Weak mid-level energy rounding the east side of a trough of low pressure led to the development of strong/severe thunderstorms across Southeast South Carolina.
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 CHS wrote it up.
Weak mid-level energy rounding the east side of a trough of low pressure led to the development of strong/severe thunderstorms across Southeast South Carolina.
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 Charleston, SC wrote its last area forecast discussion before the first event at Jun 19, 2:31 PM EST, 29 minutes earlier.
Area Forecast Discussion...CORRECTED National Weather Service Charleston SC 331 PM EDT Fri Jun 19 2020 .SYNOPSIS... Atlantic high pressure will gradually build in this weekend into early next week. A cold front will drop into the area during the middle to latter part of next week. && .NEAR TERM /UNTIL 6 AM SATURDAY MORNING/... Scattered showers/tstms have developed across much of the region this afternoon ahead of a weak lobe of vorticity rounding the east side the upper trough to the west. Convection has generally concentrated along the sea breeze and outflow boundaries with updrafts being occasionally augmented where boundaries collide and interact. Convection will linger for the remainder of the afternoon and into early this evening before slowly diminishing as instability wanes with the loss of heating. Elevated hail and downdraft CAPE values will support a risk for isolated damaging winds and/or large hail events through sunset. Lows will range from the upper 60s inland with lower 70s at the coast with mid 70s at the beaches. && .SHORT TERM /6 AM SATURDAY MORNING THROUGH MONDAY/... The area will largely remain under the influence of Atlantic high pressure through the period, although a weak trough will linger inland. Aloft, heights will gradually build as the persistent trough over the eastern CONUS finally shifts off the coast. This set-up will favor a typical summertime pattern, with isolated to scattered showers and thunderstorms possible, primarily in the afternoon and evenings. Coverage looks to be highest on Saturday. Overall, the threat for organized severe weather is low, but as typical this time of year, a few brief strong to severe storms are not out of the question. High temperatures in the upper 80s/around 90 on Saturday will warm to the low/mid 90s by Monday. Lows will be within a few degrees of normal. && .LONG TERM /MONDAY NIGHT THROUGH FRIDAY/... A broad upper level trough will affected the area during the middle part of next week, pushing a cold front into the area. Fairly good coverage of showers and tstms expected, especially Wednesday and Thursday. Temperatures will cool down slightly. && .AVIATION /19Z FRIDAY THROUGH WEDNESDAY/... VFR for much of the period. Best chances for tstm impacts at KCHS will be from 22-02z and 18-22z at KSAV. There is still enough timing/coverage uncertainties at this point to maintain a mention of VCTS at both sites and not introduce either a prevailing or TEMPO group. Extended Aviation Outlook: Mainly VFR. Brief flight restrictions are possible in afternoon/evening showers and tstms. && .MARINE... Tonight: There are no concerns southeast winds will gradually veer to the southwest and west overnight with speeds less than 10 kt. Seas will average 1-3 ft. Saturday through Wednesday: High pressure centered east of the waters will be the primary feature this weekend through much of next week. South to southwest winds will prevail much of time with speeds 15 knots or less. Seas will average 2-3 feet, perhaps up to 4 ft at times in the outer portions of the marine zones. && .TIDES/COASTAL FLOODING... Tide levels in Charleston Harbor are expected to peak 6.7-6.9 ft MLLW. This is just below Coastal Flood Advisory criteria. Given the marginal nature of this event and onshore winds are still fairly light, A Coastal Flood Advisory will not be issued. Above normal water levels expected through early next week, primarily due to the upcoming new moon. There is a low probability for minor coastal flooding during the evening high tides along the South Carolina coast, especially near Charleston. && .CHS WATCHES/WARNINGS/ADVISORIES... GA...None. SC...None. MARINE...None. &&
