Alert archive / South Carolina / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 18, NWS Wilmington, NC
NWS Wilmington, NC issued this severe thunderstorm warning at May 4, 2021, 7:42 PM EDT for 4 counties in South Carolina. It was in force for 33 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 4, 2021, 7:42 PM EDT (23:42 UTC)
- Expired
- May 4, 2021, 8:15 PM EDT
- In force
- 33 min
- Issued by
- NWS Wilmington, NC
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Florence County, SC, Georgetown County, SC, Marion County, SC, Williamsburg County, SC
The radar
The Wilmington radar (KLTX), 118 km from the middle of the area, began a volume at 23:45 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, 7:55 PM EDT | TSTM WND DMG | 3 Wsw Stuckey, SC | SC PATROL REPORTS TREE DOWN ON ROAD AT INDIANTOWN SWAMP RD AND SC-261. TIME ESTIMATED VIA RADAR. |
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 |
|---|---|---|---|
| May 4, 4:56 PM EDT | Severe Thunderstorm Watch | SPC | 3 hr |
The nearest sounding before it
Charleston AFB, SC (KCHS), launched 12:00Z, 11.7 hours before the alert went out and 93 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
- 573 J/kg
- Mixed-layer CIN
- -149 J/kg
- Mixed-layer LCL
- 1000 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 68 m²/s²
- 0-3 km storm-relative helicity
- 48 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.0
The text
As transmitted.
848
WUUS52 KILM 042342
SVRILM
SCC041-043-067-089-050015-
/O.NEW.KILM.SV.W.0018.210504T2342Z-210505T0015Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Wilmington NC
742 PM EDT Tue May 4 2021
The National Weather Service in Wilmington has issued a
* Severe Thunderstorm Warning for...
Southeastern Florence County in northeastern South Carolina...
Northwestern Georgetown County in northeastern South Carolina...
West central Marion County in northeastern South Carolina...
Central Williamsburg County in northeastern South Carolina...
* Until 815 PM EDT.
* At 742 PM EDT, a severe thunderstorm was located near Kingstree,
moving east at 35 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor hail damage to vehicles is possible. Expect wind
damage to trees and power lines.
* Locations impacted include...
Lake City, Johnsonville, Hemingway, Rhems, Warsaw, Hannah, Poston,
Oatland, Nesmith, Indiantown, Outland, Gresham, Morrisville, Henry,
Kingsburg, Scranton, Stuckey and Lake City Community Hospital.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3350 7982 3369 7975 3392 7979 3402 7944
3348 7928
TIME...MOT...LOC 2342Z 254DEG 31KT 3370 7972
HAIL...1.00IN
WIND...60MPH
$$
213 follow-up statements
629
WWUS52 KILM 042357
SVSILM
Severe Weather Statement
National Weather Service Wilmington NC
757 PM EDT Tue May 4 2021
SCC041-043-067-089-050015-
/O.CON.KILM.SV.W.0018.000000T0000Z-210505T0015Z/
Florence SC-Georgetown SC-Marion SC-Williamsburg SC-
757 PM EDT Tue May 4 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM EDT
FOR SOUTHEASTERN FLORENCE...NORTHWESTERN GEORGETOWN...WEST CENTRAL
MARION AND CENTRAL WILLIAMSBURG COUNTIES...
At 757 PM EDT, a severe thunderstorm was located over Indiantown, or
14 miles southeast of Lake City, moving east at 35 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Minor hail damage to vehicles is possible. Expect wind
damage to trees and power lines.
Locations impacted include...
