Scattered clusters of thunderstorms developed during the afternoon across the mountains and foothills of North Carolina and moved southeast. Some of the storms produced damaging wind gusts across the southern foothills.
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 clusters of thunderstorms developed during the afternoon across the mountains and foothills of North Carolina and moved southeast. Some of the storms produced damaging wind gusts across the southern foothills.
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 27, 1:43 PM EST, 27 minutes earlier.
Area Forecast Discussion
National Weather Service Greenville-Spartanburg SC
243 PM EDT Wed Jun 27 2018
.SYNOPSIS...
Strong to severe thunderstorms will persist into this evening but
activity will dissipate overnight. A weak cold front approaches the
area Thursday and additional showers and thunderstorms are expected.
Behind the front, precip chances decrease through Saturday but heat
and humidity will persist. Shower and thunderstorm chances increase
Sunday through Wednesday as another front approaches the area.
&&
.NEAR TERM /THROUGH THURSDAY/...
As of 225 PM: The latest RADAR mosaic is showing sct convection
already over much of the higher terrain with some cells beginning
to move over the NC Foothills and SC Upstate. Convective coverage
will continue to spread over the next few hours per the latest
CAM guidance. Sfc-based CAPE still looks plentiful over the area,
and effective shear is expected to peak between 20-30 kt, with
predominately WLY winds throughout the profiles. This should be
enough to allow linear organization with the developing clusters,
and more than one round of convection is certainly possible. As
noted previously, the NAM DCAPE and the sfc-midlevel Theta-E lapse
rates are more favorable for severe storms than those from the GFS.
Otherwise, an upper trough will move over the lower Ohio Valley
tonight and early tomorrow as a sfc cold front moves thru the area.
Max temps today should top out around normal for late June with
highs tomorrow reaching a few degrees above normal. Tomorrow should
be less active overall with drier profiles in place and more of a
downslope component to the low-lvl flow. In addition, the upper
trof axis should be east of the CWFA by tomorrow afternoon. Thus
upper lvl support will be considerably weaker over the area.
&&
.SHORT TERM /THURSDAY NIGHT THROUGH SATURDAY/...
As of 230 PM EDT Wednesday: We are still on track to welcome
another weak frontal boundary into the region Thursday night
into early Friday as the upper level trough axis exits the East
Coast. Surface winds will veer from westerly to northerly and
northeasterly as the front drops from north to south through our
area, clearing the region later Friday morning as high pressure
builds into the Mid-Atlantic. The long-advertised heat ridge
enters the mid-Mississippi River Valley behind the departing
trough which will allow us to maintain min and max temperatures
about 4-8 degrees above normal; however, the northerly low-level
flow will allow slightly drier air (dewpoints in the upper 60s)
to infiltrate the region and reduce humidity. Subsidence-induced
warm air continues to be advertised in the 600-800mb layer aloft
which will aid in suppressing convective activity across much
of the Piedmont. Regardless, we continue to carry a chance of
convection along our southern and western counties closer to the
frontal boundary and over the mountains where typical orographic
forcing is anticipated to overcome the weak cap.
Northeasterly near-surface flow continues into Saturday as high
pressure slowly moves off the Delmarva coastline, keeping us along
the ridge axis. Aloft, the heat ridge centers over the Mid-Atlantic
and the low to mid-level flow veers easterly, which appears to
advect some Atlantic moisture into the region, especially along
the southern and western counties, and the column moistens below
600mb in response. Some mid-level inhibition via the subsident warm
nose remains but the "moist" easterly flow combined with respectable
MUCAPE values increases diurnal PoPs slightly on Saturday especially
south and west, furthest away from the upper-level ridge center.
There will be little change in temperatures and a slight uptick in
humidity, especially across the NC Piedmont which will keep heat
indices in the upper 90s to near 100, but below advisory criteria.
&&
.LONG TERM /SATURDAY NIGHT THROUGH WEDNESDAY/...
As of 230 PM EDT Wednesday: As the upper-level ridge center slides
off the East Coast heading into Sunday, the Deep South is in a
weakness between that center and a second height maximum over the
the Southern Plains. One or two weak upper lows may develop in
this weakness which may enhance moisture flux and forcing Sunday
into Monday, but overall the general pattern will not change as
southeasterly low-level flow will persist around the base of the
high pressure center over the western Atlantic. Persistent moisture
flux into the region combined with upslope flow will incrementally
increase PoP on Sunday and Monday as mid-level subsidence warming
weakens and total moisture content in the column increases.
