 5:49 AM EDTHAIL 11 N Ball Ground, GAHAIL QUARTER SIZED AND SLIGHTLY LARGER WAS REPORTED IN THE 1500 BLOCK OF OLD CANTON ROAD.
Jul 21, 5:54 AM EDTTSTM WND DMG3 Nne Lathemtown, GAMULTIPLE TREES WERE REPORTED DOWN ON POWER LINES NEAR THE INTERSECTION OF HIGHTOWER ROAD AND YELLOW CREEK ROAD.
Jul 21, 5:54 AM EDTTSTM WND DMG3 Nne Lathemtown, GAMULTIPLE TREES WERE REPORTED DOWN ON POWER LINES NEAR THE INTERSECTION OF HIGHTOWER ROAD AND YELLOW CREEK ROAD. MULTIPLE TREES WERE ALSO REPORTED DOWN JUST OVER THE COUNTY LINE INTO FORSYTH.
Jul 21, 5:54 AM EDTTSTM WND DMG3 W Hightower, GAA TREE WAS REPORTED DOWN NEAR THE INTERSECTION OF YELLOW CREEK ROAD AND WOODHAVEN LANE.
Jul 21, 5:55 AM EDTTSTM WND DMG1 Se Mckee, GAINITIAL EM REPORT OF MULTIPLE TREES DOWN AND SOME STRUCTURAL DAMAGE NEAR THE INTERSECTION OF GA HWY 9 AND HWY 136. TIME ESTIMATED FROM RADAR.
Jul 21, 6:05 AM EDTTSTM WND DMG2 Ne Drew, GATHIRTY TREES WERE REPORTED DOWN IN THE SAWNEE VIEW FARMS NEIGHBORHOOD WITH DAMAGE TO MULTIPLE HOMES.
Jul 21, 6:05 AM EDTHAIL 12 Ne Drew, GAQUARTER INCH HAIL WAS REPORTED IN THE SAWNEE VIEW FARMS NEIGHBORHOOD OFF OD BETHELVIEW ROADAND SAWNEE VIEW DRIVE.
Jul 21, 6:06 AM EDTTSTM WND DMG3 Ene Milton, GADAMAGE WAS REPORTED TO THE TEXACO GAS STATION ROOF ALONG ATLANTA HIGHWAY NEAR HAMBY ROAD.
Jul 21, 6:10 AM EDTTSTM WND DMG2 E Drew, GASEVERAL TREES DOWN ALONG JOHNSON ROAD, JUST WEST OF CUMMING. SOCIAL MEDIA REPORT WITH PICS. TIME ESTIMATED FROM RADAR.
Jul 21, 6:10 AM EDTTSTM WND DMG2 E Ducktown, GASPOTTER REPORT, WITH VISUAL EVIDENCE, OF GAS STATION CANOPY BLOWN OVER ALONG HWY 20 AND BETHELVIEW ROAD, WEST OF CUMMING. TIME ESTIMATED FROM RADAR.
Jul 21, 6:10 AM EDTTSTM WND DMG2 Ssw Cumming, GAA TREE WAS REPORTED DOWN BLOCKING THE LANE ON HIGHWAY 9 AT GREYSTONE SUMMIT DRIVE.
Jul 21, 6:10 AM EDTTSTM WND DMG2 Wnw Cumming, GANUMEROUS REPORTS OF TREES AND POWER LINES DOWN WEST OF CUMMING. SPECIFICALLY IN THE AREAS OF CHAMBLEE GAP ROAD, GREYSTONE PLACE, HICKORY COURT. REPORTS OF TREES ON A CAR AS WELL AS A HOUSE.
Jul 21, 6:10 AM EDTTSTM WND DMG4 Ne Brookwood, GAMULTIPLE TREES WERE REPORTED DOWN NEAR UNION ROAD AND BRANDYWINE CIRCLE WITH 3 REPORTS OF TREES ON HOUSES.
Jul 21, 6:15 AM EDTHAIL 1Buford Dam-Lake Lanier, GAQUARTER SIZED HAIL WAS REPORTED BY THE BUFORD DAM PARK.
Jul 21, 6:18 AM EDTTSTM WND DMG2 N Suwanee, GAMULTIPLE TREES AND POWER LINES WERE REPORTED DOWN WITH ONE TREE ON A TRUCK AND A TREE ON A HOUSE NEAR THE INTERSECTION OF PRICE HILLS TRAIL AND WEST PRICE ROAD. PEA SIZED HAIL WAS ALSO REPORTED.
Jul 21, 6:33 AM EDTTSTM WND DMG4 Nw Lawrenceville, GAREPORT OF TREE DOWN ON BACK DECK AND ROOF OF HOME ALONG SUWANEE VALLEY ROAD. TIME ESTIMATED FROM RADAR.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 16 storm reports to this severe thunderstorm warning; the first came 0 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jul 21, 3:00 AM EDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 9.7 hours before the alert went out and 107 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-pSkew-T log-p diagram, Peachtre/Fal Fld, GA at 00:00Z on 2018-07-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 116 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Peachtre/Fal Fld, GA at 00:00Z on 2018-07-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -25 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
116 J/kg
Mixed-layer CIN
-123 J/kg
Mixed-layer LCL
1353 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
-25 m²/s²
0-3 km storm-relative helicity
16 m²/s²
Significant tornado parameter
-0.0
Supercell composite
-0.8

