Daytime heating allowed isolated severe thunderstorms to develop in the afternoon, which produced hail.
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 isolated severe thunderstorms to develop in the afternoon, which produced hail.
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 22, 1:32 PM EST, 8 minutes earlier.
Area Forecast Discussion National Weather Service Columbia SC 232 PM EDT Fri Sep 22 2017 .SYNOPSIS... Weak high pressure and an upper level trough will be over the area through tonight creating another chance of mainly afternoon and evening showers and thunderstorms. Upper level ridging will move into the region over the weekend supporting dry conditions and above normal temperatures through the middle of next week. && .NEAR TERM /THROUGH TONIGHT/... Weak high pressure over the Ohio Valley region will remain in place through tonight with upper level troughing over the eastern seaboard. Precipitable water values are around 1.4 to 1.6 this afternoon, but models show slightly drier air pushing in from the north tonight. Strong heating this afternoon has resulted in moderate instability with LI values around -4 to -6. Despite moderate instability, a well defined trigger mechanism is lacking. Severe potential appears low given weak shear and moderate instability, but cannot be ruled out given DCAPE values around 900 J/kg. Expect isolated to scattered coverage of showers and thunderstorms with the best chance south through the afternoon. Convection will again diminish with sunset with a slight chance of thunderstorms into the early overnight hours. Afternoon high temperatures are on track and will max out around 90 with overnight lows in the upper 60s. && .SHORT TERM /SATURDAY THROUGH SUNDAY NIGHT/... Upper level ridge extending from the MS River Valley to the Great Lakes region will shift northeast to the eastern Great Lakes and North Atlantic coast as weak upper level troughing over the southeastern states moves westward to the lower MS River Valley. This will keep both Jose and Maria off the east coast. Surface high pressure centered over the Ohio River Valley is expected to extend across much of the eastern half of the country. A north to northeast low level wind flow will keep a relatively dry air across the region. Dry weather is foreseen for the weekend with afternoon highs in the upper 80s and lower 90s. Overnight lows will be in the 60s. Hurricane Maria will be moving northward well offshore of Florida and SC through the weekend. Aside from increased waves and swells along the coast no impacts are expected from Hurricane Maria. && .LONG TERM /MONDAY THROUGH FRIDAY/... Models remain in good agreement through Wednesday with upper level ridge dominant across the eastern CONUS and upper level trough over the western CONUS. Surface high pressure extending from the eastern Great Lakes to the Gulf of Mexico through Wednesday will weaken for the end of next week. On Thursday the synoptic situation will begin changing as the upper level trough digs into the Great Lakes and central US. This will begin pushing a cold front southward into the Ohio Valley on Thursday. Models differ on the intensity and timing of the upper trough. Still looks like a dry forecast through Friday for our area. Temperatures through the long term will be near to slightly above normal. Hurricane Maria will also continue moving northward through the first part of the week and remaining well offshore and moving away from the region toward the end of next week. See no impacts for our area. && .AVIATION /19Z FRIDAY THROUGH WEDNESDAY/... VFR conditions expected outside of possible afternoon/evening convection and early morning fog. A weak upper level trough will gradually push east as an upper ridge builds over the Southeastern States through Saturday. Shallow low level moisture in combination with strong heating may produce isolated to scattered storms this afternoon and evening. Greater coverage is expected near AGS/DNL so have added VCSH from 18Z through 22Z. The chance remains too low elsewhere to mention at this time. Scattered cumulus expected to diminish after sunset along with the chance for convection. Weak low level winds, mostly clear skies and shallow low level moisture will once again promote a fog threat. Included MVFR fog 08Z through 13Z at fog prone sites, AGS and OGB. EXTENDED AVIATION OUTLOOK...Late night/early morning fog/stratus possible, mainly at the fog prone sites AGS and OGB. && .CAE WATCHES/WARNINGS/ADVISORIES... GA...None. SC...None. && SYNOPSIS...99 NEAR TERM...99 SHORT TERM...99 LONG TERM...99 AVIATION...99
Hazardous Weather Outlook National Weather Service Columbia SC 424 AM EDT Fri Sep 22 2017 GAZ040-063>065-077-SCZ015-016-018-020>022-025>031-035>038-041-230830- Lincoln-McDuffie-Columbia-Richmond-Burke-Lancaster-Chesterfield- McCormick-Newberry-Fairfield-Kershaw-Edgefield-Saluda-Lexington- Richland-Lee-Aiken-Sumter-Barnwell-Orangeburg-Calhoun-Clarendon- Bamberg- 424 AM EDT Fri Sep 22 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...Saturday through Thursday. 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
226 PM EDT FRI SEP 22 2017
GAZ065-SCZ030-221915-
Richmond-Aiken-
226 PM EDT FRI SEP 22 2017
...STRONG THUNDERSTORMS WILL AFFECT PARTS OF RICHMOND AND
AIKEN COUNTIES...
At 223 PM EDT, strong thunderstorm were along the Savannah
River in the Augusta, North Augusta and Savannah River Site
Area. Movement was southward near 10 mph.
The storms may contain wind gusts of 40 to 50 mph and
small hail along with dangerous lightning and heavy
downpours.
Rain totals around 2 inches will lead to ponding of water
in poor-drainage area.
Locations impacted include...
North Augusta, Augusta, Clearwater, Belvedere, and Jackson.
LAT...LON 3322 8178 3321 8178 3321 8180 3322 8181
3326 8188 3326 8192 3324 8195 3346 8212
3360 8191 3330 8162 3320 8176
TIME...MOT...LOC 1823Z 240DEG 49KT 3346 8178PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA SC
239 PM EDT FRI SEP 22 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0232 PM HAIL 3 S NORTH AUGUSTA 33.48N 81.96W
09/22/2017 M0.88 INCH AIKEN SC TRAINED SPOTTER
NICKEL TO DIME SIZED HAIL REPORTED IN NORTH
AUGUSTA NEAR THE 5TH STREET BRIDGE.
&&
CJRThe Columbia radar (KCAE), 94 km away, was scanning. The volume nearest the first event began at 18:41 UTC.
1 hail. Local standard time, as filed.
Dime to quarter size hail reported by the public. Report relayed via adjacent NWS office.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Georgia in 2017Every state in 2017This day in weather historyWarnings in Georgia, 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: 716150.