Alert archive / South Carolina / Tornado Warnings in 2020
Tornado Warning 17, NWS Columbia, SC
NWS Columbia, SC issued this tornado warning at Sep 17, 2020, 7:56 AM EDT for Richland County, Sumter County, South Carolina. It was in force for 34 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Sep 17, 2020, 7:56 AM EDT (11:56 UTC)
- Expired
- Sep 17, 2020, 8:30 AM EDT
- In force
- 34 min
- Issued by
- NWS Columbia, SC
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.0 in
Counties Richland County, SC, Sumter County, SC
The radar
The Columbia radar (KCAE), 54 km from the middle of the area, began a volume at 11:58 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Charleston AFB, SC (KCHS), launched 00:00Z, 11.9 hours before the alert went out and 110 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 254 J/kg
- Mixed-layer CIN
- -35 J/kg
- Mixed-layer LCL
- 786 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 65 m²/s²
- 0-3 km storm-relative helicity
- 70 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted.
126
WFUS52 KCAE 171156
TORCAE
SCC079-085-171230-
/O.NEW.KCAE.TO.W.0017.200917T1156Z-200917T1230Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Columbia SC
756 AM EDT Thu Sep 17 2020
The National Weather Service in Columbia has issued a
* Tornado Warning for...
Southwestern Sumter County in central South Carolina...
Southeastern Richland County in central South Carolina...
* Until 830 AM EDT.
* At 756 AM EDT, a severe thunderstorm capable of producing a tornado
was located near Poinsett State Park, or 17 miles southwest of
South Sumter, moving north at 25 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed.
Damage to roofs, windows, and vehicles will occur. Tree
damage is likely.
* This dangerous storm will be near...
Poinsett State Park around 810 AM EDT.
Shaw Air Base around 830 AM EDT.
Other locations impacted by this tornadic thunderstorm include
Wedgewood, Cane Savannah, Cherryvale and Stateburg.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! If you are outdoors, in a mobile home, or in a
vehicle, move to an interior room or closet on the lowest floor of a
sturdy building immediately.
Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. Immediately move to an interior room on the lowest floor of
a sturdy building.
&&
LAT...LON 3368 8051 3369 8059 3370 8059 3370 8060
3372 8062 3374 8063 3374 8062 3375 8063
3398 8071 3397 8038
TIME...MOT...LOC 1156Z 182DEG 21KT 3371 8056
TORNADO...RADAR INDICATED
HAIL...0.00IN
$$
JAQ2 follow-up statements
371
WWUS52 KCAE 171217
SVSCAE
Severe Weather Statement
National Weather Service Columbia SC
817 AM EDT Thu Sep 17 2020
SCC079-085-171230-
/O.CON.KCAE.TO.W.0017.000000T0000Z-200917T1230Z/
Sumter SC-Richland SC-
817 AM EDT Thu Sep 17 2020
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 830 AM EDT FOR WEST
CENTRAL SUMTER AND SOUTHEASTERN RICHLAND COUNTIES...
At 817 AM EDT, a severe thunderstorm capable of producing a tornado
was located near Poinsett State Park, or 12 miles southwest of Shaw
Air Base, moving north at 20 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This tornadic thunderstorm will remain over mainly rural areas of
west central Sumter and southeastern Richland Counties, including the
following locations... Stateburg and Wedgewood.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! If you are outdoors, in a mobile home, or in a
vehicle, move to an interior room or closet on the lowest floor of a
sturdy building immediately.
Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. Immediately move to an interior room on the lowest floor of
a sturdy building.
&&
LAT...LON 3373 8055 3374 8063 3375 8062 3375 8063
3398 8071 3397 8052
TIME...MOT...LOC 1217Z 168DEG 19KT 3382 8061
TORNADO...RADAR INDICATED
HAIL...0.00IN
$$
JAQ958
WWUS52 KCAE 171229
SVSCAE
Severe Weather Statement
National Weather Service Columbia SC
829 AM EDT Thu Sep 17 2020
SCC079-085-171239-
/O.EXP.KCAE.TO.W.0017.000000T0000Z-200917T1230Z/
Sumter SC-Richland SC-
829 AM EDT Thu Sep 17 2020
...THE TORNADO WARNING FOR WEST CENTRAL SUMTER AND SOUTHEASTERN
RICHLAND COUNTIES WILL EXPIRE AT 830 AM EDT...
