Alert archive / South Carolina / Special Weather Statements in 2021
Special Weather Statement, NWS Greenville-Spartanburg, SC
NWS Greenville-Spartanburg, SC issued this special weather statement at May 4, 2021, 3:21 PM EDT for Laurens County, Union County, South Carolina. It was in force for 24 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
- May 4, 2021, 3:21 PM EDT (19:21 UTC)
- Expired
- May 4, 2021, 3:45 PM EDT
- In force
- 24 min
- Issued by
- NWS Greenville-Spartanburg, SC
Counties Laurens County, SC, Union County, SC
The radar
The Greer radar (KGSP), 65 km from the middle of the area, began a volume at 19:21 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 nearest sounding before it
Charleston AFB, SC (KCHS), launched 12:00Z, 7.4 hours before the alert went out and 237 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.
440
WWUS82 KGSP 041921
SPSGSP
Special Weather Statement
National Weather Service Greenville-Spartanburg SC
321 PM EDT Tue May 4 2021
SCZ012-013-041945-
Laurens SC-Union SC-
321 PM EDT Tue May 4 2021
...A STRONG THUNDERSTORM WILL IMPACT CENTRAL LAURENS AND SOUTHERN
UNION COUNTIES UNTIL 345 PM EDT...
At 321 PM EDT, Doppler radar was tracking a strong thunderstorm 6
miles south of Laurens, or 6 miles northeast of Waterloo, moving
northeast at 50 mph.
Locations to be impacted include...
Union, Laurens, Clinton, Monarch Mill, Joanna, Cross Hill, Rose Hill
State Park, Waterloo, Mountville and Kinards.
Wind gusts up to 45 mph and pea size hail will be possible in these
areas.
LAT...LON 3429 8201 3445 8211 3459 8187 3458 8186
3460 8185 3475 8159 3451 8142 3450 8142
3449 8144 3449 8149 3445 8154 3448 8156
3453 8164 3452 8165 3446 8170 3444 8173
3436 8179 3433 8185
TIME...MOT...LOC 1921Z 240DEG 42KT 3442 8198
$$
WJMThe office that day
Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 4, 10:57 AM EDT | Severe Thunderstorm Warning | GSP | Graham, Haywood, Jackson, Macon, Swain | 36 min |
| May 4, 12:09 PM EDT | Areal Flood Advisory | GSP | Graham, Macon, Swain | 3 hr |
| May 4, 3:24 PM EDT | Special Weather Statement | GSP | Cabarrus, Mecklenburg | 36 min |
| May 4, 3:39 PM EDT | Special Weather Statement | GSP | Union | 51 min |
| May 4, 3:53 PM EDT | Severe Thunderstorm Warning | GSP | Union | 52 min |
| May 4, 12:36 PM EDT | Special Weather Statement | GSP | Greenville | 24 min |
| May 4, 1:23 PM EDT | Special Weather Statement | GSP | Pickens | 37 min |
| May 4, 2:19 PM EDT | Special Weather Statement | GSP | Spartanburg | 26 min |
| May 4, 2:51 PM EDT | Special Weather Statement | GSP | Union, York | 39 min |
| May 4, 3:05 PM EDT | Special Weather Statement | GSP | Abbeville | 40 min |
| May 4, 3:44 PM EDT | Severe Thunderstorm Warning | GSP | Abbeville, Greenwood, Laurens | 13 min |
| May 4, 2:24 PM EDT | Special Weather Statement | GSP | Franklin, Hart | 36 min |
| May 4, 2:32 PM EDT | Special Weather Statement | GSP | Hart | 28 min |
Nearby
Special Weather Statements in South Carolina, 2021Every special weather statement 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.