Strong daytime heating, and surface boundaries, produced scattered severe thunderstorms in the afternoon and evening.
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 CAE wrote it up.
Strong daytime heating, and surface boundaries, produced scattered severe thunderstorms in the afternoon and evening.
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 Columbia, SC wrote its last area forecast discussion before the first event at Jun 11, 12:32 PM EST, 3 hours 28 minutes earlier.
Area Forecast Discussion National Weather Service Columbia SC 132 PM EDT Mon Jun 11 2018 .SYNOPSIS... An upper trough will remain over the eastern states through Thursday. A back door front will slip slowly south into the region tonight and stall over the CSRA and southern Midlands Tuesday. The front will gradually become diffuse Wednesday. Our region will remain between an upper ridge to our west, and an upper low to our east, late this week into early next week. && .NEAR TERM /THROUGH TONIGHT/... Strong heating and convergence into a lee-side trough will help support thunderstorms this afternoon. Coverage may be enhanced with an h7 shortwave trough in the area. The HRRR has not been consistent but has generally displayed the greatest coverage late this afternoon and in the evening. The chance of thunderstorms will continue through tonight because of convergence along the front pushing into the area. There is uncertainty with the coverage later tonight because much of the instability may get released by previous convection. Strong heating ahead of the approaching front should help support moderate instability this afternoon into the evening. Observation trends support lifted indices around minus 6, CAPE 2000 to 3000 J/kg, and precipitable water 1.7 to 2.0 inches. Steep low-level lapse rates may support strong downburst winds in the stronger cells. There may also be hail with considerable CAPE forecast in the hail growth region. We leaned toward the higher guidance general rainfall amounts of 0.4 south to 0.8 of an inch south because of the moisture expected to pool ahead of the approaching front. There will be areas with higher amounts and the high precipitable water indicates a possibility of localized flooding. The temperature guidance was close this afternoon. Cloudiness and mixing along the front favors the higher temperature guidance tonight. && .SHORT TERM /TUESDAY THROUGH WEDNESDAY NIGHT/... Weak upper troughiness will remain along the E CONUS. A moist atmosphere will remain in place. The back door front is expected to slip south and set up along the CSRA and S Midlands by afternoon and stall. This is expected to be the main focusing mechanism for convection. Cooler air and lingering low cloud cover is expected to reduce convective coverage north into the central. So, POPs Tuesday will be weighted higher to the south. Little overall change Wednesday. Nearly stationary surface boundary may gradually become diffuse. A moist atmosphere to remain over the region. Scattered diurnal thunderstorms expected. && .LONG TERM /THURSDAY THROUGH MONDAY/... Little change expected Thursday. Upper trough energy and a moist atmosphere expected to promote at least scattered diurnal thunderstorms. From Friday into early next week, the latest GFS and EC indicate an upper ridge to develop to our west over the Mississippi and Ohio valleys, with upper trough offshore the east coast, with upper energy possibly cutting off the Mid Atlantic coast. Some uncertainties regarding timing of upper disturbances passing through from the north. Also some questions on extent of atmospheric moisture, with some indications of drier air possibly filtering into the region late in the forecast period. Went with model blend. && .AVIATION /18Z MONDAY THROUGH SATURDAY/... Strong heating and convergence into a lee-side trough should help support thunderstorms this afternoon. Coverage may be enhanced with an h7 shortwave trough in the area. The HRRR has not been consistent but has generally displayed the greatest coverage late this afternoon and in the evening. The chance of thunderstorms will continue through tonight because of convergence along the front pushing into the area. There is uncertainty with the coverage later tonight because much of the instability may get released by previous convection. Strong heating ahead of the approaching front should help support moderate instability this afternoon into the evening. There will be a possibility of very strong wind and hail with the thunderstorms. Expect low cloudiness behind the front tonight. The GFS LAMP and NAM MOS supported an IFR ceiling developing which may persist through much of Tuesday morning. EXTENDED AVIATION OUTLOOK...There may be restrictions in stratus and fog during the early morning hours and also in mainly afternoon and evening thunderstorms. && .CAE WATCHES/WARNINGS/ADVISORIES... GA...None. SC...None. &&
