South Carolina, 2018

Flash Flood and Damaging Winds in South Carolina, June 1, 2018

June 1, 2018 · NWS GSP · 9 events in 7 counties and zones

Scattered to numerous thunderstorms and storm clusters moved into the Upstate from north Georgia during the late afternoon and evening. Multiple storm clusters produced severe weather in the form of damaging wind gusts.

Where it happened

Every event with a place to put it. Tap one for its entry below.

  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

Open the live radar over this ground

The toll

Deaths
0
Injuries
0
Property damage
$35,000
Crop damage
None recorded
Events
9

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.

What happened

The episode as NWS GSP wrote it up.

Scattered to numerous thunderstorms and storm clusters moved into the Upstate from north Georgia during the late afternoon and evening. Multiple storm clusters produced severe weather in the form of damaging wind gusts.

What forecasters said that day

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 Jun 1, 4:26 PM EST, 21 minutes earlier.

Area forecast discussion, Jun 1, 4:26 PM EST, 21 minutes before
Area Forecast Discussion
National Weather Service Greenville-Spartanburg SC
526 PM EDT Fri Jun 1 2018

.SYNOPSIS...
A moist airmass will persist through the weekend keeping a chance of
showers and thunderstorms in the forecast. A drier and seasonable
air mass will arrive behind a passing cold front early next week.

&&

.NEAR TERM /THROUGH SATURDAY/...
As of 510 pm: Convection has gotten going over the past couple of
hours across the NC Foothills and Northern Piedmont, as well as,
NE Georgia. A handful of severe thunderstorm warnings have already
been issued on the strongest storms with more warnings expected
over the next few hours. Deep layer shear will begin increasing
from the west over the next several hours, but for the most part,
we're still expecting mostly pulse cells, or perhaps some small-scale
multicell clustering. In terms of any lingering hydro threat, it's
looking like the better coverage will remain east and south of the
areas with the most dire antecedent conditions, but still cannot
completely rule out a risk of localized flash flooding.

Convection should diminish later this evening in typical fashion,
although a low level NW flow developing in the wake of a mid-level
short wave trough could allow for the occasional shower along the
Tennessee border. Min temps will continue to run a few degrees above
normal. With weak subsidence developing downstream of a TN/OH Valley
short wave ridge, along with weak downslope flow, deep convection
may initially have a tough go of it on Saturday. However, forecast
soundings indicate more than ample instability, with little
inhibition. As such, scattered convection should eventually fire
along across the ridge tops and move southeast, warranting 30-50
pops across the mountains, and 20-30 across the Piedmont. Max temps
will be similar to today's readings.

&&

.SHORT TERM /SATURDAY NIGHT THROUGH MONDAY/...
As of 2:35 PM Friday: The first part of this forecast cycle should
feature an end to lingering showers and thunderstorms Saturday
evening. This is a result of the diurnal cycle ending and the first
upper level trough shifting off to the east.

We may have a short period of upper level ridging late Saturday
night into Sunday morning. But that will be short lived as a second
trough digs rapidly (northwesterly flow aloft )into our forecast
area (FA), roughly late Sunday morning into Sunday evening. This
upper level trough will be accompanied by a secondary cold front.

The combination of frontal convergence and a decent lobe of energy
with the system, should tap residual moisture allowing for updrafts
and scattered showers and thunderstorms to develop. CAPES remain
very respectable, between 1000-2000 J/KG, and 0-6km bulk shear is up
at around 30 kts. However, there is a fair amount of inhibition, and
potential warm layer persisting. We have edged the POPS Sunday up
slightly and will watch for later changes in the convective
parameters.

The showers and thunderstorms should wane Sunday evening, with dry
conditions by Monday morning.

We should remain generally under a northwest flow aloft Monday with
dry conditions. The exception might be in our northern NC mountains
with a cool pool, and a combination of lingering moisture. As a
resul we will carry a few showers Monday afternoon.

Final note on the shower and thunderstorm potential in this period:
it appears showers and thunderstorms will be moving along, based on
sounding information. However we will monitor any slowing of the
showers and storms which might cause a local flash flood threat.

