Scattered thunderstorms developed across upstate South Carolina during the afternoon and evening. One storm produced brief severe weather in Anderson County.
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 developed across upstate South Carolina during the afternoon and evening. One storm produced brief severe weather in Anderson County.
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 14, 3:32 PM EST, 1 hour 22 minutes earlier.
Area Forecast Discussion
National Weather Service Greenville-Spartanburg SC
432 PM EDT Sun Jun 14 2020
.SYNOPSIS...
An unsettled weather pattern is expected to continue through the end
of the week as an upper closed low lingers near the Carolinas. With
showers and thunderstorms expected each day, temperatures will be
several degrees cooler than normal through mid week followed by a
gradual warming trend.
&&
.NEAR TERM /THROUGH MONDAY/...
As of 438 PM EDT Sunday: Radar/satellite trends are generally in
agreement with the fcst, altho the numerous showers and storms
were already moving east off the Blue Ridge Escarpment. Will
have to speed up the fcst to account for this trend. Still think
the coverage will decrease the farther east the storms attempt
to move. Still think we have a shot at a few more strong/severe
cells for the next short while, but they better hurry up and do
it because the environment gets more and more inhospitable as you
move to the east off the mtns. The slowly-moving storms may produce
localized hydro problems as well across the mountains through mid
evening before the convection wanes and moves east.
Otherwise, an upper low will drift toward the Appalachians
tonight and then become centered over the southern Appalachians
on Monday. Meanwhile, sprawling 1032 mb surface high pressure
stretching from the eastern Great Lakes to New England will nose
southward to aid cold air damming development across the region,
with wedging possibly setting up as far southwest as the Savannah
River. The combination of persistent upper QG forcing east of the
low center, a developing easterly upslope flow, and upglide over
any establishing wedge layer will permit solid chances of rain or
showers to continue through most of the near-term period, especially
across western NC. Thunder chances on Monday should be relegated to
far southwest sections under the colder pocket of temperatures aloft
near the H5 low center. With cold air damming established, much of
the northern tier will see temperatures struggling through the 60s
through the day on Monday under clouds and occasional rain/showers.
&&
.SHORT TERM /MONDAY NIGHT THROUGH WEDNESDAY/...
As of 230 PM EDT Sunday: The short-term fcst picks up at 00z on
Tuesday with a closed h5 low developing right over the Carolinas
as the period begins. The low is expected to remain nearly stationary
thru the period as broad Canadian high pressure will be centered to
our north. The high will gradually shift eastward thru the period,
keeping NLY to NELY low-lvl flow over the area. At the same time,
a weak wedge develops just east of the Appalachians as a weak coastal
low tries to form along the SE Coast. Overall, with deeper moisture
in place over the area thru most of the period, the chances for sct
to widespread showers and thunderstorms remain elevated. I kept solid
chance to likely PoPs over most of the CWFA for both Tues and Wed
with the highest PoPs generally over the eastern zones. As is typical
of wedge-type patterns, the best chances for thunder will be around
the periphery of the wedge where decent instability is expected. In
addition, with the wedge in place temps will remain well-below normal
for mid-June.
&&
.LONG TERM /WEDNESDAY NIGHT THROUGH SUNDAY/...
As of 215 PM EDT Sunday: The extended forecast picks up at 00z on
Thursday with a large, closed upper low centered over the Carolinas.
The long range guidance continues to keep this system over the
Southeast thru Thursday and begins to open it back up on Friday as
it shifts NE and towards the Atlantic Coast. Over the weekend,
what's left of the system deamplifies and drifts offshore. At the
sfc, broad Canadian high pressure will be in place to our north
with weak wedging still in place over the CWFA as the period begins.
Over the next couple of days, the high gradually shifts eastward
and offshore while a weak low tries to spin up along the SE Coast.
Most of the model guidance still doesn't have the low develop much
structure thru the period, and it remains difficult to predict
exactly where it will spin up. We do continue to get fairly deep
wrap-around moisture over much the CWFA into Friday with some degree
of drying later in the day, and additional drying over the weekend.
As for the sensible fcst, I kept a solid chance to likely PoP over
the CWFA for Thurs with PoPs tapering off to more typical diurnal
values for Friday. For the weekend, I limit them to slight chance
over most of the CWFA. Otherwise, temps will steadily warm thru the
period, and are expected to approach climatology by Friday and will
likely run just above climo over the weekend.
&&
.AVIATION /21Z SUNDAY THROUGH FRIDAY/...
