Alert archive / South Carolina / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 48, NWS Charleston, SC
NWS Charleston, SC issued this severe thunderstorm warning at May 1, 2017, 7:06 PM EDT for 4 counties in South Carolina; Effingham County, Georgia. It was in force for 54 min. 1 report 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 1, 2017, 7:06 PM EDT (23:06 UTC)
- Expired
- May 1, 2017, 8:00 PM EDT
- In force
- 54 min
- Issued by
- NWS Charleston, SC
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Effingham County, GA, Allendale County, SC, Colleton County, SC, Hampton County, SC, Jasper County, SC
The radar
The Charleston,SC radar (KCLX), 29 km from the middle of the area, began a volume at 23:10 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 1, 7:44 PM EDT | TSTM WND DMG | 4 Ssw Cummings, SC | SC STATE HIGHWAY PATROL REPORTED A TREE DOWN NEAR THE INTERSECTION OF CAT BRANCH ROAD AND PINE BRANCH DRIVE. TIME OF EVENT WAS ESTIMATED FROM RADAR DATA. |
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 12:00Z, 11.1 hours before the alert went out and 103 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
- 32 J/kg
- Mixed-layer CIN
- -280 J/kg
- Mixed-layer LCL
- 858 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 118 m²/s²
- 0-3 km storm-relative helicity
- 137 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
632
WUUS52 KCHS 012306
SVRCHS
GAC103-SCC005-029-049-053-020000-
/O.NEW.KCHS.SV.W.0048.170501T2306Z-170502T0000Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Charleston SC
706 PM EDT MON MAY 1 2017
The National Weather Service in Charleston has issued a
* Severe Thunderstorm Warning for portions of...
Effingham County in southeastern Georgia...
Hampton County in southeastern South Carolina...
Colleton County in southeastern South Carolina...
Allendale County in southeastern South Carolina...
Jasper County in southeastern South Carolina...
* Until 800 PM EDT
* At 706 PM EDT, severe thunderstorms were located along a line
extending from 9 miles northeast of Allendale to near Lake Warren
State Park to 9 miles northwest of Springfield, moving east at 30
mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and powerlines.
* Locations impacted include...
Ridgeland, Allendale, Hampton, Yemassee, Lake Warren State Park,
Colleton, Varnville and Estill.
This warning includes I-95 in South Carolina between mile markers 19
and 20, between mile markers 22 and 30, and between mile markers 36
and 41.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Continuous cloud to ground lightning is occurring with these storms.
Move indoors immediately. If this is not possible, avoid open outdoor
spaces and remain low. Stay away from tall objects such as trees and
utility poles.
Report damage directly to the Charleston National Weather Service at
1-888-383-2024 when it is safe to do so.
&&
LAT...LON 3317 8075 3311 8067 3244 8099 3238 8151
3257 8144 3260 8139 3263 8142 3265 8139
3282 8134 3311 8128 3312 8120 3305 8113
3305 8110 3303 8108 3310 8096 3306 8090
3314 8088 3318 8079
TIME...MOT...LOC 2306Z 250DEG 24KT 3311 8121 3285 8126 3245 8145
HAIL...0.75IN
WIND...60MPH
$$3 follow-up statements
183
WWUS52 KCHS 012322
SVSCHS
Severe Weather Statement
National Weather Service Charleston SC
722 PM EDT MON MAY 1 2017
GAC103-SCC005-029-049-053-020000-
/O.CON.KCHS.SV.W.0048.000000T0000Z-170502T0000Z/
Effingham GA-Hampton SC-Colleton SC-Allendale SC-Jasper SC-
722 PM EDT MON MAY 1 2017
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM EDT
FOR EFFINGHAM...HAMPTON...COLLETON...ALLENDALE AND JASPER COUNTIES...
At 721 PM EDT, severe thunderstorms were located along a line
extending from 11 miles south of Bamberg to Hampton to 7 miles north
of Springfield, moving east at 40 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and powerlines.
Locations impacted include...
Ridgeland, Hampton, Yemassee, Lake Warren State Park, Colleton,
Varnville, Estill and Fairfax.
This warning includes I-95 in South Carolina between mile markers 19
and 20, between mile markers 22 and 30, and between mile markers 36
and 41.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Continuous cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
Report damage directly to the Charleston National Weather Service at
1-888-383-2024 when it is safe to do so.
