A nearly stationary surface boundary and a moist atmosphere led to thunderstorms that produced locally heavy rainfall and flooding over some areas.
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.
A nearly stationary surface boundary and a moist atmosphere led to thunderstorms that produced locally heavy rainfall and flooding over some areas.
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 Jul 16, 1:04 PM EST, 2 hours 20 minutes earlier.
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</html>Hazardous Weather Outlook National Weather Service Columbia SC 316 AM EDT Sun Jul 16 2017 GAZ040-063>065-077-SCZ015-016-018-020>022-025>031-035>038-041-170730- Lincoln-McDuffie-Columbia-Richmond-Burke-Lancaster-Chesterfield- McCormick-Newberry-Fairfield-Kershaw-Edgefield-Saluda-Lexington- Richland-Lee-Aiken-Sumter-Barnwell-Orangeburg-Calhoun-Clarendon- Bamberg- 316 AM EDT Sun Jul 16 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. Thunderstorms through Tonight could possibly contain strong to damaging winds, along with heavy rain with localized flooding. .DAYS TWO THROUGH SEVEN...Monday through Saturday. Monday, A few thunderstorms with damaging wind will be possible along a decaying surface front. The storms may also contain heavy rain with localized flooding. Friday and Saturday, heat index values may climb back above 105 degrees in many areas. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
Special Weather Statement
National Weather Service Columbia SC
218 PM EDT SUN JUL 16 2017
SCZ031-161845-
Sumter-
218 PM EDT SUN JUL 16 2017
...A STRONG THUNDERSTORM WILL AFFECT CENTRAL SUMTER COUNTIES...
At 217 PM EDT, a strong thunderstorm was just south of
Sumter, moving northeast at 10 mph.
Wind gusts up to 50 mph are possible with this storm along
with small hail. Ponding of water will occur in poor-drainage
areas. Do not drive on flooded roads.
Locations impacted include...
South Sumter.
LAT...LON 3381 8025 3378 8028 3377 8040 3375 8040
3375 8042 3384 8048 3396 8031 3383 8021
TIME...MOT...LOC 1817Z 236DEG 9KT 3386 8038Special Weather Statement
National Weather Service Columbia SC
301 PM EDT SUN JUL 16 2017
SCZ036-038-161945-
Orangeburg-Clarendon-
301 PM EDT SUN JUL 16 2017
...A STRONG THUNDERSTORM WILL AFFECT SOUTH CENTRAL CLARENDON AND EAST
CENTRAL ORANGEBURG COUNTIES...
At 300 PM EDT, a strong thunderstorm was located 7 miles northwest of
Eastern Lake Marion, or 13 miles south of Manning, moving northeast
at 15 mph.
Wind gusts up to 50 mph are possible with this storm.
Locations impacted include...
Manning, Eutawville and Vance.
Frequent cloud to ground lightning is occurring 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 Marion, 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 3350 8010 3350 8012 3348 8015 3346 8013
3346 8015 3345 8015 3346 8016 3345 8017
3345 8020 3344 8020 3345 8022 3339 8022
3332 8034 3342 8052 3370 8020 3359 8005
TIME...MOT...LOC 1900Z 230DEG 12KT 3350 8029
CJRThe Columbia radar (KCAE), 35 km away, was scanning. The volume nearest the first event began at 20:22 UTC.
3 thunderstorm wind, 3 flash flood, 1 heavy rain, 1 hail. Local standard time, as filed.
SCHP reported multiple trees down on Bookman Rd and Jay Dr.
RCWINDS gage at Spring Valley High School measured 2.88 inches of rain in a 30 minute period ending at 6:20 pm EDT (5:20 pm EST). 3.98 inches of rain fell in the one hour period ending at 6:50 pm EDT (5:50 pm EST). Total rainfall for the calendar day there was 4.69 inches.
Public reported, via social media, dime size hail on Brickyard Rd.
Public reported, via social media, a wooden backyard playset was lifted over a fence and destroyed, and a photo was provided. Additional reports of trees down on Old Barnwell Rd.
SCHP reported trees down on Bookman Rd in Kershaw Co.
Richland Co dispatch reported water getting into multiple vehicles on Two Notch Rd at Polo Rd.
Public reported, via social media, multiple vehicles stalled in floodwaters behind a grocery store at Villages of Sandhills Mall.
Columbia Fire Dept reported multiple vehicles stalled in floodwaters 9300 to 9700 Two Notch Rd.
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, July 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 2026-10-01. Each event’s entry at NCEI: 700768, 700759, 700756, 700762, 700771, 700752, 700753, 700755.