Open this sounding in Storm Lab

The text

As transmitted.

028 
WUUS52 KFFC 210944
SVRFFC
GAC057-085-117-135-139-227-211030-
/O.NEW.KFFC.SV.W.0245.180721T0944Z-180721T1030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Peachtree City GA
544 AM EDT SAT JUL 21 2018

The National Weather Service in Peachtree City has issued a

* Severe Thunderstorm Warning for...
  Northeastern Cherokee County in north central Georgia...
  Forsyth County in north central Georgia...
  Northeastern Gwinnett County in north central Georgia...
  Dawson County in north central Georgia...
  Hall County in north central Georgia...
  Southeastern Pickens County in north central Georgia...

* Until 630 AM EDT.

* At 544 AM EDT, severe thunderstorms were located along a line
  extending from near Amicalola Falls State Park to Hollis Lathem
  Reservoir to near Buffington, moving southeast at 50 mph.

  HAZARD...Ping pong ball size hail and 60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           wind damage to roofs, siding, and trees.

* Locations impacted include...
  Gainesville, Lawrenceville, Canton, Cumming, Dawsonville, Sugar
  Hill, Suwanee, Buford, Braselton, Flowery Branch, Oakwood, Ball
  Ground, Nelson, Rest Haven, Free Home, Buffington, Dougherty,
  Candler, Drew and Buford Dam-Lake Lanier Parks.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

If you see wind damage...hail or flooding...wait until the storm has
passed...and then call the National Weather Service toll free
at 1 8 6 6 7 6 3 4 4 6 6 or tweet us your report at NWSATLANTA.

&&

LAT...LON 3452 8416 3447 8410 3446 8410 3442 8397
      3443 8397 3429 8367 3417 8377 3413 8382
      3409 8383 3397 8403 3403 8412 3405 8410
      3407 8417 3413 8426 3419 8426 3418 8433
      3431 8452 3444 8440 3458 8430
TIME...MOT...LOC 0944Z 301DEG 41KT 3454 8419 3439 8429 3427 8443 

HAIL...1.50IN
WIND...60MPH
 
$$
1 follow-up statement
345 
WWUS52 KFFC 211004
SVSFFC

Severe Weather Statement
National Weather Service Peachtree City GA
604 AM EDT SAT JUL 21 2018

GAC057-085-227-211013-
/O.CAN.KFFC.SV.W.0245.000000T0000Z-180721T1030Z/
Cherokee GA-Dawson GA-Pickens GA-
604 AM EDT SAT JUL 21 2018

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN CHEROKEE...DAWSON
AND SOUTHEASTERN PICKENS COUNTIES IS CANCELLED...

