Alert archive / South Carolina / Tornado Warnings in 2018

Tornado Warning 5, NWS Charleston, SC

October 10, 2018Beaufort County, Jasper County, South Carolina

NWS Charleston, SC issued this tornado warning at Oct 10, 2018, 11:15 PM EDT for Beaufort County, Jasper County, South Carolina. It was in force for 30 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: Oct 10, 2018, 11:15 PM EDT (03:15 UTC)
Expired: Oct 10, 2018, 11:45 PM EDT
In force: 30 min
Issued by: NWS Charleston, SC
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.0 in

Counties Beaufort County, SC, Jasper County, SC

The radar

The Charleston,SC radar (KCLX), 45 km from the middle of the area, began a volume at 03:19 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.

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 00:00Z, 3.3 hours before the alert went out and 95 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: 846 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 746 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 87 m²/s²
0-3 km storm-relative helicity: 137 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 3.6

Open this sounding in Storm Lab

The text

As transmitted.

391 
WFUS52 KCHS 110315
TORCHS
SCC013-053-110345-
/O.NEW.KCHS.TO.W.0005.181011T0315Z-181011T0345Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Charleston SC
1115 PM EDT WED OCT 10 2018

The National Weather Service in Charleston has issued a

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

* Until 1145 PM EDT.
    
* At 1114 PM EDT, a severe thunderstorm capable of producing a
  tornado was located over Hilton Head Island, moving north 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...
  Hilton Head Island, Bluffton, Beaufort, Port Royal, Clarendon,
  Coosawhatchie, Gardens Corner and Lemon Island.

This warning includes I-95 in South Carolina between mile markers 27
and 32.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

Tornadoes from tropical storms or hurricanes can form and move very
quickly. TAKE COVER IMMEDIATELY! If you wait until you hear a tornado
it could be too late. Take action now to immediately protect
yourself.

&&

LAT...LON 3208 8087 3261 8096 3262 8066 3260 8065
      3259 8063 3217 8066 3212 8072 3208 8081
TIME...MOT...LOC 0314Z 176DEG 44KT 3217 8077 

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

$$

1 follow-up statement

634 
WWUS52 KCHS 110329
SVSCHS

Severe Weather Statement
National Weather Service Charleston SC
1129 PM EDT WED OCT 10 2018

SCC013-053-110345-
/O.CON.KCHS.TO.W.0005.000000T0000Z-181011T0345Z/
Beaufort SC-Jasper SC-
1129 PM EDT WED OCT 10 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1145 PM EDT FOR BEAUFORT
AND JASPER COUNTIES...
    
At 1128 PM EDT, a severe thunderstorm capable of producing a tornado
was located near Port Royal, moving north at 50 mph. Another shower 
with rotation was moving onshore over far southern Hilton Head 
Island.

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...
Hilton Head Island, Bluffton, Beaufort, Port Royal, Clarendon,
Gardens Corner, Lemon Island and Rose Hill.

This warning includes I-95 in South Carolina near mile marker 32.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

Tornadoes from tropical storms or hurricanes can form and move very
quickly. TAKE COVER IMMEDIATELY! If you wait until you hear a tornado
it could be too late. Take action now to immediately protect
yourself.

&&

LAT...LON 3208 8087 3261 8091 3262 8066 3260 8065
      3259 8063 3217 8066 3212 8072 3208 8081
TIME...MOT...LOC 0328Z 180DEG 42KT 3231 8078 

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
Oct 10, 10:41 PM EDT	Special Marine Warning	CHS		34 min
Oct 10, 10:50 PM EDT	Tornado Warning	CHS	Beaufort, Jasper	25 min
Oct 10, 11:14 PM EDT	Special Marine Warning	CHS		61 min
Oct 11, 12:08 AM EDT	Special Marine Warning	CHS		19 min
Oct 11, 3:45 AM EDT	Rip Current Statement	CHS		16 hr
Oct 11, 10:31 AM EDT	River Flood Warning	CHS	Berkeley, Georgetown, Williamsburg	11 days
Oct 11, 10:50 AM EDT	Wind Advisory	CHS		8 hr
Oct 11, 1:39 PM EDT	Small Craft Advisory	CHS		13 hr
Oct 11, 4:52 PM EDT	Lake Wind Advisory	CHS	Berkeley	3 hr

Nearby

Tornado Warnings in South Carolina, 2018 Every tornado warning in 2018 Tornadoes in 2018

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.