Alert archive / South Carolina / Tornado Warnings in 2017

Tornado Warning 6, NWS Wilmington, NC

May 4, 2017Florence County, Marion County, South Carolina

NWS Wilmington, NC issued this tornado warning at May 4, 2017, 10:36 PM EDT for Florence County, Marion County, South Carolina. It was in force for 39 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: May 4, 2017, 10:36 PM EDT (02:36 UTC)
Expired: May 4, 2017, 11:15 PM EDT
In force: 39 min
Issued by: NWS Wilmington, NC
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.0 in

Counties Florence County, SC, Marion County, SC

The radar

The Wilmington radar (KLTX), 86 km from the middle of the area, began a volume at 02:38 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
May 4, 8:49 PM EDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 00:00Z, 2.6 hours before the alert went out and 138 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: 401 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 781 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 278 m²/s²
0-3 km storm-relative helicity: 329 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 8.3

Open this sounding in Storm Lab

The text

As transmitted.

092 
WFUS52 KILM 050236
TORILM
SCC041-067-050315-
/O.NEW.KILM.TO.W.0006.170505T0236Z-170505T0315Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Wilmington NC
1036 PM EDT THU MAY 4 2017

The National Weather Service in Wilmington has issued a

* Tornado Warning for...
  Southeastern Florence County in northeastern South Carolina...
  Marion County in northeastern South Carolina...

* Until 1115 PM EDT
    
* At 1036 PM EDT, a severe thunderstorm capable of producing a
  tornado was located over Kingsburg, or 14 miles east of Lake City,
  moving north at 30 mph.

  HAZARD...Tornado. 

  SOURCE...Radar indicated rotation. 

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

* Locations impacted include...
  Marion, Mullins, Johnsonville, Zion, Hannah, Gapway, Poston, Rains,
  Gresham, Smithboro, Kingsburg, Brittons Neck 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 3430 7942 3424 7916 3404 7927 3403 7930
      3401 7931 3399 7933 3397 7934 3395 7932
      3380 7941 3378 7949 3383 7963
TIME...MOT...LOC 0236Z 201DEG 26KT 3387 7950 

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

$$

DCH

2 follow-up statements

883 
WWUS52 KILM 050252
SVSILM

Severe Weather Statement
National Weather Service Wilmington NC
1052 PM EDT THU MAY 4 2017

SCC041-067-050315-
/O.CON.KILM.TO.W.0006.000000T0000Z-170505T0315Z/
Florence SC-Marion SC-
1052 PM EDT THU MAY 4 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1115 PM EDT FOR
SOUTHEASTERN FLORENCE AND MARION COUNTIES...
    
At 1051 PM EDT, a severe thunderstorm capable of producing a tornado
was located near Gresham, or 14 miles south of Marion, moving north
at 30 mph.

HAZARD...TORNADO. 

SOURCE...Radar indicated rotation. 

IMPACT...Expect downed trees and possible damage to mobile homes, 
         roofs, and vehicles that lie in it's path. 

Locations impacted include...
Marion, Mullins, Johnsonville, Zion, Hannah, Gapway, Poston, Rains,
Gresham, Smithboro, Kingsburg, Brittons Neck 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.

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 3430 7942 3424 7916 3404 7927 3403 7930
      3401 7931 3399 7933 3397 7934 3395 7932
      3380 7941 3378 7949 3383 7963
TIME...MOT...LOC 0251Z 201DEG 26KT 3397 7945 

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

$$

DCH

416 
WWUS52 KILM 050313
SVSILM

Severe Weather Statement
National Weather Service Wilmington NC
1113 PM EDT THU MAY 4 2017

SCC041-067-050322-
/O.EXP.KILM.TO.W.0006.000000T0000Z-170505T0315Z/
Florence SC-Marion SC-
1113 PM EDT THU MAY 4 2017

...THE TORNADO WARNING FOR SOUTHEASTERN FLORENCE AND MARION COUNTIES
WILL EXPIRE AT 1115 PM EDT...
    
The tornadic thunderstorm which prompted the warning has weakened. 
Therefore, the warning will be allowed to expire.

A tornado watch remains in effect until 300 AM EDT for northeastern
South Carolina.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Wilmington.

LAT...LON 3430 7942 3424 7916 3404 7927 3403 7930
      3401 7931 3399 7933 3397 7934 3395 7932
      3380 7941 3378 7949 3383 7963
TIME...MOT...LOC 0312Z 201DEG 26KT 3410 7939 

$$

DCH

The office that day

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

Issued	Product	Office	Counties	Lasted
May 4, 9:30 PM EDT	Special Weather Statement	ILM	Darlington	60 min
May 4, 10:31 PM EDT	Special Weather Statement	ILM	Marion	59 min
May 4, 11:09 PM EDT	Special Weather Statement	ILM	Horry	51 min
May 4, 11:41 PM EDT	Tornado Warning	ILM	Horry	34 min
May 5, 1:27 AM EDT	Special Marine Warning	ILM		63 min
May 5, 2:51 AM EDT	Areal Flood Advisory	ILM	Darlington, Marlboro	114 min
May 5, 3:27 AM EDT	Special Weather Statement	ILM	Marion	33 min
May 5, 3:29 AM EDT	Special Marine Warning	ILM		46 min
May 5, 3:50 AM EDT	Special Marine Warning	ILM		25 min
May 5, 4:00 AM EDT	Special Weather Statement	ILM	Marion	30 min
May 5, 4:04 AM EDT	Severe Thunderstorm Warning	ILM	Dillon, Horry, Marion	26 min
May 5, 4:24 AM EDT	Special Marine Warning	ILM		36 min
May 5, 5:25 AM EDT	Beach Hazards Statement	ILM	Georgetown, Horry	15 hr
May 5, 6:22 AM EDT	Small Craft Advisory	ILM		51 hr
May 5, 6:45 AM EDT	Special Marine Warning	ILM		30 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.