Hazardous Weather Outlook National Weather Service Columbia SC 939 AM EDT Mon Jun 11 2018 GAZ040-063>065-077-SCZ015-016-018-020>022-025>031-035>038-041-121345- Lincoln-McDuffie-Columbia-Richmond-Burke-Lancaster-Chesterfield- McCormick-Newberry-Fairfield-Kershaw-Edgefield-Saluda-Lexington- Richland-Lee-Aiken-Sumter-Barnwell-Orangeburg-Calhoun-Clarendon- Bamberg- 939 AM EDT Mon Jun 11 2018 This Hazardous Weather Outlook is for the Midlands of South Carolina and the Central Savannah River area of Georgia. .DAY ONE...Today and Tonight. Numerous thunderstorms are forecast especially during the 600 pm to 900 pm time frame. Damaging wind and hail will be possible with the thunderstorms. There may also be very heavy rainfall with possible localized flooding. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Thunderstorms will be possible, especially during the afternoons and evenings. A few storms could contain strong wind and locally heavy rain. .SPOTTER INFORMATION STATEMENT... Spotter activation may be required this afternoon or evening.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA SC
356 PM EDT MON JUN 11 2018
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0307 PM TSTM WND DMG MAYESVILLE 33.98N 80.21W
06/11/2018 SUMTER SC 911 CALL CENTER
SUMTER COUNTY DISPATCH REPORTED TREES DOWN
ON POWERLINES NEAR MAYESVILLE.
&&
WRSSpecial Weather Statement
National Weather Service Columbia SC
401 PM EDT MON JUN 11 2018
SCZ025-112030-
Edgefield SC-
401 PM EDT MON JUN 11 2018
...Strong Thunderstorms Will Impact Portions of south central
Edgefield County Until 430 PM EDT....
At 359 PM EDT...National Weather Service doppler radar indicated a
strong thunderstorm 11 miles north of Belvedere, moving south at 10
mph.
HAZARD...strong winds 45 to 55 mph and up to penny sized hail.
IMPACT...expect minor damage to tree limbs and blowing around of
light, unsecured objects. Minor hail damage to plants,
trees and crops is possible. Damage to windshields is
unlikely.
Some locations in the path of this storm include...
southern Edgefield County southwest of Edgefield.
LAT...LON 3373 8203 3377 8189 3362 8191 3361 8206
TIME...MOT...LOC 1959Z 340DEG 8KT 3370 8192Special Weather Statement
National Weather Service Columbia SC
412 PM EDT MON JUN 11 2018
SCZ035-112045-
Barnwell SC-
412 PM EDT MON JUN 11 2018
...Strong Thunderstorms Will Impact Portions of northern Barnwell
County Until 445 PM EDT....
At 411 PM EDT...National Weather Service doppler radar indicated a
strong thunderstorm near Williston, or 10 miles north of Barnwell,
moving southeast at 20 mph.
HAZARD...gusty winds 40 to 50 mph and pea sized hail.
IMPACT...expect minor damage to tree limbs and blowing around of
light, unsecured objects. Minor hail damage to plants,
trees and crops is possible. Damage to windshields is
unlikely.
Some locations in the path of this storm include...
Williston and Elko.
LAT...LON 3339 8149 3347 8138 3339 8124 3328 8142
TIME...MOT...LOC 2011Z 335DEG 18KT 3339 8138Special Weather Statement
National Weather Service Columbia SC
428 PM EDT MON JUN 11 2018
SCZ030-035-112100-
Barnwell SC-Aiken SC-
428 PM EDT MON JUN 11 2018
...Strong Thunderstorms Will Impact Portions of northern Barnwell
and southern Aiken Counties Until 500 PM EDT....
At 426 PM EDT...National Weather Service doppler radar indicated
thunderstorm along highway 278 between Williston and Augusta.
Movement was southeast near 15 mph.
HAZARD...strong winds 45 to 55 mph and up to penny sized hail.
IMPACT...expect minor damage to tree limbs and blowing around of
light, unsecured objects. Minor hail damage to plants,
trees and crops is possible. Damage to windshields is
unlikely.
Some locations in the path of this storm include...
Williston, Blackville, New Ellenton, Jackson, Elko and Windsor.
