Alert archive / North Carolina / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 134, NWS Greenville-Spartanburg, SC

October 25, 2001Haywood County, Jackson County, North Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at Oct 25, 2001, 2:09 AM EDT for Haywood County, Jackson County, North Carolina. It was in force for 36 min. 2 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Oct 25, 2001, 2:09 AM EDT (06:09 UTC)
Expired: Oct 25, 2001, 2:45 AM EDT
In force: 36 min
Issued by: NWS Greenville-Spartanburg, SC
Area: Whole counties

Counties Haywood County, NC, Jackson County, NC

The radar

The Knoxville radar (KMRX), 89 km from the middle of the area, began a volume at 06:09 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.

What was reported inside it

Time	Report	Where	Remark
Oct 25, 2:15 AM EDT	Thunderstorm Wind 60 E	Cullowhee, NC	Trees and power lines were blown down across the county as a squall line raced across the higher terrain of North Carolina. A small plane tied down at the Jackson County airport was flipped and heavily damaged. Some trees fell onto roads. Trees were also blown
Oct 25, 2:30 AM EDT	Thunderstorm Wind 50 E	Waynesville, NC	The top was blown out of a large tree, resulting in damage to a car and a house.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 6.2 hours before the alert went out and 264 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: 1415 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 893 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 209 m²/s²
0-3 km storm-relative helicity: 270 m²/s²
Significant tornado parameter: 1.7
Supercell composite: 7.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

926 
WUUS52 KGSP 250610
SVRGSP
NCC087-099-250645-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
209 AM EDT THU OCT 25 2001

THE NATIONAL WEATHER SERVICE IN GREENVILLE-SPARTANBURG HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  HAYWOOD COUNTY IN WESTERN NORTH CAROLINA
  JACKSON COUNTY IN WESTERN NORTH CAROLINA

* UNTIL 245 AM EDT

* AT 209 AM EDT...NATIONAL WEATHER SERVICE RADAR INDICATED A LINE OF
  SEVERE THUNDERSTORMS WITH LARGE HAIL AND DAMAGING WINDS FROM 8
  MILES SOUTHWEST OF MARSHALL TO 11 MILES EAST OF FRANKLIN...MOVING
  EAST AT 40 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  CANTON AT 215 AM EDT.
  CASHIERS AT 220 AM EDT.
  CRUSO AT 225 AM EDT.

PEOPLE IN THE PATH OF THIS LINE OF SEVERE THUNDERSTORMS SHOULD BE
ALERT FOR LARGE HAIL AND DAMAGING WINDS. FREQUENT LIGHTNING AND
LOCALLY HEAVY RAIN CAN OCCUR WITH ANY THUNDERSTORM.

$$
HG/BPM

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 Oct 25, 12:25 AM EDT, 1 hour 44 minutes earlier.

Area forecast discussion, Oct 25, 12:25 AM EDT, 1 hour 44 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
1225 AM EDT THU OCT 25 2001

A QUICK UPDATE TO THE ZFP TO ADD THUNDERSTORMS TO THE REMAINDER OF
THE FORECAST AREA IN LIGHT OF CONVECTION FIRING EAST OF THE
MOUNTAINS AT THIS TIME. WILL ALSO INCREASE PRECIP CHANCE ACROSS THE
ENTIRE CWA TO ACCOUNT FOR LINE OF THUNDERSTORMS MOVING IN FROM
EASTERN TENNESSEE.

.GSP...
GA...WIND ADVISORY FOR TONIGHT AND THURSDAY ZONES GAZ010...GAZ017.
NC...WIND ADVISORY FOR TONIGHT AND THURSDAY FOR ZONES
     NCZ033...NCZ048>053...NCZ058>059...NCZ062>065.
SC...WIND ADVISORY FOR TONIGHT AND THURSDAY FOR ZONES SCZ001>003.

MOORE

In the hours before

Special weather statement, Oct 24, 9:02 PM EDT, 5 hours 7 minutes before

NCZ033-048>053-058-059-062>065-250645-

SEVERE WEATHER OUTLOOK
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
902 PM EDT WED OCT 24 2001

...SEVERE THUNDERSTORMS POSSIBLE IN THE WESTERN MOUNTAINS OF NORTH
CAROLINA...

LATE WEDNESDAY EVENING...A LINE OF SEVERE THUNDERSTORMS WAS RAPIDLY
MOVING EAST...IN EXCESS OF 50 MPH...ACROSS CENTRAL TENNESSEE. THE
LINE WILL GRADUALLY WEAKEN AS IT MOVES EAST INTO COOLER...MORE
STABLE AIR. HOWEVER...AS THE LINE ENTERS THE WESTERN NORTH CAROLINA
MOUNTAINS SHORTLY AFTER MIDNIGHT...DAMAGING WINDS WILL STILL BE
POSSIBLE. HIGHER ELEVATIONS IN THE SOUTHWEST MOUNTAIN COUNTIES OF
GRAHAM...SWAIN AND MACON WILL BE MOST AT RISK.

THE FACT THAT ENVIRONMENTAL WINDS WILL ALREADY BE STRONG AHEAD OF A
COLD FRONT WILL HELP TO AUGMENT THE STRONG WINDS ASSOCIATED WITH THE
LINE OF STORMS. IF THE LINE IS A LITTLE STRONGER THAN ANTICIPATED AS
IT ENTERS THE MOUNTAINS...DAMAGING WINDS WOULD EXTEND AS FAR EAST AS
ASHEVILLE...AND INTO THE NORTHERN MOUNTAINS.

DISPATCHERS SHOULD ENSURE COUNTY EMERGENCY MANAGEMENT OFFICIALS ARE
AWARE OF THIS INFORMATION.

MCAVOY

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 24, 11:37 PM EDT	Severe Thunderstorm Warning	GSP	Macon	38 min
Oct 25, 12:20 AM EDT	Severe Thunderstorm Warning	GSP	Graham, Swain	55 min
Oct 25, 2:15 AM EDT	Severe Thunderstorm Warning	GSP	Gaston	60 min
Oct 25, 2:26 AM EDT	Severe Thunderstorm Warning	GSP	Buncombe	49 min
Oct 25, 2:32 AM EDT	Severe Thunderstorm Warning	GSP	Henderson, Transylvania	43 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 2001 Every severe thunderstorm warning in 2001

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.