Alert archive / North Carolina / Special Weather Statements in 2021

Special Weather Statement, NWS Greenville-Spartanburg, SC

December 29, 2021Graham County, Jackson County, North Carolina

NWS Greenville-Spartanburg, SC issued this special weather statement at Dec 29, 2021, 9:59 PM EST for Graham County, Jackson County, North Carolina. It was in force for 46 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: Dec 29, 2021, 9:59 PM EST (02:59 UTC)
Expired: Dec 29, 2021, 10:45 PM EST
In force: 46 min
Issued by: NWS Greenville-Spartanburg, SC
Hail: 0.00 in
Wind: 40

Counties Graham County, NC, Jackson County, NC

The radar

The Knoxville radar (KMRX), 102 km from the middle of the area, began a volume at 03:00 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, 3.0 hours before the alert went out and 225 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: 251 J/kg
Mixed-layer CIN: -52 J/kg
Mixed-layer LCL: 790 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 228 m²/s²
0-3 km storm-relative helicity: 240 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 3.0

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.

NWS Greenville-Spartanburg, SC wrote its last area forecast discussion before this special weather statement went out at Dec 29, 6:46 PM EST, 3 hours 13 minutes earlier.

Area forecast discussion, Dec 29, 6:46 PM EST, 3 hours 13 minutes before

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Hazardous weather outlook, Dec 29, 5:59 AM EST, 16 hours before

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In the hours before

Special weather statement, Dec 29, 9:59 PM EST, 0 minutes before

Special Weather Statement
National Weather Service Greenville-Spartanburg SC
959 PM EST Wed Dec 29 2021

NCZ051-058-059-062-300345-
Graham NC-Swain NC-Northern Jackson NC-Macon NC-
959 PM EST Wed Dec 29 2021

...A strong thunderstorm will impact portions of northern Macon,
northern Jackson, Swain and Graham Counties through 1045 PM EST...

At 958 PM EST, Doppler radar was tracking a strong thunderstorm 11
miles west of Robbinsville, or 8 miles west of Town Of Santeetlah,
moving east at 55 mph.

HAZARD...Wind gusts up to 40 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
Sylva, Bryson City, Robbinsville, Cherokee, Cullowhee, Webster,
Dillsboro, Town Of Santeetlah, Smoky Mountains-Fontana Area and Lake
Santeetlah.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3537 8401 3541 8402 3544 8399 3560 8326
      3528 8298 3524 8315 3522 8371 3523 8369
      3526 8371 3524 8376 3526 8379 3525 8385
      3522 8396 3524 8401 3527 8401 3529 8403
      3531 8402 3531 8404 3535 8404
TIME...MOT...LOC 0258Z 269DEG 75KT 3533 8400

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

WJM

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 29, 10:46 PM EST	Special Weather Statement	GSP	Jackson, Macon, Transylvania	44 min
Dec 29, 11:21 PM EST	Special Weather Statement	GSP	Henderson, Polk, Transylvania	39 min
Dec 30, 12:00 AM EST	Special Weather Statement	GSP	Polk	45 min
Dec 30, 12:01 AM EST	Special Weather Statement	GSP	Polk	44 min
Dec 30, 12:43 AM EST	Special Weather Statement	GSP	Gaston	47 min
Dec 30, 2:42 AM EST	Special Weather Statement	GSP	Union	18 min
Dec 29, 11:48 PM EST	Special Weather Statement	GSP	Oconee	42 min
Dec 30, 12:25 AM EST	Special Weather Statement	GSP	Anderson	50 min
Dec 30, 1:08 AM EST	Special Weather Statement	GSP	Abbeville, Laurens, Union	37 min
Dec 30, 1:44 AM EST	Special Weather Statement	GSP	Chester, Greenwood, Union, York	46 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.