Alert archive / Georgia / Special Weather Statements in 2018

Special Weather Statement, NWS Atlanta, GA

July 21, 2018Chattahoochee County, Muscogee County, Georgia

NWS Atlanta, GA issued this special weather statement at Jul 21, 2018, 7:30 PM EDT for Chattahoochee County, Muscogee 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 21, 2018, 7:30 PM EDT (23:30 UTC)
Expired: Jul 21, 2018, 8:00 PM EDT
In force: 30 min
Issued by: NWS Atlanta, GA
Hail: 0.25 in
Wind: 50

Counties Chattahoochee County, GA, Muscogee County, GA

The radar

The Maxwell AFB radar (KMXX), 82 km from the middle of the area, began a volume at 23:30 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

Birmingham, AL (KBMX), launched 12:00Z, 11.5 hours before the alert went out and 194 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: 2831 J/kg
Mixed-layer CIN: -66 J/kg
Mixed-layer LCL: 906 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 245 m²/s²
0-3 km storm-relative helicity: 283 m²/s²
Significant tornado parameter: 3.6
Supercell composite: 24.7

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 21, 2:52 PM EDT, 4 hours 38 minutes earlier.

Area forecast discussion, Jul 21, 2:52 PM EDT, 4 hours 38 minutes before

Area Forecast Discussion
National Weather Service Peachtree City GA
252 PM EDT Sat Jul 21 2018

.SHORT TERM /Tonight through Sunday Night/...
Models not really handling the northwest flow pattern very well,
although the Hi-Res models at least appear to be trying. Atmosphere
over the CWA is recovering and expected mainly scattered development
for the rest of this afternoon and early tonight. All models show
another cold pool at 500mb and an associated short wave moving into
eastern TN and north GA by 12Z Sun. This will bring another chance
of showers/tstorms to north GA late tonight and across the CWA
Sunday. As this cold pool/short wave exits, the 500mb Low will move
over the TN Valley Sunday afternoon and Sunday night bringing
additional destabilization. This will increase the chance of
showers/tstorms again late Sunday night across mainly north GA.

17

.LONG TERM /Monday through Saturday/...
No major changes in the long term forecast. 500mb Low/Trough will
remain stationary over the CWA through the week keeping a
relatively cold core over the southeast. This will yield
scattered to numerous thunderstorms each day. Temps will remain at
or slightly below normal through the long term.

17

&&

.AVIATION... 18Z Update...
Convection has moved out, however scattered convection is
possible this afternoon as the atmosphere re-energizes with
heating. Convection will dissipate with lack of heating late this
evening. Another disturbance will move into north GA early Sunday
morning bringing another chance of convection. Most areas have
gone VFR with SCT035-055. Expect VFR conditions through the
forecast. Winds will be westerly through the forecast.

//ATL CONFIDENCE...18Z UPDATE...
Medium on TSRA chances and timing.
High on remaining elements.

17

&&

.PRELIMINARY POINT TEMPS/POPS...
Athens          71  88  69  85 /  40  50  60  70
Atlanta         72  87  70  85 /  40  50  60  70
Blairsville     64  79  63  79 /  40  60  70  70
Cartersville    70  86  68  85 /  40  50  60  70
Columbus        75  92  72  88 /  40  30  50  60
Gainesville     70  84  68  83 /  40  50  70  70
Macon           72  91  71  88 /  40  40  50  60
Rome            70  86  68  84 /  40  50  60  60
Peachtree City  71  88  69  86 /  40  40  50  60
Vidalia         74  91  73  89 /  30  30  40  60

&&

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

SHORT TERM...17
LONG TERM....17
AVIATION...17

Hazardous weather outlook, Jul 21, 5:49 PM EDT, 1 hour 41 minutes before

Hazardous Weather Outlook
National Weather Service Peachtree City GA
549 PM EDT Sat Jul 21 2018

GAZ001>009-011>016-019>025-027-030>039-041>062-066>076-078>086-
089>098-102>113-222200-
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-
549 PM EDT Sat Jul 21 2018

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

.DAY ONE...Tonight...

A Severe Thunderstorm Watch is in effect for much of north and
central Georgia until 2 AM Eastern Daylight Time. Scattered
thunderstorms are expected to redevelop across eastern Alabama and
western Georgia, and track southeast through the evening. Some
storms could be strong to severe, capable of producing large hail,
damaging winds in excess of 60 MPH, frequent lightning and very
heavy rain. The storms should diminish after midnight tonight.

