Alert archive / Georgia / Special Weather Statements in 2018

Special Weather Statement, NWS Atlanta, GA

July 21, 2018Gilmer County, Georgia

NWS Atlanta, GA issued this special weather statement at Jul 21, 2018, 8:34 PM EDT for Gilmer County, Georgia. It was in force for 26 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, 8:34 PM EDT (00:34 UTC)
Expired: Jul 21, 2018, 9:00 PM EDT
In force: 26 min
Issued by: NWS Atlanta, GA
Hail: 0.25 in
Wind: 40

County Gilmer County, GA

The radar

The Atlanta radar (KFFC), 141 km from the middle of the area, began a volume at 00:38 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 00:00Z, 0.6 hours before the alert went out and 140 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: 2306 J/kg
Mixed-layer CIN: -28 J/kg
Mixed-layer LCL: 902 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: -14 m²/s²
0-3 km storm-relative helicity: 136 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.5

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, 8:02 PM EDT, 32 minutes earlier.

Area forecast discussion, Jul 21, 8:02 PM EDT, 32 minutes before

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

.UPDATE...
Updated for the 00Z Aviation Discussion.

&&

.PREV DISCUSSION... /Issued 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...
00Z Update...
Scattered convection is ongoing throughout north and central
Georgia, but is expected to dissipate late this evening with the
loss of daytime heating. Storms remain in the vicinity of the
northern metro TAF sites but are moving away from the southern
metro sites. Shower and thunderstorm activity is widespread near
CSG. Yet another disturbance will move into the area Sunday
morning which will bring about another round of scattered
convection in the afternoon. VFR cigs are expected through the
period at mainly SCT to BKN at 030-050. Winds will generally be W
through the period at generally less than 10 kts but could see
some gusts to 15-20 kts Sunday afternoon. Only exception to the W
winds will come from outflows of thunderstorms that occur.

King

//ATL Confidence...00Z Update...
Medium confidence on thunderstorm chances and timing.
High confidence on remaining elements.

King

&&

.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...
Severe Thunderstorm Watch until 2 AM EDT Sunday for the
following zones: Baldwin...Banks...Barrow...Bartow...Bibb...
Butts...Carroll...Chattahoochee...Chattooga...Cherokee...
Clarke...Clayton...Cobb...Coweta...Crawford...Dawson...DeKalb...
Douglas...Fannin...Fayette...Floyd...Forsyth...Gilmer...
Glascock...Gordon...Greene...Gwinnett...Hall...Hancock...
Haralson...Harris...Heard...Henry...Houston...Jackson...Jasper...
Jefferson...Jones...Lamar...Lumpkin...Macon...Madison...Marion...
Meriwether...Monroe...Morgan...Murray...Muscogee...Newton...
North Fulton...Oconee...Oglethorpe...Paulding...Peach...
Pickens...Pike...Polk...Putnam...Rockdale...Schley...South
Fulton...Spalding...Stewart...Sumter...Talbot...Taliaferro...
Taylor...Towns...Troup...Twiggs...Union...Upson...Walton...
Warren...Washington...Webster...White...Whitfield...Wilkes...
Wilkinson.

&&

SHORT TERM...King
LONG TERM....30
AVIATION...King

Hazardous weather outlook, Jul 21, 5:49 PM EDT, 2 hours 45 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

Local storm report, Jul 21, 8:16 PM EDT, 18 minutes before

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Special weather statement, Jul 21, 8:25 PM EDT, 9 minutes before

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Local storm report, Jul 21, 8:28 PM EDT, 6 minutes before

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

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

0813 PM     HAIL             1 SSE DACULA            33.97N  83.89W
07/21/2018  E2.50 INCH       GWINNETT           GA   PUBLIC

            NUMEROUS GOLF BALL HAIL STONES WITH SOME TENNIS BALL
            HAIL MIXED IN. HARBINS RD AND HWY 316. CONFIRMED BY
            ANOTHER REPORT IN THE AREA FROM A TRUSTED SOURCE.