Lake City, Johnsonville, Hemingway, Rhems, Warsaw, Hannah, Poston,
Oatland, Nesmith, Indiantown, Outland, Gresham, Morrisville, Henry,
Kingsburg, Scranton, Stuckey and Lake City Community Hospital.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3350 7982 3369 7975 3392 7979 3402 7944
3348 7928
TIME...MOT...LOC 2357Z 254DEG 31KT 3374 7957
HAIL...1.00IN
WIND...60MPH
$$
21350
WWUS52 KILM 050004
SVSILM
Severe Weather Statement
National Weather Service Wilmington NC
804 PM EDT Tue May 4 2021
SCC067-050014-
/O.CAN.KILM.SV.W.0018.000000T0000Z-210505T0015Z/
Marion SC-
804 PM EDT Tue May 4 2021
...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL MARION COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 900 PM EDT for
northeastern South Carolina.
LAT...LON 3350 7982 3363 7962 3373 7960 3384 7968
3393 7947 3393 7946 3392 7946 3393 7945
3391 7945 3390 7943 3389 7940 3388 7941
3387 7939 3348 7928
TIME...MOT...LOC 0004Z 254DEG 31KT 3376 7950
$$
SCC041-043-089-050015-
/O.CON.KILM.SV.W.0018.000000T0000Z-210505T0015Z/
Florence SC-Georgetown SC-Williamsburg SC-
804 PM EDT Tue May 4 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM EDT
FOR SOUTHEASTERN FLORENCE...NORTHWESTERN GEORGETOWN AND NORTHEASTERN
WILLIAMSBURG COUNTIES...
At 804 PM EDT, a severe thunderstorm was located near Hemingway, or
16 miles southeast of Lake City, moving east at 35 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect wind damage to trees and power lines.
Locations impacted include...
Johnsonville, Hemingway, Rhems, Warsaw, Poston, Oatland, Nesmith,
Indiantown, Outland, Morrisville, Henry, Kingsburg, Hannah and
Stuckey.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3350 7982 3363 7962 3373 7960 3384 7968
3393 7947 3393 7946 3392 7946 3393 7945
3391 7945 3390 7943 3389 7940 3388 7941
3387 7939 3348 7928
TIME...MOT...LOC 0004Z 254DEG 31KT 3376 7950
HAIL...0.75IN
WIND...60MPH
$$
21109
WWUS52 KILM 050013
SVSILM
Severe Weather Statement
National Weather Service Wilmington NC
813 PM EDT Tue May 4 2021
SCC041-043-089-050022-
/O.EXP.KILM.SV.W.0018.000000T0000Z-210505T0015Z/
Florence SC-Georgetown SC-Williamsburg SC-
813 PM EDT Tue May 4 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN FLORENCE...
NORTHWESTERN GEORGETOWN AND NORTHEASTERN WILLIAMSBURG COUNTIES WILL
EXPIRE AT 815 PM EDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However gusty
winds are still possible with this thunderstorm.
A Severe Thunderstorm Watch remains in effect until 900 PM EDT for
northeastern South Carolina.
LAT...LON 3350 7982 3363 7962 3373 7960 3384 7968
3393 7947 3393 7946 3392 7946 3393 7945
3391 7945 3390 7943 3389 7940 3388 7941
3387 7939 3348 7928
TIME...MOT...LOC 0012Z 254DEG 31KT 3378 7942
$$
21The office that day
Everything else NWS Wilmington, NC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 3, 8:47 PM EDT | Severe Thunderstorm Warning | ILM | Georgetown | 43 min |
| May 4, 4:50 PM EDT | Special Weather Statement | ILM | Georgetown | 40 min |
| May 4, 5:08 PM EDT | Severe Thunderstorm Warning | ILM | Darlington, Marlboro | 52 min |
| May 4, 5:57 PM EDT | Severe Thunderstorm Warning | ILM | Darlington, Dillon, Marlboro | 33 min |
| May 4, 6:26 PM EDT | Special Weather Statement | ILM | Dillon, Florence | 49 min |
| May 4, 6:30 PM EDT | Severe Thunderstorm Warning | ILM | Dillon | 30 min |
| May 4, 7:04 PM EDT | Severe Thunderstorm Warning | ILM | Florence, Williamsburg | 41 min |
Nearby
Severe Thunderstorm Warnings in South Carolina, 2021Every severe thunderstorm warning 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.