Alert archive / South Carolina / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 29, NWS Charleston, SC

April 3, 20174 counties in South Carolina

NWS Charleston, SC issued this severe thunderstorm warning at Apr 3, 2017, 5:36 PM EDT for 4 counties in South Carolina. It was in force for 36 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
Apr 3, 2017, 5:36 PM EDT (21:36 UTC)
Expired
Apr 3, 2017, 6:12 PM EDT
In force
36 min
Issued by
NWS Charleston, SC
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Beaufort County, SC, Colleton County, SC, Hampton County, SC, Jasper County, SC

The radar

The Charleston,SC radar (KCLX), 47 km from the middle of the area, began a volume at 21:40 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.

IssuedProductOfficeLasted
Apr 3, 2:07 PM EDTTornado WatchSPC6 hr
Apr 3, 4:36 PM EDTSevere Thunderstorm WatchSPC4 hr

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 9.6 hours before the alert went out and 55 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-pSkew-T log-p diagram, Charleston AFB, SC at 12:00Z on 2017-04-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Charleston AFB, SC at 12:00Z on 2017-04-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 41 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1059 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
41 m²/s²
0-3 km storm-relative helicity
47 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

038 
WUUS52 KCHS 032136
SVRCHS
SCC013-029-049-053-032230-
/O.NEW.KCHS.SV.W.0029.170403T2136Z-170403T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Charleston SC
536 PM EDT MON APR 3 2017

The National Weather Service in Charleston has issued a

* Severe Thunderstorm Warning for portions of...
  Beaufort County in southeastern South Carolina...
  Hampton County in southeastern South Carolina...
  Colleton County in southeastern South Carolina...
  Jasper County in southeastern South Carolina...

* Until 630 PM EDT

* At 535 PM EDT, severe thunderstorms were located along a line
  extending from 7 miles south of Walterboro to 8 miles northeast of
  Ridgeland, moving east at 30 mph.

  HAZARD...60 mph wind gusts and quarter size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees. 

* Locations impacted include...
  Beaufort, Port Royal, Ridgeland, Yemassee, Clarendon,
  Coosawhatchie, Gardens Corner and Lemon Island.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

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

&&

A tornado watch remains in effect until 900 PM EDT for southeastern
South Carolina.

LAT...LON 3280 8042 3279 8043 3274 8045 3272 8043
      3271 8043 3271 8042 3260 8043 3234 8079
      3254 8100 3270 8083 3288 8041
TIME...MOT...LOC 2135Z 289DEG 27KT 3279 8069 3253 8084 

HAIL...1.00IN
WIND...60MPH
 
$$

NED
2 follow-up statements
988 
WWUS52 KCHS 032153
SVSCHS

Severe Weather Statement
National Weather Service Charleston SC
553 PM EDT MON APR 3 2017

SCC049-032202-
/O.CAN.KCHS.SV.W.0029.000000T0000Z-170403T2230Z/
Hampton SC-
553 PM EDT MON APR 3 2017

...THE SEVERE THUNDERSTORM WARNING FOR HAMPTON COUNTY IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore the warning has been cancelled.

A tornado watch remains in effect until 900 PM EDT for southeastern
South Carolina.

A severe thunderstorm watch remains in effect until 1000 PM EDT for
southeastern South Carolina.

LAT...LON 3280 8042 3279 8043 3274 8045 3271 8042
      3260 8043 3234 8079 3246 8091 3275 8071
      3288 8041
TIME...MOT...LOC 2152Z 253DEG 48KT 3275 8055 3257 8058 

$$

SCC013-029-053-032230-
/O.CON.KCHS.SV.W.0029.000000T0000Z-170403T2230Z/
Beaufort SC-Colleton SC-Jasper SC-
553 PM EDT MON APR 3 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM EDT
FOR BEAUFORT...COLLETON AND JASPER COUNTIES...

At 552 PM EDT, severe thunderstorms were located along a line
extending from 12 miles southeast of Walterboro to 11 miles northeast
of Beaufort, moving east at 55 mph.

HAZARD...60 mph wind gusts and nickel size hail. 

SOURCE...Radar indicated. 

IMPACT...Expect damage to roofs, siding, and trees. 

Locations impacted include...
Beaufort, Port Royal, Clarendon, Gardens Corner, Lemon Island,
Jacksonboro, Shell Point and Burton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

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

&&

A tornado watch remains in effect until 900 PM EDT for southeastern
South Carolina.

LAT...LON 3280 8042 3279 8043 3274 8045 3271 8042
      3260 8043 3234 8079 3246 8091 3275 8071
      3288 8041
TIME...MOT...LOC 2152Z 253DEG 48KT 3275 8055 3257 8058 

HAIL...0.88IN
WIND...60MPH
 
$$

NED
641 
WWUS52 KCHS 032212
SVSCHS

Severe Weather Statement
National Weather Service Charleston SC
612 PM EDT MON APR 3 2017

SCC013-029-053-032222-
/O.CAN.KCHS.SV.W.0029.000000T0000Z-170403T2230Z/
Beaufort SC-Colleton SC-Jasper SC-
612 PM EDT MON APR 3 2017

...THE SEVERE THUNDERSTORM WARNING FOR BEAUFORT...COLLETON AND JASPER
COUNTIES IS CANCELLED...
    
The storms which prompted the warning have moved out of the area.
Therefore the warning has been cancelled.

A tornado watch remains in effect until 900 PM EDT for southeastern
South Carolina.

A severe thunderstorm watch remains in effect until 1000 PM EDT for
southeastern South Carolina.

LAT...LON 3280 8042 3279 8043 3274 8045 3271 8042
      3260 8043 3234 8079 3246 8091 3275 8071
      3288 8041
TIME...MOT...LOC 2209Z 289DEG 27KT 3271 8040 3253 8043 

$$

NED

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 3, 3:36 AM EDTRip Current StatementCHS16 hr
Apr 3, 3:37 AM EDTLake Wind AdvisoryCHSBerkeley19 hr
Apr 3, 4:18 PM EDTSevere Thunderstorm WarningCHSAllendale31 min
Apr 3, 4:31 PM EDTSevere Thunderstorm WarningCHSAllendale, Hampton59 min
Apr 3, 4:41 PM EDTTornado WarningCHSHampton24 min
Apr 3, 4:56 PM EDTSevere Thunderstorm WarningCHSHampton, Jasper49 min
Apr 3, 4:59 PM EDTSevere Thunderstorm WarningCHSColleton61 min
Apr 3, 5:46 PM EDTSevere Thunderstorm WarningCHSDorchester33 min
Apr 3, 5:56 PM EDTSevere Thunderstorm WarningCHSCharleston, Dorchester31 min
Apr 3, 6:08 PM EDTSpecial Marine WarningCHS97 min
Apr 3, 6:10 PM EDTSevere Thunderstorm WarningCHSBerkeley, Charleston, Dorchester65 min
Apr 3, 6:15 PM EDTSpecial Weather StatementCHSCharleston30 min
Apr 3, 6:23 PM EDTSpecial Weather StatementCHSCharleston37 min
Apr 3, 6:29 PM EDTSpecial Marine WarningCHS91 min
Apr 3, 6:36 PM EDTSevere Thunderstorm WarningCHSBerkeley, Charleston, Dorchester54 min
Apr 3, 6:46 PM EDTSpecial Marine WarningCHS89 min
Apr 3, 7:06 PM EDTSpecial Marine WarningCHS84 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2017Every severe thunderstorm warning 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.