Thunderstorm activity developed along a prefrontal surface trough, a few of which produced strong damaging wind gusts.
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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.
Thunderstorm activity developed along a prefrontal surface trough, a few of which produced strong damaging wind gusts.
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 Sep 5, 1:42 PM EST, 38 minutes earlier.
Area Forecast Discussion National Weather Service Columbia SC 242 PM EDT Tue Sep 5 2017 .SYNOPSIS... Moisture will begin to increase today ahead of an approaching cold front today. The front will move through late Wednesday, increasing the chance of showers and thunderstorms, ushering in cooler and drier air into our FA Thursday into Saturday. Hurricane Irma will continue to be monitored for possible significant impacts to this area early next week. && .NEAR TERM /THROUGH TONIGHT/... Increasing moisture and convergence from a lee-side surface trough has led to showers and thunderstorms across the eastern FA. Moderate potential instability and weak wind shear suggests pulse type convection. An inverted V sounding and dry air aloft supports damaging downburst winds in a few of the stronger cells. With SW flow along the SW/NE dewpoint gradient, training storms will be possible this afternoon. Although today's PWAT values do not support heavy rain rates any training storms may cause localized flash flooding. Temperatures are expected to remain above normal with highs in the low to mid 90s. Tonight, hi-res models suggest diminishing convection in the eastern FA with loss of heating and additional development in the west associated with a shortwave ahead of the front. Thunderstorms may move into the Midlands by late evening but confidence is low. && .SHORT TERM /WEDNESDAY THROUGH THURSDAY NIGHT/... A reasonably strong cold front for the first week in September is expected to move through the area on Wednesday. Moisture will pool along and ahead of the front, while upper divergence in the right rear portion of the upper jet will provide enhanced vertical motions, supporting a considerable amount of convection. Low level winds are not particularly impressive, but a pretty robust mid level jet for this time of year should allow for some convective organization during the afternoon and evening hours moving through the area from northwest to southeast, so the marginal severe risk currently painted by SPC across the area looks prudent. Instability will be lower, especially in the northwestern portion of the CWA where the front will pass through earlier in the day, keeping the severe threat from becoming too significant. The front will be moving to the east of the area and into the Atlantic Wednesday night, so POPs will diminish accordingly. Cooler, drier air will be moving in quickly behind the front, with min temps running as much as 15 degrees cooler than Tuesday night. On Thursday and Thursday night, surface high pressure with a modified polar air mass will dominate the southeastern states. Max temps will range from the upper 70s north to the lower 80s south, with dew points down into the upper 40s to lower 50s. && .LONG TERM /FRIDAY THROUGH MONDAY/...High pressure at the surface will remain in control through Saturday with only a very modest warming trend. Winds will pick up a little by Saturday afternoon as a stronger high moves into the Great Lakes and increases the pressure gradient across the area between it and Hurricane Irma. For Sunday into early next week, it's all about Irma. The eventual path and intensity are still uncertain, so don't put too much weight on any one specific forecast. Conditions will deteriorate with time as wind and chances of rain increase. && .AVIATION /18Z TUESDAY THROUGH SUNDAY/... Expect mainly VFR conditions during the TAF period but restrictions possible in convection this afternoon if storms move over a terminal. Thunderstorms have developed across the eastern FA. Kept VCTS at OGB where impacts are most likely. Otherwise, VFR conditions primarily expected during the afternoon with southwest winds around 10 knots with some possible gusts to 15 knots. Thunderstorms may continue this evening as a weak shortwave pushes in from the west but confidence is low. Tonight, increasing SW flow ahead of the a cold front will help keep lower levels mixed and limit fog potential. Patchy stratus may develop as moisture increases ahead of the front. Although models do not suggest ceiling restrictions overnight. The front may trigger showers and thunderstorms near the end of the 24 TAF period but confidence is too low at this point to include in TAFs. EXTENDED AVIATION OUTLOOK...Scattered thunderstorms Wednesday are expect to have some level of impact at the terminals Wednesday afternoon or evening. Then, mainly VFR expected Thursday through the weekend, although winds may be on the increase on Sunday. && .CAE WATCHES/WARNINGS/ADVISORIES... GA...None. SC...None. && SYNOPSIS...99 NEAR TERM...99 SHORT TERM...99 LONG TERM...Alsheimer AVIATION...99
Hazardous Weather Outlook National Weather Service Columbia SC 224 AM EDT Tue Sep 5 2017 GAZ040-063>065-077-SCZ015-016-018-020>022-025>031-035>038-041-060630- Lincoln-McDuffie-Columbia-Richmond-Burke-Lancaster-Chesterfield- McCormick-Newberry-Fairfield-Kershaw-Edgefield-Saluda-Lexington- Richland-Lee-Aiken-Sumter-Barnwell-Orangeburg-Calhoun-Clarendon- Bamberg- 224 AM EDT Tue Sep 5 2017 This Hazardous Weather Outlook is for the Midlands of South Carolina and the Central Savannah River area of Georgia. .DAY ONE...Today and Tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Some thunderstorms Wednesday afternoon and evening will be capable of producing strong wind gusts. Hurricane Irma will have to be monitored for possible impacts on our region early next week. Please monitor official forecasts from the National Hurricane Center, and prepare accordingly. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
The Charleston,SC radar (KCLX), 71 km away, was scanning. The volume nearest the first event began at 19:20 UTC.
2 thunderstorm wind. Local standard time, as filed.
Barnwell Co SC EM reported several trees down.
Sheriff reported large limbs down on power lines on Damascus Church Rd near Damascus Church.
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, September 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: 716057, 716059.