Alert archive / South Carolina / Tornado Warnings in 2020

Tornado Warning 32, NWS Wilmington, NC

October 11, 2020Horry County, South Carolina

NWS Wilmington, NC issued this tornado warning at Oct 11, 2020, 4:32 PM EDT for Horry County, South Carolina. It was in force for 43 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Oct 11, 2020, 4:32 PM EDT (20:32 UTC)
Expired: Oct 11, 2020, 5:15 PM EDT
In force: 43 min
Issued by: NWS Wilmington, NC
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.0 in

County Horry County, SC

The radar

The Wilmington radar (KLTX), 50 km from the middle of the area, began a volume at 20:35 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.

What was reported inside it

Time	Report	Where	Remark
Oct 11, 4:33 PM EDT	TORNADO	3 Nne Red Hill, SC	CONFIRMED EF0. FENCES BLOWN DOWN IN THE BRIDGEWATER COMMUNITY OFF OF HWY 90. TREES ALSO REPORTED DOWN IN ROAD IN THE RED HILL AREA. TIME ESTIMATED VIA RADAR.
Oct 11, 4:33 PM EDT	TORNADO	3 Nne Red Hill, SC	SOCIAL MEDIA REPORTS POSSIBLE TORNADO DAMAGE OF FENCES BLOWN DOWN IN THE BRIDGEWATER COMMUNITY OFF OF HWY 90. TREES ALSO REPORTED DOWN IN ROAD IN THE RED HILL AREA. TIME ESTIMATED VIA RADAR.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 8.5 hours before the alert went out and 144 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 228 J/kg
Mixed-layer CIN: -41 J/kg
Mixed-layer LCL: 753 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 86 m²/s²
0-3 km storm-relative helicity: 126 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

As transmitted.

733 
WFUS52 KILM 112032
TORILM
SCC051-112115-
/O.NEW.KILM.TO.W.0032.201011T2032Z-201011T2115Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Wilmington NC
432 PM EDT Sun Oct 11 2020

The National Weather Service in Wilmington has issued a

* Tornado Warning for...
  Central Horry County in northeastern South Carolina...

* Until 515 PM EDT.
    
* At 432 PM EDT, a severe thunderstorm capable of producing a tornado
  was located over Horry Georgetown Technical College Conway Campus,
  or near Conway, moving northeast at 15 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...Expect damage to mobile homes, roofs, and vehicles.

* This dangerous storm will be near...
  Hickory Grove around 440 PM EDT.
  Nixonville around 450 PM EDT.
  Hand around 505 PM EDT.
  Hammond around 510 PM EDT.

Other locations impacted by this tornadic thunderstorm include Conway
Medical Center and Lighthouse Care Center Of Conway.

This includes SC Highway 22 between mile markers 13 and 24.
 
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.

&&

LAT...LON 3378 7901 3384 7907 3399 7891 3386 7875
TIME...MOT...LOC 2032Z 237DEG 15KT 3383 7900 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

21

3 follow-up statements

300 
WWUS52 KILM 112042
SVSILM

Severe Weather Statement
National Weather Service Wilmington NC
442 PM EDT Sun Oct 11 2020

SCC051-112115-
/O.CON.KILM.TO.W.0032.000000T0000Z-201011T2115Z/
Horry SC-
442 PM EDT Sun Oct 11 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 515 PM EDT FOR CENTRAL
HORRY COUNTY...
    
At 442 PM EDT, a severe thunderstorm capable of producing a tornado
was located over Hickory Grove, or near Conway, moving northeast at
20 mph.

HAZARD...TORNADO.

SOURCE...Radar indicated rotation.

IMPACT...Expect damage to mobile homes, roofs, and vehicles.

This dangerous storm will be near...
  Hammond around 505 PM EDT.

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.

&&

LAT...LON 3381 7898 3387 7903 3399 7891 3389 7878
TIME...MOT...LOC 2042Z 226DEG 16KT 3386 7897 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

21

639 
WWUS52 KILM 112056
SVSILM

Severe Weather Statement
National Weather Service Wilmington NC
456 PM EDT Sun Oct 11 2020

SCC051-112115-
/O.CON.KILM.TO.W.0032.000000T0000Z-201011T2115Z/
Horry SC-
456 PM EDT Sun Oct 11 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 515 PM EDT FOR CENTRAL
HORRY COUNTY...
    
At 456 PM EDT, a severe thunderstorm capable of producing a tornado
was located near Hammond, or 9 miles northeast of Conway, moving
northeast at 15 mph.

HAZARD...TORNADO.

SOURCE...Radar indicated rotation.

IMPACT...Expect damage to mobile homes, roofs, and vehicles.

This dangerous storm will be near...
  Hammond around 510 PM EDT.

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.

&&

LAT...LON 3384 7892 3389 7896 3397 7888 3389 7878
TIME...MOT...LOC 2056Z 237DEG 15KT 3389 7891 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

21

828 
WWUS52 KILM 112107
SVSILM

Severe Weather Statement
National Weather Service Wilmington NC
507 PM EDT Sun Oct 11 2020

SCC051-112117-
/O.EXP.KILM.TO.W.0032.000000T0000Z-201011T2115Z/
Horry SC-
507 PM EDT Sun Oct 11 2020

...THE TORNADO WARNING FOR CENTRAL HORRY COUNTY WILL EXPIRE AT 515 PM
EDT...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.

LAT...LON 3384 7892 3389 7896 3397 7888 3389 7878
TIME...MOT...LOC 2107Z 237DEG 15KT 3391 7887 

$$

21

The office that day

Everything else NWS Wilmington, NC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 11, 1:31 PM EDT	Special Weather Statement	ILM	Darlington	29 min
Oct 11, 1:43 PM EDT	Special Weather Statement	ILM	Darlington	32 min
Oct 11, 1:59 PM EDT	Tornado Warning	ILM	Florence, Horry, Marion	12 min
Oct 11, 2:13 PM EDT	Special Weather Statement	ILM	Darlington	32 min
Oct 11, 2:25 PM EDT	Special Weather Statement	ILM	Marlboro	50 min
Oct 11, 2:31 PM EDT	Special Weather Statement	ILM	Marion	44 min
Oct 11, 2:43 PM EDT	Special Weather Statement	ILM	Dillon	47 min
Oct 11, 3:15 PM EDT	Tornado Warning	ILM	Dillon	30 min
Oct 11, 3:34 PM EDT	Areal Flood Advisory	ILM	Horry, Marion	116 min
Oct 11, 3:37 PM EDT	Tornado Warning	ILM	Horry	23 min
Oct 11, 3:46 PM EDT	Special Weather Statement	ILM	Dillon	44 min
Oct 11, 4:35 PM EDT	Areal Flood Advisory	ILM	Horry	85 min

Nearby

Tornado Warnings in South Carolina, 2020 Every tornado warning in 2020 Tornadoes 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.