In the temperature department, the thermal profiles are showing a
nice warm-up Sunday, before the frontal passage. Following into
Monday we should shave at least a few degrees (at least) in
comparison to Sunday.

&&

.LONG TERM /MONDAY NIGHT THROUGH FRIDAY/...
As of 200 PM Friday: Much drier air continues to filter across the
region Monday night and Tuesday on both the GFS and ECMWF. The GFS
has surface high pressure centered over the SE States late Tuesday.
A backdoor cool front drops down mid week but timing is different
from GFS and EC. The EC keeps us dry through the late week although
low pressure over north Florida to offshore SC brings some moisture
near piedmont at the end of the week. The GFS now has increasing
moisture late in the week with the backdoor front stalling over our
area Thursday with a shortwave dropping down from NW on Friday with
good coverage of convection to start the weekend. Since this is the
first run with this increased moisture, will hold off and only
increase POPs just a tad. Temps near normal.

&&

.AVIATION /22Z FRIDAY THROUGH WEDNESDAY/...
At KCLT and elsewhere: The convective cycle has been slow to get
going across the area this afternoon, and based upon the appearance
of the cumulus field, we're probably still a couple of hours or so
away from seeing any appreciable coverage of showers and storms. I
still think we'll see scattered coverage develop across the
foothills/far western Piedmont by mid-afternoon, which will then
move east to impact locations near KCLT by late afternoon/early
evening. This is the only site that receives a tempo for TSRA. With
less certainty elsewhere, the convective mention is limited to VCTS
from 20Z/21Z into the evening hours. Convection will diminish by
late evening. Occurrence of fog and/or low stratus late tonight/
early Saturday will hinge largely on which, if any sites receive
significant rainfall later today. Since that's not at all clear, no
overnight restrictions are carried attm. SW winds at around 10 kts
are expected through the evening at most sites, becoming light
overnight before shifting to the W/NW tomorrow morning.

Outlook: Scattered afternoon/evening showers and thunderstorms,
along with possible morning fog at a few locations and/or low cigs
are possible each day through Sunday night. Drier high pressure will
build in from the NW Monday, resulting in even less chances for
convection and restrictions thru the middle of next week.

Confidence Table...

            21-03z        03-09Z        09-15Z        15-18Z
KCLT       High 100%     High 100%     High 100%     High 100%
KGSP       High 100%     High 100%     High 100%     High 100%
KAVL       High 100%     High 100%     High  88%     High 100%
KHKY       High 100%     High 100%     High 100%     High 100%
KGMU       High 100%     High 100%     High 100%     High 100%
KAND       High 100%     High 100%     High 100%     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 and ensemble forecasts
are available at the following link:

www.weather.gov/gsp/aviation

&&

.GSP WATCHES/WARNINGS/ADVISORIES...
GA...None.
NC...None.
SC...None.

&&

SYNOPSIS...DEO
NEAR TERM...JPT
SHORT TERM...TS
LONG TERM...DEO
AVIATION...JDL/JPT
Hazardous weather outlook, Jun 1, 4:14 AM EST, 12 hours 33 minutes before
Hazardous Weather Outlook...CORRECTED
National Weather Service Greenville-Spartanburg SC
514 AM EDT Fri Jun 1 2018

GAZ010-017-018-026-028-029-NCZ033-035>037-048>053-056>059-062>065-
068>072-082-501>510-SCZ001>014-019-020900-
Rabun-Habersham-Stephens-Franklin-Hart-Elbert-Avery-Alexander-
Iredell-Davie-Madison-Yancey-Mitchell-Swain-Haywood-Buncombe-Catawba-
Rowan-Graham-Northern Jackson-Macon-Southern Jackson-Transylvania-
Henderson-Cleveland-Lincoln-Gaston-Mecklenburg-Cabarrus-Union-
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-York-
Anderson-Abbeville-Laurens-Chester-Greenwood-
514 AM EDT Fri Jun 1 2018

This Hazardous Weather Outlook is for northeast Georgia, piedmont
North Carolina, western North Carolina and upstate South Carolina.

