Alert archive / North Carolina / Mesoscale Discussions in 2011

Mesoscale Discussion 359

April 5, 2011Cabarrus County, Mecklenburg County, Rowan County, North Carolina; Chester County, Greenwood County, Newberry County, South Carolina

The Storm Prediction Center issued this mesoscale discussion at Apr 5, 2011, 2:24 AM EDT for Cabarrus County, Mecklenburg County, Rowan County, North Carolina; Chester County, Greenwood County, Newberry County, South Carolina. It was in force for 66 min.

The area

The outline as issued.

The facts

Issued: Apr 5, 2011, 2:24 AM EDT (06:24 UTC)
Expired: Apr 5, 2011, 3:30 AM EDT
In force: 66 min
Issued by: the Storm Prediction Center

Counties Cabarrus County, NC, Mecklenburg County, NC, Rowan County, NC, Chester County, SC, Greenwood County, SC, Newberry County, SC

The radar

The Greer radar (KGSP), 80 km from the middle of the area, began a volume at 06:24 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 00:00Z, 6.4 hours before the alert went out and 205 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2364 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 144 m²/s²
0-3 km storm-relative helicity: 291 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

460 
ACUS11 KWNS 050625
SWOMCD
SPC MCD 050624
NCZ000-SCZ000-050730-

MESOSCALE DISCUSSION 0359
NWS STORM PREDICTION CENTER NORMAN OK
0124 AM CDT TUE APR 05 2011

AREAS AFFECTED...PORTIONS WRN CAROLINAS.

CONCERNING...SEVERE THUNDERSTORM WATCH 97...

VALID 050624Z - 050730Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 97
CONTINUES.

SVR SQUALL LINE WITH EMBEDDED BOW/LEWP FORMATIONS AND MESOVORTICES
WILL CONTINUE MOVING EWD AND WILL CLEAR ERN-MOST COUNTIES OF WW AREA
BEFORE SCHEDULED 7Z EXPIRATION.  ACTIVITY WILL MOVE INTO TORNADO WW
100.  REMAINING PORTIONS WW MAY BE CLEARED ACCORDINGLY OR ALLOWED TO
EXPIRE AS SCHEDULED...AS COLD FRONT WILL BE FOLLOWING CLOSE BEHIND
PASSAGE OF CONVECTION.  COMBINED EFFECTS OF POST-CONVECTIVE COOLING
AND POST-FRONTAL CAA WILL RENDER AIR MASS TOO STABLE TO MAINTAIN SVR
THREAT.

..EDWARDS.. 04/05/2011

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

ATTN...WFO...RAH...CAE...GSP...

LAT...LON   34048232 34808126 35928046 35528014 34368127 34098189
            34048232

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 4, 9:32 PM EDT	Mesoscale Discussion	SPC	Alexander, Buncombe, Burke, Catawba, Cleveland, Gaston and 8 more	58 min
Apr 4, 9:45 PM EDT	Severe Thunderstorm Watch	SPC	Alexander, Avery, Buncombe, Burke, Cabarrus, Caldwell and 22 more	5 hr
Apr 5, 12:21 AM EDT	Mesoscale Discussion	SPC	Alamance, Anson, Chatham, Cumberland, Harnett, Hoke and 7 more	84 min
Apr 5, 12:36 AM EDT	Severe Thunderstorm Watch	SPC	Alleghany, Caswell, Rockingham, Stokes, Surry, Wilkes and 1 more	111 min
Apr 5, 12:48 AM EDT	Tornado Watch	SPC	Alamance, Anson, Bladen, Chatham, Cumberland, Davidson and 27 more	5 hr
Apr 5, 2:13 AM EDT	Mesoscale Discussion	SPC	Forsyth, Rockingham, Stokes, Surry, Yadkin	32 min
Apr 5, 2:18 AM EDT	Tornado Watch	SPC	Bertie, Camden, Caswell, Chowan, Currituck, Gates and 5 more	8 hr
Apr 5, 3:34 AM EDT	Mesoscale Discussion	SPC	Alamance, Beaufort, Bertie, Bladen, Brunswick, Camden and 49 more	116 min
Apr 5, 4:00 AM EDT	Tornado Watch	SPC	Beaufort, Bladen, Brunswick, Carteret, Columbus, Craven and 15 more	6 hr
Apr 5, 7:08 AM EDT	Mesoscale Discussion	SPC	Beaufort, Brunswick, Carteret, Craven, Currituck, Dare and 10 more	2 hr
Apr 5, 10:15 AM EDT	Mesoscale Discussion	SPC	Beaufort, Bertie, Bladen, Brunswick, Camden, Carteret and 26 more	90 min
Apr 4, 10:05 PM EDT	Mesoscale Discussion	SPC	Edgefield	55 min
Apr 5, 2:41 AM EDT	Tornado Watch	SPC	Allendale, Beaufort, Berkeley, Charleston, Colleton, Dorchester and 2 more	6 hr
Apr 5, 2:55 AM EDT	Mesoscale Discussion	SPC	Allendale, Bamberg, Beaufort, Berkeley, Charleston, Colleton and 3 more	2 hr
Apr 5, 5:39 AM EDT	Mesoscale Discussion	SPC	Beaufort, Charleston	2 hr

Nearby

Mesoscale Discussions in North Carolina, 2011 Mesoscale Discussions in South Carolina, 2011 Every mesoscale discussion in 2011

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.