&&

EVENT NUMBER FFC1800709

KS

Local storm report, Jul 21, 8:30 PM EDT, 4 minutes before

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

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

0811 PM     HAIL             2 NE LAWRENCEVILLE      33.97N  83.97W
07/21/2018  E1.75 INCH       GWINNETT           GA   SOCIAL MEDIA

            SOCIAL MEDIA PHOTO AND REPORT OF GOLF BALL HAIL NEAR
            THE LAWRENCEVILLE AIRPORT

&&

EVENT NUMBER FFC1800710

KS

Special weather statement, Jul 21, 8:31 PM EDT, 3 minutes before

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

GAZ020-021-031-032-220115-
Cobb GA-Cherokee GA-Bartow GA-Paulding GA-
831 PM EDT SAT JUL 21 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN COBB...SOUTHWESTERN
CHEROKEE...SOUTHERN BARTOW AND EASTERN PAULDING COUNTIES UNTIL 915 PM
EDT...

At 831 PM EDT...a strong thunderstorm was near Euharlee, or near
Cartersville...moving southeast at 25 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
Marietta, Cartersville, Dallas, Kennesaw, Woodstock, Acworth,
Euharlee, Hiram, Emerson, Cassville, Burnt Hickory Ridge, Sweat
Mountain, Kellogg Creek, Red Top Mountain State Park, Lost Mountain
Park, Oak Grove, Kennesaw State University, George Washington Carver
St Pk, Cross Roads and Due West.

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 3426 8485 3406 8442 3406 8443 3383 8482
      3404 8494 3408 8492 3408 8497 3415 8501
TIME...MOT...LOC 0031Z 319DEG 22KT 3415 8487

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

Special weather statement, Jul 21, 8:34 PM EDT, 0 minutes before

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

GAZ007-220100-
Gilmer GA-
834 PM EDT SAT JUL 21 2018

...SIGNIFICANT WEATHER ADVISORY FOR GILMER COUNTY UNTIL 900 PM EDT...

At 834 PM EDT...a strong thunderstorm was near Mountaintown, or near
Ellijay...moving southeast at 25 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
Ellijay, East Ellijay, Talona, Cartecay, Pisgah, Cherry Log,
Mountaintown and Roy.

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 3485 8443 3470 8425 3467 8425 3467 8424
      3464 8420 3462 8420 3458 8432 3458 8433
      3457 8433 3455 8441 3456 8443 3455 8447
      3456 8447 3456 8449 3455 8448 3455 8449
      3457 8450 3455 8453 3479 8459
TIME...MOT...LOC 0034Z 319DEG 22KT 3476 8449