Hazardous Weather Outlook National Weather Service Charleston SC 931 AM EDT Fri Jun 19 2020 SCZ048>050-201345- Beaufort-Coastal Colleton-Charleston- 931 AM EDT Fri Jun 19 2020 This Hazardous Weather Outlook is for southeast South Carolina. .DAY ONE...Today and tonight. Severe Thunderstorms: Scattered showers and thunderstorms are expected to develop across Southeast South Carolina and Southeast Georgia this afternoon and evening. A few of these thunderstorms will be capable of producing damaging winds and large hail. The risk for severe thunderstorms will be the greatest between 2 PM and 9 PM. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Coastal Flooding: The upcoming new moon and a slight increase in swells will contribute to elevated tide levels into early next week. There is a low probability for minor coastal flooding during the evening high tides along the South Carolina coast, especially near Charleston. .SPOTTER INFORMATION STATEMENT... Please relay any reports of hazardous weather including, but not limited to large hail, damaging winds and flooding to the National Weather Service in Charleston at 1-888-383-2024. AMZ330-350-352-354-374-201345- Charleston Harbor- Waters from South Santee River to Edisto Beach SC out 20 NM- Waters from Edisto Beach SC to Savannah GA out 20 NM- Waters from Savannah GA to Altamaha Sound GA out 20 NM, including Grays Reef National Marine Sanctuary- Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM- 931 AM EDT Fri Jun 19 2020 This Hazardous Weather Outlook is for Atlantic coastal waters. .DAY ONE...Today and tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter assistance is not anticipated at this time. GAZ087-088-099>101-114>119-137>141-SCZ040-042>045-047-051-052-201345- Jenkins-Screven-Candler-Bulloch-Effingham-Tattnall-Evans- Inland Bryan-Coastal Bryan-Inland Chatham-Coastal Chatham-Long- Inland Liberty-Coastal Liberty-Inland McIntosh-Coastal McIntosh- Allendale-Hampton-Inland Colleton-Dorchester-Inland Berkeley- Inland Jasper-Coastal Jasper-Tidal Berkeley- 931 AM EDT Fri Jun 19 2020 This Hazardous Weather Outlook is for southeast Georgia and southeast South Carolina. .DAY ONE...Today and tonight. Severe Thunderstorms: Scattered showers and thunderstorms are expected to develop across Southeast South Carolina and Southeast Georgia this afternoon and evening. A few of these thunderstorms will be capable of producing damaging winds and large hail. The risk for severe thunderstorms will be the greatest between 2 PM and 9 PM. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Please relay any reports of hazardous weather including, but not limited to large hail, damaging winds and flooding to the National Weather Service in Charleston at 1-888-383-2024.
Special Weather Statement
National Weather Service Charleston SC
240 PM EDT Fri Jun 19 2020
SCZ045-191930-
Inland Berkeley-
240 PM EDT Fri Jun 19 2020
...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF BERKELEY COUNTY...
...MARINERS ON LAKE MOULTRIE AND EASTERN LAKE MARION SHOULD SEEK
SAFE HARBOR...
At 239 PM EDT, National Weather Service doppler radar indicated
strong thunderstorms along a line extending from Summerton to near
Holly Hill, and moving east at 25 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 these storms include...
Moncks Corner, Eadytown, Cross, Lake Moultrie, Bonneau Beach,
Eastern Lake Marion and Pinopolis.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Boaters on Lake Moultrie and the eastern portions of Lake Marion
should seek safe harbor immediately. If caught on the open water,
stay as low as possible and wear a personal flotation device.
Remember, if you can hear thunder you are at risk for being struck by
lightning.
Excessive cloud to ground lightning is occurring with these storms.
Lightning can strike 15 miles away from a thunderstorm. Seek safe
shelter inside a building or vehicle.
&&
LAT...LON 3350 7998 3319 8001 3324 8035 3326 8036
3328 8035 3327 8030 3330 8025 3338 8024
3339 8022 3345 8022 3345 8014 3348 8015
3350 8012 3350 8009 3351 8008 3351 7999
TIME...MOT...LOC 1839Z 261DEG 23KT 3361 8033 3332 8037Special Weather Statement
National Weather Service Charleston SC
243 PM EDT Fri Jun 19 2020
GAZ140-141-191915-
Inland McIntosh-Coastal McIntosh-
243 PM EDT Fri Jun 19 2020
...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF MCINTOSH COUNTY...
