A couple of thunderstorms developed across northeast Georgia during the evening and produced brief damaging winds.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS GSP wrote it up.
A couple of thunderstorms developed across northeast Georgia during the evening and produced brief damaging winds.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Greenville-Spartanburg, SC wrote its last area forecast discussion before the first event at Aug 30, 4:32 PM EST, 1 hour 21 minutes earlier.
Area Forecast Discussion
National Weather Service Greenville-Spartanburg SC
532 PM EDT Sun Aug 30 2020
.SYNOPSIS...
The atmosphere will continue moistening up through Monday followed by
the onset of ridging and warmer temperatures for Tuesday. A
summerlike Bermuda high pressure area will be featured across the
region Wednesday through Friday.
&&
.NEAR TERM /THROUGH MONDAY/...
As of 520 PM Sunday: Convection still struggling to get going across
the GA/SC mountains and the Upper Savannah Valley. But plenty of
convection seen across AL and western GA. The CAMs agree that
convective activity doesn't really get going until after 00z. No big
changes to the forecast with this update.
Otherwise, convection should linger well into the evening, and will
likely increase in coverage...esp from around mid-evening into the
early part of the overnight, as an area of height falls and
associated deep moisture plume begin impacting the area. This
appears to warrant 50-60 pops lingering in most areas until well
after midnight. While what little risk of severe storms there is
should subside during the evening, a risk of locally excessive
rainfall will likely unfold overnight, as warm rain processes become
increasingly likely and the potential for cell training increases.
While convective coverage is forecast to diminish late tonight into
Monday morning, any lull should be brief, as convection should
blossom across the area Monday afternoon in light of continued
rounds of height falls and persistence of deep moisture plume
characterized by precipitable water values of around 2 inches. Morning
cloud cover, showers, and deep warm cloud layers will limit the
amount of instability Mon afternoon, and the severe storm threat,
while non-zero will continue to take a back seat to hydro concerns.
While the accelerating mid-level flow should allow for somewhat
swift cell movement, conditions will be favorable for training of
efficient rainfall-producing cells, especially in and around terrain
features, and along weak E/W-oriented surface boundary. Speaking of
which, max temps Monday will be very tricky, as some operational
guidance is suggesting development of a weak in-situ cold air
damming signature, although if/when/where this sets up is very much
in doubt. Even so, max temps should be at least a couple of degrees
below climo in most areas.
&&
.SHORT TERM /MONDAY NIGHT THROUGH WEDNESDAY/...
As of 100 PM Sunday: Upper heights atop the SE CONUS will be rising
on Tuesday as subtropical ridge axis builds westward. We will be
back to a weak flow regime and typical summertime conditions
featuring max temperatures rebounding to near the early September
climo if not a few deg F above, along with scattered coverage of
diurnally fired tstms. Expect little change in the strength and
positioning of the upper ridge axis through Wednesday. A bubble of
even warmer air within the weak WSW llvl flow is progged to
overspread the cwfa, boosting piedmont MaxT into the lower 90s and
perhaps apparent temperatures near 100. It still looks like the
atmosphere away from the mountains will remain suppressed through
peak heating.
&&
.LONG TERM /WEDNESDAY NIGHT THROUGH SUNDAY/...
As of 130 PM Sunday...Moderately strong subtroptical ridge axis
remains in place just south of the cwfa to start off the period and
moves little through Friday. Within this summertime pattern,
Piedmont apparent temperatures may be near 100 again on Thursday and
Friday. Diurnal thunderstorm activity may be suppressed once again
away from the mountains on Thursday with chances creeping higher
regionwide Friday afternoon. We are still expecting a pattern
change over the weekend featuring a break down of the persistent
upper ridging allowing a cool front to slip south of the cwfa. Much
of the extended model consensus is progging maximum temperatures in
the middle 80s in the Piedmont for both Saturday and Sunday.
&&
.AVIATION /22Z SUNDAY THROUGH FRIDAY/...
At KCLT and elsewhere: Convection has been a little slow to get
going across the high terrain this afternoon, but a few cells have
managed to fire along the Blue Ridge south of KAVL. There are still
some doubts as to how great coverage will be this afternoon through
early evening across western areas, but a VCTS appears warranted at
all sites except KHKY and KCLT at by at least early this evening. At
these latter two sites, conditions remain relatively stable this
afternoon, and convective chances are minimal for at least the next
6 hours or so. However, an uptick in convective chances is expected
to all sites later this evening...continuing through much of the
overnight, as an upper air disturbance and associated moisture plume
begin moving over the terminal forecast area. Timing and coverage of
convection remains a bit uncertain, but at least solid scattered
coverage is expected, and some flavor or VCTS/VCSH and Prob30s for
TSRA is warranted. Cigs and perhaps visby are also expected to
deteriorate toward daybreak, with MVFR or IFR conditions expected at
mos terminals by sunrise, with only slight improvement expected by
the end of the period. Winds will generally favor a light easterly
component through the period.
Outlook: Numerous to perhaps widespread convective coverage is
expected Monday afternoon/evening as an upper level disturbance
crosses the area. More typical coverage of diurnal showers/storms
is expected Tue into late week. Early morning low cloud/fog
restrictions will also be possible over the mountain valleys
most days.