Overall, we are expecting flow throughout the column to be very
weak which means as PWs increase to above 1.50" Sunday and Monday
the threat for locally heavy rainfall and isolated flooding will
also increase.
The most significant change in the pattern for Tuesday and
Wednesday is the approach of another weak/summertime cold front
which is associated with a weak shortwave trough. The trough
will concurrently dampen the East Coast ridge. Guidance is in
generally good agreement on this frontal approach and the area-wide
increase in PoPs as the associated forcing influences coverage.
As the parent low departs New England heading into Wednesday the
front may wash out before it reaches our area but the proximity
of the remnant boundary will maintain high-end chance (Piedmont,
foothills) to likely PoPs (mountains) into Wednesday afternoon.
Overnight PoPs during Tuesday and Wednesday night will remain
elevated given the moisture and weak forcing in place. The heavy
rainfall threat also persists as the mid-level flow from Monday
weakens further in advance of the shortwave trough.
There will not be much change in above-normal temperatures or
muggy dewpoints during the period; however, the increase in cloud
cover Tuesday and Wednesday as a result of increased convective
coverage will shave 1-3 degrees off the highs both days returning
us to near-normal temperatures for early July.
&&
.AVIATION /19Z WEDNESDAY THROUGH MONDAY/...
At KCLT and elsewhere: Expect mostly VFR conditions to prevail thru
18z TAF period. Exceptions include TEMPOs for TSRA this afternoon
and evening with another round of reduced visby for KAVL tomorrow
morning from roughly 10 to 13z. I have visby going down to MVFR at
KAVL, but they could see brief IFR visby and cigs as well. Otherwise,
we can expect another round of scattered to numerous showers and
thunderstorms this afternoon/evening with some organization possible
especially across the Foothills and Piedmont. Convective potential
dwindles after roughly 00z, although some activity could linger into
the late night and overnight. Tomorrow should be less active overall
with drier profiles in place and less upper-lvl support over the area.
Outlook: An upper ridge building over the Eastern CONUS is expected
to reduce diurnal convection late this week into early next week.
Patchy morning fog and/or low stratus will continue to be an issue
in mountain valleys and/or locations with wet ground.
Confidence Table...
18-24Z 00-06Z 06-12Z 12-18Z
KCLT High 98% High 100% High 100% High 100%
KGSP High 100% High 100% High 100% High 100%
KAVL High 100% High 100% High 100% High 98%
KHKY High 99% High 100% High 100% High 98%
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...JMP
NEAR TERM...JPT
SHORT TERM...JMP
LONG TERM...JMP
AVIATION...JPTHazardous Weather Outlook National Weather Service Greenville-Spartanburg SC 445 AM EDT Wed Jun 27 2018 GAZ010-017-018-026-028-NCZ033-035>037-048>053-056>059-062>065- 068>072-082-501>510-SCZ001>010-013-014-280845- Rabun-Habersham-Stephens-Franklin-Hart-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-Chester- 445 AM EDT Wed Jun 27 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 to develop again this afternoon and evening. Some of these storms may become severe with damaging winds as the main threat, but large hail cannot be ruled out. Frequent cloud-to-ground lightning and brief heavy rain can be expected as well. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. ..Thursday...No hazardous weather is expected at this time. ..Friday...No hazardous weather is expected at this time. ..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. .SPOTTER INFORMATION STATEMENT... Skywarn spotters are requested to forward any reports of large hail, damaging winds, tornadoes, or flash flooding to our office. GAZ029-SCZ011-012-019-280845- Elbert-Abbeville-Laurens-Greenwood- 445 AM EDT Wed Jun 27 2018 This Hazardous Weather Outlook is for northeast Georgia and upstate South Carolina. .DAY ONE...Today and Tonight. Scattered to numerous thunderstorms are expected to develop again this afternoon and evening. Some of these storms may become severe with damaging winds as the main threat, but large hail cannot be ruled out. Frequent cloud-to-ground lightning and brief heavy rain can be expected as well. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. ..Thursday...No hazardous weather is expected at this time. ..Friday...Excessive heat possible. ..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. .SPOTTER INFORMATION STATEMENT... Skywarn spotters are requested to forward any reports of large hail, damaging winds, tornadoes, or flash flooding to our office.