At KCLT and elsewhere: Convective chances this afternoon and evening
appear best around KAVL, with a gusty wind threat apparent as well.
Thus, have TEMPO TSRA for KAVL with gusts after 19Z, but will also
advertise TEMPO TSRA surviving east toward KHKY, albeit without the
gusts, through early evening. Elsewhere, VCSH or VCTS should cover
any activity surviving eastward through the evening hours. As
upglide flow gets established over an incipient wedge, expect MVFR
cigs to develop overnight and lower to IFR in many locations before
daybreak. Limited recovery of cigs is likely through Monday, and
rain and shower chances will persist through much of the period.
After a brief window of variable ENE/ESE winds at KCLT, anticipate
NE flow everywhere east of the mountains tonight into Monday,
becoming gusty at times Monday morning. KAVL will see winds toggle
from SE this afternoon to NW tonight back to SE Monday.
Outlook: Moisture will return and persist through the middle part of
the week as a low pressure system wobbles atop the area through at
least Wednesday and perhaps Thursday. Afternoon and evening showers
and thunderstorms will be possible east day. Expect morning
restrictions and also restrictions under any heavier showers.
Confidence Table...
20-02Z 02-08Z 08-14Z 14-18Z
KCLT High 100% High 100% Med 79% High 93%
KGSP High 100% High 90% High 82% High 88%
KAVL High 100% High 100% High 80% High 89%
KHKY High 100% Low 58% Med 70% High 90%
KGMU High 100% High 90% Med 75% High 89%
KAND High 100% High 100% Med 69% High 88%
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...DEO
NEAR TERM...HG/PM
SHORT TERM...JPT
LONG TERM...JPT
AVIATION...HGHazardous Weather Outlook National Weather Service Greenville-Spartanburg SC 835 AM EDT Sun Jun 14 2020 GAZ010-017-NCZ033-048>053-058-059-062>065-501-503-505-507-509- SCZ001>003-151245- Rabun-Habersham-Avery-Madison-Yancey-Mitchell-Swain-Haywood-Buncombe- Graham-Northern Jackson-Macon-Southern Jackson-Transylvania- Henderson-Caldwell Mountains-Burke Mountains-McDowell Mountains- Rutherford Mountains-Polk Mountains-Oconee Mountains- Pickens Mountains-Greenville Mountains- 835 AM EDT Sun Jun 14 2020 This Hazardous Weather Outlook is for the mountains of northeast Georgia, western North Carolina, and Upstate South Carolina. .DAY ONE...Today and tonight. Scattered to numerous thunderstorms will develop across the mountains this afternoon and evening. Cloud to ground lightning and locally heavy rainfall can be expected with any thunderstorms. Some of these storms may also produce gusty winds and small hail, and a few could become severe, with damaging wind gusts the main threat. .DAYS TWO THROUGH SEVEN...Monday through Saturday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... None. GAZ018-026-028-029-NCZ035>037-056-057-068>072-082-502-504-506-508- 510-SCZ004>014-019-151245- Stephens-Franklin-Hart-Elbert-Alexander-Iredell-Davie-Catawba-Rowan- Cleveland-Lincoln-Gaston-Mecklenburg-Cabarrus-Union NC- Greater Caldwell-Greater Burke-Eastern McDowell-Greater Rutherford- Eastern Polk-Greater Oconee-Greater Pickens-Greater Greenville- Spartanburg-Cherokee-York-Anderson-Abbeville-Laurens-Union SC- Chester-Greenwood- 835 AM EDT Sun Jun 14 2020 This Hazardous Weather Outlook is for northeast Georgia, the foothills and Piedmont of western North Carolina, and Upstate South Carolina. .DAY ONE...Today and tonight. Isolated to scattered thunderstorms are expected across the region this afternoon and evening. Cloud to ground lightning and locally heavy rainfall will be the primary threat with any thunderstorms, and a few could produce gusty winds. .DAYS TWO THROUGH SEVEN...Monday through Saturday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... None. HG
Special Weather Statement
National Weather Service Greenville-Spartanburg SC
300 PM EDT Sun Jun 14 2020
NCZ062-141945-
Macon NC-
300 PM EDT Sun Jun 14 2020
...A STRONG THUNDERSTORM WILL IMPACT SOUTHWESTERN MACON COUNTY UNTIL
345 PM EDT...
At 259 PM EDT, Doppler radar was tracking a strong thunderstorm 11
miles southwest of Franklin, or 6 miles southeast of Nantahala Lake,
moving southeast at 10 mph.
