Alert archive / South Carolina / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 6, NWS Columbia, SC

March 26, 2021McCormick County, South Carolina

NWS Columbia, SC issued this severe thunderstorm warning at Mar 26, 2021, 8:23 AM EDT for McCormick County, South Carolina. It was in force for 22 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: Mar 26, 2021, 8:23 AM EDT (12:23 UTC)
Expired: Mar 26, 2021, 8:45 AM EDT
In force: 22 min
Issued by: NWS Columbia, SC
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County McCormick County, SC

The radar

The Greer radar (KGSP), 99 km from the middle of the area, began a volume at 12:22 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
Mar 26, 8:26 AM EDT	HAIL 1	1 Ssw Mount Carmel, SC	PUBLIC REPORTED NICKEL TO QUARTER SIZED HAIL ON FORT CHARLOTTE RD JUST SW OF MT. CARMEL. TIME ESTIMATED.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 0.4 hours before the alert went out and 203 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 926 m above ground
0-6 km bulk shear: 76 kt
0-1 km storm-relative helicity: -57 m²/s²
0-3 km storm-relative helicity: 108 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.2

Open this sounding in Storm Lab

The text

As transmitted.

456 
WUUS52 KCAE 261223
SVRCAE
SCC065-261245-
/O.NEW.KCAE.SV.W.0006.210326T1223Z-210326T1245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Columbia SC
823 AM EDT Fri Mar 26 2021

The National Weather Service in Columbia has issued a

* Severe Thunderstorm Warning for...
  Northwestern McCormick County in central South Carolina...

* Until 845 AM EDT.

* At 823 AM EDT, a severe thunderstorm was located over Bobby Brown
  State Park, or 16 miles southwest of Abbeville, moving northeast at
  55 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...
  Willington, Mount Carmel Park, Mount Carmel, Leroy's Ferry
  Recreation Area and Bordeaux.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection seek shelter inside a sturdy building and stay
away from windows.

Severe thunderstorms can produce large capsizing waves and frequent
lightning. If on or near Lake Strom Thurmond move away from the water
and take shelter!

&&

LAT...LON 3407 8253 3407 8251 3408 8248 3406 8245
      3406 8233 3400 8232 3399 8228 3399 8231
      3398 8231 3390 8248 3394 8251 3395 8256
      3399 8257 3402 8259
TIME...MOT...LOC 1223Z 238DEG 48KT 3399 8257 

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

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 26, 5:01 AM EDT	Special Weather Statement	CAE	Lancaster	29 min
Mar 26, 7:27 AM EDT	Special Weather Statement	CAE	Richland	33 min
Mar 26, 8:11 AM EDT	Special Weather Statement	CAE	McCormick	64 min
Mar 26, 10:39 AM EDT	River Flood Warning	CAE	Calhoun, Lexington, Richland	5 days
Mar 26, 10:39 AM EDT	River Flood Warning	CAE	Calhoun, Richland	6 days
Mar 26, 10:41 AM EDT	River Flood Advisory	CAE	Lexington, Richland	43 hr
Mar 26, 11:56 AM EDT	Special Weather Statement	CAE	Kershaw	49 min
Mar 26, 12:27 PM EDT	Special Weather Statement	CAE	Darlington	33 min
Mar 26, 2:09 PM EDT	Special Weather Statement	CAE	Chesterfield	51 min
Mar 26, 2:46 PM EDT	Severe Thunderstorm Warning	CAE	McCormick	44 min

Nearby

Severe Thunderstorm Warnings in South Carolina, 2021 Every 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.