Alert archive / North Carolina / Mesoscale Discussions in 2011

Mesoscale Discussion 2265

October 19, 201115 counties in North Carolina

The Storm Prediction Center issued this mesoscale discussion at Oct 19, 2011, 10:50 AM EDT for 15 counties in North Carolina. It was in force for 85 min.

The area

The outline as issued.

The facts

Issued
Oct 19, 2011, 10:50 AM EDT (14:50 UTC)
Expired
Oct 19, 2011, 12:15 PM EDT
In force
85 min
Issued by
the Storm Prediction Center

Counties Beaufort County, NC, Camden County, NC, Carteret County, NC, Craven County, NC, Currituck County, NC, Dare County, NC, Hyde County, NC, Jones County, NC, Onslow County, NC, Pamlico County, NC, Pasquotank County, NC, Pender County, NC, Perquimans County, NC, Tyrrell County, NC, Washington County, NC

The radar

The Morehead City radar (KMHX), 56 km from the middle of the area, began a volume at 14:51 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, 2.8 hours before the alert went out and 316 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, Greensboro/Hi Pt, NC at 12:00Z on 2011-10-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLEL10008507005003002001001 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, Greensboro/Hi Pt, NC at 12:00Z on 2011-10-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 142 square meters per square second.1939587897117Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
525 m above ground
0-6 km bulk shear
68 kt
0-1 km storm-relative helicity
142 m²/s²
0-3 km storm-relative helicity
192 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

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
Oct 19, 3:46 PM EDTMesoscale DiscussionSPCBladen, Brunswick, Columbus, Craven, Duplin, Greene and 8 more89 min
Oct 19, 6:26 PM EDTMesoscale DiscussionSPCBeaufort, Bertie, Bladen, Camden, Carteret, Chowan and 34 more2 hr

Nearby

Mesoscale Discussions in North Carolina, 2011Every 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.