Alert archive / South Carolina / Tornado Warnings in 2017
Tornado Warning 20, NWS Charleston, SC
NWS Charleston, SC issued this tornado warning at May 4, 2017, 8:24 PM EDT for Colleton County, Dorchester County, South Carolina. It was in force for 37 min. 3 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
- May 4, 2017, 8:24 PM EDT (00:24 UTC)
- Expired
- May 4, 2017, 9:01 PM EDT
- In force
- 37 min
- Issued by
- NWS Charleston, SC
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.0 in
Counties Colleton County, SC, Dorchester County, SC
The radar
The Charleston,SC radar (KCLX), 84 km from the middle of the area, began a volume at 00:28 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 |
|---|---|---|---|
| May 4, 8:25 PM EDT | TORNADO | 2 E Canadys, SC | NWS SURVEY TEAM CONFIRMED AN EF-1 TORNADO OCCURRED NEAR CANADYS SC. MAXIMUM SUSTAINED WINDS ESTIMATED TO BE 100 MPH. MAXIMUM PATH WIDTH 150 YARDS. PATH LENGTH 2.02 MILES. |
| May 4, 8:32 PM EDT | TSTM WND DMG | 4 Nne Canadys, SC | TREE DOWN ON CAR REPORTED IN GROVER. POSSIBLE TORNADO. |
| May 4, 8:52 PM EDT | TSTM WND DMG | 3 Nnw Harleyville, SC | SOUTH CAROLINA HIGHWAY PATROL REPORTS A TREE DOWN NEAR MILE MARKER 175 ALONG I-26 WESTBOUND. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Charleston AFB, SC (KCHS), launched 00:00Z, 0.4 hours before the alert went out and 60 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.
- Mixed-layer CAPE
- 401 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 781 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 278 m²/s²
- 0-3 km storm-relative helicity
- 329 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 8.3
The text
As transmitted.
275
WFUS52 KCHS 050024
TORCHS
SCC029-035-050115-
/O.NEW.KCHS.TO.W.0020.170505T0024Z-170505T0115Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Charleston SC
824 PM EDT THU MAY 4 2017
The National Weather Service in Charleston has issued a
* Tornado Warning for portions of...
Colleton County in southeastern South Carolina...
Dorchester County in southeastern South Carolina...
* Until 915 PM EDT
* At 824 PM EDT, a severe thunderstorm capable of producing a tornado
was located 9 miles south of Saint George, moving northeast 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...
Saint George, Indian Field, St. George and Harleyville.
This warning includes...
I-26 between mile markers 171 and 181.
I-95 in South Carolina between mile markers 69 and 85.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!
Report damage directly to the Charleston National Weather Service at
1-888-383-2024 when it is safe to do so.
&&
LAT...LON 3333 8050 3330 8050 3327 8047 3327 8045
3326 8043 3327 8039 3325 8035 3302 8054
3308 8067 3329 8058 3332 8051
TIME...MOT...LOC 0024Z 214DEG 30KT 3305 8060
TORNADO...RADAR INDICATED
HAIL...0.00IN
$$
JRL4 follow-up statements
173
WWUS52 KCHS 050035
SVSCHS
Severe Weather Statement
National Weather Service Charleston SC
835 PM EDT THU MAY 4 2017
SCC029-050043-
/O.CAN.KCHS.TO.W.0020.000000T0000Z-170505T0115Z/
Colleton SC-
835 PM EDT THU MAY 4 2017
...THE TORNADO WARNING FOR COLLETON COUNTY IS CANCELLED...
The tornadic thunderstorm which prompted the warning has moved out
of the warned area therefore the warning has been cancelled.
LAT...LON 3333 8050 3330 8050 3327 8047 3327 8045
3326 8043 3327 8039 3325 8035 3307 8050
3310 8066 3329 8058 3332 8051
TIME...MOT...LOC 0033Z 214DEG 30KT 3312 8055
$$
SCC035-050115-
/O.CON.KCHS.TO.W.0020.000000T0000Z-170505T0115Z/
Dorchester SC-
835 PM EDT THU MAY 4 2017
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 915 PM EDT FOR
DORCHESTER COUNTY...
At 833 PM EDT, a severe thunderstorm capable of producing a tornado
was located 4 miles south of Saint George, moving northeast 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...
Saint George, Indian Field, St. George and Harleyville.
This warning includes...
I-26 between mile markers 171 and 181.
I-95 in South Carolina between mile markers 71 and 85.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
This storm has a history of producing wind damage!
Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!
Report damage directly to the Charleston National Weather Service at
1-888-383-2024 when it is safe to do so.