.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, 7:03 PM EDT, 27 minutes before

Special Weather Statement
National Weather Service Peachtree City GA
703 PM EDT SAT JUL 21 2018

GAZ005-007-212345-
Gilmer GA-Murray GA-
703 PM EDT SAT JUL 21 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN GILMER AND EASTERN
MURRAY COUNTIES UNTIL 745 PM EDT...

At 703 PM EDT...a strong thunderstorm was over Eton, or near
Chatsworth...moving southeast at 15 mph.

  HAZARD...Up to 40 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 this storm include
Chatsworth, Eton, Mountaintown, Crandall, Fort Mountain State Park
and Tails Creek.

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 3480 8483 3488 8476 3482 8448 3465 8462
TIME...MOT...LOC 2303Z 302DEG 14KT 3482 8474

HAIL...0.25IN
WIND...40MPH

Local storm report, Jul 21, 7:07 PM EDT, 23 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
707 PM EDT SAT JUL 21 2018

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

0655 PM     HAIL             3 W EAST POINT          33.68N  84.49W
07/21/2018  E0.88 INCH       FULTON             GA   PUBLIC

            LASTED FOR ABOUT 4-5 MINUTES

&&

EVENT NUMBER FFC1800703

KS

Special weather statement, Jul 21, 7:12 PM EDT, 18 minutes before

Special Weather Statement
National Weather Service Peachtree City GA
712 PM EDT SAT JUL 21 2018

GAZ006-008-009-212345-
Union GA-Towns GA-Fannin GA-
712 PM EDT SAT JUL 21 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN UNION...NORTHWESTERN
TOWNS AND NORTHEASTERN FANNIN COUNTIES UNTIL 745 PM EDT...

At 711 PM EDT...a line of strong thunderstorms extended from
Copperhill to near Hot House to near Ivy Log...and moving southeast
at 30 mph.

  HAZARD...Up to 40 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
Blairsville, Young Harris, Morganton, Hemp, Gumlog, Nottely Dam, Ivy
Log, Loving, Jones Creek, Mineral Bluff, Alexanders Mill, Culberson,
Epworth and Copperhill.

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 3490 8375 3483 8400 3486 8423 3499 8445
      3499 8389
TIME...MOT...LOC 2311Z 307DEG 28KT 3499 8442 3498 8423 3502 8407

HAIL...0.25IN
WIND...40MPH

Local storm report, Jul 21, 7:20 PM EDT, 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
720 PM EDT SAT JUL 21 2018

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

0700 PM     HAIL             1 N COLLEGE PARK        33.67N  84.45W
07/21/2018  E1.00 INCH       FULTON             GA   PUBLIC

            PUBLIC REPORT OF QUARTER SIZED HAIL

&&

EVENT NUMBER FFC1800704

KS

Special weather statement, Jul 21, 7:27 PM EDT, 3 minutes before

Special Weather Statement
National Weather Service Peachtree City GA
727 PM EDT SAT JUL 21 2018

GAZ045-046-057-220000-
Rockdale GA-DeKalb GA-Henry GA-
727 PM EDT SAT JUL 21 2018

...SIGNIFICANT WEATHER ADVISORY FOR ROCKDALE...SOUTHEASTERN DEKALB
AND NORTHERN HENRY COUNTIES UNTIL 800 PM EDT...

At 727 PM EDT...a strong thunderstorm was over Belmont, or 8 miles
west of Conyers...moving east at 35 mph.

  HAZARD...40 to 50 mph wind...up to penny 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
Conyers, Lithonia, Lakeview Estates, Belvedere Park, Candler-Mcafee,
Milstead, Belmont, Richardson Park, Arabia Mountain, Redan, Hidden
Valley Park, Panola Mountain State Park and Snapfinger.

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 3378 8424 3379 8408 3378 8408 3375 8402
      3379 8398 3377 8395 3362 8396 3357 8400
      3360 8424
TIME...MOT...LOC 2327Z 271DEG 32KT 3369 8415

