Scattered thunderstorms and storm clusters developed over Upstate South Carolina during the evening. A couple of the storms produced brief damaging wind gusts.
Every event with a place to put it. Tap one for its entry below.
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.
Scattered thunderstorms and storm clusters developed over Upstate South Carolina during the evening. A couple of the storms produced brief damaging wind gusts.
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 Jul 12, 8:05 PM EST, 42 minutes earlier.
Area Forecast Discussion
National Weather Service Greenville-Spartanburg SC
905 PM EDT Mon Jul 12 2021
.SYNOPSIS...
A Bermuda high will maintain seasonably hot and humid conditions,
with afternoon to evening showers and thunderstorms, through the
remainder of the week.
&&
.NEAR TERM /THROUGH TUESDAY/...
As of 905 PM EDT Monday: Better convective coverage on outflows and
Atlantic moisture arriving from the south will require a boost to
likely PoPs or better for the southern half of the forecast area for
the rest of the evening hours. Anticipate instability slowly
weakening by midnight, and this should permit the bulk of the
coverage east of the mountains to diminish to showers, with the best
remaining coverage overnight in the southern mountains in southerly
upslope. Gusty winds and locally heavy rainfall remain the primary
threats. The moisture will bring stratus to the region overnight,
which could preclude any large areas of fog - except in the mountain
valleys. Mins will be near climo overnight.
On Tuesday, the Southeast will remain situated between the
persistent subtropical upper ridge to our east and a slowly phasing
upper trough to our west. The trough will gradually phase northward
from the mid MS River Valley across the lower OH River Valley by
late day. At the sfc, warm and moist SLY flow will persist over the
region, with PWs in excess of 1.75 inches. Mid/upper level forcing
will remain weak, however the low-level SLY to SWLY flow should
provide some support for convective development again during the
afternoon hours, especially across the the higher terrain. Severe
potential once again appears minimal, with slightly better potential
over the higher terrain. Overall, heavy rainfall/flash flooding
appears to be the bigger threat. Temps will remain at or slightly
above normal for mid-July.
&&
.SHORT TERM /TUESDAY NIGHT THROUGH THURSDAY/...
As of 205 pm Monday: The westerlies will be rather active across the
northern half of the country during the short term, with periodic
height falls allowing the weakening/suppression of the subtropical
anticyclone off the Mid-Atlantic coast. The latter feature will
evolve into an elongated ridge that cover much of the Southeast
through the period and into at least the early part of the medium
range, while the center of the weakening anticyclone may move into
the Carolina coast by the end of the period. That being the case,
probabilities for diurnal convection are expected to revert to
around normal (primarily 40-50% mountains to 30% Piedmont) by
Thursday afternoon/evening. Weak flow aloft will yield the usual
mid-summer convective threats: possibly a pulse severe storm or two
along with perhaps a highly localized excessive rainfall threat due
to slow-moving and/or anchoring cells. Temps are forecast to average
right around normal through the period.
&&
.LONG TERM /THURSDAY NIGHT THROUGH MONDAY/...
As of 215 pm Monday: Global models are converging toward a consensus
solution in allowing the subtropical ridge to become suppressed
south of the Conus by early next week, in response to periodic
height expected to impact the northern half of the country
throughout this week. In fact, there is a strong consensus in
anomalously low upper heights covering much of the eastern third of
the country by Day 7. It therefore appears increasingly likely that
a frontal zone will sag toward into the forecast area during the
Sunday/Monday time frame and enhance convective chances. Above climo
PoPs (with a strong, but not exclusively diurnal bent)...generally
50-70%...are advertised both days. While temps will be around normal
through much of the period, slightly below climo conditions are
advertised for next Monday in anticipation of lower heights along
with the likelihood of enhanced cloud cover and convective coverage.
&&
.AVIATION /01Z TUESDAY THROUGH SATURDAY/...
At KCLT and Elsewhere: Attention has turned to the line of showers
and thunderstorms arriving from the south on Atlantic moisture and
residual outflows. This activity should weaken as it moves
northward, but a TEMPO TSRA could well be needed at KCLT and across
the Upstate TAF sites. As coverage dwindles later this evening and
overnight, the next concern will be the potential for IFR to MVFR
stratus to spread into the area. Some sources, such as the RAP,
produce fairly widespread IFR cigs throughout the area before
daybreak, while other solutions have SCT MVFR bases. Will compromise
with mainly upper IFR range cigs in western TAF sites and MVFR from
KGSP to KCLT. Any IFR fog issues will be confined to the mountain
river valleys, with stratus preferred on light southerly mixing
elsewhere. Anticipate slow recovery through the MVFR range Tuesday
morning, with lower end VFR cigs with heating through the day. Will
feature PROB30 TSRA for the afternoon hours throughout. Expect S/SW
flow at 10 kt or less with mixing, but with low end afternoon gusts
in the upper teens possible at times.