At 243 PM EDT, National Weather Service doppler radar indicated a
strong thunderstorm over Pine Harbor, or 13 miles north of Darien,
moving northeast 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...
Eulonia, Pine Harbor, Crescent, Harris Neck and Shellman Bluff.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Report damage directly to the Charleston National Weather Service at
1-888-383-2024 when it is safe to do so. You can also email your
report to nws.charlestonsc@noaa.gov.
&&
LAT...LON 3160 8150 3164 8125 3164 8124 3163 8122
3161 8121 3154 8119 3147 8148
TIME...MOT...LOC 1843Z 216DEG 7KT 3156 8138Special Weather Statement
National Weather Service Charleston SC
253 PM EDT Fri Jun 19 2020
GAZ118-119-SCZ047-051-191930-
Coastal Chatham-Inland Chatham-Inland Jasper-Coastal Jasper-
253 PM EDT Fri Jun 19 2020
...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF CHATHAM AND JASPER
COUNTIES...
At 253 PM EDT, National Weather Service doppler radar indicated a
strong thunderstorm near Garden City, or near Savannah International
Airport, moving north at 10 mph.
HAZARD...strong winds 45 to 55 mph and up to nickel 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...
Pooler, Hunter Army Airfield, Downtown Savannah, Godley Station,
Savannah International Airport, Garden City, Port Wentworth and
Hardeeville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Report damage directly to the Charleston National Weather Service at
1-888-383-2024 when it is safe to do so. You can also email your
report to nws.charlestonsc@noaa.gov.
&&
LAT...LON 3216 8131 3220 8125 3223 8117 3223 8114
3224 8115 3229 8102 3208 8100 3200 8117
TIME...MOT...LOC 1853Z 164DEG 8KT 3213 8113
ETMSpecial Weather Statement
National Weather Service Charleston SC
318 PM EDT Fri Jun 19 2020
GAZ140-141-191945-
Inland McIntosh-Coastal McIntosh-
318 PM EDT Fri Jun 19 2020
...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF MCINTOSH COUNTY...
At 317 PM EDT, National Weather Service doppler radar indicated a
strong thunderstorm over Pine Harbor, or 12 miles north of Darien,
moving east 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...
Crescent, Shellman Bluff, Eulonia, Pine Harbor, Blackbeard Island,
Valona, Sapelo Island and South Newport.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Report damage directly to the Charleston National Weather Service at
1-888-383-2024 when it is safe to do so. You can also email your
report to nws.charlestonsc@noaa.gov.
&&
LAT...LON 3152 8147 3165 8141 3165 8133 3162 8122
3160 8119 3156 8120 3154 8118 3157 8116
3156 8115 3153 8115 3140 8123
TIME...MOT...LOC 1917Z 290DEG 9KT 3154 8135
ETMSpecial Weather Statement
National Weather Service Charleston SC
339 PM EDT Fri Jun 19 2020
SCZ043-048-049-192015-
Coastal Colleton-Beaufort-Inland Colleton-
339 PM EDT Fri Jun 19 2020
...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF BEAUFORT AND COLLETON
COUNTIES...
At 338 PM EDT, National Weather Service doppler radar indicated a
strong thunderstorm over White Hall, or 9 miles east of Yemassee,
moving east at 20 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...
Yemassee, Green Pond, Gardens Corner, Sheldon, Ashepoo, Pocotaligo,
Ritter and White Hall.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Report damage directly to the Charleston National Weather Service at
1-888-383-2024 when it is safe to do so. You can also email your
report to nws.charlestonsc@noaa.gov.
&&
LAT...LON 3261 8046 3257 8083 3259 8083 3261 8084
3268 8086 3271 8083 3272 8085 3275 8085
3283 8047
TIME...MOT...LOC 1938Z 266DEG 20KT 3270 8069
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</html>The Charleston,SC radar (KCLX), 38 km away, was scanning. The volume nearest the first event began at 19:58 UTC.
2 thunderstorm wind. Local standard time, as filed.
The South Carolina Highway Patrol reported a tree down near the intersection of White Hall Road and Ace Basin Parkway.
A trained spotter reported two power lines down.
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 2026-10-01. Each event’s entry at NCEI: 900806, 900809.