Alert archive / North Carolina / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 276, NWS Greenville-Spartanburg, SC

July 28, 2020Davie County, Iredell County, North Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Jul 28, 2020, 3:09 PM EDT for Davie County, Iredell County, North Carolina. It was in force for 51 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 28, 2020, 3:09 PM EDT (19:09 UTC)
Expired: Jul 28, 2020, 4:00 PM EDT
In force: 51 min
Issued by: NWS Greenville-Spartanburg, SC
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Davie County, NC, Iredell County, NC

The radar

The Roanoke radar (KFCX), 134 km from the middle of the area, began a volume at 19:11 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

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 7.2 hours before the alert went out and 76 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: 702 J/kg
Mixed-layer CIN: -76 J/kg
Mixed-layer LCL: 1352 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: 2 m²/s²
0-3 km storm-relative helicity: 23 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The office that day

Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 28, 2:00 PM EDT	Special Weather Statement	GSP	Caldwell	30 min
Jul 28, 2:33 PM EDT	Special Weather Statement	GSP	Burke	42 min
Jul 28, 4:35 PM EDT	Special Weather Statement	GSP	Henderson	25 min
Jul 28, 5:03 PM EDT	Special Weather Statement	GSP	Henderson	42 min
Jul 28, 5:15 PM EDT	Special Weather Statement	GSP	Cabarrus	45 min
Jul 28, 5:27 PM EDT	Special Weather Statement	GSP	Henderson	48 min
Jul 28, 5:31 PM EDT	Special Weather Statement	GSP	McDowell	44 min
Jul 28, 6:58 PM EDT	Special Weather Statement	GSP	Jackson	32 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 2020 Every severe thunderstorm warning in 2020

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.