Alert archive / South Carolina / Tornado Warnings in 2021

Tornado Warning 5, NWS Charleston, SC

July 7, 2021Beaufort County, Jasper County, South Carolina

NWS Charleston, SC issued this tornado warning at Jul 7, 2021, 11:39 PM EDT for Beaufort County, Jasper County, South Carolina. It was in force for 36 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: Jul 7, 2021, 11:39 PM EDT (03:39 UTC)
Expired: Jul 8, 2021, 12:15 AM EDT
In force: 36 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), 48 km from the middle of the area, began a volume at 03:42 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
Jul 7, 11:44 PM EDT	TORNADO	2 Sse Parris Island, SC	A NATIONAL WEATHER SERVICE STORM SURVEY CONFIRMED TORNADO DAMAGE ON PARRIS ISLAND, SC. TIME ESTIMATED FROM RADAR DATA.
Jul 7, 11:50 PM EDT	TORNADO	Port Royal, SC	A NATIONAL WEATHER SERVICE STORM SURVEY CONFIRMED TORNADO DAMAGE IN PORT ROYAL, SC. THE TIME WAS ESTIMATED FROM RADAR DATA.
Jul 7, 11:51 PM EDT	TSTM WND DMG	Port Royal, SC	MILTIPLE TREES DOWN, TREES ON HOUSES, POWER LINES DOWN, AND POWER OUTAGES. DAMAGE EXTENDED ACROSS THE RIVER INTO BURTON. POSSIBLE TORNADO.
Jul 7, 11:51 PM EDT	TSTM WND DMG	Port Royal, SC	MULTIPLE TREES DOWN, TREES ON HOUSES, POWER LINES DOWN, AND POWER OUTAGES. DAMAGE EXTENDED ACROSS THE RIVER INTO BURTON. POSSIBLE TORNADO.

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
Jul 7, 7:25 PM EDT	Tornado Watch	SPC	11 hr

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 00:00Z, 3.7 hours before the alert went out and 94 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: 1185 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 801 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: 41 m²/s²
0-3 km storm-relative helicity: 63 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

941 
WFUS52 KCHS 080339
TORCHS
SCC013-053-080415-
/O.NEW.KCHS.TO.W.0005.210708T0339Z-210708T0415Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Charleston SC
1139 PM EDT Wed Jul 7 2021

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 1215 AM EDT.
    
* At 1139 PM EDT, a severe thunderstorm capable of producing a
  tornado was located over Hilton Head Airport, moving northwest 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...
  Hilton Head Island, Beaufort, Port Royal, Shell Point, Burton,
  Calawassie Island, Laurel Bay, Hilton Head Airport, Lemon Island,
  Beaufort Marine Corps Air Station, Parris Island and Folly Field.

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 3236 8091 3254 8069 3225 8055 3224 8059
      3215 8068
TIME...MOT...LOC 0339Z 151DEG 31KT 3224 8065 

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

$$

SPR

2 follow-up statements

558 
WWUS52 KCHS 080350
SVSCHS

Severe Weather Statement
National Weather Service Charleston SC
1150 PM EDT Wed Jul 7 2021

SCC013-053-080415-
/O.CON.KCHS.TO.W.0005.000000T0000Z-210708T0415Z/
Beaufort SC-Jasper SC-
1150 PM EDT Wed Jul 7 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1215 AM EDT FOR BEAUFORT
AND JASPER COUNTIES...
    
At 1150 PM EDT, a severe thunderstorm capable of producing a tornado
was located over Parris Island, moving northwest at 40 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, Beaufort, Port Royal, Shell Point, Burton,
Calawassie Island, Laurel Bay, Hilton Head Airport, Lemon Island,
Beaufort Marine Corps Air Station, Parris Island and Folly Field.

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 3236 8091 3254 8069 3225 8055 3224 8059
      3215 8068
TIME...MOT...LOC 0350Z 156DEG 35KT 3236 8070 

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

$$

SPR

670 
WWUS52 KCHS 080405
SVSCHS

Severe Weather Statement
National Weather Service Charleston SC
1205 AM EDT Thu Jul 8 2021

SCC013-053-080415-
/O.EXP.KCHS.TO.W.0005.000000T0000Z-210708T0415Z/
Beaufort SC-Jasper SC-
1205 AM EDT Thu Jul 8 2021

...THE TORNADO WARNING FOR PORTIONS OF BEAUFORT AND JASPER COUNTIES
WILL EXPIRE AT 1215 AM 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 3236 8091 3254 8069 3225 8055 3224 8059
      3215 8068
TIME...MOT...LOC 0405Z 151DEG 31KT 3246 8077 

$$

SPR

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 7, 9:03 PM EDT	Special Marine Warning	CHS		117 min
Jul 7, 9:23 PM EDT	Areal Flood Advisory	CHS	Jasper	82 min
Jul 7, 10:39 PM EDT	Areal Flood Advisory	CHS	Beaufort, Jasper	81 min
Jul 7, 10:46 PM EDT	Special Marine Warning	CHS		89 min
Jul 7, 10:58 PM EDT	Special Marine Warning	CHS		32 min
Jul 7, 11:23 PM EDT	Severe Thunderstorm Warning	CHS	Beaufort, Colleton, Jasper	67 min
Jul 7, 11:48 PM EDT	Special Marine Warning	CHS		87 min
Jul 8, 12:10 AM EDT	Areal Flood Advisory	CHS	Beaufort, Charleston, Colleton, Hampton, Jasper	3 hr
Jul 8, 12:23 AM EDT	Tornado Warning	CHS	Beaufort, Colleton	37 min
Jul 8, 12:49 AM EDT	Special Marine Warning	CHS		56 min
Jul 8, 12:57 AM EDT	Special Marine Warning	CHS		93 min
Jul 8, 12:59 AM EDT	Tornado Warning	CHS	Charleston	31 min
Jul 8, 1:08 AM EDT	Areal Flood Advisory	CHS	Berkeley, Charleston	5 hr
Jul 8, 1:36 AM EDT	Tornado Warning	CHS	Charleston	24 min
Jul 8, 1:50 AM EDT	Areal Flood Advisory	CHS	Berkeley, Charleston, Colleton, Dorchester	115 min
Jul 8, 1:54 AM EDT	Special Marine Warning	CHS		2 hr
Jul 8, 2:13 AM EDT	Special Weather Statement	CHS	Colleton	32 min
Jul 8, 2:21 AM EDT	Special Marine Warning	CHS		114 min
Jul 8, 2:23 AM EDT	Tornado Warning	CHS	Charleston	37 min
Jul 8, 2:30 AM EDT	Special Marine Warning	CHS		78 min
Jul 8, 2:49 AM EDT	Tornado Warning	CHS	Berkeley, Charleston	26 min
Jul 8, 3:08 AM EDT	Tornado Warning	CHS	Berkeley	39 min
Jul 8, 3:16 AM EDT	Tornado Warning	CHS	Berkeley, Charleston	14 min
Jul 8, 3:36 AM EDT	Special Weather Statement	CHS	Dorchester	24 min
Jul 8, 3:58 AM EDT	Special Weather Statement	CHS	Dorchester	32 min
Jul 8, 4:05 AM EDT	Special Marine Warning	CHS		85 min
Jul 8, 4:16 AM EDT	Tornado Warning	CHS	Berkeley, Charleston	44 min
Jul 8, 8:05 AM EDT	Small Craft Advisory	CHS		14 hr

Nearby

Tornado Warnings in South Carolina, 2021 Every tornado warning in 2021 Tornadoes in 2021

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.