Daytime heating allowed scattered afternoon thunderstorms to develop.
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.
Daytime heating allowed scattered afternoon thunderstorms to develop.
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 24, 1:16 PM EST, 1 hour 38 minutes earlier.
Area Forecast Discussion National Weather Service Columbia SC 216 PM EDT Sat Jun 24 2017 .SYNOPSIS... A slow moving cold front will be in the region through Monday. Showers and thunderstorms will be associated with the front. Drier and cooler weather will follow the front by the middle of next week. && .NEAR TERM /THROUGH TONIGHT/... A shortwave upper trough moving through northern Alabama this afternoon will progress into North Carolina by Sunday morning. The trough is spurring a broad area of shower and thunderstorm development across Georgia and into the northwest half of South Carolina. Expect this activity to persist the remainder of the afternoon into tonight. Localized flash flooding will be possible when thunderstorms train. Activity will diminish toward Sunday morning. && .SHORT TERM /SUNDAY THROUGH SUNDAY NIGHT/... Frontal boundary will be slowly sinking south through the area on Sunday. Some question as to how far south it will be during the morning hours and where it might be when convection initiates from heating. Should be a strong gradient in precipitable water values across the forecast area with values around 1.5 inches northern and western Midlands increasing to near or above 2 inches in the southeastern Midlands. Drier air will be working into the area from the northwest through the day but it may be slow and will carry a gradient in pops from slight chance northwest to high chance in the southeastern parts of the forecast area. Debris clouds from convection today may limit initial heating and instability on Sunday but expect convection to develop in the vicinity of the boundary across the southeastern Midlands and shift southeast through the afternoon. Temperatures will be slightly cooler Sunday compared to today but still in the upper 80s to around 90 degrees. Cooler and drier air will filter into the region Sunday night ending precipitation chances and supporting overnight lows in the 60s. && .LONG TERM /MONDAY THROUGH FRIDAY/... Reasonable agreement among the medium range models regarding the overall pattern during the extended forecast period which should support generally cooler and drier conditions. The upper level pattern on Monday will feature a broad trough across the eastern half of the country with a ridge over the intermountain west and along the west coast. The cold front that pushed through the area will be stalled offshore as high pressure and northerly flow dominate across the region with dewpoints dropping into the 50s to lower 60s. Atmospheric moisture will be unseasonably low with precipitable water values below an inch resulting minimal to no instability. The broad upper trough will amplify a bit late Monday night and Tuesday with shortwave energy diving across the Ohio Valley and Mid- Atlantic region which will bring another surge of cooler and drier air to the forecast area Tuesday night. There is some uncertainty with how much moisture will be available to interact with the shortwave and whether or not it will be enough to produce precipitation. The ECMWF is more aggressive with better moisture and higher pops compared to the GFS/Canadian. Will continue with previously dry forecast which is also in line with WPC. The cooler and drier weather will continue through mid week with surface high pressure in control at the surface and northwesterly 500mb flow becoming more zonal on Wednesday and Thursday. Differences become more pronounced late in the period. The upper ridge over the western Atlantic builds back over the southeastern states Thu/Fri with increasing low level moisture Fri/Sat as the surface high shifts offshore and a moist southerly flow returns. The GFS is depicting a digging trough over the upper midwest and Great Lakes region Fri/Sat with precipitable water values increasing back to around 2 inches while the ECWMF is less amplified with that feature, keeping a stronger ridge over the southeast with less deep moisture available. Will carry low pops Fri/Sat for mainly diurnal convection at this time. Temperatures through the period will be near normal Monday then below normal Tue/Wed and returning back to near or above normal by the end of the extended period. && .AVIATION /18Z SATURDAY THROUGH THURSDAY/... MVFR ceilings and visibilities are likely from 18Z to 03Z at TAF sites due to showers and thunderstorms. There is a better chance of VFR conditions after 06Z as a cold front continues to sag southward toward the GA/SC coasts. EXTENDED AVIATION OUTLOOK...No significant aviation related issues expected. && .CAE WATCHES/WARNINGS/ADVISORIES... GA...None. SC...None. &&
Hazardous Weather Outlook National Weather Service Columbia SC 152 PM EDT Sat Jun 24 2017 GAZ040-063>065-077-SCZ015-016-018-020>022-025>031-035>038-041-251800- Lincoln-McDuffie-Columbia-Richmond-Burke-Lancaster-Chesterfield- McCormick-Newberry-Fairfield-Kershaw-Edgefield-Saluda-Lexington- Richland-Lee-Aiken-Sumter-Barnwell-Orangeburg-Calhoun-Clarendon- Bamberg- 152 PM EDT Sat Jun 24 2017 This Hazardous Weather Outlook is for the Midlands of South Carolina and the Central Savannah River area of Georgia. .DAY ONE...This Afternoon and Tonight. Localized flash flooding and strong gusty winds will be possible with thunderstorms this afternoon and evening. .DAYS TWO THROUGH SEVEN...Sunday through Friday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
Special Weather Statement
National Weather Service Columbia SC
302 PM EDT SAT JUN 24 2017
SCZ020-027-028-241945-
Lexington-Newberry-Richland-
302 PM EDT SAT JUN 24 2017
...A STRONG THUNDERSTORM WILL AFFECT SOUTHWESTERN FAIRFIELD...
SOUTHEASTERN NEWBERRY...NORTHWESTERN LEXINGTON AND NORTHWESTERN
RICHLAND COUNTIES...
At 301 PM EDT, a strong thunderstorm was located 7 miles west of
Lexington, moving northeast at 25 mph.
Winds up to 40 mph are possible with this storm.
Locations impacted include...
Columbia, Lexington, West Columbia, Irmo, St. Andrews, Oak Grove,
Gilbert, Summit, Seven Oaks and Lake Murray Of Richland.
Frequent cloud to ground lightning will occur with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
If you are on or near Lake Murray, get out of the water and move
indoors or inside a vehicle. Remember, lightning can strike out to
10 miles from the parent thunderstorm. If you can hear thunder, you
are close enough to be struck by lightning. Move to safe shelter
now! Do not be caught on the water in a thunderstorm.
LAT...LON 3421 8112 3404 8099 3390 8140 3400 8148
3421 8125 3420 8122 3418 8118 3420 8117
3422 8118
TIME...MOT...LOC 1901Z 230DEG 21KT 3400 8137
CJRThe Columbia radar (KCAE), 50 km away, was scanning. The volume nearest the first event began at 19:54 UTC.
1 lightning. Local standard time, as filed.
Lightning struck a two story residence, causing minor damage. A school alarm was also set off.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in South Carolina in 2017Every state in 2017This day in weather historyWarnings in South Carolina, June 2017
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: 698164.