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

Special weather statement, Jul 21, 7:30 PM EDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 1:20 AM EDT	Severe Thunderstorm Warning	FFC	Fannin	55 min
Jul 21, 2:07 AM EDT	Special Weather Statement	FFC	Union	38 min
Jul 21, 2:32 AM EDT	Severe Thunderstorm Warning	FFC	Fannin, Gilmer, Murray	43 min
Jul 21, 2:39 AM EDT	Special Weather Statement	FFC	Towns, Union	36 min
Jul 21, 2:50 AM EDT	Severe Thunderstorm Warning	FFC	Lumpkin, Towns, Union, White	40 min
Jul 21, 2:58 AM EDT	Severe Thunderstorm Warning	FFC	Fannin, Gilmer, Murray, Whitfield	47 min
Jul 21, 3:04 AM EDT	Severe Thunderstorm Warning	FFC	Dawson, Fannin, Gilmer, Hall, Lumpkin, Pickens and 1 more	41 min
Jul 21, 3:22 AM EDT	Special Weather Statement	FFC	White	23 min
Jul 21, 3:41 AM EDT	Severe Thunderstorm Warning	FFC	Banks, Dawson, Forsyth, Hall, Lumpkin	49 min
Jul 21, 3:46 AM EDT	Severe Thunderstorm Warning	FFC	Gilmer, Murray	44 min
Jul 21, 4:01 AM EDT	Special Weather Statement	FFC	Murray	59 min
Jul 21, 4:04 AM EDT	Special Weather Statement	FFC	Catoosa, Murray, Whitfield	26 min
Jul 21, 4:27 AM EDT	Severe Thunderstorm Warning	FFC	Catoosa, Gilmer, Murray, Whitfield	48 min
Jul 21, 4:29 AM EDT	Severe Thunderstorm Warning	FFC	Dawson, Gilmer, Lumpkin, Pickens	46 min
Jul 21, 4:31 AM EDT	Severe Thunderstorm Warning	FFC	Barrow, Hall, Jackson	44 min
Jul 21, 4:33 AM EDT	Special Weather Statement	FFC	Catoosa, Dade	27 min
Jul 21, 4:41 AM EDT	Flash Flood Warning	FFC	Fannin, Gilmer, Murray	6 hr
Jul 21, 4:56 AM EDT	Special Weather Statement	FFC	Dade, Walker	34 min
Jul 21, 5:09 AM EDT	Severe Thunderstorm Warning	FFC	Bartow, Cherokee, Gilmer, Gordon, Murray, Pickens	51 min
Jul 21, 5:14 AM EDT	Special Weather Statement	FFC	Hall	31 min
Jul 21, 5:16 AM EDT	Special Weather Statement	FFC	Clarke	29 min
Jul 21, 5:37 AM EDT	Special Weather Statement	FFC	Bartow	23 min
Jul 21, 5:44 AM EDT	Severe Thunderstorm Warning	FFC	Cherokee, Dawson, Forsyth, Gwinnett, Hall, Pickens	46 min
Jul 21, 5:50 AM EDT	Special Weather Statement	FFC	Bartow, Chattooga, Cherokee, Floyd	25 min
Jul 21, 6:06 AM EDT	Special Weather Statement	FFC	Gwinnett	24 min
Jul 21, 6:10 AM EDT	Severe Thunderstorm Warning	FFC	Cherokee, Cobb, DeKalb, Fulton	50 min
Jul 21, 6:17 AM EDT	Special Weather Statement	FFC	Polk	28 min
Jul 21, 6:19 AM EDT	Special Weather Statement	FFC	Cobb, Paulding	26 min
Jul 21, 6:25 AM EDT	Severe Thunderstorm Warning	FFC	Barrow, Gwinnett, Hall, Jackson, Oconee, Walton	50 min
Jul 21, 6:29 AM EDT	Special Weather Statement	FFC	Jackson	31 min
Jul 21, 6:41 AM EDT	Special Weather Statement	FFC	Douglas, Haralson	34 min
Jul 21, 6:46 AM EDT	Special Weather Statement	FFC	DeKalb, Fulton, Rockdale	29 min
Jul 21, 7:03 AM EDT	Severe Thunderstorm Warning	FFC	Greene, Jasper, Morgan, Newton, Putnam, Walton	42 min
Jul 21, 7:12 AM EDT	Special Weather Statement	FFC	Clayton, Henry, Newton, Rockdale	33 min
Jul 21, 7:14 AM EDT	Special Weather Statement	FFC	Carroll, Douglas, Fayette	31 min
Jul 21, 7:38 AM EDT	Special Weather Statement	FFC	Putnam	37 min
Jul 21, 7:41 AM EDT	Special Weather Statement	FFC	Butts, Jasper, Spalding	34 min
Jul 21, 7:43 AM EDT	Special Weather Statement	FFC	Coweta, Heard	32 min
Jul 21, 8:00 AM EDT	Special Weather Statement	FFC	Baldwin, Jones, Lamar, Monroe	30 min