Locations to be impacted include...
Otto, Rainbow Springs and Wayah Bald.
Wind gusts up to 40 mph and dime-size hail will be possible in these
areas.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Dime to nickel size hail can cause considerable damage to vehicles.
Consider moving vehicles to a covered storage area before the storm
arrives.
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 3519 8362 3511 8335 3499 8344 3499 8348
3500 8351 3500 8352 3502 8352 3504 8356
3507 8357 3509 8359 3511 8362 3513 8362
3512 8364 3514 8364 3514 8365
TIME...MOT...LOC 1859Z 300DEG 8KT 3511 8357
08Special Weather Statement
National Weather Service Greenville-Spartanburg SC
316 PM EDT Sun Jun 14 2020
NCZ048-141945-
Madison NC-
316 PM EDT Sun Jun 14 2020
...A STRONG THUNDERSTORM WILL IMPACT SOUTHWESTERN MADISON COUNTY
UNTIL 345 PM EDT...
At 315 PM EDT, Doppler radar was tracking a strong thunderstorm 8
miles northwest of Marshall, or near Hot Springs, moving southeast at
10 mph.
Locations to be impacted include...
Marshall, Hot Springs, Spring Creek, Walnut and Luck.
Wind gusts up to 40 mph and dime size hail will be possible in these
areas.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Dime to nickel size hail can cause considerable damage to vehicles.
Consider moving vehicles to a covered storage area before the storm
arrives.
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 3580 8263 3569 8287 3584 8292 3586 8292
3593 8280
TIME...MOT...LOC 1915Z 328DEG 7KT 3584 8283
08Special Weather Statement
National Weather Service Greenville-Spartanburg SC
325 PM EDT Sun Jun 14 2020
NCZ059-063-142000-
Southern Jackson NC-Northern Jackson NC-
325 PM EDT Sun Jun 14 2020
...A STRONG THUNDERSTORM WITH INTENSE LIGHTNING WILL IMPACT CENTRAL
JACKSON COUNTY UNTIL 400 PM EDT...
At 325 PM EDT, Doppler radar was tracking a strong thunderstorm with
intense lightning 11 miles southeast of Sylva, or 4 miles northeast
of Lake Glenville, moving southeast at 10 mph.
Locations to be impacted include...
Cashiers, Lake Glenville, Cullowhee, Wolf Mountain, Whiteside
Mountain and Tuckasegee.
In addition to intense lightning, wind gusts up to 40 mph, half inch
hail and very heavy rainfall rates up to 2 inches per hour 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.
Frequent lightning is occurring with this storm. 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 storm approaches.
&&
LAT...LON 3528 8324 3534 8308 3522 8296 3519 8297
3519 8299 3517 8298 3516 8300 3515 8299
3507 8315 3509 8315 3510 8316
TIME...MOT...LOC 1925Z 331DEG 9KT 3524 8311
08Special Weather Statement
National Weather Service Greenville-Spartanburg SC
418 PM EDT Sun Jun 14 2020
GAZ010-SCZ001-142100-
Rabun GA-Oconee Mountains SC-
418 PM EDT Sun Jun 14 2020
...A STRONG THUNDERSTORM WILL IMPACT CENTRAL RABUN AND CENTRAL OCONEE
COUNTIES UNTIL 500 PM EDT...
At 418 PM EDT, Doppler radar was tracking a strong thunderstorm near
Clayton, moving southeast at 20 mph.
Locations to be impacted include...
Walhalla, Clayton, Westminster, Mountain City, Tiger, Oconee State
Park, Black Rock Mountain State Park, Sky Valley, Mountain Rest and
Long Creek.
Wind gusts up to 40 mph, nickel size hail and very heavy rainfall
rates up to 2 inches per hour will be possible in these areas.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Dime to nickel size hail can cause considerable damage to vehicles.
Consider moving vehicles to a covered storage area before the storm
arrives.
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 3499 8335 3482 8295 3465 8310 3461 8315
3485 8348
TIME...MOT...LOC 2018Z 305DEG 16KT 3488 8334
08The Greer radar (KGSP), 46 km away, was scanning. The volume nearest the first event began at 21:53 UTC.
1 thunderstorm wind. Local standard time, as filed.
Law enforcement reported trees blown down near the intersection of Sharon Church Rd and James Mattison Rd.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in South Carolina in 2020Every state in 2020This day in weather historyWarnings in South Carolina, June 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: 905121.