The storms which prompted the warning have weakened or moved out of 
the warned area. Therefore, the warning has been cancelled. Very 
heavy rainfall has occurred in Dawson county overnight. Be very 
cautious if driving on roads this morning. Never drive through 
running water of unknown depth.

A Severe Thunderstorm Watch remains in effect until 1000 AM EDT for
north central Georgia.

LAT...LON 3419 8384 3403 8393 3397 8403 3403 8412
      3405 8410 3407 8417 3413 8426 3427 8426
      3434 8422 3434 8413
TIME...MOT...LOC 1003Z 311DEG 37KT 3427 8419 3417 8426 

$$

GAC117-135-139-211030-
/O.CON.KFFC.SV.W.0245.000000T0000Z-180721T1030Z/
Forsyth GA-Gwinnett GA-Hall GA-
604 AM EDT SAT JUL 21 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 AM EDT
FOR FORSYTH...NORTHEASTERN GWINNETT AND SOUTHWESTERN HALL COUNTIES...

At 603 AM EDT, severe thunderstorms were located along a line
extending from near Hightower to near Holbrook, moving southeast at
40 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Lawrenceville, Cumming, Sugar Hill, Suwanee, Buford, Flowery Branch,
Oakwood, Rest Haven, Drew, Buford Dam-Lake Lanier Parks, Coal
Mountain, Brookwood, Hightower, Matt, Aqualand Park, Oscarville,
Ducktown, Lake Lanier Islands and Hog Mountain.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 3419 8384 3403 8393 3397 8403 3403 8412
      3405 8410 3407 8417 3413 8426 3427 8426
      3434 8422 3434 8413
TIME...MOT...LOC 1003Z 311DEG 37KT 3427 8419 3417 8426 

HAIL...1.00IN
WIND...60MPH
 
$$

What forecasters said that day

The local office's own words before this severe thunderstorm warning 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 severe thunderstorm warning went out at Jul 21, 4:10 AM EDT, 1 hour 34 minutes earlier.

Area forecast discussion, Jul 21, 4:10 AM EDT, 1 hour 34 minutes before
Area Forecast Discussion
National Weather Service Peachtree City GA
410 AM EDT Sat Jul 21 2018

...Severe Thunderstorm Watch In Effect Until 10AM...

.SHORT TERM /Today through Sunday/...
Severe thunderstorm event ongoing this evening as outflow driven
complex moves out of the Tennessee Valley and into the local area.
Impressive cold pool driving this activity with temperatures in
the mid 60s in it's wake, not too bad for this time of year.
Outflow over Tennessee is moving SW which should allow western
tier counties to get in on the act before the night is through and
current severe thunderstorm watch configuration handles this well.

Not a ton of instability to work with but temps aloft continue to
cool with -10C values creeping into far north GA at 500 mb. May
prove to be more difficult for MCS to maintain itself once it gets
to the metro and Central GA, but given the strength of
aforementioned cold pool and the fact that NW flow events are over
achievers typically, will continue high pop and svr wording for
most of the area.

This first wave is sure to disrupt the environment for a time this
morning and perhaps into the early afternoon, increasing the
uncertainty for timing of additional storms. NAMNest which has had
the best handle on this activity tonight shows a decent break in
activity for the remainder of the day once this initial activity
clears. In fact , it is Sat evening before next wave enters and
sparks additional strong to severe storm development. Leaned this
way in the grids although keep some form of pops through the
entire day given the uncertainty.

Upper low continues to move southward over the local area through
Sunday with cold temps aloft for this time of year continuing.
Impulses will traverse the overall trough from time to time with
continued timing issues but chances of seeing a cluster move
across most of the area sometime on Sunday looks high.

Deese

.LONG TERM /Sunday Night through Friday/...
The forecast area will be under the influence of an upper level
trough/Low pressure system during the long term that is forecast
to hang around through Wednesday before weakening on Thursday with
generally weak WNW flow aloft predominating Thursday and Friday.

Plenty of moisture and instability will be associated with the low
pressure/trough system allowing for scattered to numerous showers
and thunderstorms.

