Alert archive / North Carolina / Mesoscale Discussions in 2013

Mesoscale Discussion 112

January 31, 2013Dare County, Hyde County, North Carolina

The Storm Prediction Center issued this mesoscale discussion at Jan 31, 2013, 3:40 AM EST for Dare County, Hyde County, North Carolina. It was in force for 65 min.

The area

The outline as issued.

The facts

Issued: Jan 31, 2013, 3:40 AM EST (08:40 UTC)
Expired: Jan 31, 2013, 4:45 AM EST
In force: 65 min
Issued by: the Storm Prediction Center

Counties Dare County, NC, Hyde County, NC

The radar

The Norfolk radar (KAKQ), 164 km from the middle of the area, began a volume at 08:40 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 00:00Z, 8.7 hours before the alert went out and 187 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: 20 J/kg
Mixed-layer CIN: -15 J/kg
Mixed-layer LCL: 649 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 364 m²/s²
0-3 km storm-relative helicity: 383 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.

Issued	Product	Office	Counties	Lasted
Jan 30, 7:09 PM EST	Mesoscale Discussion	SPC	Alleghany, Caswell, Forsyth, Guilford, Rockingham, Stokes and 3 more	66 min
Jan 30, 7:56 PM EST	Mesoscale Discussion	SPC	Alamance, Anson, Cabarrus, Chatham, Cumberland, Davidson and 28 more	94 min
Jan 30, 8:21 PM EST	Tornado Watch	SPC	Alamance, Anson, Bladen, Brunswick, Caswell, Chatham and 35 more	6 hr
Jan 30, 10:42 PM EST	Mesoscale Discussion	SPC	Bertie, Bladen, Chatham, Chowan, Columbus, Cumberland and 29 more	93 min
Jan 30, 11:59 PM EST	Tornado Watch	SPC	Beaufort, Bertie, Camden, Carteret, Chowan, Craven and 17 more	5 hr
Jan 31, 12:52 AM EST	Mesoscale Discussion	SPC	Beaufort, Bertie, Bladen, Brunswick, Camden, Chowan and 29 more	83 min

Nearby

Mesoscale Discussions in North Carolina, 2013 Every mesoscale discussion in 2013

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.