Confidence Table...
21-03z 03-09Z 09-15Z 15-18Z
KCLT High 100% High 100% Med 79% High 88%
KGSP High 100% High 100% Med 65% High 85%
KAVL High 100% High 86% Low 52% High 86%
KHKY High 100% High 100% Med 69% Med 68%
KGMU High 100% High 100% Med 65% High 88%
KAND High 100% High 100% High 82% High 82%
The percentage reflects the number of guidance members agreeing
with the scheduled TAF issuance flight rule category. Complete hourly
experimental aviation forecast consistency tables are available at
the following link:
www.weather.gov/gsp/aviation
&&
.GSP WATCHES/WARNINGS/ADVISORIES...
GA...None.
NC...None.
SC...None.
&&
SYNOPSIS...CSH
NEAR TERM...ARK/JDL
SHORT TERM...CSH
LONG TERM...CSH
AVIATION...JDLHazardous Weather Outlook National Weather Service Greenville-Spartanburg SC 400 PM EDT Sun Aug 30 2020 GAZ010-017-018-026-028-029-NCZ033-048>053-058-059-062>065-068- 501>510-SCZ001>008-010>013-019-312000- Rabun-Habersham-Stephens-Franklin-Hart-Elbert-Avery-Madison-Yancey- Mitchell-Swain-Haywood-Buncombe-Graham-Northern Jackson-Macon- Southern Jackson-Transylvania-Henderson-Cleveland-Caldwell Mountains- Greater Caldwell-Burke Mountains-Greater Burke-McDowell Mountains- Eastern McDowell-Rutherford Mountains-Greater Rutherford- Polk Mountains-Eastern Polk-Oconee Mountains-Pickens Mountains- Greenville Mountains-Greater Oconee-Greater Pickens- Greater Greenville-Spartanburg-Cherokee-Anderson-Abbeville-Laurens- Union SC-Greenwood- 400 PM EDT Sun Aug 30 2020 This Hazardous Weather Outlook is for northeast Georgia, piedmont North Carolina, western North Carolina and upstate South Carolina. .DAY ONE...This afternoon and tonight. Scattered showers and thunderstorms are expected to develop this evening from southwest North Carolina to northeast Georgia and the Upstate and lower Piedmont of South Carolina. The main threat will be cloud to ground lightning and heavy downpours, but one or two could become strong enough to produce damaging wind gusts. The storms may continue to develop through the overnight period. While the threat of severe storms will diminish by the late evening, the potential for localized flash flooding will increase. .DAYS TWO THROUGH SEVEN...Monday through Saturday. Hazardous weather is not expected at this time. .SPOTTER INFORMATION STATEMENT... None. NCZ035>037-056-057-069>072-082-SCZ009-014-312000- Alexander-Iredell-Davie-Catawba-Rowan-Lincoln-Gaston-Mecklenburg- Cabarrus-Union NC-York-Chester- 400 PM EDT Sun Aug 30 2020 This Hazardous Weather Outlook is for piedmont North Carolina and upstate South Carolina. .DAY ONE...This afternoon and tonight. Scattered showers and thunderstorms may develop this evening through the pre-dawn hours Monday. Cloud to ground lightning and heavy downpours will be the primary threats. Localized flash flooding cannot be ruled out. .DAYS TWO THROUGH SEVEN...Monday through Saturday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... None.
Special Weather Statement National Weather Service Greenville-Spartanburg SC 622 PM EDT Sun Aug 30 2020 GAZ010-017-302245- Rabun GA-Habersham GA- 622 PM EDT Sun Aug 30 2020 ...A STRONG THUNDERSTORM WILL IMPACT NORTHERN HABERSHAM AND SOUTHWESTERN RABUN COUNTIES UNTIL 645 PM EDT... At 621 PM EDT, Doppler radar was tracking a strong thunderstorm 4 miles north of Clarkesville. This storm was nearly stationary. Locations to be impacted include... Tallulah Falls, Lake Rabun, Lake Burton, Lakemont, Tallulah Gorge State Park, Seed Lake, Turnerville and Hollywood. Wind gusts up to 40 mph and pea size hail will be possible in these areas. PRECAUTIONARY/PREPAREDNESS ACTIONS... Torrential rainfall may flood areas with poor drainage, such as ditches and underpasses. Avoid these areas and do not cross flooded roads. Water levels of small streams may also rise rapidly. Seek higher ground if threatened by flood waters. && LAT...LON 3462 8350 3466 8361 3485 8356 3477 8333 TIME...MOT...LOC 2221Z 217DEG 2KT 3467 8354 12
The Greer radar (KGSP), 120 km away, was scanning. The volume nearest the first event began at 22:53 UTC.
2 thunderstorm wind. Local standard time, as filed.
Public reported county comms reported trees blown down at Watts Mill Rd and Sillycook Trail. County comms reported a large tree down a miles southeast of this location.
County comms reported a tree blown down on Nub Garland Rd and another tree down on Oak Valley Rd.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Georgia in 2020Every state in 2020This day in weather historyWarnings in Georgia, August 2020
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 919489, 919490.