Forecast High temperatures will run a few to several degrees below
normal through Wednesday and then close to normal Thursday and Friday.
Forecast low temperatures are running close to normal.

BDL

&&

.AVIATION...
06Z UPDATE...

Much of this forecast will depend upon evolution of a series of
storm systems to affect the area over the next 36 hours. The
first of these is moving through NE GA currently with a second
moving in from Kentucky. Have inserted a TEMPO for ATL area sites
but recent indications are first system may miss to the east.
Timing is very difficulty with these systems but have inserted a
separate Prob30 for late afternoon for possible re-development of
storms. Wind calm currently over ATL but should shift to west
with time this morning and remain there for the remainder of this
TAF cycle.

//ATL CONFIDENCE...06Z UPDATE...

Medium on TSRA chances and timing.
High on remaining elements.

Deese

&&

.PRELIMINARY POINT TEMPS/POPS...
Athens          88  70  88  69 /  60  50  30  30
Atlanta         89  72  88  70 /  70  50  40  30
Blairsville     82  64  79  63 /  60  50  60  40
Cartersville    89  69  87  68 /  70  50  50  30
Columbus        92  74  92  72 /  40  40  30  30
Gainesville     86  69  85  68 /  70  50  40  30
Macon           90  72  91  70 /  50  40  30  30
Rome            90  69  87  68 /  70  40  50  30
Peachtree City  90  71  89  69 /  70  40  30  30
Vidalia         91  74  91  73 /  40  40  40  40

&&

.FFC WATCHES/WARNINGS/ADVISORIES...
Severe Thunderstorm Watch until 10 AM EDT this morning for the
following zones: Baldwin...Banks...Barrow...Bartow...Bibb...
Butts...Carroll...Catoosa...Chattooga...Cherokee...Clarke...
Clayton...Cobb...Coweta...Crawford...Dade...Dawson...DeKalb...
Douglas...Fannin...Fayette...Floyd...Forsyth...Gilmer...Gordon...
Greene...Gwinnett...Hall...Hancock...Haralson...Harris...Heard...
Henry...Jackson...Jasper...Jones...Lamar...Lumpkin...Madison...
Meriwether...Monroe...Morgan...Murray...Newton...North Fulton...
Oconee...Oglethorpe...Paulding...Pickens...Pike...Polk...
Putnam...Rockdale...South Fulton...Spalding...Talbot...Troup...
Twiggs...Union...Upson...Walker...Walton...Washington...White...
Whitfield...Wilkinson.

&&

SHORT TERM...Deese
LONG TERM....BDL
AVIATION...Deese
Hazardous weather outlook, Jul 21, 4:35 AM EDT, 1 hour 9 minutes before
Hazardous Weather Outlook
National Weather Service Peachtree City GA
435 AM EDT Sat Jul 21 2018

GAZ001>009-011>016-019>025-027-030>039-041>062-066>076-078>086-
089>098-102>113-221000-
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-
435 AM EDT Sat Jul 21 2018

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

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

Scattered to numerous thunderstorms are expected across
the area today and tonight. Isolated to scattered severe storms
can be expected. The most likely hazards will be damaging winds,
large hail, frequent lightning and minor flooding from heavy
rainfall.
A tornado can not be ruled out.

.DAYS TWO THROUGH SEVEN...Sunday through Friday...

Scattered to numerous thunderstorms can be expected Sunday
through Friday. A few storms could be strong to severe on any
day with the main hazards being strong gusty winds, frequent
lightning and minor flooding from heavy rainfall.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not requested at this time, but spotters are
encouraged to submit storm/damage reports through the web by going
to www.weather.gov/atlanta.

In the hours before

Special weather statement, Jul 21, 4:04 AM EDT, 1 hour 40 minutes before
Special Weather Statement
National Weather Service Peachtree City GA
404 AM EDT SAT JUL 21 2018

GAZ002>005-210830-
Whitfield GA-Catoosa GA-Walker GA-Murray GA-
404 AM EDT SAT JUL 21 2018

...SIGNIFICANT WEATHER ADVISORY FOR WHITFIELD...CATOOSA...NORTHERN
WALKER AND NORTHERN MURRAY COUNTIES UNTIL 430 AM EDT...