.DAY ONE...Today and Tonight.

Scattered to numerous thunderstorms are expected across the area this
afternoon and evening. In addition to the continued threat of
localized flash flooding, a few of the storms will be capable of
producing severe weather in the form of damaging downburst winds
and large hail. Frequent cloud to ground lightning will be
possible with any storm.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

..Saturday...No hazardous weather is expected at this time.
..Sunday...No hazardous weather is expected at this time.
..Monday...No hazardous weather is expected at this time.
..Tuesday...No hazardous weather is expected at this time.
..Wednesday...No hazardous weather is expected at this time.
..Thursday...No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

None.

In the hours before

Special weather statement, Jun 1, 3:42 PM EST, 1 hour 5 minutes before
Special Weather Statement
National Weather Service Greenville-Spartanburg SC
442 PM EDT FRI JUN 1 2018

GAZ017-018-026-028-SCZ001-004-012130-
Hart GA-Franklin GA-Stephens GA-Habersham GA-Greater Oconee SC-
Oconee Mountains SC-
442 PM EDT FRI JUN 1 2018

...A STRONG THUNDERSTORM WILL IMPACT FRANKLIN...STEPHENS...SOUTHERN
HABERSHAM...NORTHWESTERN HART AND SOUTHWESTERN OCONEE COUNTIES UNTIL
530 PM EDT...

At 441 PM EDT, Doppler radar was tracking a strong thunderstorm 9
miles northwest of Homer, or near Lula, moving east at 45 mph.

Locations to be impacted include...
Toccoa, Hartwell, Carnesville, Cornelia, Baldwin, Westminster,
Lavonia, Gumlog, Mount Airy and Alto.

Wind gusts up to 40 mph and half inch hail will be possible in these
areas.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm may intensify, so be certain to monitor local radio and tv
stations, as well as local cable tv outlets for additional
information and possible warnings from the National Weather Service.

&&

LAT...LON 3474 8311 3450 8297 3448 8299 3448 8296
      3435 8288 3431 8338 3433 8339 3443 8338
      3446 8340 3448 8347 3449 8354 3443 8362
      3451 8367
TIME...MOT...LOC 2041Z 251DEG 39KT 3440 8365

WJM
Local storm report, Jun 1, 4:01 PM EST, 46 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
501 PM EDT FRI JUN 1 2018

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

0448 PM     TSTM WND DMG     6 S FOREST CITY         35.26N 81.88W
06/01/2018                   RUTHERFORD         NC   911 CALL CENTER

            A FEW TREES BLOWN DOWN ON JACK MCKINNEY ROAD NEAR HWY
            221.

&&

KRENTZ
Special weather statement, Jun 1, 4:02 PM EST, 45 minutes before
Special Weather Statement
National Weather Service Greenville-Spartanburg SC
502 PM EDT FRI JUN 1 2018

NCZ035>037-056-057-012145-
Rowan NC-Davie NC-Iredell NC-Alexander NC-Catawba NC-
502 PM EDT FRI JUN 1 2018

...A CLUSTER OF THUNDERSTORMS WILL IMPACT NORTHEASTERN CATAWBA...
WESTERN DAVIE...SOUTHEASTERN ALEXANDER...IREDELL AND NORTHWESTERN
ROWAN COUNTIES UNTIL 545 PM EDT...

At 502 PM EDT, Doppler radar indicated the leading edge of a cluster
of thunderstorms along a line extending from 12 miles southwest of
Yadkinville to 4 miles north of Statesville to 12 miles northeast of
Newton, and moving east at 30 mph.

Locations to be impacted include...
Statesville, Mocksville, Troutman, Stony Point, Catawba, Harmony,
Love Valley, Lake Norman State Park, Lookout Shoals Lake and Lake
Norman.

Wind gusts up to 45 mph, dime size hail and very heavy rainfall rates
up to 2 inches per hour will be possible in these areas.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

These storms may intensify, so be certain to monitor local radio and
tv stations, as well as local cable tv outlets for additional
information and possible warnings from the National Weather Service.