Outlook: An unsettled pattern, with morning fog/stratus restrictions
followed by afternoon/evening storms, will persist through the
rest of the work week and likely into the weekend.
Confidence Table...
01-07Z 07-13Z 13-19Z 19-00Z
KCLT High 100% High 95% High 100% High 100%
KGSP High 98% High 85% High 92% High 100%
KAVL High 100% Low 43% Low 47% High 100%
KHKY High 98% High 87% High 91% High 100%
KGMU High 99% Med 73% High 81% High 100%
KAND High 100% High 80% High 82% High 100%
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...JDL
NEAR TERM...HG
SHORT TERM...JDL
LONG TERM...JDL
AVIATION...HGHazardous Weather Outlook National Weather Service Greenville-Spartanburg SC 858 PM EDT Mon Jul 12 2021 NCZ033-035>037-048>053-056>058-501>506-140100- Avery-Alexander-Iredell-Davie-Madison-Yancey-Mitchell-Swain-Haywood- Buncombe-Catawba-Rowan-Graham-Caldwell Mountains-Greater Caldwell- Burke Mountains-Greater Burke-McDowell Mountains-Eastern McDowell- 858 PM EDT Mon Jul 12 2021 This Hazardous Weather Outlook is for piedmont North Carolina and western North Carolina. .DAY ONE...Tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... None. GAZ010-017-018-026-028-029-NCZ059-062>065-068>072-082-507>510- SCZ001>014-019-140100- Rabun-Habersham-Stephens-Franklin-Hart-Elbert-Northern Jackson-Macon- Southern Jackson-Transylvania-Henderson-Cleveland-Lincoln-Gaston- Mecklenburg-Cabarrus-Union NC-Rutherford Mountains- Greater Rutherford-Polk Mountains-Eastern Polk-Oconee Mountains- Pickens Mountains-Greenville Mountains-Greater Oconee- Greater Pickens-Greater Greenville-Spartanburg-Cherokee-York- Anderson-Abbeville-Laurens-Union SC-Chester-Greenwood- 858 PM EDT Mon Jul 12 2021 This Hazardous Weather Outlook is for northeast Georgia, piedmont North Carolina, western North Carolina and upstate South Carolina. .DAY ONE...Tonight. Showers and thunderstorms will track in from the south tonight. Frequent cloud-to-ground lightning and heavy downpours are the main threats with these storms. Localized flooding is possible where storms persist. An isolated strong to severe storm cannot be ruled out. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... None.
Special Weather Statement
National Weather Service Greenville-Spartanburg SC
534 PM EDT Mon Jul 12 2021
NCZ071-SCZ009-122200-
Mecklenburg NC-York SC-
534 PM EDT Mon Jul 12 2021
...A STRONG THUNDERSTORM WILL IMPACT SOUTHERN MECKLENBURG AND
NORTHEASTERN YORK COUNTIES UNTIL 600 PM EDT...
At 533 PM EDT, Doppler radar was tracking a strong thunderstorm 8
miles northwest of Indian Land, or near Carowinds, moving northeast
at 20 mph.
Locations to be impacted include...
Uptown Charlotte, Central Charlotte, South Charlotte, Southwest
Charlotte, East Charlotte, Northwest Charlotte, Mint Hill, Fort Mill,
Pineville and Tega Cay.
Wind gusts up to 40 mph, pea size hail and very heavy rainfall rates
up to 2 inches per hour will be possible in these areas.
LAT...LON 3502 8086 3507 8090 3503 8090 3501 8091
3500 8089 3496 8095 3508 8111 3515 8106
3515 8102 3516 8100 3521 8101 3535 8090
3517 8065
TIME...MOT...LOC 2133Z 221DEG 17KT 3508 8098
KRENTZSpecial Weather Statement
National Weather Service Greenville-Spartanburg SC
600 PM EDT Mon Jul 12 2021
NCZ071-072-122230-
Cabarrus NC-Mecklenburg NC-
600 PM EDT Mon Jul 12 2021
...A STRONG THUNDERSTORM WILL IMPACT SOUTHWESTERN CABARRUS AND
CENTRAL MECKLENBURG COUNTIES UNTIL 630 PM EDT...
At 559 PM EDT, Doppler radar was tracking a strong thunderstorm near
Uptown Charlotte, or near Freedom Park, moving northeast at 20 mph.
Locations to be impacted include...
Uptown Charlotte, Huntersville, Central Charlotte, Northeast
Charlotte, Southwest Charlotte, East Charlotte, Northwest Charlotte,
Harrisburg, Freedom Park and University City.
Wind gusts up to 40 mph, pea size hail and very heavy rainfall rates
up to 2 inches per hour will be possible in these areas.