Special Weather Statement
National Weather Service Greenville-Spartanburg SC
118 PM EDT WED JUN 27 2018
NCZ053-271745-
Buncombe NC-
118 PM EDT WED JUN 27 2018
...A STRONG THUNDERSTORM WILL IMPACT CENTRAL BUNCOMBE COUNTY UNTIL
145 PM EDT...
At 117 PM EDT, Doppler radar was tracking a strong thunderstorm 8
miles northwest of Downtown Asheville, or over Leicester, moving east
at 15 mph.
Locations to be impacted include...
Downtown Asheville, East Asheville, Arden, West Asheville, North
Asheville, Woodfin, Weaverville, Biltmore Forest, Bent Creek and
Leicester.
Wind gusts up to 40 mph and pea size 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 3573 8232 3546 8251 3557 8277 3559 8278
3560 8280 3562 8281 3562 8282 3574 8270
3573 8267 3574 8267 3576 8263
TIME...MOT...LOC 1717Z 279DEG 15KT 3564 8269
MOORESpecial Weather Statement
National Weather Service Greenville-Spartanburg SC
152 PM EDT WED JUN 27 2018
NCZ053-065-505-507>509-271815-
Buncombe NC-Greater Rutherford NC-McDowell Mountains NC-Henderson NC-
Polk Mountains NC-Rutherford Mountains NC-
152 PM EDT WED JUN 27 2018
...A STRONG THUNDERSTORM WILL IMPACT SOUTHWESTERN MCDOWELL...
NORTHWESTERN RUTHERFORD...NORTHEASTERN HENDERSON AND SOUTHEASTERN
BUNCOMBE COUNTIES UNTIL 215 PM EDT...
At 152 PM EDT, Doppler radar was tracking a strong thunderstorm 15
miles east of Downtown Asheville, or 4 miles north of Bat Cave,
moving east at 25 mph.
Locations to be impacted include...
Black Mountain, Fairview In Buncombe County, Chimney Rock State Park,
Bat Cave, Swannanoa, Gerton, Shingle Hollow and Edneyville.
Wind gusts up to 40 mph and pea size 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 3557 8205 3554 8208 3554 8203 3540 8212
3540 8214 3541 8216 3541 8217 3540 8218
3540 8219 3538 8221 3537 8228 3547 8251
3563 8233
TIME...MOT...LOC 1752Z 290DEG 20KT 3552 8228
MOORESpecial Weather Statement
National Weather Service Greenville-Spartanburg SC
220 PM EDT WED JUN 27 2018
NCZ504-271845-
Greater Burke NC-
220 PM EDT WED JUN 27 2018
...A STRONG THUNDERSTORM WILL IMPACT BURKE COUNTY UNTIL 245 PM EDT...
At 219 PM EDT, Doppler radar was tracking a strong thunderstorm over
Morganton, moving east at 15 mph.
Locations to be impacted include...
Morganton, Valdese, Icard, Drexel, Connelly Springs, Rutherford
College, Glen Alpine, Lake Rhodhiss, South Mountains State Park and
Rhodhiss.
Wind gusts up to 45 mph and pea size hail will be possible in these
areas.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Gusty winds can blow down trees that are dead, or that have weakened
root systems. Outdoor furniture and similar items can be tossed
around if not anchored. Seek shelter indoors.
&&
LAT...LON 3584 8163 3582 8161 3582 8160 3578 8155
3579 8145 3577 8144 3577 8141 3565 8146
3561 8151 3557 8153 3556 8157 3557 8158
3563 8184 3570 8186 3571 8186 3585 8177
TIME...MOT...LOC 1819Z 281DEG 12KT 3575 8171
RWHSpecial Weather Statement
National Weather Service Greenville-Spartanburg SC
228 PM EDT WED JUN 27 2018
NCZ059-062-063-271900-
Southern Jackson NC-Northern Jackson NC-Macon NC-
228 PM EDT WED JUN 27 2018
...A STRONG THUNDERSTORM WILL IMPACT NORTHEASTERN MACON AND WEST
CENTRAL JACKSON COUNTIES UNTIL 300 PM EDT...
At 228 PM EDT, Doppler radar was tracking a strong thunderstorm 7
miles northeast of Franklin, or 7 miles southwest of Dillsboro,
moving southeast at 20 mph.
Locations to be impacted include...
Cullowhee, Webster, Dillsboro, Lake Glenville, Ellijay, Savannah,
Tuckasegee and Cowee.
