Alert archive / South Carolina / Tornado Warnings in 2017

Tornado Warning 4, NWS Charleston, SC

January 21, 2017Hampton County, Jasper County, South Carolina

NWS Charleston, SC issued this tornado warning at Jan 21, 2017, 3:16 PM EST for Hampton County, Jasper County, South Carolina. It was in force for 29 min. 4 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: Jan 21, 2017, 3:16 PM EST (20:16 UTC)
Expired: Jan 21, 2017, 3:45 PM EST
In force: 29 min
Issued by: NWS Charleston, SC
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Hampton County, SC, Jasper County, SC

The radar

The Charleston,SC radar (KCLX), 5 km from the middle of the area, began a volume at 20:19 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
Jan 21, 3:16 PM EST	TSTM WND DMG	1 S Scotia, SC	TREE REPORTED DOWN ON US-321 JUST SOUTH OF SCOTIA. TIME IS ESTIMATED BASED ON RADAR.
Jan 21, 3:20 PM EST	TSTM WND DMG	2 Ene Furman, SC	HAMPTON COUNTY EMERGENCY MANAGEMENT REPORTED SEVERAL TREES DOWN ALONG MCKENZIE TRAIL NEAR FURMAN.
Jan 21, 3:27 PM EST	TSTM WND DMG	5 Wnw Grays, SC	HAMPTON COUNTY EMERGENCY MANAGEMENT REPORTED SEVERAL TREES DOWN ON JOHN PENN ROAD NEAR CYPRESS CREEK ROAD. THERE WAS ALSO DAMAGE TO AN OLD HOME IN THIS AREA. POSSIBLE TORNADO.
Jan 21, 3:31 PM EST	TSTM WND DMG	2 Sse Grays, SC	TREE REPORTED DOWN ON GRAYS HWY. TIME ESTIMATED BASED ON RADAR.

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jan 21, 1:51 PM EST	Tornado Watch	SPC	4 hr

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 8.3 hours before the alert went out and 102 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: 138 J/kg
Mixed-layer CIN: -38 J/kg
Mixed-layer LCL: 581 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 22 m²/s²
0-3 km storm-relative helicity: 37 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

505 
WFUS52 KCHS 212016
TORCHS
SCC049-053-212045-
/O.NEW.KCHS.TO.W.0004.170121T2016Z-170121T2045Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Charleston SC
316 PM EST SAT JAN 21 2017

The National Weather Service in Charleston has issued a

* Tornado Warning for portions of...
  Hampton County in southeastern South Carolina...
  Jasper County in southeastern South Carolina...

* Until 345 PM EST
    
* At 316 PM EST, a severe thunderstorm capable of producing a tornado
  was located 13 miles southwest of Lake Warren State Park, moving
  east at 50 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...
  Yemassee, Varnville, Estill, Furman, Scotia, Lena, Grays and
  Garnett.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Report damage directly to the Charleston National Weather Service at
1-888-383-2024 when it is safe to do so.

&&

LAT...LON 3283 8090 3281 8090 3277 8086 3272 8085
      3271 8083 3271 8084 3255 8128 3256 8129
      3255 8129 3256 8130 3256 8132 3271 8141
      3290 8097
TIME...MOT...LOC 2016Z 247DEG 43KT 3267 8128 

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

$$

The office that day

Everything else NWS Charleston, SC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jan 21, 3:27 AM EST	Small Craft Advisory	CHS		3 days
Jan 21, 2:58 PM EST	Tornado Warning	CHS	Allendale	32 min
Jan 21, 3:06 PM EST	Severe Thunderstorm Warning	CHS	Allendale, Beaufort, Colleton, Hampton, Jasper	54 min
Jan 21, 3:38 PM EST	Severe Thunderstorm Warning	CHS	Beaufort, Jasper	67 min
Jan 21, 3:56 PM EST	Severe Thunderstorm Warning	CHS	Beaufort, Berkeley, Charleston, Colleton, Dorchester, Jasper	49 min
Jan 21, 4:22 PM EST	Special Marine Warning	CHS		83 min
Jan 21, 4:33 PM EST	Gale Watch	CHS		11 hr
Jan 21, 5:04 PM EST	Special Weather Statement	CHS	Berkeley	26 min
Jan 21, 5:17 PM EST	Special Marine Warning	CHS		58 min
Jan 21, 5:33 PM EST	Special Marine Warning	CHS		117 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.