At 404 AM EDT...a line of strong thunderstorms was along a line
extending from Flint Springs to near Dawnville to Boynton...and
moving southeast at 45 mph.

  HAZARD...40 to 50 mph wind...pea 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
Dalton, Chatsworth, Ringgold, Fort Oglethorpe, Varnell, Eton, Tunnel
Hill, Cohutta, Crandall, Sumac, Gregory, Blue Spring, Fairview,
Conasauga Lake, Beaverdale, Fort Mountain State Park, Indian Springs,
Wood Station, Rocky Face and Graysville.

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 3499 8468 3496 8462 3495 8462 3471 8470
      3473 8508 3497 8536 3499 8513
TIME...MOT...LOC 0804Z 300DEG 41KT 3502 8492 3484 8494 3492 8521

HAIL...0.25IN
WIND...50MPH
Special weather statement, Jul 21, 4:33 AM EDT, 1 hour 11 minutes before
Special Weather Statement
National Weather Service Peachtree City GA
433 AM EDT SAT JUL 21 2018

GAZ001>004-210900-
Whitfield GA-Catoosa GA-Walker GA-Dade GA-
433 AM EDT SAT JUL 21 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN WHITFIELD...
CATOOSA...NORTHERN WALKER AND NORTHERN DADE COUNTIES UNTIL 500 AM
EDT...

At 432 AM EDT...a line of strong thunderstorms was along a line
extending from Blue Spring to Cole City...and moving southeast at 65
mph.

  HAZARD...40 to 50 mph wind...pea 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
Dalton, Ringgold, Trenton, Fort Oglethorpe, Rossville, Chickamauga,
Lookout Mountain, Tunnel Hill, Blue Spring, Fairview, Chattanooga
Valley, Cloudland Canyon State Park, Hooker, Cooper Heights, Rock
Spring, Noble, Lakeview, Indian Springs, Wood Station and Graysville.

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 3498 8543 3499 8522 3498 8514 3469 8496
      3480 8548 3490 8559 3498 8560
TIME...MOT...LOC 0832Z 298DEG 57KT 3489 8522 3499 8559

HAIL...0.25IN
WIND...50MPH
Special weather statement, Jul 21, 4:56 AM EDT, 48 minutes before
Special Weather Statement
National Weather Service Peachtree City GA
456 AM EDT SAT JUL 21 2018

GAZ001>004-210930-
Whitfield GA-Catoosa GA-Walker GA-Dade GA-
456 AM EDT SAT JUL 21 2018

...SIGNIFICANT WEATHER ADVISORY FOR WESTERN WHITFIELD...SOUTHWESTERN
CATOOSA...WALKER AND DADE COUNTIES UNTIL 530 AM EDT...

At 456 AM EDT...a strong thunderstorm was near Morganville, or near
Trenton...moving southeast at 30 mph.

  HAZARD...40 to 50 mph wind...up to penny sized hail...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
Dalton, Lafayette, Trenton, Fort Oglethorpe, Chickamauga, Lookout
Mountain, Blue Spring, Fairview, Linwood, Villanow, Chattanooga
Valley, Cloudland Canyon State Park, Hooker, Cooper Heights, Rock
Spring, Naomi, Rising Fawn, Noble, Wood Station and Cole City.

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 3498 8527 3476 8499 3465 8512 3465 8540
      3479 8557 3498 8560
TIME...MOT...LOC 0856Z 311DEG 25KT 3490 8541

HAIL...0.75IN
WIND...50MPH
Special weather statement, Jul 21, 5:14 AM EDT, 30 minutes before
Special Weather Statement
National Weather Service Peachtree City GA
514 AM EDT SAT JUL 21 2018

GAZ014-015-022-023-210945-
Hall GA-Dawson GA-Forsyth GA-Lumpkin GA-
514 AM EDT SAT JUL 21 2018

...SIGNIFICANT WEATHER ADVISORY FOR HALL...SOUTHEASTERN DAWSON...
NORTHEASTERN FORSYTH AND SOUTHERN LUMPKIN COUNTIES UNTIL 545 AM
EDT...

