Alert archive / South Carolina / Special Weather Statements in 2020

Special Weather Statement, NWS Greenville-Spartanburg, SC

April 20, 2020Union County, South Carolina

NWS Greenville-Spartanburg, SC issued this special weather statement at Apr 20, 2020, 9:21 PM EDT for Union County, South Carolina. It was in force for 24 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: Apr 20, 2020, 9:21 PM EDT (01:21 UTC)
Expired: Apr 20, 2020, 9:45 PM EDT
In force: 24 min
Issued by: NWS Greenville-Spartanburg, SC

County Union County, SC

The radar

The Greer radar (KGSP), 44 km from the middle of the area, began a volume at 01:22 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, 1.4 hours before the alert went out and 213 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: 1468 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 112 m²/s²
0-3 km storm-relative helicity: 140 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Apr 20, 7:27 PM EDT, 1 hour 54 minutes earlier.

Area forecast discussion, Apr 20, 7:27 PM EDT, 1 hour 54 minutes before

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</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
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      <p id="message2">
        Please try again in a few minutes.
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Hazardous weather outlook, Apr 20, 1:32 PM EDT, 7 hours 49 minutes before

Hazardous Weather Outlook
National Weather Service Greenville-Spartanburg SC
132 PM EDT Mon Apr 20 2020

NCZ033-048>053-058-059-062>065-211745-
Avery-Madison-Yancey-Mitchell-Swain-Haywood-Buncombe-Graham-
Northern Jackson-Macon-Southern Jackson-Transylvania-Henderson-
132 PM EDT Mon Apr 20 2020

This Hazardous Weather Outlook is for western North Carolina.

.DAY ONE...This afternoon and tonight.

Hazardous weather is not expected at this time.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Areas of frost and a spotty freeze will be possible in parts of the
North Carolina mountains late Tuesday night and Wednesday morning.
Frost will be most likely in the sheltered mountain river valleys.

.SPOTTER INFORMATION STATEMENT...

None.

GAZ010-017-018-026-028-029-NCZ035>037-056-057-068>072-082-501>510-
SCZ001>014-019-211745-
Rabun-Habersham-Stephens-Franklin-Hart-Elbert-Alexander-Iredell-
Davie-Catawba-Rowan-Cleveland-Lincoln-Gaston-Mecklenburg-Cabarrus-
Union NC-Caldwell Mountains-Greater Caldwell-Burke Mountains-
Greater Burke-McDowell Mountains-Eastern McDowell-
Rutherford Mountains-Greater Rutherford-Polk Mountains-Eastern Polk-
Oconee Mountains-Pickens Mountains-Greenville Mountains-
Greater Oconee-Greater Pickens-Greater Greenville-Spartanburg-
Cherokee-York-Anderson-Abbeville-Laurens-Union SC-Chester-Greenwood-
132 PM EDT Mon Apr 20 2020

This Hazardous Weather Outlook is for northeast Georgia, piedmont
North Carolina, western North Carolina and upstate South Carolina.

.DAY ONE...This afternoon and tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

None.

In the hours before

Special weather statement, Apr 20, 9:21 PM EDT, 0 minutes before

Special Weather Statement
National Weather Service Greenville-Spartanburg SC
921 PM EDT Mon Apr 20 2020

SCZ007-013-210145-
Union SC-Spartanburg SC-
921 PM EDT Mon Apr 20 2020

...A STRONG THUNDERSTORM WILL IMPACT SOUTHEASTERN SPARTANBURG AND
NORTHWESTERN UNION COUNTIES UNTIL 945 PM EDT...

At 921 PM EDT, Doppler radar was tracking a strong thunderstorm 4
miles southeast of Spartanburg, or near Cedar Springs, moving
southeast at 20 mph.

Locations to be impacted include...
Spartanburg, Pacolet, Roebuck, Buffalo, Jonesville, Pacolet Mills,
Croft State Park, Cedar Springs, Moore and Pauline.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Gusty winds can blow down trees that are dead, or that have weakened
root systems. Outdoor furniture and similar items can be tossed
around if not anchored. Seek shelter indoors.

&&

LAT...LON 3486 8201 3500 8189 3495 8176 3493 8175
      3493 8174 3491 8170 3491 8168 3490 8167
      3490 8164 3488 8164 3488 8160 3486 8155
      3464 8174
TIME...MOT...LOC 0121Z 305DEG 16KT 3489 8188

TDP

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 21, 3:03 AM EDT	Frost Advisory	GSP	Graham, Jackson, Macon, Swain	31 hr
Apr 21, 3:03 AM EDT	Wind Advisory	GSP	Avery, Buncombe, Burke, Caldwell, McDowell, Mitchell and 1 more	19 hr
Apr 20, 9:42 PM EDT	Special Weather Statement	GSP	Union	33 min
Apr 20, 10:17 PM EDT	Special Weather Statement	GSP	Union	28 min

Nearby

Special Weather Statements in South Carolina, 2020 Every special weather statement 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.