Alert archive / North Carolina / Mesoscale Discussions in 2004

Mesoscale Discussion 1018

May 31, 2004Robeson County, Sampson County, North Carolina

The Storm Prediction Center issued this mesoscale discussion at May 31, 2004, 12:46 PM EDT for Robeson County, Sampson County, North Carolina. It was in force for 29 min.

The area

The outline as issued.

The facts

Issued: May 31, 2004, 12:46 PM EDT (16:46 UTC)
Expired: May 31, 2004, 1:15 PM EDT
In force: 29 min
Issued by: the Storm Prediction Center

Counties Robeson County, NC, Sampson County, NC

The radar

The Wilmington radar (KLTX), 107 km from the middle of the area, began a volume at 16:48 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, 4.8 hours before the alert went out and 172 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: 1053 J/kg
Mixed-layer CIN: -71 J/kg
Mixed-layer LCL: 946 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 173 m²/s²
0-3 km storm-relative helicity: 172 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 5.9

Open this sounding in Storm Lab

The text

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

722 
ACUS11 KWNS 311647
SWOMCD
SPC MCD 311646 
NCZ000-SCZ000-311715-

MESOSCALE DISCUSSION 1018
NWS STORM PREDICTION CENTER NORMAN OK
1146 AM CDT MON MAY 31 2004

AREAS AFFECTED...CENTRAL PORTIONS OF SC AND NC

CONCERNING...SEVERE THUNDERSTORM WATCH 352...

VALID 311646Z - 311715Z

WW 352 WILL LIKELY BE CANCELLED BY 17Z.

AT 1630Z...VIS IMAGERY INDICATED THE OUTFLOW BOUNDARIES ASSOCIATED
WITH THE OVERNIGHT STORMS HAVE MOVED TO THE SOUTH AND EAST OF WW
352.  OBJECTIVE ANALYSES SHOW A STABLE AIR MASS IN THE WAKE OF THESE
BOUNDARIES...SUGGESTING ANY ADDITIONAL SEVERE THREAT WILL BE TO THE
SOUTH AND EAST OF THIS WW.

..PETERS.. 05/31/2004

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...RAH...ILM...CAE...

33998023 34477983 34837897 35497833 34907833

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 31, 1:40 AM EDT	Tornado Watch	SPC	Avery, Buncombe, Cherokee, Clay, Graham, Haywood and 8 more	5 hr
May 31, 4:40 AM EDT	Mesoscale Discussion	SPC	Avery, Buncombe, Cherokee, Clay, Graham, Haywood and 8 more	95 min
May 31, 5:50 AM EDT	Severe Thunderstorm Watch	SPC	Alamance, Alexander, Anson, Cabarrus, Caswell, Catawba and 21 more	5 hr
May 31, 7:56 AM EDT	Mesoscale Discussion	SPC	Alamance, Anson, Cabarrus, Caswell, Davidson, Davie and 13 more	2 hr
May 31, 9:10 AM EDT	Severe Thunderstorm Watch	SPC	Alamance, Anson, Cabarrus, Chatham, Cumberland, Davidson and 23 more	5 hr
May 31, 11:18 AM EDT	Mesoscale Discussion	SPC	Bladen, Brunswick, Columbus, Cumberland, New Hanover, Pender and 3 more	27 min
May 31, 11:40 AM EDT	Severe Thunderstorm Watch	SPC	Bladen, Columbus	6 hr
May 31, 2:27 PM EDT	Mesoscale Discussion	SPC	Bladen, Columbus	63 min
May 31, 3:50 PM EDT	Tornado Watch	SPC	Camden, Currituck, Pasquotank	6 hr

Nearby

Mesoscale Discussions in North Carolina, 2004 Every mesoscale discussion in 2004

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.