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning will be allowed to expire. However heavy rain
is still possible with this thunderstorm.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Columbia.
LAT...LON 3373 8055 3374 8063 3375 8062 3375 8063
3398 8071 3397 8052
TIME...MOT...LOC 1229Z 182DEG 21KT 3389 8061
$$
JAQThe office that day
Everything else NWS Columbia, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 16, 11:22 PM EDT | River Flood Advisory | CAE | Lexington, Richland | 46 hr |
| Sep 17, 8:09 AM EDT | Tornado Warning | CAE | Calhoun, Richland, Sumter | 21 min |
| Sep 17, 8:30 AM EDT | Flash Flood Warning | CAE | Aiken, Edgefield, McCormick | 3 hr |
| Sep 17, 9:22 AM EDT | Flash Flood Warning | CAE | Aiken, Barnwell, Edgefield, McCormick, Newberry, Saluda | 3 hr |
| Sep 17, 9:33 AM EDT | Tornado Warning | CAE | Calhoun, Orangeburg | 27 min |
| Sep 17, 9:46 AM EDT | River Flood Warning | CAE | Calhoun, Lexington, Richland | 35 hr |
| Sep 17, 9:46 AM EDT | River Flood Warning | CAE | Calhoun, Richland | 3 days |
| Sep 17, 9:46 AM EDT | River Flood Warning | CAE | Edgefield, McCormick | 12 hr |
| Sep 17, 10:00 AM EDT | Tornado Warning | CAE | Calhoun, Clarendon, Orangeburg | 45 min |
| Sep 17, 10:28 AM EDT | Flash Flood Warning | CAE | Bamberg, Calhoun, Clarendon, Orangeburg, Richland, Sumter | 3 hr |
| Sep 17, 10:38 AM EDT | Flash Flood Warning | CAE | Aiken, Bamberg, Barnwell, Calhoun, Fairfield, Kershaw and 6 more | 3 hr |
| Sep 17, 10:44 AM EDT | Tornado Warning | CAE | Clarendon, Sumter | 46 min |
| Sep 17, 11:01 AM EDT | Tornado Warning | CAE | Clarendon, Sumter | 29 min |
| Sep 17, 11:27 AM EDT | Tornado Warning | CAE | Lee, Sumter | 48 min |
| Sep 17, 11:44 AM EDT | Tornado Warning | CAE | Calhoun, Clarendon, Orangeburg, Sumter | 46 min |
| Sep 17, 12:06 PM EDT | Flash Flood Warning | CAE | Clarendon, Kershaw, Lee, Richland, Sumter | 3 hr |
| Sep 17, 12:39 PM EDT | Tornado Warning | CAE | Clarendon, Sumter | 33 min |
| Sep 17, 12:56 PM EDT | Tornado Warning | CAE | Calhoun, Clarendon, Orangeburg | 36 min |
| Sep 17, 1:11 PM EDT | Tornado Warning | CAE | Sumter | 49 min |
| Sep 17, 1:34 PM EDT | Flash Flood Warning | CAE | Calhoun, Clarendon, Orangeburg, Richland, Sumter | 3 hr |
| Sep 17, 2:37 PM EDT | Severe Thunderstorm Warning | CAE | Lee, Sumter | 23 min |
| Sep 17, 2:52 PM EDT | Severe Thunderstorm Warning | CAE | Clarendon | 40 min |
| Sep 17, 3:02 PM EDT | Tornado Warning | CAE | Clarendon, Sumter | 28 min |
| Sep 17, 3:19 PM EDT | Flash Flood Warning | CAE | Clarendon, Lee, Sumter | 3 hr |
| Sep 17, 5:45 PM EDT | Areal Flood Advisory | CAE | Clarendon, Orangeburg, Sumter | 60 min |
| Sep 17, 6:08 PM EDT | Special Weather Statement | CAE | Clarendon | 22 min |
Nearby
Tornado Warnings in South Carolina, 2020Every tornado warning in 2020Tornadoes in 2020
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.