Alert archive / North Carolina / Special Weather Statements in 2021

Special Weather Statement, NWS Greenville-Spartanburg, SC

May 10, 2021Gaston County, North Carolina

NWS Greenville-Spartanburg, SC issued this special weather statement at May 10, 2021, 9:33 PM EDT for Gaston County, North Carolina. It was in force for 27 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 10, 2021, 9:33 PM EDT (01:33 UTC)
Expired: May 10, 2021, 10:00 PM EDT
In force: 27 min
Issued by: NWS Greenville-Spartanburg, SC

County Gaston County, NC

The radar

The Greer radar (KGSP), 120 km from the middle of the area, began a volume at 01:33 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 00:00Z, 1.6 hours before the alert went out and 130 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: 241 J/kg
Mixed-layer CIN: -24 J/kg
Mixed-layer LCL: 1112 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: -143 m²/s²
0-3 km storm-relative helicity: -33 m²/s²
Significant tornado parameter: -0.1
Supercell composite: -1.6

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

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

In the hours before

Special weather statement, May 10, 8:35 PM EDT, 58 minutes before

Special Weather Statement
National Weather Service Greenville-Spartanburg SC
835 PM EDT Mon May 10 2021

NCZ036-057-110100-
Rowan NC-Iredell NC-
835 PM EDT Mon May 10 2021

...A STRONG THUNDERSTORM WILL IMPACT SOUTHEASTERN IREDELL AND
SOUTHWESTERN ROWAN COUNTIES UNTIL 900 PM EDT...

At 835 PM EDT, Doppler radar was tracking a strong thunderstorm 12
miles south of Statesville, or near Mooresville, moving southeast at
15 mph.

Locations to be impacted include...
Kannapolis, Mooresville, China Grove, Landis, Enochville, Lake Norman
State Park, Lake Norman, Mount Ulla and Doolie.

Wind gusts up to 40 mph and pea size hail will be possible in these
areas.

LAT...LON 3550 8063 3551 8090 3558 8095 3559 8093
      3561 8094 3562 8092 3565 8096 3572 8083
      3557 8055
TIME...MOT...LOC 0035Z 312DEG 12KT 3561 8085

RWH

Special weather statement, May 10, 8:58 PM EDT, 35 minutes before

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Special weather statement, May 10, 8:59 PM EDT, 34 minutes before

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Local storm report, May 10, 9:18 PM EDT, 15 minutes before

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Special weather statement, May 10, 9:32 PM EDT, 1 minute before

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Special weather statement, May 10, 9:33 PM EDT, 0 minutes before

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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
May 10, 8:01 PM EDT	Special Weather Statement	GSP	Iredell	29 min
May 10, 8:35 PM EDT	Special Weather Statement	GSP	Rowan	25 min
May 10, 8:58 PM EDT	Special Weather Statement	GSP	Cleveland	32 min
May 10, 8:59 PM EDT	Special Weather Statement	GSP	Cabarrus	31 min
May 10, 9:32 PM EDT	Special Weather Statement	GSP	Cabarrus	28 min
May 10, 9:58 PM EDT	Special Weather Statement	GSP	Cabarrus	32 min
May 10, 9:59 PM EDT	Special Weather Statement	GSP	Gaston, Mecklenburg	31 min
May 10, 10:28 PM EDT	Special Weather Statement	GSP	Mecklenburg	32 min
May 10, 11:00 PM EDT	Special Weather Statement	GSP	Cabarrus	30 min

Nearby

Special Weather Statements in North Carolina, 2021 Every 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.