Alert archive / South Carolina / Tornado Warnings in 2018

Tornado Warning 4, NWS Charleston, SC

October 10, 2018Chatham County, Georgia; Beaufort County, Jasper County, South Carolina

NWS Charleston, SC issued this tornado warning at Oct 10, 2018, 10:50 PM EDT for Chatham County, Georgia; Beaufort County, Jasper County, South Carolina. It was in force for 25 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, 10:50 PM EDT (02:50 UTC)
Expired: Oct 10, 2018, 11:15 PM EDT
In force: 25 min
Issued by: NWS Charleston, SC
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.0 in

Counties Chatham County, GA, Beaufort County, SC, Jasper County, SC

The radar

The Charleston,SC radar (KCLX), 65 km from the middle of the area, began a volume at 02:52 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
Oct 10, 2:44 PM EDT	Tornado Watch	SPC	11 hr

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 00:00Z, 2.8 hours before the alert went out and 125 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.

584 
WFUS52 KCHS 110250
TORCHS
GAC051-SCC013-053-110315-
/O.NEW.KCHS.TO.W.0004.181011T0250Z-181011T0315Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Charleston SC
1050 PM EDT WED OCT 10 2018

The National Weather Service in Charleston has issued a

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

* Until 1115 PM EDT.
    
* At 1049 PM EDT, a severe thunderstorm capable of producing a
  tornado was located over Fort Pulaski National Monument, moving
  north at 45 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, Wilmington Island, Fort Pulaski
  National Monument, Bellinger Hill Area, Tybee Island, Hardeeville
  and Pritchardville.

This warning includes I-95 in South Carolina between mile markers 6
and 7.
 
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 3203 8103 3205 8102 3205 8103 3229 8109
      3233 8075 3212 8074 3207 8083 3205 8084
      3201 8081 3197 8083 3193 8099
TIME...MOT...LOC 0249Z 178DEG 39KT 3199 8092 

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

$$

1 follow-up statement

755 
WWUS52 KCHS 110259
SVSCHS

Severe Weather Statement
National Weather Service Charleston SC
1059 PM EDT WED OCT 10 2018

GAC051-110308-
/O.CAN.KCHS.TO.W.0004.000000T0000Z-181011T0315Z/
Chatham GA-
1059 PM EDT WED OCT 10 2018

...THE TORNADO WARNING FOR CHATHAM COUNTY IS CANCELLED...
    
The immediate risk for tornadoes has ended. 

LAT...LON 3206 8091 3205 8091 3206 8092 3211 8102
      3229 8109 3233 8075 3212 8074 3209 8080
      3207 8083 3205 8085
TIME...MOT...LOC 0258Z 179DEG 37KT 3215 8096 

$$

SCC013-053-110315-
/O.CON.KCHS.TO.W.0004.000000T0000Z-181011T0315Z/
Beaufort SC-Jasper SC-
1059 PM EDT WED OCT 10 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1115 PM EDT FOR BEAUFORT
AND JASPER COUNTIES...
    
At 1058 PM EDT, a severe thunderstorm capable of producing a tornado
was located over Bellinger Hill Area, moving north at 45 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, Bellinger Hill Area, Hardeeville,
Pritchardville, Forest Beach, Rose Hill and Sun City.

This warning includes I-95 in South Carolina between mile markers 6
and 7.
 
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.

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

&&

LAT...LON 3206 8091 3205 8091 3206 8092 3211 8102
      3229 8109 3233 8075 3212 8074 3209 8080
      3207 8083 3205 8085
TIME...MOT...LOC 0258Z 179DEG 37KT 3215 8096 

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 11, 3:45 AM EDT	Rip Current Statement	CHS		16 hr
Oct 11, 10:50 AM EDT	Wind Advisory	CHS	Bulloch, Effingham, Screven	8 hr
Oct 10, 10:41 PM EDT	Special Marine Warning	CHS		34 min
Oct 10, 11:14 PM EDT	Special Marine Warning	CHS		61 min
Oct 10, 11:15 PM EDT	Tornado Warning	CHS	Beaufort, Jasper	30 min
Oct 11, 12:08 AM EDT	Special Marine Warning	CHS		19 min
Oct 11, 10:31 AM EDT	River Flood Warning	CHS	Berkeley, Georgetown, Williamsburg	11 days
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 Tornado Warnings in Georgia, 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.