Alert archive / North Carolina / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 22, NWS Greenville-Spartanburg, SC

May 6, 1999Macon County, North Carolina

NWS Greenville-Spartanburg, SC issued this severe thunderstorm warning at May 6, 1999, 1:52 AM EDT for Macon County, North Carolina. It was in force for 48 min. 1 report 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: May 6, 1999, 1:52 AM EDT (05:52 UTC)
Expired: May 6, 1999, 2:40 AM EDT
In force: 48 min
Issued by: NWS Greenville-Spartanburg, SC
Area: Whole counties

County Macon County, NC

What was reported inside it

Time	Report	Where	Remark
May 6, 2:00 AM EDT	Hail 1	Highlands, NC

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 watch it was issued in

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

Issued	Product	Office	Lasted
May 6, 1:45 AM EDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 5.9 hours before the alert went out and 221 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: 645 J/kg
Mixed-layer CIN: -78 J/kg
Mixed-layer LCL: 702 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 280 m²/s²
0-3 km storm-relative helicity: 335 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 9.1

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 May 5, 11:12 PM EDT, 2 hours 40 minutes earlier.

Area forecast discussion, May 5, 11:12 PM EDT, 2 hours 40 minutes before

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In the hours before

Special weather statement, May 5, 10:57 PM EDT, 2 hours 55 minutes before

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Local storm report, May 6, 1:44 AM EDT, 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE SPARTANBURG SC
144 AM EDT THU MAY 06 1999

TIME (EDT) .....CITY LOCATION....... ST   ...EVENT/REMARKS...
           .....COUNTY LOCATION.....

141 AM     CLAYTON                   GA   1.00 INCH HAIL
05/06/99   RABUN                          REPORTED BY COUNTY 911.

CSH

The office that day

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

Issued	Product	Office	Counties	Lasted
May 6, 1:59 AM EDT	Severe Thunderstorm Warning	GSP	Swain	51 min
May 6, 2:28 AM EDT	Severe Thunderstorm Warning	GSP	Jackson	47 min
May 6, 2:49 AM EDT	Severe Thunderstorm Warning	GSP	Haywood	36 min
May 6, 5:05 AM EDT	Severe Thunderstorm Warning	GSP	Jackson	35 min
May 6, 5:30 AM EDT	Severe Thunderstorm Warning	GSP	Haywood	30 min
May 6, 6:04 AM EDT	Severe Thunderstorm Warning	GSP	Buncombe	36 min
May 6, 6:22 AM EDT	Tornado Warning	GSP	Buncombe, McDowell, Yancey	33 min
May 6, 11:39 AM EDT	Severe Thunderstorm Warning	GSP	Laurens	46 min
May 6, 12:00 PM EDT	Severe Thunderstorm Warning	GSP	Union	50 min
May 6, 1:50 PM EDT	Severe Thunderstorm Warning	GSP	Greenwood	25 min
May 6, 1:18 AM EDT	Severe Thunderstorm Warning	GSP	Rabun	32 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 1999 Every severe thunderstorm warning in 1999

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.