Alert archive / South Carolina / Tornado Warnings in 2017

Tornado Warning 17, NWS Wilmington, NC

September 6, 2017Dillon County, Horry County, Marion County, South Carolina

NWS Wilmington, NC issued this tornado warning at Sep 6, 2017, 5:51 PM EDT for Dillon County, Horry County, Marion County, South Carolina. It was in force for 24 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 6, 2017, 5:51 PM EDT (21:51 UTC)
Expired: Sep 6, 2017, 6:15 PM EDT
In force: 24 min
Issued by: NWS Wilmington, NC
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Dillon County, SC, Horry County, SC, Marion County, SC

The radar

The Wilmington radar (KLTX), 76 km from the middle of the area, began a volume at 21:55 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 12:00Z, 9.9 hours before the alert went out and 159 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: 983 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 738 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 64 m²/s²
0-3 km storm-relative helicity: 127 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 2.6

Open this sounding in Storm Lab

The text

As transmitted.

328 
WFUS52 KILM 062151
TORILM
SCC033-051-067-062215-
/O.NEW.KILM.TO.W.0017.170906T2151Z-170906T2215Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Wilmington NC
551 PM EDT WED SEP 6 2017

The National Weather Service in Wilmington has issued a

* Tornado Warning for...
  Southeastern Dillon County in northeastern South Carolina...
  Northwestern Horry County in northeastern South Carolina...
  Northern Marion County in northeastern South Carolina...

* Until 615 PM EDT
    
* At 551 PM EDT, a severe thunderstorm capable of producing a tornado
  was located over Marion, moving east at 35 mph.

  HAZARD...Tornado. 

  SOURCE...Radar indicated rotation. 

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

* Locations impacted include...
  Marion, Mullins, Fork, Zion, Smithboro, Gapway, Nichols and
  Carolinas Hospital System - Marion.

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 3412 7898 3410 7944 3419 7949 3433 7921
TIME...MOT...LOC 2151Z 250DEG 30KT 3416 7940 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

JDW

2 follow-up statements

243 
WWUS52 KILM 062202
SVSILM

Severe Weather Statement
National Weather Service Wilmington NC
602 PM EDT WED SEP 6 2017

SCC033-062212-
/O.CAN.KILM.TO.W.0017.000000T0000Z-170906T2215Z/
Dillon SC-
602 PM EDT WED SEP 6 2017

...THE TORNADO WARNING FOR SOUTHEASTERN DILLON COUNTY IS CANCELLED...
    
The tornadic thunderstorm which prompted the warning has moved out 
of the warned area. Therefore, the warning has been cancelled.

LAT...LON 3425 7913 3412 7898 3411 7933 3421 7935
      3427 7928 3425 7924 3426 7921 3429 7917
TIME...MOT...LOC 2202Z 250DEG 30KT 3419 7929 

$$

SCC051-067-062215-
/O.CON.KILM.TO.W.0017.000000T0000Z-170906T2215Z/
Horry SC-Marion SC-
602 PM EDT WED SEP 6 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 615 PM EDT FOR
NORTHWESTERN HORRY AND NORTHEASTERN MARION COUNTIES...
    
At 602 PM EDT, a severe thunderstorm capable of producing a tornado
was located over Mullins, moving east at 35 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. 

Locations impacted include...
Mullins, Gapway, Nichols and Carolinas Hospital System - Marion. 

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 3425 7913 3412 7898 3411 7933 3421 7935
      3427 7928 3425 7924 3426 7921 3429 7917
TIME...MOT...LOC 2202Z 250DEG 30KT 3419 7929 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

JDW

308 
WWUS52 KILM 062207
SVSILM

Severe Weather Statement
National Weather Service Wilmington NC
607 PM EDT WED SEP 6 2017

SCC051-067-062217-
/O.EXP.KILM.TO.W.0017.000000T0000Z-170906T2215Z/
Horry SC-Marion SC-
607 PM EDT WED SEP 6 2017

...THE TORNADO WARNING FOR NORTHWESTERN HORRY AND NORTHEASTERN MARION
COUNTIES WILL EXPIRE AT 615 PM 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.

LAT...LON 3425 7913 3412 7898 3411 7933 3421 7935
      3427 7928 3425 7924 3426 7921 3429 7917
TIME...MOT...LOC 2207Z 250DEG 30KT 3420 7926 

$$

JDW

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 5, 9:13 PM EDT	Special Weather Statement	ILM	Marlboro	62 min
Sep 5, 10:47 PM EDT	Special Weather Statement	ILM	Darlington, Marlboro	43 min
Sep 5, 11:59 PM EDT	Special Weather Statement	ILM	Dillon	31 min
Sep 6, 1:19 AM EDT	Special Weather Statement	ILM	Williamsburg	26 min
Sep 6, 4:08 AM EDT	Special Weather Statement	ILM	Horry	37 min
Sep 6, 4:37 AM EDT	Special Marine Warning	ILM		38 min
Sep 6, 12:55 PM EDT	Special Marine Warning	ILM		65 min
Sep 6, 1:51 PM EDT	Special Marine Warning	ILM		54 min
Sep 6, 2:53 PM EDT	Special Weather Statement	ILM	Williamsburg	52 min
Sep 6, 2:57 PM EDT	Special Weather Statement	ILM	Dillon	63 min
Sep 6, 3:55 PM EDT	Special Weather Statement	ILM	Marion	65 min
Sep 6, 4:39 PM EDT	Special Weather Statement	ILM	Horry	51 min
Sep 6, 4:48 PM EDT	Special Weather Statement	ILM	Florence	42 min
Sep 6, 4:56 PM EDT	Severe Thunderstorm Warning	ILM	Florence	42 min
Sep 6, 5:36 PM EDT	Special Weather Statement	ILM	Horry	39 min
Sep 6, 5:38 PM EDT	Special Weather Statement	ILM	Dillon, Marion	52 min
Sep 6, 5:46 PM EDT	Special Weather Statement	ILM	Williamsburg	44 min
Sep 6, 5:57 PM EDT	Severe Thunderstorm Warning	ILM	Horry	31 min
Sep 6, 5:59 PM EDT	Special Marine Warning	ILM		46 min

Nearby

Tornado Warnings in South Carolina, 2017 Every tornado warning in 2017 Tornadoes in 2017

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.