Alert archive / South Carolina / Tornado Warnings in 2020
Tornado Warning 26, NWS Columbia, SC
NWS Columbia, SC issued this tornado warning at Sep 17, 2020, 12:56 PM EDT for Calhoun County, Clarendon County, Orangeburg County, South Carolina. It was in force for 36 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, 12:56 PM EDT (16:56 UTC)
- Expired
- Sep 17, 2020, 1:32 PM EDT
- In force
- 36 min
- Issued by
- NWS Columbia, SC
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.0 in
Counties Calhoun County, SC, Clarendon County, SC, Orangeburg County, SC
The radar
The Columbia radar (KCAE), 67 km from the middle of the area, began a volume at 17:01 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Sep 17, 10:20 AM EDT | Tornado Watch | SPC | 8 hr |
The nearest sounding before it
Charleston AFB, SC (KCHS), launched 12:00Z, 4.9 hours before the alert went out and 90 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
- 1154 J/kg
- Mixed-layer CIN
- -13 J/kg
- Mixed-layer LCL
- 652 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 188 m²/s²
- 0-3 km storm-relative helicity
- 261 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 5.7
The text
As transmitted.
916
WFUS52 KCAE 171656
TORCAE
SCC017-027-075-171745-
/O.NEW.KCAE.TO.W.0026.200917T1656Z-200917T1745Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Columbia SC
1256 PM EDT Thu Sep 17 2020
The National Weather Service in Columbia has issued a
* Tornado Warning for...
Southeastern Calhoun County in central South Carolina...
West central Clarendon County in central South Carolina...
Central Orangeburg County in central South Carolina...
* Until 145 PM EDT.
* At 1256 PM EDT, a severe thunderstorm capable of producing a
tornado was located near Bowman, or 11 miles southeast of
Brookdale, moving north at 40 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...
Elloree around 110 PM EDT.
Santee State Park around 115 PM EDT.
Other locations impacted by this tornadic thunderstorm include Poplar
Creek Landing, Creston, Stumphole Landing, Yonder Field, Cameron,
Lone Star, Low Falls Landing and Santee.
This includes Interstate 26 between mile markers 151 and 165.
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.
&&
LAT...LON 3332 8061 3337 8081 3370 8072 3366 8055
3365 8054 3365 8052 3362 8038
TIME...MOT...LOC 1656Z 201DEG 35KT 3341 8068
TORNADO...RADAR INDICATED
HAIL...0.00IN
$$
JAQ2 follow-up statements
308
WWUS52 KCAE 171716
SVSCAE
Severe Weather Statement
National Weather Service Columbia SC
116 PM EDT Thu Sep 17 2020
SCC017-027-075-171745-
/O.CON.KCAE.TO.W.0026.000000T0000Z-200917T1745Z/
Calhoun SC-Clarendon SC-Orangeburg SC-
116 PM EDT Thu Sep 17 2020
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 145 PM EDT FOR
SOUTHEASTERN CALHOUN...WEST CENTRAL CLARENDON AND CENTRAL ORANGEBURG
COUNTIES...
At 116 PM EDT, a severe thunderstorm capable of producing a tornado
was located near Elloree, or 15 miles east of Brookdale, moving
northeast at 40 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This tornadic thunderstorm will remain over mainly rural areas of
southeastern Calhoun, west central Clarendon and central Orangeburg
Counties, including the following locations... Creston, Stumphole
Landing, Lone Star, Low Falls Landing and Poplar Creek Landing.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! If you are outdoors, in a mobile home, or in a
vehicle, move to an interior room or closet on the lowest floor of a
sturdy building immediately.
&&
LAT...LON 3349 8056 3352 8067 3368 8063 3366 8055
3365 8054 3365 8052 3363 8044
TIME...MOT...LOC 1716Z 202DEG 34KT 3358 8059
TORNADO...RADAR INDICATED
HAIL...0.00IN
$$
JAQ353
WWUS52 KCAE 171732
SVSCAE
Severe Weather Statement
National Weather Service Columbia SC
132 PM EDT Thu Sep 17 2020
SCC017-027-075-171742-
/O.CAN.KCAE.TO.W.0026.000000T0000Z-200917T1745Z/
Calhoun SC-Clarendon SC-Orangeburg SC-
132 PM EDT Thu Sep 17 2020
...THE TORNADO WARNING FOR SOUTHEASTERN CALHOUN...WEST CENTRAL
CLARENDON AND CENTRAL ORANGEBURG COUNTIES IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning has been cancelled.
A Tornado Watch remains in effect until 600 PM EDT for central South
Carolina.
LAT...LON 3349 8056 3352 8067 3368 8063 3366 8055
3365 8054 3365 8052 3363 8044
TIME...MOT...LOC 1731Z 201DEG 35KT 3373 8052
$$
awpThe 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, 7:56 AM EDT | Tornado Warning | CAE | Richland, Sumter | 34 min |
| 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, 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.