LAT...LON 3329 8183 3342 8188 3349 8144 3344 8124
3332 8124
TIME...MOT...LOC 2026Z 326DEG 15KT 3338 8135Special Weather Statement
National Weather Service Columbia SC
429 PM EDT MON JUN 11 2018
SCZ016-112130-
Chesterfield SC-
429 PM EDT MON JUN 11 2018
...Strong Thunderstorms Will Impact Portions of southeastern
Chesterfield County Until 530 PM EDT....
At 428 PM EDT...National Weather Service doppler radar indicated a
strong thunderstorm 8 miles north of North Hartsville, or 10 miles
north of Hartsville, moving east at 15 mph.
HAZARD...gusty winds 40 to 50 mph, pea sized hail and excessive
cloud to ground lightning.
IMPACT...expect minor damage to tree limbs and blowing around of
light, unsecured objects. Minor hail damage to plants,
trees and crops is possible. Damage to windshields is
unlikely. All outdoor activities should cease. Move
indoors immediately.
Some locations in the path of this storm include...
Mcbee, Society Hill and Patrick.
Move indoors immediately. Excessive cloud to ground lightning is
occurring with this storm. If you can hear thunder, you are close
enough to be struck by lightning.
LAT...LON 3460 7978 3460 7981 3453 7983 3453 7984
3449 7988 3449 7997 3450 7999 3449 8003
3449 8005 3437 8029 3438 8029 3458 8022
3467 7984 3465 7979 3464 7980 3462 7978
TIME...MOT...LOC 2028Z 258DEG 11KT 3452 8010
HCSpecial Weather Statement
National Weather Service Columbia SC
448 PM EDT MON JUN 11 2018
SCZ022-029-112115-
Kershaw SC-Lee SC-
448 PM EDT MON JUN 11 2018
...Strong Thunderstorms Will Impact Portions of east central Kershaw
and north central Lee Counties Until 515 PM EDT....
At 447 PM EDT...National Weather Service doppler radar indicated a
strong thunderstorm 10 miles west of Clyde, or 16 miles northwest of
Bishopville, moving southeast at 20 mph.
HAZARD...strong winds 45 to 55 mph, pea sized hail and excessive
cloud to ground lightning.
IMPACT...expect minor damage to tree limbs and blowing around of
light, unsecured objects. Minor hail damage to plants,
trees and crops is possible. Damage to windshields is
unlikely. All outdoor activities should cease. Move
indoors immediately.
Some locations in the path of this storm include...
Bishopville and Bethune.
Move indoors immediately. Excessive cloud to ground lightning is
occurring with this storm. If you can hear thunder, you are close
enough to be struck by lightning.
This includes Interstate 20 in South Carolina between mile markers
114 and 118.
LAT...LON 3414 8029 3443 8045 3450 8036 3449 8033
3443 8033 3439 8029 3436 8029 3432 8024
3434 8021 3436 8020 3437 8018 3432 8017
3428 8013 3426 8013
TIME...MOT...LOC 2047Z 310DEG 16KT 3444 8037
WRSThe Robins AFB radar (KJGX), 127 km away, was scanning. The volume nearest the first event began at 20:59 UTC.
5 hail, 5 thunderstorm wind. Local standard time, as filed.
Report of golf ball size hail, and strong winds, near the intersection of Cobbham Rd and Stagecoach Rd NE.
Trees down on Louisville Rd at Lanatte Lane. Time estimated.
Trees and power lines down at the intersection of Boykin Rd and Peach Orchard Rd (US Hwy 25).
Public shared video, via social media, of hail up to half dollar size in Harlem, GA.
Quarter sized hail reported near the intersection of US Hwy 25 and Tobacco Rd.
Public reported tree limbs down and a trampoline was blown an estimated 300 feet.
Public report, via social media, of quarter sized hail at the intersection of Windsor Springs Rd and Diamond Lakes Way.
Public report, via social media, of half dollar size hail near the intersection of Windsor Spring Rd and Tobacco Rd.
Trees down on Liberty St in downtown Waynesboro.
Trees down on George Perkins Rd off of US Hwy 25.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Georgia in 2018Every state in 2018This day in weather historyWarnings in Georgia, June 2018
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: 760236, 760248, 760251, 760239, 760241, 760252, 760243, 760246, 760253, 760254.