Alert archive / North Carolina / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 42, NWS Greenville-Spartanburg, SC

April 1, 2023Graham County, Swain County, North Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Apr 1, 2023, 6:41 AM EDT for Graham County, Swain County, North Carolina. It was in force for 34 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: Apr 1, 2023, 6:41 AM EDT (10:41 UTC)
Expired: Apr 1, 2023, 7:15 AM EDT
In force: 34 min
Issued by: NWS Greenville-Spartanburg, SC
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Graham County, NC, Swain County, NC

The radar

The Knoxville radar (KMRX), 87 km from the middle of the area, began a volume at 10:41 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

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 10.7 hours before the alert went out and 240 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: 1560 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 125 m²/s²
0-3 km storm-relative helicity: 313 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Greenville-Spartanburg, SC wrote its last area forecast discussion before this severe thunderstorm warning went out at Mar 31, 2:49 PM EDT, 15 hours 52 minutes earlier.

Area forecast discussion, Mar 31, 2:49 PM EDT, 15 hours 52 minutes before

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Hazardous weather outlook, Mar 31, 12:09 PM EDT, 18 hours 32 minutes before

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        The site you requested is temporarily down for maintenance or an unexpected outage.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 1, 6:23 AM EDT	Severe Thunderstorm Warning	GSP	Buncombe, Madison, Yancey	37 min
Apr 1, 6:59 AM EDT	Severe Thunderstorm Warning	GSP	Madison, Mitchell, Yancey	46 min
Apr 1, 7:09 AM EDT	Severe Thunderstorm Warning	GSP	Jackson, Macon, Swain	36 min
Apr 1, 7:34 AM EDT	Special Weather Statement	GSP	Jackson	26 min
Apr 1, 8:30 AM EDT	Special Weather Statement	GSP	Oconee, Pickens	30 min
Apr 1, 9:00 AM EDT	Special Weather Statement	GSP	Greenville, Spartanburg	30 min
Apr 1, 9:11 AM EDT	Special Weather Statement	GSP	Laurens	34 min
Apr 1, 10:17 AM EDT	Special Weather Statement	GSP	Abbeville, Greenwood	28 min
Apr 1, 8:00 AM EDT	Special Weather Statement	GSP	Habersham, Stephens	30 min
Apr 1, 8:20 AM EDT	Special Weather Statement	GSP	Franklin, Hart, Stephens	25 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 2023 Every severe thunderstorm warning in 2023

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.