&&

LAT...LON 3582 8056 3561 8091 3575 8117 3587 8107
      3606 8099 3605 8050 3604 8049 3606 8047
TIME...MOT...LOC 2102Z 257DEG 25KT 3602 8083 3585 8089 3577 8105

MOORE
Special weather statement, Jun 1, 4:05 PM EST, 42 minutes before
Special Weather Statement
National Weather Service Greenville-Spartanburg SC
505 PM EDT FRI JUN 1 2018

GAZ029-SCZ011-019-012145-
Elbert GA-Abbeville SC-Greenwood SC-
505 PM EDT FRI JUN 1 2018

...A STRONG THUNDERSTORM WILL IMPACT SOUTHEASTERN ELBERT...SOUTHERN
ABBEVILLE AND SOUTHWESTERN GREENWOOD COUNTIES UNTIL 545 PM EDT...

At 505 PM EDT, Doppler radar was tracking a strong thunderstorm 10
miles southeast of Elberton, or near Nancy Hart State Park, moving
east at 45 mph.

Locations to be impacted include...
Abbeville, Calhoun Falls, Troy, Bobby Brown State Park, Lake Strom
Thurmond, Nancy Hart State Park, Lake Russell, Middleton, Promised
Land and Bradley.

Wind gusts up to 40 mph and pea size hail will be possible in these
areas.

LAT...LON 3398 8205 3399 8215 3397 8218 3402 8224
      3397 8231 3406 8233 3406 8244 3408 8248
      3407 8253 3401 8260 3396 8257 3399 8265
      3397 8278 3399 8283 3398 8286 3401 8292
      3431 8240 3396 8201 3395 8205
TIME...MOT...LOC 2105Z 248DEG 38KT 3402 8272

WJM
Local storm report, Jun 1, 4:09 PM EST, 38 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
509 PM EDT FRI JUN 1 2018

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

0500 PM     HAIL             5 WSW CLIFFSIDE         35.22N 81.85W
06/01/2018  E0.75 INCH       RUTHERFORD         NC   PUBLIC

            PUBLIC REPORTS PEA TO PENNY SIZE HAIL.

&&

KRENTZ
Special weather statement, Jun 1, 4:43 PM EST, 4 minutes before
Special Weather Statement
National Weather Service Greenville-Spartanburg SC
543 PM EDT FRI JUN 1 2018

SCZ006-010-012230-
Anderson SC-Greater Greenville SC-
543 PM EDT FRI JUN 1 2018

...A STRONG THUNDERSTORM WILL IMPACT SOUTH CENTRAL GREENVILLE AND
CENTRAL ANDERSON COUNTIES UNTIL 630 PM EDT...

At 543 PM EDT, Doppler radar was tracking a strong thunderstorm 5
miles northwest of Anderson, or near Northlake, moving east at 35
mph.

Locations to be impacted include...
Anderson, Homeland Park, Powdersville, Piedmont, Belton, Williamston,
Northlake, Pendleton, West Pelzer and Anderson Airport.

Wind gusts up to 40 mph and half inch hail will be possible in these
areas.

LAT...LON 3443 8277 3459 8287 3466 8280 3481 8250
      3450 8231
TIME...MOT...LOC 2143Z 247DEG 30KT 3455 8273

WJM

The radar

The Greer radar (KGSP), 85 km away, was scanning. The volume nearest the first event began at 21:47 UTC.

Open the radar archive at this moment

Event by event

8 thunderstorm wind, 1 flash flood. Local standard time, as filed.

Thunderstorm Wind, Abbeville

When
June 1, 4:47 PM EST
Where
Abbeville County, 2.94 mi WNW of Lowndesville
Measured
50 kt (58 mph) estimated gust
Reported by
CoCoRaHS
Coordinates
34.230, -82.700

Cocorahs observer reported a few trees blown down in the lowndesville area.

