Alert archive / North Carolina / Mesoscale Discussions in 2019

Mesoscale Discussion 308

April 12, 201918 counties in North Carolina; 4 counties in South Carolina; City of Danville, Virginia

The Storm Prediction Center issued this mesoscale discussion at Apr 12, 2019, 1:34 PM EDT for 18 counties in North Carolina; 4 counties in South Carolina; City of Danville, Virginia. It was in force for 116 min.

The area

The outline as issued.

The facts

Issued
Apr 12, 2019, 1:34 PM EDT (17:34 UTC)
Expired
Apr 12, 2019, 3:30 PM EDT
In force
116 min
Issued by
the Storm Prediction Center
Chance of a watch
5%
All 23 counties

Alamance County, NC, Anson County, NC, Caswell County, NC, Chatham County, NC, Davidson County, NC, Durham County, NC, Guilford County, NC, Hoke County, NC, Lee County, NC, Montgomery County, NC, Moore County, NC, Orange County, NC, Person County, NC, Randolph County, NC, Richmond County, NC, Rockingham County, NC, Scotland County, NC, Stanly County, NC, Chesterfield County, SC, Darlington County, SC, Florence County, SC, Marlboro County, SC, City of Danville, VA

The radar

The Raleigh/Durham radar (KRAX), 113 km from the middle of the area, began a volume at 17:38 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, 5.6 hours before the alert went out and 264 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 2019-04-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2019-04-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 41 square meters per square second.1939Sfc1 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
951 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
41 m²/s²
0-3 km storm-relative helicity
86 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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Nearby

Mesoscale Discussions in North Carolina, 2019Mesoscale Discussions in South Carolina, 2019Mesoscale Discussions in Virginia, 2019Every mesoscale discussion in 2019

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.