&&
LAT...LON 3317 8075 3311 8067 3244 8099 3238 8151
3260 8139 3265 8135 3282 8126 3311 8128
3312 8120 3305 8113 3305 8110 3303 8108
3310 8096 3306 8090 3314 8088 3318 8079
TIME...MOT...LOC 2321Z 260DEG 34KT 3314 8106 3288 8111 3248 8130
HAIL...0.75IN
WIND...60MPH
$$738
WWUS52 KCHS 012338
SVSCHS
Severe Weather Statement
National Weather Service Charleston SC
738 PM EDT MON MAY 1 2017
SCC005-012348-
/O.CAN.KCHS.SV.W.0048.000000T0000Z-170502T0000Z/
Allendale SC-
738 PM EDT MON MAY 1 2017
...THE SEVERE THUNDERSTORM WARNING FOR ALLENDALE COUNTY IS
CANCELLED...
The storms which prompted the warning have moved out of the warned
area. therefore the warning has been cancelled.
LAT...LON 3317 8075 3311 8067 3244 8099 3239 8141
3262 8130 3280 8123 3306 8103 3306 8102
3309 8096 3306 8090 3314 8088 3318 8079
TIME...MOT...LOC 2338Z 250DEG 24KT 3318 8094 3292 8099 3252 8118
$$
GAC103-SCC029-049-053-020000-
/O.CON.KCHS.SV.W.0048.000000T0000Z-170502T0000Z/
Effingham GA-Hampton SC-Colleton SC-Jasper SC-
738 PM EDT MON MAY 1 2017
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM EDT
FOR EFFINGHAM...HAMPTON...COLLETON AND JASPER COUNTIES...
At 738 PM EDT, severe thunderstorms were located along a line
extending from 10 miles southeast of Bamberg to 8 miles east of
Hampton to 11 miles west of Ridgeland, moving east at 30 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and powerlines.
Locations impacted include...
Ridgeland, Hampton, Yemassee, Lake Warren State Park, Colleton,
Varnville, Estill and Furman.
This warning includes I-95 in South Carolina between mile markers 19
and 20, between mile markers 22 and 30, and between mile markers 36
and 41.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Continuous cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
Report damage directly to the Charleston National Weather Service at
1-888-383-2024 when it is safe to do so.
&&
LAT...LON 3317 8075 3311 8067 3244 8099 3239 8141
3262 8130 3280 8123 3306 8103 3306 8102
3309 8096 3306 8090 3314 8088 3318 8079
TIME...MOT...LOC 2338Z 250DEG 24KT 3318 8094 3292 8099 3252 8118
HAIL...0.75IN
WIND...60MPH
$$337
WWUS52 KCHS 012358
SVSCHS
Severe Weather Statement
National Weather Service Charleston SC
758 PM EDT MON MAY 1 2017
GAC103-SCC029-049-053-020008-
/O.EXP.KCHS.SV.W.0048.000000T0000Z-170502T0000Z/
Effingham GA-Hampton SC-Colleton SC-Jasper SC-
758 PM EDT MON MAY 1 2017
...THE SEVERE THUNDERSTORM WARNING FOR EFFINGHAM...HAMPTON...COLLETON
AND JASPER COUNTIES WILL EXPIRE AT 800 PM EDT...
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore the warning will be allowed to expire. However gusty winds
and heavy rain are still possible with these thunderstorms.
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Charleston.
LAT...LON 3317 8075 3311 8067 3244 8099 3239 8141
3262 8130 3280 8123 3306 8103 3306 8102
3309 8096 3306 8090 3314 8088 3318 8079
TIME...MOT...LOC 2358Z 250DEG 24KT 3322 8081 3296 8086 3256 8105
$$The office that day
Everything else NWS Charleston, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 1, 3:29 AM EDT | Lake Wind Advisory | CHS | Berkeley | 8 hr |
| May 1, 11:45 AM EDT | Wind Advisory | CHS | Berkeley, Colleton, Dorchester | 8 hr |
| May 1, 6:36 PM EDT | Special Weather Statement | CHS | Allendale | 39 min |
Nearby
Severe Thunderstorm Warnings in South Carolina, 2017Severe Thunderstorm Warnings in Georgia, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.