Alert archive / North Carolina / Mesoscale Discussions in 2006

Mesoscale Discussion 1069

June 4, 20069 counties in Georgia; 11 counties in North Carolina; 11 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at Jun 4, 2006, 11:15 PM EDT for 9 counties in Georgia; 11 counties in North Carolina; 11 counties in South Carolina. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued: Jun 4, 2006, 11:15 PM EDT (03:15 UTC)
Expired: Jun 5, 2006, 12:45 AM EDT
In force: 90 min
Issued by: the Storm Prediction Center

All 31 counties

Bryan County, GA, Bulloch County, GA, Chatham County, GA, Effingham County, GA, Evans County, GA, Liberty County, GA, Long County, GA, McIntosh County, GA, Wayne County, GA, Bladen County, NC, Brunswick County, NC, Carteret County, NC, Columbus County, NC, Craven County, NC, Duplin County, NC, Jones County, NC, Lenoir County, NC, New Hanover County, NC, Onslow County, NC, Pender County, NC, Beaufort County, SC, Berkeley County, SC, Charleston County, SC, Colleton County, SC, Dorchester County, SC, Georgetown County, SC, Hampton County, SC, Horry County, SC, Jasper County, SC, Marion County, SC, Williamsburg County, SC

The radar

The Charleston,SC radar (KCLX), 122 km from the middle of the area, began a volume at 03:15 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

Charleston AFB, SC (KCHS), launched 00:00Z, 3.3 hours before the alert went out and 34 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: 582 J/kg
Mixed-layer CIN: -18 J/kg
Mixed-layer LCL: 1439 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: -10 m²/s²
0-3 km storm-relative helicity: 6 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

000 
ACUS11 KWNS 050315
SWOMCD
SPC MCD 050315 
NCZ000-SCZ000-GAZ000-050445-

MESOSCALE DISCUSSION 1069
NWS STORM PREDICTION CENTER NORMAN OK
1015 PM CDT SUN JUN 04 2006

AREAS AFFECTED...COASTAL CAROLINAS

CONCERNING...SEVERE THUNDERSTORM POTENTIAL 

VALID 050315Z - 050445Z

...THUNDERSTORMS ARE EXPECTED TO INCREASE OVER THE NEXT FEW HOURS...


SFC WIND SHIFT IS MOVING SEWD AT ROUGHLY 20KT ACROSS THE COASTAL
CAROLINAS AND SHOULD APPROACH THE COAST AROUND 06-07Z TIME FRAME. 
SCATTERED THUNDERSTORMS HAVE RECENTLY DEVELOPED ALONG THIS BOUNDARY
AND SHOULD CONTINUE TO EVOLVE OVER THE NEXT FEW HOURS AS LARGE SCALE
FORCING/WIND SHIFT ENCOUNTER INCREASINGLY BUOYANT AIRMASS.  LATEST
DIAGNOSTIC FIELDS SUGGEST MUCAPE VALUES ON THE ORDER OF 2000J/KG
ACROSS THIS REGION WITH SUFFICIENT SHEAR TO SUPPORT STRONG-ISOLATED
SEVERE MULTI-CELL UPDRAFTS.  PROXIMITY TO COAST AND MARGINALITY OF
EVENT WILL PRECLUDE WATCH ISSUANCE AT THIS TIME.

..DARROW.. 06/05/2006

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

ATTN...WFO...MHX...RAH...ILM...CHS...CAE...JAX...

31578236 32698154 33817988 34507901 35507746 34827604
31118060

Nearby

Mesoscale Discussions in North Carolina, 2006 Mesoscale Discussions in South Carolina, 2006 Mesoscale Discussions in Georgia, 2006 Every mesoscale discussion in 2006

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.