Alert archive / South Carolina / Tornado Warnings in 2020
Tornado Warning 22, NWS Wilmington, NC
NWS Wilmington, NC issued this tornado warning at Sep 17, 2020, 3:44 PM EDT for Dillon County, Florence County, Marion County, South Carolina. It was in force for 9 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, 3:44 PM EDT (19:44 UTC)
- Expired
- Sep 17, 2020, 3:53 PM EDT
- In force
- 9 min
- Issued by
- NWS Wilmington, NC
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.0 in
Counties Dillon County, SC, Florence County, SC, Marion County, SC
The radar
The Wilmington radar (KLTX), 104 km from the middle of the area, began a volume at 19:47 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, 7.7 hours before the alert went out and 156 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.
662
WFUS52 KILM 171944
TORILM
SCC033-041-067-172015-
/O.NEW.KILM.TO.W.0022.200917T1944Z-200917T2015Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Wilmington NC
344 PM EDT Thu Sep 17 2020
The National Weather Service in Wilmington has issued a
* Tornado Warning for...
North central Florence County in northeastern South Carolina...
Southwestern Dillon County in northeastern South Carolina...
Northwestern Marion County in northeastern South Carolina...
* Until 415 PM EDT.
* At 344 PM EDT, a severe thunderstorm capable of producing a tornado
was located over Claussen, or 8 miles southeast of Florence, moving
northeast at 30 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...
Blue Brick around 405 PM EDT.
Latta and Sellers around 415 PM EDT.
This includes Interstate 95 IN South Carolina between mile markers
183 and 185.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3416 7956 3421 7963 3439 7949 3428 7932
TIME...MOT...LOC 1944Z 221DEG 25KT 3411 7965
TORNADO...RADAR INDICATED
HAIL...0.00IN
$$
VAO1 follow-up statement
970
WWUS52 KILM 171953
SVSILM
Severe Weather Statement
National Weather Service Wilmington NC
353 PM EDT Thu Sep 17 2020
SCC033-041-067-172003-
/O.CAN.KILM.TO.W.0022.000000T0000Z-200917T2015Z/
Florence SC-Dillon SC-Marion SC-
353 PM EDT Thu Sep 17 2020
...THE TORNADO WARNING FOR NORTH CENTRAL FLORENCE...SOUTHWESTERN
DILLON AND NORTHWESTERN MARION COUNTIES IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning has been cancelled. However heavy rain is
still possible with this thunderstorm.
A Tornado Watch remains in effect until 600 PM EDT for northeastern
South Carolina.
LAT...LON 3416 7956 3421 7963 3439 7949 3428 7932
TIME...MOT...LOC 1951Z 221DEG 25KT 3416 7960
$$
VAOThe office that day
Everything else NWS Wilmington, NC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 17, 11:45 AM EDT | River Flood Warning | ILM | Darlington, Florence | 5 days |
| Sep 17, 1:08 PM EDT | Flash Flood Warning | ILM | Darlington, Florence | 3 hr |
| Sep 17, 1:38 PM EDT | Tornado Warning | ILM | Darlington, Florence | 37 min |
| Sep 17, 1:46 PM EDT | Tornado Warning | ILM | Horry | 29 min |
| Sep 17, 1:56 PM EDT | Areal Flood Advisory | ILM | Horry | 41 min |
| Sep 17, 2:23 PM EDT | Areal Flood Advisory | ILM | Darlington, Florence, Marlboro | 3 hr |
| Sep 17, 2:42 PM EDT | Severe Thunderstorm Warning | ILM | Darlington, Florence | 33 min |
| Sep 17, 2:54 PM EDT | Flash Flood Warning | ILM | Darlington, Dillon, Florence, Marlboro | 3 hr |
| Sep 17, 3:17 PM EDT | Tornado Warning | ILM | Florence, Marion | 28 min |
| Sep 17, 3:32 PM EDT | Areal Flood Advisory | ILM | Florence, Williamsburg | 106 min |
| Sep 17, 4:00 PM EDT | Tornado Warning | ILM | Dillon, Marion | 13 min |
| Sep 17, 4:14 PM EDT | Areal Flood Advisory | ILM | Dillon, Florence, Marion | 109 min |
| Sep 17, 4:45 PM EDT | Special Weather Statement | ILM | Georgetown | 30 min |
| Sep 17, 5:45 PM EDT | Areal Flood Advisory | ILM | Georgetown, Horry, Marion | 2 hr |
| Sep 17, 6:41 PM EDT | Special Weather Statement | ILM | Horry | 34 min |
| Sep 17, 6:51 PM EDT | Tornado Warning | ILM | Horry | 24 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.