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

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 8:03 PM EDT	Special Weather Statement	FFC	Morgan	27 min
Jul 21, 8:04 PM EDT	Severe Thunderstorm Warning	FFC	Barrow, Gwinnett	26 min
Jul 21, 8:22 PM EDT	Severe Thunderstorm Warning	FFC	Barrow, Clarke, Jackson, Oconee, Walton	23 min
Jul 21, 8:25 PM EDT	Special Weather Statement	FFC	White	35 min
Jul 21, 8:31 PM EDT	Special Weather Statement	FFC	Bartow, Paulding	44 min
Jul 21, 8:35 PM EDT	Severe Thunderstorm Warning	FFC	Bartow, Cherokee, Cobb, Paulding	22 min
Jul 21, 8:42 PM EDT	Severe Thunderstorm Warning	FFC	Barrow, Clarke, Jackson, Madison, Oconee, Oglethorpe	33 min
Jul 21, 8:49 PM EDT	Special Weather Statement	FFC	Stewart	11 min
Jul 21, 8:51 PM EDT	Special Weather Statement	FFC	Cherokee, Forsyth	24 min
Jul 21, 8:54 PM EDT	Special Weather Statement	FFC	Morgan, Walton	36 min
Jul 21, 9:01 PM EDT	Severe Thunderstorm Warning	FFC	Cherokee, Forsyth, Fulton, Gwinnett, Hall	44 min
Jul 21, 9:11 PM EDT	Severe Thunderstorm Warning	FFC	Oglethorpe	34 min
Jul 21, 10:25 PM EDT	Special Weather Statement	FFC	Banks	35 min
Jul 21, 11:13 PM EDT	Special Weather Statement	FFC	Wilkes	32 min
Jul 21, 11:16 PM EDT	Severe Thunderstorm Warning	FFC	Oglethorpe, Wilkes	29 min
Jul 21, 11:33 PM EDT	Special Weather Statement	FFC	Upson	27 min
Jul 21, 11:44 PM EDT	Special Weather Statement	FFC	Wilkes	16 min
Jul 22, 12:43 AM EDT	Special Weather Statement	FFC	McDuffie	17 min
Jul 22, 12:47 AM EDT	Special Weather Statement	FFC	Upson	28 min
Jul 22, 1:11 AM EDT	Special Weather Statement	FFC	Crawford	34 min
Jul 22, 1:21 AM EDT	Severe Thunderstorm Warning	FFC	Bibb, Crawford, Houston, Peach, Twiggs	24 min
Jul 22, 1:46 AM EDT	Special Weather Statement	FFC	Bibb, Twiggs	29 min
Jul 22, 2:01 AM EDT	Special Weather Statement	FFC	Peach	29 min
Jul 22, 4:16 AM EDT	River Flood Warning	FFC	Murray, Whitfield	21 hr
Jul 22, 1:49 PM EDT	Special Weather Statement	FFC	Talbot	26 min
Jul 22, 4:19 PM EDT	Special Weather Statement	FFC	Marion, Schley	26 min
Jul 22, 4:24 PM EDT	Special Weather Statement	FFC	Treutlen	36 min
Jul 22, 4:34 PM EDT	Severe Thunderstorm Warning	FFC	Bleckley, Dodge, Laurens, Twiggs, Wilkinson	41 min
Jul 22, 4:56 PM EDT	Special Weather Statement	FFC	Pickens	34 min
Jul 22, 5:01 PM EDT	Severe Thunderstorm Warning	FFC	Dodge, Laurens, Telfair, Wheeler	44 min
Jul 22, 5:10 PM EDT	Special Weather Statement	FFC	Wilcox	35 min
Jul 22, 5:16 PM EDT	Special Weather Statement	FFC	Bleckley	29 min
Jul 22, 5:19 PM EDT	Severe Thunderstorm Warning	FFC	Dodge, Pulaski, Wilcox	41 min
Jul 22, 5:29 PM EDT	Special Weather Statement	FFC	Treutlen	46 min
Jul 22, 5:35 PM EDT	Special Weather Statement	FFC	Candler	10 min
Jul 22, 5:38 PM EDT	Special Weather Statement	FFC	Marion, Schley	37 min
Jul 22, 5:39 PM EDT	Severe Thunderstorm Warning	FFC	Emanuel	21 min
Jul 22, 5:45 PM EDT	Severe Thunderstorm Warning	FFC	Dodge, Pulaski	28 min
Jul 22, 5:47 PM EDT	Special Weather Statement	FFC	Wheeler	28 min
Jul 22, 5:49 PM EDT	Special Weather Statement	FFC	Johnson	26 min
Jul 22, 5:55 PM EDT	Special Weather Statement	FFC	Wilkinson	35 min
Jul 22, 5:57 PM EDT	Special Weather Statement	FFC	Bartow	33 min
Jul 22, 6:04 PM EDT	Special Weather Statement	FFC	Hall	26 min
Jul 22, 6:07 PM EDT	Severe Thunderstorm Warning	FFC	Bleckley, Houston, Pulaski, Twiggs	38 min
Jul 22, 6:16 PM EDT	Special Weather Statement	FFC	Marion	29 min
Jul 22, 6:19 PM EDT	Special Weather Statement	FFC	Wilkinson	26 min
Jul 22, 6:31 PM EDT	Special Weather Statement	FFC	Washington	29 min
Jul 22, 6:33 PM EDT	Special Weather Statement	FFC	Crisp, Wilcox	27 min
Jul 22, 6:35 PM EDT	Special Weather Statement	FFC	Barrow	25 min
Jul 22, 6:45 PM EDT	Special Weather Statement	FFC	Banks	30 min
Jul 22, 6:47 PM EDT	Severe Thunderstorm Warning	FFC	Jefferson, Washington	43 min
Jul 22, 6:50 PM EDT	Severe Thunderstorm Warning	FFC	Barrow, Gwinnett, Jackson	28 min
Jul 22, 7:01 PM EDT	Special Weather Statement	FFC	Wilcox	29 min
Jul 22, 7:07 PM EDT	Special Weather Statement	FFC	Marion	38 min
Jul 22, 7:15 PM EDT	Severe Thunderstorm Warning	FFC	Wilcox	17 min
Jul 22, 7:20 PM EDT	Special Weather Statement	FFC	Madison	25 min
Jul 22, 7:40 PM EDT	Special Weather Statement	FFC	Clarke, Oglethorpe	35 min
Jul 22, 7:49 PM EDT	Severe Thunderstorm Warning	FFC	Clarke, Jackson, Madison, Oconee, Oglethorpe	41 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.