Alert archive / North Carolina / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 339, NWS Greenville-Spartanburg, SC
NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Sep 27, 2018, 3:30 PM EDT for Cabarrus County, Mecklenburg County, North Carolina. It was in force for 33 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
- Sep 27, 2018, 3:30 PM EDT (19:30 UTC)
- Expired
- Sep 27, 2018, 4:03 PM EDT
- In force
- 33 min
- Issued by
- NWS Greenville-Spartanburg, SC
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Cabarrus County, NC, Mecklenburg County, NC
The radar
The Greer radar (KGSP), 147 km from the middle of the area, began a volume at 19:33 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 12:00Z, 7.5 hours before the alert went out and 111 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.
- Mixed-layer CAPE
- 363 J/kg
- Mixed-layer CIN
- -31 J/kg
- Mixed-layer LCL
- 616 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 39 m²/s²
- 0-3 km storm-relative helicity
- 73 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
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 Sep 27, 2:33 PM EDT, 57 minutes earlier.
Area forecast discussion, Sep 27, 2:33 PM EDT, 57 minutes before
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</html>Hazardous weather outlook, Sep 27, 6:48 AM EDT, 8 hours 42 minutes before
Hazardous Weather Outlook National Weather Service Greenville-Spartanburg SC 648 AM EDT Thu Sep 27 2018 NCZ033-048>052-058-059-062-281100- Avery-Madison-Yancey-Mitchell-Swain-Haywood-Graham-Northern Jackson- Macon- 648 AM EDT Thu Sep 27 2018 ...FLASH FLOOD WATCH IN EFFECT THROUGH THIS EVENING... This Hazardous Weather Outlook is for western North Carolina. .DAY ONE...Today and tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Flash Flood Watch. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. Hazardous weather is not expected at this time. .SPOTTER INFORMATION STATEMENT... Spotters are requested to forward any reports of flash flooding to our office. GAZ010-017-018-026-028-029-NCZ035>037-053-056-057-063>065-068>072- 082-501>510-SCZ001>014-019-281100- Rabun-Habersham-Stephens-Franklin-Hart-Elbert-Alexander-Iredell- Davie-Buncombe-Catawba-Rowan-Southern Jackson-Transylvania-Henderson- Cleveland-Lincoln-Gaston-Mecklenburg-Cabarrus-Union- 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-Chester-Greenwood- 648 AM EDT Thu Sep 27 2018 This Hazardous Weather Outlook is for northeast Georgia, piedmont North Carolina, western North Carolina and upstate South Carolina. .DAY ONE...Today and tonight. An unstable airmass will combine with moderate deep-layered shear to produced lines and clusters of thunderstorms this afternoon across the foothills and piedmont of the Carolinas and Northeast Georgia. Some of these storms may become organized and reach severe criteria. The greatest threats will be damaging downburst and outflow winds along with large hail. Cloud to ground lightning will be quite frequent in the stronger and longer-lived convective cells. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. Hazardous weather is not expected at this time. .SPOTTER INFORMATION STATEMENT... Spotters are requested to forward any reports of large hail, damaging winds, tornadoes, or flash flooding to our office. Krentz
In the hours before
Special weather statement, Sep 27, 3:05 PM EDT, 25 minutes before
Special Weather Statement
National Weather Service Greenville-Spartanburg SC
305 PM EDT THU SEP 27 2018
NCZ070-071-SCZ009-271930-
Gaston NC-Mecklenburg NC-York SC-
305 PM EDT THU SEP 27 2018
...A STRONG THUNDERSTORM WILL IMPACT SOUTHWESTERN MECKLENBURG...
SOUTHEASTERN GASTON AND NORTHEASTERN YORK COUNTIES UNTIL 330 PM
EDT...
At 305 PM EDT, Doppler radar was tracking a strong thunderstorm 5
miles northeast of York, or 4 miles southeast of Clover, moving
northeast at 25 mph.
Locations to be impacted include...
York, Tega Cay, Clover, Town Of Lake Wylie, Steele Creek, Carowinds,
Lake Wylie, Newport, Belmont and Southwest Charlotte.
Wind gusts up to 50 mph and dime 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.
Dime to nickel size hail can cause considerable damage to vehicles.
Consider moving vehicles to a covered storage area before the storm
arrives.
&&
LAT...LON 3507 8090 3507 8091 3506 8090 3495 8123
3507 8131 3525 8102 3506 8089
TIME...MOT...LOC 1905Z 240DEG 22KT 3505 8118
08Special weather statement, Sep 27, 3:25 PM EDT, 5 minutes before
Special Weather Statement
National Weather Service Greenville-Spartanburg SC
325 PM EDT THU SEP 27 2018
NCZ071-272000-
Mecklenburg NC-
325 PM EDT THU SEP 27 2018
...A STRONG THUNDERSTORM WILL IMPACT CENTRAL MECKLENBURG COUNTY UNTIL
400 PM EDT...
At 324 PM EDT, Doppler radar was tracking a strong thunderstorm 6
miles west of Uptown Charlotte, or over Charlotte Douglas Airport,
moving northeast at 25 mph.
Locations to be impacted include... Charlotte, Freedom Park, Reedy
Creek Park, The Plaza and Charlotte Douglas Airport.
Wind gusts up to 50 mph, dime size hail and very heavy rainfall rates
up to 2 inches per hour 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.
Dime to nickel size hail can cause considerable damage to vehicles.
Consider moving vehicles to a covered storage area before the storm
arrives.
This storm may intensify, so be certain to monitor local radio and tv
stations, as well as local cable tv outlets for additional
information and possible warnings from the National Weather Service.
&&
LAT...LON 3512 8096 3520 8101 3521 8100 3522 8101
3525 8101 3541 8078 3521 8064
TIME...MOT...LOC 1924Z 240DEG 21KT 3522 8096
08The office that day
Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 27, 3:25 PM EDT | Special Weather Statement | GSP | Mecklenburg | 35 min |
| Sep 27, 4:03 PM EDT | Special Weather Statement | GSP | Cabarrus | 27 min |
| Sep 27, 4:38 PM EDT | Special Weather Statement | GSP | Cabarrus | 22 min |
| Sep 27, 6:35 PM EDT | Special Weather Statement | GSP | Alexander | 25 min |
| Sep 27, 6:40 PM EDT | Severe Thunderstorm Warning | GSP | Alexander, Catawba, Iredell | 50 min |
| Sep 27, 6:53 PM EDT | Severe Thunderstorm Warning | GSP | Henderson, Polk | 67 min |
| Sep 27, 7:51 PM EDT | Severe Thunderstorm Warning | GSP | Burke, Catawba, Cleveland, Gaston, Lincoln, McDowell and 2 more | 54 min |
| Sep 26, 8:34 PM EDT | Special Weather Statement | GSP | Chester | 41 min |
| Sep 27, 3:05 PM EDT | Special Weather Statement | GSP | York | 25 min |
| Sep 27, 6:00 PM EDT | Severe Thunderstorm Warning | GSP | Abbeville, Anderson, Oconee, Pickens | 60 min |
| Sep 27, 6:47 PM EDT | Tornado Warning | GSP | Anderson, Pickens | 28 min |
| Sep 27, 7:20 PM EDT | Special Weather Statement | GSP | Cherokee | 25 min |
Nearby
Severe Thunderstorm Warnings in North Carolina, 2018Every severe thunderstorm warning in 2018
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.