At 514 AM EDT...a strong thunderstorm was over Dougherty, or near
Dawsonville...moving southeast at 25 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
Gainesville, Flowery Branch, Oakwood, Dougherty, Aqualand Park,
Chestatee, Oscarville, War Hill Park and Murrayville.

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 3440 8414 3447 8399 3430 8371 3416 8397
TIME...MOT...LOC 0914Z 315DEG 23KT 3440 8404

WIND...40MPH
Special weather statement, Jul 21, 5:16 AM EDT, 28 minutes before
Special Weather Statement
National Weather Service Peachtree City GA
516 AM EDT SAT JUL 21 2018

GAZ025-036-038-210945-
Jackson GA-Oglethorpe GA-Clarke GA-
516 AM EDT SAT JUL 21 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN JACKSON...
NORTHWESTERN OGLETHORPE AND CLARKE COUNTIES UNTIL 545 AM EDT...

At 516 AM EDT...a strong thunderstorm was near Westgate Park, or 7
miles southeast of Jefferson...moving southeast at 35 mph.

  HAZARD...40 to 50 mph wind...up to penny sized hail...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
Lexington, Athens, Winterville, Crawford, Arnoldsville, Athens-Clarke
County, Whitehall, Westgate Park, James Holland Youth Sports Cmpx,
Beechwood Hills, Sandy Creek Recreation Area, Oconee Heights,
Hutchings, Barretts Mill, Dunlap and State Botanical Garden Of Ga.

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 3382 8312 3380 8329 3381 8330 3385 8328
      3386 8333 3387 8333 3387 8336 3392 8341
      3392 8343 3403 8356 3410 8347 3406 8338
      3405 8339 3400 8328 3400 8325 3391 8305
TIME...MOT...LOC 0916Z 310DEG 32KT 3404 8347

HAIL...0.75IN
WIND...50MPH
Special weather statement, Jul 21, 5:37 AM EDT, 7 minutes before
Special Weather Statement
National Weather Service Peachtree City GA
537 AM EDT SAT JUL 21 2018

GAZ012-020-211000-
Gordon GA-Bartow GA-
537 AM EDT SAT JUL 21 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN GORDON AND EASTERN
BARTOW COUNTIES UNTIL 600 AM EDT...

At 537 AM EDT...a strong thunderstorm was over Sonoraville, or 7
miles southeast of Calhoun...moving southeast at 50 mph.

  HAZARD...40 to 50 mph wind...up to penny sized hail...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
Cartersville, Calhoun, Adairsville, Emerson, White, Cassville,
Sonoraville, Pine Log, Red Top Mountain State Park and Folsom.

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 3450 8478 3424 8465 3415 8466 3410 8485
      3446 8494
TIME...MOT...LOC 0937Z 335DEG 44KT 3443 8486

