Alert archive / North Carolina / Mesoscale Discussions in 2014

Mesoscale Discussion 1264

July 3, 201413 counties in North Carolina

The Storm Prediction Center issued this mesoscale discussion at Jul 3, 2014, 4:09 PM EDT for 13 counties in North Carolina. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jul 3, 2014, 4:09 PM EDT (20:09 UTC)
Expired
Jul 3, 2014, 6:15 PM EDT
In force
2 hr
Issued by
the Storm Prediction Center

Counties Beaufort County, NC, Brunswick County, NC, Carteret County, NC, Craven County, NC, Dare County, NC, Hyde County, NC, Jones County, NC, New Hanover County, NC, Onslow County, NC, Pamlico County, NC, Pender County, NC, Tyrrell County, NC, Washington County, NC

The radar

The Morehead City radar (KMHX), 20 km from the middle of the area, began a volume at 20:12 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

Newport, NC (KMHX), launched 12:00Z, 8.2 hours before the alert went out and 20 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-pSkew-T log-p diagram, Newport, NC at 12:00Z on 2014-07-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1772 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Newport, NC at 12:00Z on 2014-07-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 75 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1772 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
745 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
75 m²/s²
0-3 km storm-relative helicity
79 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.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 3, 11:31 AM EDTMesoscale DiscussionSPCCarteret, New Hanover, Onslow, Pender2 hr
Jul 3, 1:24 PM EDTTornado WatchSPCBeaufort, Brunswick, Carteret, Craven, Dare, Duplin and 12 more8 hr

Nearby

Mesoscale Discussions in North Carolina, 2014Every mesoscale discussion in 2014

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.