LAT...LON 3506 8084 3518 8100 3519 8100 3545 8079
3527 8054
TIME...MOT...LOC 2159Z 221DEG 18KT 3518 8087
KRENTZSpecial Weather Statement
National Weather Service Greenville-Spartanburg SC
633 PM EDT Mon Jul 12 2021
NCZ057-071-072-122315-
Rowan NC-Cabarrus NC-Mecklenburg NC-
633 PM EDT Mon Jul 12 2021
...A STRONG THUNDERSTORM WILL IMPACT CABARRUS...NORTHEASTERN
MECKLENBURG AND SOUTHWESTERN ROWAN COUNTIES UNTIL 715 PM EDT...
At 633 PM EDT, Doppler radar was tracking a strong thunderstorm 6
miles southwest of Downtown Concord, or over Charlotte Motor
Speedway, moving northeast at 25 mph.
Locations to be impacted include...
Kannapolis, Downtown Concord, Northeast Charlotte, West Concord,
Harrisburg, China Grove, Landis, Enochville, University City and
Charlotte Motor Speedway.
Wind gusts up to 40 mph, pea size hail and very heavy rainfall rates
up to 2 inches per hour will be possible in these areas.
LAT...LON 3523 8064 3534 8082 3551 8077 3551 8074
3557 8075 3567 8072 3551 8033
TIME...MOT...LOC 2233Z 214DEG 25KT 3536 8069
KRENTZPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
750 PM EDT MON JUL 12 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0630 PM TSTM WND DMG 2 NNE HARRISBURG 35.35N 80.65W
07/12/2021 CABARRUS NC 911 CALL CENTER
911 CALL CENTER REPORTED TREE DOWN ON A HOUSE ON GLEN
EAGLES LN.
&&Special Weather Statement
National Weather Service Greenville-Spartanburg SC
848 PM EDT Mon Jul 12 2021
GAZ026-028-029-SCZ004-010-011-130130-
Elbert GA-Hart GA-Franklin GA-Greater Oconee SC-Anderson SC-
Abbeville SC-
848 PM EDT Mon Jul 12 2021
...STRONG THUNDERSTORMS WILL IMPACT EASTERN FRANKLIN...ELBERT...
HART...SOUTHWESTERN ANDERSON...ABBEVILLE AND SOUTH CENTRAL OCONEE
COUNTIES UNTIL 930 PM EDT...
At 848 PM EDT, Doppler radar indicated strong thunderstorms along a
line extending from 9 miles southeast of Carnesville to 13 miles
northeast of Washington, and moving north at 50 mph.
Locations to be impacted include...
Abbeville, Elberton, Hartwell, Royston, Calhoun Falls, Reed Creek,
Lavonia, Gumlog, Iva and Bowman.
Wind gusts up to 40 mph, pea size hail and very heavy rainfall rates
up to 2 inches per hour will be possible in these areas.
LAT...LON 3399 8265 3397 8278 3400 8290 3417 8310
3423 8308 3427 8311 3426 8315 3452 8313
3454 8310 3461 8312 3416 8224 3411 8226
3406 8233 3406 8244 3408 8248 3407 8253
3401 8260 3396 8257
TIME...MOT...LOC 0048Z 201DEG 41KT 3427 8311 3388 8259
KRENTZSpecial Weather Statement
National Weather Service Greenville-Spartanburg SC
930 PM EDT Mon Jul 12 2021
GAZ026-028-029-SCZ004-010-011-130215-
Elbert GA-Hart GA-Franklin GA-Greater Oconee SC-Anderson SC-
Abbeville SC-
930 PM EDT Mon Jul 12 2021
...STRONG THUNDERSTORMS WILL IMPACT SOUTHEASTERN FRANKLIN...CENTRAL
ELBERT...HART...ANDERSON...CENTRAL ABBEVILLE AND SOUTHEASTERN OCONEE
COUNTIES UNTIL 1015 PM EDT...
At 930 PM EDT, Doppler radar indicated strong thunderstorms along a
line extending from 8 miles west of Hartwell to 10 miles east of
Elberton, and moving northeast at 30 mph.
Locations to be impacted include...
Anderson, Hartwell, Seneca, Homeland Park, Belton, Northlake, Honea
Path, Royston, Calhoun Falls and Reed Creek.
Wind gusts up to 40 mph, pea size hail and very heavy rainfall rates
up to 2 inches per hour will be possible in these areas.
LAT...LON 3401 8265 3431 8317 3468 8298 3466 8283
3464 8283 3463 8285 3462 8285 3465 8281
3461 8263 3439 8227 3434 8233 3432 8232
TIME...MOT...LOC 0130Z 207DEG 29KT 3434 8308 3412 8268
KRENTZThe Greer radar (KGSP), 56 km away, was scanning. The volume nearest the first event began at 01:48 UTC.
2 thunderstorm wind. Local standard time, as filed.
County comms reported several trees blown down along Belton Hwy. Media reported additional trees down nearby on Gilmer Rd.
Broadcast media reported trees blown down on Woodruff Rd.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in South Carolina in 2021Every state in 2021This day in weather historyWarnings in South Carolina, July 2021
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: 975596, 975597.