HAIL...0.75IN
WIND...50MPH

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 21, 1:20 AM EDTSevere Thunderstorm WarningFFCFannin55 min
Jul 21, 2:07 AM EDTSpecial Weather StatementFFCUnion38 min
Jul 21, 2:32 AM EDTSevere Thunderstorm WarningFFCFannin, Gilmer, Murray43 min
Jul 21, 2:39 AM EDTSpecial Weather StatementFFCTowns, Union36 min
Jul 21, 2:50 AM EDTSevere Thunderstorm WarningFFCLumpkin, Towns, Union, White40 min
Jul 21, 2:58 AM EDTSevere Thunderstorm WarningFFCFannin, Gilmer, Murray, Whitfield47 min
Jul 21, 3:04 AM EDTSevere Thunderstorm WarningFFCDawson, Fannin, Gilmer, Hall, Lumpkin, Pickens and 1 more41 min
Jul 21, 3:22 AM EDTSpecial Weather StatementFFCWhite23 min
Jul 21, 3:41 AM EDTSevere Thunderstorm WarningFFCBanks, Dawson, Forsyth, Hall, Lumpkin49 min
Jul 21, 3:46 AM EDTSevere Thunderstorm WarningFFCGilmer, Murray44 min
Jul 21, 4:01 AM EDTSpecial Weather StatementFFCMurray59 min
Jul 21, 4:04 AM EDTSpecial Weather StatementFFCCatoosa, Murray, Whitfield26 min
Jul 21, 4:27 AM EDTSevere Thunderstorm WarningFFCCatoosa, Gilmer, Murray, Whitfield48 min
Jul 21, 4:29 AM EDTSevere Thunderstorm WarningFFCDawson, Gilmer, Lumpkin, Pickens46 min
Jul 21, 4:31 AM EDTSevere Thunderstorm WarningFFCBarrow, Hall, Jackson44 min
Jul 21, 4:33 AM EDTSpecial Weather StatementFFCCatoosa, Dade27 min
Jul 21, 4:41 AM EDTFlash Flood WarningFFCFannin, Gilmer, Murray6 hr
Jul 21, 4:56 AM EDTSpecial Weather StatementFFCDade, Walker34 min
Jul 21, 5:09 AM EDTSevere Thunderstorm WarningFFCBartow, Cherokee, Gilmer, Gordon, Murray, Pickens51 min
Jul 21, 5:14 AM EDTSpecial Weather StatementFFCHall31 min
Jul 21, 5:16 AM EDTSpecial Weather StatementFFCClarke29 min
Jul 21, 5:37 AM EDTSpecial Weather StatementFFCBartow23 min
Jul 21, 5:50 AM EDTSpecial Weather StatementFFCBartow, Chattooga, Cherokee, Floyd25 min
Jul 21, 6:06 AM EDTSpecial Weather StatementFFCGwinnett24 min
Jul 21, 6:10 AM EDTSevere Thunderstorm WarningFFCCherokee, Cobb, DeKalb, Fulton50 min
Jul 21, 6:17 AM EDTSpecial Weather StatementFFCPolk28 min
Jul 21, 6:19 AM EDTSpecial Weather StatementFFCCobb, Paulding26 min
Jul 21, 6:25 AM EDTSevere Thunderstorm WarningFFCBarrow, Gwinnett, Hall, Jackson, Oconee, Walton50 min
Jul 21, 6:29 AM EDTSpecial Weather StatementFFCJackson31 min
Jul 21, 6:41 AM EDTSpecial Weather StatementFFCDouglas, Haralson34 min
Jul 21, 6:46 AM EDTSpecial Weather StatementFFCDeKalb, Fulton, Rockdale29 min
Jul 21, 7:03 AM EDTSevere Thunderstorm WarningFFCGreene, Jasper, Morgan, Newton, Putnam, Walton42 min
Jul 21, 7:12 AM EDTSpecial Weather StatementFFCClayton, Henry, Newton, Rockdale33 min
Jul 21, 7:14 AM EDTSpecial Weather StatementFFCCarroll, Douglas, Fayette31 min
Jul 21, 7:38 AM EDTSpecial Weather StatementFFCPutnam37 min
Jul 21, 7:41 AM EDTSpecial Weather StatementFFCButts, Jasper, Spalding34 min
Jul 21, 7:43 AM EDTSpecial Weather StatementFFCCoweta, Heard32 min
Jul 21, 8:00 AM EDTSpecial Weather StatementFFCBaldwin, Jones, Lamar, Monroe30 min
Jul 21, 8:03 AM EDTSpecial Weather StatementFFCMeriwether, Pike27 min
Jul 21, 8:08 AM EDTSpecial Weather StatementFFCHancock37 min
