Alert archive / North Carolina / Mesoscale Discussions in 2014

Mesoscale Discussion 1897

October 15, 20147 counties in North Carolina

The Storm Prediction Center issued this mesoscale discussion at Oct 15, 2014, 12:48 AM EDT for 7 counties in North Carolina. It was in force for 57 min.

The area

The outline as issued.

The facts

Issued
Oct 15, 2014, 12:48 AM EDT (04:48 UTC)
Expired
Oct 15, 2014, 1:45 AM EDT
In force
57 min
Issued by
the Storm Prediction Center
Chance of a watch
20%

Counties Beaufort County, NC, Bertie County, NC, Carteret County, NC, Craven County, NC, Martin County, NC, Pamlico County, NC, Washington County, NC

The radar

The Morehead City radar (KMHX), 36 km from the middle of the area, began a volume at 04:51 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

Newport, NC (KMHX), launched 00:00Z, 4.8 hours before the alert went out and 36 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 00:00Z on 2014-10-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 534 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 00:00Z on 2014-10-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 158 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
534 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
790 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
158 m²/s²
0-3 km storm-relative helicity
164 m²/s²
Significant tornado parameter
0.3
Supercell composite
1.9

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 14, 9:24 PM EDTMesoscale DiscussionSPCAlexander, Alleghany, Ashe, Avery, Burke, Caldwell and 15 more66 min
Oct 15, 5:14 AM EDTMesoscale DiscussionSPCBertie, Edgecombe, Franklin, Halifax, Hertford, Johnston and 5 more3 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.