&&
LAT...LON 3333 8050 3330 8050 3327 8047 3327 8045
3326 8043 3327 8039 3325 8035 3307 8050
3310 8066 3329 8058 3332 8051
TIME...MOT...LOC 0033Z 214DEG 30KT 3312 8055
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
JRL436
WWUS52 KCHS 050041
SVSCHS
Severe Weather Statement
National Weather Service Charleston SC
841 PM EDT THU MAY 4 2017
SCC035-050115-
/O.CON.KCHS.TO.W.0020.000000T0000Z-170505T0115Z/
Dorchester SC-
841 PM EDT THU MAY 4 2017
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 915 PM EDT FOR
DORCHESTER COUNTY...
At 841 PM EDT, a severe thunderstorm capable of producing a tornado
was located near Indian Field, moving northeast at 35 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
Locations impacted include...
Saint George, Indian Field, St. George and Harleyville.
This warning includes...
I-26 between mile markers 171 and 181.
I-95 in South Carolina between mile markers 79 and 85.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!
Report damage directly to the Charleston National Weather Service at
1-888-383-2024 when it is safe to do so.
&&
LAT...LON 3333 8050 3330 8050 3327 8047 3327 8045
3326 8043 3327 8039 3325 8035 3314 8045
3317 8061 3329 8058 3332 8051
TIME...MOT...LOC 0041Z 214DEG 31KT 3319 8049
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
JRL224
WWUS52 KCHS 050053
SVSCHS
Severe Weather Statement
National Weather Service Charleston SC
853 PM EDT THU MAY 4 2017
SCC035-050115-
/O.CON.KCHS.TO.W.0020.000000T0000Z-170505T0115Z/
Dorchester SC-
853 PM EDT THU MAY 4 2017
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 915 PM EDT FOR
DORCHESTER COUNTY...
At 852 PM EDT, a severe thunderstorm capable of producing a tornado
was located 2 miles northwest of Harleyville, moving north 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...
Areas between Rosinville and Giant.
This warning includes I-26 between mile markers 172 and 178.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!
Report damage directly to the Charleston National Weather Service at
1-888-383-2024 when it is safe to do so.
&&
LAT...LON 3333 8050 3330 8050 3327 8047 3327 8045
3326 8043 3327 8039 3325 8040 3322 8044
3323 8054 3327 8054 3332 8051
TIME...MOT...LOC 0052Z 197DEG 30KT 3324 8047
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
JRL363
WWUS52 KCHS 050101
SVSCHS
Severe Weather Statement
National Weather Service Charleston SC
901 PM EDT THU MAY 4 2017
SCC035-050111-
/O.CAN.KCHS.TO.W.0020.000000T0000Z-170505T0115Z/
Dorchester SC-
901 PM EDT THU MAY 4 2017
...THE TORNADO WARNING FOR DORCHESTER COUNTY IS CANCELLED...
The storm which prompted the warning has moved out of the area.
Therefore the warning has been cancelled.
LAT...LON 3333 8050 3330 8050 3327 8047 3327 8045
3326 8043 3327 8039 3325 8040 3322 8044
3323 8054 3327 8054 3332 8051
TIME...MOT...LOC 0100Z 214DEG 30KT 3330 8042
$$
JRLThe office that day
Everything else NWS Charleston, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 4, 8:13 PM EDT | Tornado Warning | CHS | Colleton | 19 min |
| May 4, 8:15 PM EDT | Special Marine Warning | CHS | 90 min | |
| May 4, 9:49 PM EDT | Special Weather Statement | CHS | Berkeley | 26 min |
| May 5, 12:29 AM EDT | Special Weather Statement | CHS | Colleton | 31 min |
| May 5, 1:04 AM EDT | Special Weather Statement | CHS | Colleton, Dorchester | 41 min |
| May 5, 2:27 AM EDT | Special Weather Statement | CHS | Berkeley | 48 min |
| May 5, 2:37 AM EDT | Special Marine Warning | CHS | 23 min | |
| May 5, 2:41 AM EDT | Special Weather Statement | CHS | Charleston | 34 min |
| May 5, 3:24 AM EDT | Special Marine Warning | CHS | 2 hr | |
| May 5, 3:44 AM EDT | Gale Watch | CHS | 11 hr | |
| May 5, 3:44 AM EDT | Small Craft Advisory | CHS | 11 hr | |
| May 5, 2:59 PM EDT | Gale Warning | CHS | 21 hr |
Nearby
Tornado Warnings in South Carolina, 2017Every tornado warning in 2017Tornadoes 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.