Alert archive / North Carolina / Tornado Warnings in 2017

Tornado Warning 18, NWS Greenville-Spartanburg, SC

September 1, 2017Cabarrus County, Mecklenburg County, Rowan County, North Carolina

NWS Greenville-Spartanburg, SC issued this tornado warning at Sep 1, 2017, 7:12 PM EDT for Cabarrus County, Mecklenburg County, Rowan County, North Carolina. It was in force for 22 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
Sep 1, 2017, 7:12 PM EDT (23:12 UTC)
Expired
Sep 1, 2017, 7:34 PM EDT
In force
22 min
Issued by
NWS Greenville-Spartanburg, SC
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.0 in

Counties Cabarrus County, NC, Mecklenburg County, NC, Rowan County, NC

The radar

The Roanoke radar (KFCX), 161 km from the middle of the area, began a volume at 23:14 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Sep 1, 1:49 PM EDTTornado WatchSPC8 hr

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 11.2 hours before the alert went out and 78 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-pSkew-T log-p diagram, Greensboro/Hi Pt, NC at 12:00Z on 2017-09-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 208 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Greensboro/Hi Pt, NC at 12:00Z on 2017-09-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 86 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
208 J/kg
Mixed-layer CIN
-38 J/kg
Mixed-layer LCL
585 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
86 m²/s²
0-3 km storm-relative helicity
143 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

Open this sounding in Storm Lab

The text

As transmitted.

520 
WFUS52 KGSP 012312
TORGSP
NCC025-119-159-012345-
/O.NEW.KGSP.TO.W.0018.170901T2312Z-170901T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Greenville-Spartanburg SC
712 PM EDT FRI SEP 1 2017

The National Weather Service in Greenville-Spartanburg has issued a

* Tornado Warning for...
  Northwestern Cabarrus County in the Piedmont of North Carolina...
  North central Mecklenburg County in the Piedmont of North
  Carolina...
  Southern Rowan County in the Piedmont of North Carolina...

* Until 745 PM EDT
    
* At 711 PM EDT, a severe thunderstorm capable of producing a tornado
  was located near Huntersville, moving northeast at 45 mph.

  HAZARD...Tornado. 

  SOURCE...Radar indicated rotation. 

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely. 

* This dangerous storm will be near...
  Coddle Creek Reservoir around 720 PM EDT. 
  Kannapolis, Enochville and Landis around 730 PM EDT. 
  China Grove, Faith, Granite Quarry and Rockwell around 740 PM EDT. 

Other locations impacted by this dangerous thunderstorm include
Croft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

Please report damaging winds, hail, or flooding to the National
Weather Service Greenville-Spartanburg by calling toll free, 1, 800,
2 6 7, 8 1 0 1, or by posting on our Facebook page, or Tweet it using
hashtag nwsgsp. Your message should describe the event and the
specific location where it occurred.

&&

LAT...LON 3527 8081 3542 8095 3551 8083 3551 8074
      3557 8074 3577 8047 3574 8046 3572 8042
      3572 8034 3571 8032 3568 8033 3567 8031
      3563 8029 3563 8027 3560 8023
TIME...MOT...LOC 2311Z 231DEG 39KT 3540 8081 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

WJM
2 follow-up statements
579 
WWUS52 KGSP 012323
SVSGSP

Severe Weather Statement
National Weather Service Greenville-Spartanburg SC
723 PM EDT FRI SEP 1 2017

NCC025-119-159-012345-
/O.CON.KGSP.TO.W.0018.000000T0000Z-170901T2345Z/
Cabarrus NC-Mecklenburg NC-Rowan NC-
723 PM EDT FRI SEP 1 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 745 PM EDT FOR
NORTHWESTERN CABARRUS...NORTH CENTRAL MECKLENBURG AND SOUTHERN ROWAN
COUNTIES...
    
At 723 PM EDT, a severe thunderstorm capable of producing a tornado
was located near Kannapolis, or near Coddle Creek Reservoir, moving
northeast at 45 mph.

HAZARD...Tornado. 

SOURCE...Radar indicated rotation. 

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely. 