Wind gusts up to 40 mph and pea size 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 3538 8331 3535 8315 3527 8305 3512 8325
3525 8340
TIME...MOT...LOC 1828Z 303DEG 15KT 3528 8331
MOORESpecial Weather Statement
National Weather Service Greenville-Spartanburg SC
240 PM EDT WED JUN 27 2018
GAZ010-017-018-SCZ001-271915-
Rabun GA-Stephens GA-Habersham GA-Oconee Mountains SC-
240 PM EDT WED JUN 27 2018
...STRONG THUNDERSTORMS WILL IMPACT CENTRAL STEPHENS...NORTHEASTERN
HABERSHAM...SOUTHWESTERN RABUN AND WEST CENTRAL OCONEE COUNTIES
UNTIL 315 PM EDT...
At 239 PM EDT, Doppler radar was tracking a strong thunderstorm 6
miles north of Clarkesville, or 4 miles southwest of Lake Rabun,
moving east at 25 mph. Other strong storms were developing along the
Chattooga River and into western Oconee County South Carolina.
Locations to be impacted include...
Toccoa, Tallulah Falls, Lake Rabun, Lakemont, Tallulah Gorge State
Park, Oconee State Park, Hollywood, Long Creek, Seed Lake and
Turnerville.
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.
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 3468 8358 3480 8354 3487 8330 3486 8303
3452 8328
TIME...MOT...LOC 1839Z 289DEG 21KT 3470 8349
MOORESpecial Weather Statement
National Weather Service Greenville-Spartanburg SC
244 PM EDT WED JUN 27 2018
NCZ056-068-069-504-506>510-271915-
Greater Rutherford NC-Cleveland NC-Lincoln NC-Greater Burke NC-
Polk Mountains NC-Rutherford Mountains NC-Eastern McDowell NC-
Eastern Polk NC-Catawba NC-
244 PM EDT WED JUN 27 2018
...A CLUSTER OF THUNDERSTORMS WITH INTENSE LIGHTNING WILL IMPACT
CATAWBA...SOUTHEASTERN MCDOWELL...RUTHERFORD...POLK...NORTHWESTERN
LINCOLN...NORTHWESTERN CLEVELAND AND SOUTHERN BURKE COUNTIES UNTIL
315 PM EDT...
At 244 PM EDT, Doppler radar indicated the leading edge of a cluster
of thunderstorms with intense lightning along a line extending from
near Hickory to 14 miles southeast of Morganton to 13 miles southeast
of Marion to 4 miles northwest of Columbus, and moving east at 25
mph.
Locations to be impacted include...
Hickory, Morganton, Newton, Forest City, Rutherfordton, Columbus,
Lincolnton, St. Stephens, Conover and Longview.
In addition to intense lightning, wind gusts up to 45 mph, pea size
hail and very heavy rainfall rates up to 2 inches per hour will be
possible in these areas.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Gusty winds can blow down trees that are dead, or that have weakened
root systems. Outdoor furniture and similar items can be tossed
around if not anchored. Seek shelter indoors.
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.
Frequent lightning is occurring with these storms. If outdoors, try
to get indoors or into a hard topped vehicle. Otherwise, stay away
from open areas and isolated high objects such as trees. When
indoors, stay away from windows and doors and avoid using wired
electronic devices. Do not take a shower or bath. Try to unplug
unnecessary appliances before the storms approach.
&&
LAT...LON 3582 8114 3571 8107 3571 8100 3567 8097
3550 8114 3546 8145 3518 8193 3519 8219
3525 8235 3529 8235 3535 8229 3563 8198
3580 8158 3578 8155 3579 8145 3576 8138
3580 8134
TIME...MOT...LOC 1844Z 284DEG 21KT 3578 8134 3559 8153 3555 8183 3530
8226
RWHThe Greer radar (KGSP), 57 km away, was scanning. The volume nearest the first event began at 19:11 UTC.
4 thunderstorm wind. Local standard time, as filed.
County comms reported multiple trees down near the Rutherford County line including on Polk County Line Rd and Rock Springs Rd.
County comms and the public reported numerous trees blown down in the area around Fox Mountain Rd, Smith Dairy Rd, and Huntview Ln.
Public reported trees uprooted on Hogan Rd near Highway 221.
County comms reported multiple trees blown down south of Boiling Springs.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in North Carolina in 2018Every state in 2018This day in weather historyWarnings in North Carolina, 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: 769861, 769862, 770627, 769863.