Alert archive / North Carolina / High Wind Watches in 2020

High Wind Watch 1, NWS Greenville-Spartanburg, SC

January 3, 2020Avery County, Mitchell County, Yancey County, North Carolina

NWS Greenville-Spartanburg, SC issued this high wind watch at Jan 3, 2020, 3:30 PM EST for Avery County, Mitchell County, Yancey County, North Carolina. It took effect at Jan 4, 2020, 6:00 PM EST. It was in force for .

The area

The counties it named.

The facts

Issued: Jan 3, 2020, 3:30 PM EST (20:30 UTC)
In effect from: Jan 4, 2020, 6:00 PM EST
Expired: Jan 4, 2020, 4:02 AM EST
In force
Issued by: NWS Greenville-Spartanburg, SC

Counties Avery County, NC, Mitchell County, NC, Yancey County, NC

The radar

The Knoxville radar (KMRX), 116 km from the middle of the area, began a volume at 20:33 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

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 8.5 hours before the alert went out and 364 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: 234 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 530 m above ground
0-6 km bulk shear: 80 kt
0-1 km storm-relative helicity: 84 m²/s²
0-3 km storm-relative helicity: 134 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this high wind watch 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 high wind watch went out at Jan 3, 2:52 PM EST, 38 minutes earlier.

Area forecast discussion, Jan 3, 2:52 PM EST, 38 minutes before

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Hazardous weather outlook, Jan 3, 11:31 AM EST, 3 hours 59 minutes before

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In the hours before

Special weather statement, Jan 3, 1:49 PM EST, 1 hour 41 minutes before

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Special weather statement, Jan 3, 2:03 PM EST, 1 hour 27 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
Jan 3, 5:39 PM EST	Special Weather Statement	GSP	Union	36 min
Jan 3, 11:37 AM EST	Areal Flood Advisory	GSP	Greenville	12 hr
Jan 3, 11:56 AM EST	Areal Flood Advisory	GSP	Anderson, Oconee, Pickens	12 hr
Jan 3, 1:49 PM EST	Special Weather Statement	GSP	Greenwood	26 min
Jan 3, 2:03 PM EST	Special Weather Statement	GSP	Greenwood	27 min
Jan 3, 3:38 PM EST	Special Weather Statement	GSP	Greenwood	37 min
Jan 3, 4:13 PM EST	Special Weather Statement	GSP	Union	32 min
Jan 3, 4:47 PM EST	Special Weather Statement	GSP	Chester	28 min

Nearby

High Wind Watches in North Carolina, 2020 Every high wind watch 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.