This dangerous storm will be near...
  Landis around 730 PM EDT. 
  Salisbury, Faith, China Grove, Granite Quarry and Rockwell around 
  740 PM EDT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

Please report damaging winds, hail, or flooding to the National
Weather Service Greenville-Spartanburg by calling toll free, 1, 800,
2 6 7, 8 1 0 1, or by posting on our Facebook page, or Tweet it using
hashtag nwsgsp. Your message should describe the event and the
specific location where it occurred.

&&

LAT...LON 3536 8078 3542 8095 3551 8083 3551 8074
      3557 8074 3577 8047 3574 8046 3572 8042
      3572 8034 3571 8032 3568 8033 3567 8031
      3563 8029 3563 8027 3561 8029
TIME...MOT...LOC 2323Z 231DEG 39KT 3548 8068 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

WJM
505 
WWUS52 KGSP 012334
SVSGSP

Severe Weather Statement
National Weather Service Greenville-Spartanburg SC
734 PM EDT FRI SEP 1 2017

NCC025-119-159-012344-
/O.CAN.KGSP.TO.W.0018.000000T0000Z-170901T2345Z/
Cabarrus NC-Mecklenburg NC-Rowan NC-
734 PM EDT FRI SEP 1 2017

...THE TORNADO WARNING FOR NORTHWESTERN CABARRUS...NORTH CENTRAL
MECKLENBURG AND SOUTHERN ROWAN COUNTIES IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore the warning has been cancelled.

A tornado watch remains in effect until 1000 PM EDT for the Piedmont
of North Carolina.

If you observed large hail or wind damage, please report it to the
National Weather Service Greenville-Spartanburg by calling toll free,
1, 800, 2 6 7, 8 1 0 1, or by posting on our Facebook page, or Tweet
it using hashtag nwsgsp. Your message should describe the event and
the specific location where it occurred.

LAT...LON 3536 8078 3542 8095 3551 8083 3551 8074
      3557 8074 3577 8047 3574 8046 3572 8042
      3572 8034 3571 8032 3568 8033 3567 8031
      3563 8029 3563 8027 3561 8029
TIME...MOT...LOC 2333Z 231DEG 39KT 3556 8056 

$$

WJM

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 1, 9:11 AM EDTWind AdvisoryGSPGraham, Haywood, Jackson, Macon, Swain9 hr
Sep 1, 1:49 PM EDTSpecial Weather StatementGSPGaston26 min
Sep 1, 1:52 PM EDTSpecial Weather StatementGSPMecklenburg23 min
Sep 1, 1:55 PM EDTSpecial Weather StatementGSPDavie, Rowan35 min
Sep 1, 2:21 PM EDTSpecial Weather StatementGSPCabarrus, Mecklenburg24 min
Sep 1, 2:25 PM EDTSevere Thunderstorm WarningGSPMecklenburg, Union50 min
Sep 1, 2:28 PM EDTSpecial Weather StatementGSPHenderson, Polk47 min
Sep 1, 2:45 PM EDTSevere Thunderstorm WarningGSPCabarrus, Davie, Mecklenburg, Rowan45 min
Sep 1, 3:10 PM EDTSpecial Weather StatementGSPBurke, Polk, Rutherford50 min
Sep 1, 3:33 PM EDTSpecial Weather StatementGSPCabarrus27 min
Sep 1, 4:53 PM EDTSpecial Weather StatementGSPAlexander, Catawba, Iredell52 min
Sep 1, 5:16 PM EDTSevere Thunderstorm WarningGSPAlexander, Catawba, Davie, Iredell, Rowan44 min
Sep 1, 5:58 PM EDTSpecial Weather StatementGSPIredell62 min
Sep 1, 6:43 PM EDTTornado WarningGSPBurke, Rutherford32 min
Sep 1, 6:49 PM EDTSevere Thunderstorm WarningGSPCabarrus, Davie, Iredell, Mecklenburg, Rowan41 min
Sep 1, 6:58 PM EDTTornado WarningGSPCabarrus, Rowan32 min
Sep 1, 7:15 PM EDTAreal Flood AdvisoryGSPCabarrus, Iredell, Mecklenburg, Rowan3 hr
Sep 1, 7:49 PM EDTSpecial Weather StatementGSPRowan26 min
Sep 1, 7:51 PM EDTFlash Flood WarningGSPCabarrus, Iredell, Mecklenburg, Rowan2 hr

Nearby

Tornado Warnings in North Carolina, 2017Every tornado warning in 2017Tornadoes in 2017

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.