Jul 21, 8:24 AM EDTSpecial Weather StatementFFCBaldwin, Bibb, Twiggs, Wilkinson36 min
Jul 21, 8:26 AM EDTSpecial Weather StatementFFCHarris, Meriwether, Pike, Talbot, Troup, Upson34 min
Jul 21, 8:33 AM EDTRiver Flood WarningFFCGwinnett78 min
Jul 21, 9:01 AM EDTSpecial Weather StatementFFCBleckley29 min
Jul 21, 9:05 AM EDTSpecial Weather StatementFFCCrawford, Harris, Talbot, Taylor25 min
Jul 21, 9:32 AM EDTSpecial Weather StatementFFCChattahoochee, Harris, Houston, Macon, Marion, Muscogee and 3 more28 min
Jul 21, 9:34 AM EDTSpecial Weather StatementFFCBleckley, Dodge, Johnson, Laurens, Treutlen26 min
Jul 21, 9:39 AM EDTSevere Thunderstorm WarningFFCMacon, Schley, Taylor51 min
Jul 21, 9:59 AM EDTSpecial Weather StatementFFCChattahoochee, Dooly, Macon, Marion, Muscogee, Pulaski and 1 more31 min
Jul 21, 10:00 AM EDTSpecial Weather StatementFFCDodge, Montgomery, Wheeler30 min
Jul 21, 10:08 AM EDTSevere Thunderstorm WarningFFCDooly, Macon, Sumter52 min
Jul 21, 10:15 AM EDTSevere Thunderstorm WarningFFCSumter45 min
Jul 21, 10:20 AM EDTSpecial Weather StatementFFCWebster25 min
Jul 21, 10:23 AM EDTSpecial Weather StatementFFCTelfair37 min
Jul 21, 10:37 AM EDTSpecial Weather StatementFFCCrisp, Wilcox53 min
Jul 21, 10:48 AM EDTSpecial Weather StatementFFCWebster12 min
Jul 21, 5:32 PM EDTSpecial Weather StatementFFCCarroll, Haralson, Heard43 min
Jul 21, 5:34 PM EDTSevere Thunderstorm WarningFFCHaralson41 min
Jul 21, 5:44 PM EDTSevere Thunderstorm WarningFFCCarroll, Haralson, Heard34 min
Jul 21, 5:53 PM EDTSevere Thunderstorm WarningFFCHeard52 min
Jul 21, 5:57 PM EDTSpecial Weather StatementFFCTroup33 min
Jul 21, 6:00 PM EDTSevere Thunderstorm WarningFFCCarroll, Douglas, Fulton30 min
Jul 21, 6:01 PM EDTSevere Thunderstorm WarningFFCCatoosa, Whitfield29 min
Jul 21, 6:03 PM EDTSevere Thunderstorm WarningFFCHarris, Troup42 min
Jul 21, 6:06 PM EDTSpecial Weather StatementFFCFloyd24 min
Jul 21, 6:29 PM EDTSpecial Weather StatementFFCHeard31 min
Jul 21, 6:31 PM EDTSpecial Weather StatementFFCMurray29 min
Jul 21, 6:34 PM EDTSpecial Weather StatementFFCMeriwether26 min
Jul 21, 6:36 PM EDTSpecial Weather StatementFFCDouglas24 min
Jul 21, 6:43 PM EDTSevere Thunderstorm WarningFFCCoweta, Meriwether, Troup32 min
Jul 21, 6:45 PM EDTSevere Thunderstorm WarningFFCClayton, DeKalb, Fulton45 min
Jul 21, 7:03 PM EDTSpecial Weather StatementFFCMurray42 min
Jul 21, 7:12 PM EDTSpecial Weather StatementFFCUnion33 min
Jul 21, 7:27 PM EDTSpecial Weather StatementFFCDeKalb, Rockdale33 min
Jul 21, 7:29 PM EDTSevere Thunderstorm WarningFFCDeKalb, Gwinnett, Newton, Rockdale, Walton46 min
Jul 21, 7:30 PM EDTSpecial Weather StatementFFCChattahoochee, Muscogee30 min
Jul 21, 7:46 PM EDTSevere Thunderstorm WarningFFCStewart44 min
Jul 21, 7:48 PM EDTSpecial Weather StatementFFCUnion42 min
Jul 21, 7:51 PM EDTSpecial Weather StatementFFCGwinnett24 min
Jul 21, 7:57 PM EDTSpecial Weather StatementFFCBartow, Floyd33 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2018Every severe thunderstorm warning in 2018

Sources

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