Jul 21, 8:03 AM EDT	Special Weather Statement	FFC	Meriwether, Pike	27 min
Jul 21, 8:08 AM EDT	Special Weather Statement	FFC	Hancock	37 min
Jul 21, 8:24 AM EDT	Special Weather Statement	FFC	Baldwin, Bibb, Twiggs, Wilkinson	36 min
Jul 21, 8:26 AM EDT	Special Weather Statement	FFC	Harris, Meriwether, Pike, Talbot, Troup, Upson	34 min
Jul 21, 8:33 AM EDT	River Flood Warning	FFC	Gwinnett	78 min
Jul 21, 9:01 AM EDT	Special Weather Statement	FFC	Bleckley	29 min
Jul 21, 9:05 AM EDT	Special Weather Statement	FFC	Crawford, Harris, Talbot, Taylor	25 min
Jul 21, 9:32 AM EDT	Special Weather Statement	FFC	Chattahoochee, Harris, Houston, Macon, Marion, Muscogee and 3 more	28 min
Jul 21, 9:34 AM EDT	Special Weather Statement	FFC	Bleckley, Dodge, Johnson, Laurens, Treutlen	26 min
Jul 21, 9:39 AM EDT	Severe Thunderstorm Warning	FFC	Macon, Schley, Taylor	51 min
Jul 21, 9:59 AM EDT	Special Weather Statement	FFC	Chattahoochee, Dooly, Macon, Marion, Muscogee, Pulaski and 1 more	31 min
Jul 21, 10:00 AM EDT	Special Weather Statement	FFC	Dodge, Montgomery, Wheeler	30 min
Jul 21, 10:08 AM EDT	Severe Thunderstorm Warning	FFC	Dooly, Macon, Sumter	52 min
Jul 21, 10:15 AM EDT	Severe Thunderstorm Warning	FFC	Sumter	45 min
Jul 21, 10:20 AM EDT	Special Weather Statement	FFC	Webster	25 min
Jul 21, 10:23 AM EDT	Special Weather Statement	FFC	Telfair	37 min
Jul 21, 10:37 AM EDT	Special Weather Statement	FFC	Crisp, Wilcox	53 min
Jul 21, 10:48 AM EDT	Special Weather Statement	FFC	Webster	12 min
Jul 21, 5:32 PM EDT	Special Weather Statement	FFC	Carroll, Haralson, Heard	43 min
Jul 21, 5:34 PM EDT	Severe Thunderstorm Warning	FFC	Haralson	41 min
Jul 21, 5:44 PM EDT	Severe Thunderstorm Warning	FFC	Carroll, Haralson, Heard	34 min
Jul 21, 5:53 PM EDT	Severe Thunderstorm Warning	FFC	Heard	52 min
Jul 21, 5:57 PM EDT	Special Weather Statement	FFC	Troup	33 min
Jul 21, 6:00 PM EDT	Severe Thunderstorm Warning	FFC	Carroll, Douglas, Fulton	30 min
Jul 21, 6:01 PM EDT	Severe Thunderstorm Warning	FFC	Catoosa, Whitfield	29 min
Jul 21, 6:03 PM EDT	Severe Thunderstorm Warning	FFC	Harris, Troup	42 min
Jul 21, 6:06 PM EDT	Special Weather Statement	FFC	Floyd	24 min
Jul 21, 6:29 PM EDT	Special Weather Statement	FFC	Heard	31 min
Jul 21, 6:31 PM EDT	Special Weather Statement	FFC	Murray	29 min
Jul 21, 6:34 PM EDT	Special Weather Statement	FFC	Meriwether	26 min
Jul 21, 6:36 PM EDT	Special Weather Statement	FFC	Douglas	24 min
Jul 21, 6:43 PM EDT	Severe Thunderstorm Warning	FFC	Coweta, Meriwether, Troup	32 min
Jul 21, 6:45 PM EDT	Severe Thunderstorm Warning	FFC	Clayton, DeKalb, Fulton	45 min
Jul 21, 7:03 PM EDT	Special Weather Statement	FFC	Murray	42 min
Jul 21, 7:12 PM EDT	Special Weather Statement	FFC	Union	33 min
Jul 21, 7:27 PM EDT	Special Weather Statement	FFC	DeKalb, Rockdale	33 min
Jul 21, 7:29 PM EDT	Severe Thunderstorm Warning	FFC	DeKalb, Gwinnett, Newton, Rockdale, Walton	46 min
Jul 21, 7:46 PM EDT	Severe Thunderstorm Warning	FFC	Stewart	44 min
Jul 21, 7:48 PM EDT	Special Weather Statement	FFC	Union	42 min
Jul 21, 7:51 PM EDT	Special Weather Statement	FFC	Gwinnett	24 min
Jul 21, 7:57 PM EDT	Special Weather Statement	FFC	Bartow, Floyd	33 min

Nearby

Special Weather Statements in Georgia, 2018 Every special weather statement 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.