Thunderstorm Wind, Anderson

When
June 1, 4:52 PM EST to 5:06 PM EST
Where
Anderson County, 4.72 mi SE of Townville to 2.1 mi N of Toxaway
Measured
50 kt (58 mph) estimated gust
Property damage
$20,000
Reported by
Amateur Radio
Coordinates
34.532, -82.831

Ham Radio operator and the public reported multiple trees blown down on I-85 between mile markers 11 and 12, and multiple trees down along Quail Ridge Rd, with falling trees causing minor structural and vehicle damage. Public reported three large trees blown down on North St in Anderson, with one tree damaging a home.

Thunderstorm Wind, Greenwood

When
June 1, 5:15 PM EST to 5:35 PM EST
Where
Greenwood County, 1.15 mi WNW of Greenwood to 3.64 mi NNE of Ninety Six
Measured
55 kt (63 mph) estimated gust
Property damage
$10,000
Reported by
CoCoRaHS
Coordinates
34.189, -82.187

County comms reported numerous trees and power lines blown down across the county. One tree fell on a house on Lindsey Ave in Greenwood.

Thunderstorm Wind, Laurens

When
June 1, 5:16 PM EST to 5:48 PM EST
Where
Laurens County, 0.79 mi NE of Gray Court to 2.85 mi E of Tylersville
Measured
55 kt (63 mph) estimated gust
Reported by
911 Call Center
Coordinates
34.608, -82.110

County comms reported many trees and power lines blown down across the northern part of Laurens County.

Thunderstorm Wind, Laurens

When
June 1, 5:25 PM EST to 6:04 PM EST
Where
Laurens County, 3.47 mi SSW of Waterloo to 1.46 mi ENE of Philton Xrds
Measured
55 kt (63 mph) estimated gust
Reported by
911 Call Center
Coordinates
34.301, -82.083

County comms reported many trees and power lines blown down in association with a second storm cluster across the southern part of Laurens County.

Thunderstorm Wind, Union

When
June 1, 6:04 PM EST to 6:28 PM EST
Where
Union County, 5.5 mi SE of Sedalia to 1.26 mi S of Pride
Measured
55 kt (63 mph) estimated gust
Reported by
911 Call Center
Coordinates
34.545, -81.650

County comms reported numerous trees blown down across the southern part of Union County.

Thunderstorm Wind, Cherokee

When
June 1, 6:40 PM EST to 6:59 PM EST
Where
Cherokee County, 5.14 mi WSW of Wilkinsville to 3.49 mi NNE of Wilkinsville
Measured
55 kt (63 mph) estimated gust
Reported by
911 Call Center
Coordinates
34.955, -81.619

County comms reported numerous trees blown down.

Thunderstorm Wind, York

When
June 1, 7:00 PM EST to 7:30 PM EST
Where
York County, 0.29 mi WSW of Sharon to 0.48 mi NW of Celriver
Measured
50 kt (58 mph) estimated gust
Reported by
911 Call Center
Coordinates
34.949, -81.335

County comms reported numerous trees blown down across York County.

Flash Flood, York

When
June 1, 7:30 PM EST to 10:00 PM EST
Where
York County, 1 mi SE of Industrial to 1.5 mi WNW of Celriver
Cause
Heavy Rain
Property damage
$5,000
Reported by
River/Stream Gage
Coordinates
34.938, -80.970

Multiple sources reported flash flooding developed along small streams in the Rock Hill area after 2 to 4 inches of rain fell across much of central and southern York County in a short period of time due to training thunderstorms. A stream gauge on Wildcat Creek exceeded its established flood stage, indicating flooding of McConnells Highway. Media also reported a blocked culvert under McConnells Highway washed out part of the road. Public reported Manchester Creek overflowed its banks on the east side of Rock Hill, sending more than a foot of water over portions of David Lyle Blvd. A stream gauge on Big Dutchman Creek in Rock Hill peaked just slightly below flood stage, suggesting some yards along the creek were likely flooded.

What these are

Thunderstorm Wind
Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.
Flash Flood
Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in South Carolina in 2018Every state in 2018This day in weather historyWarnings in South Carolina, June 2018

Sources

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 2026-10-01. Each event’s entry at NCEI: 765541, 765540, 765544, 765545, 765547, 765549, 766081, 766080, 770520.