Alert archive / North Carolina / Mesoscale Discussions in 2007

Mesoscale Discussion 498

April 15, 200727 counties in North Carolina; 9 counties in South Carolina

The Storm Prediction Center issued this mesoscale discussion at Apr 15, 2007, 3:33 AM EDT for 27 counties in North Carolina; 9 counties in South Carolina. It was in force for 87 min.

The area

The outline as issued.

The facts

Issued
Apr 15, 2007, 3:33 AM EDT (07:33 UTC)
Expired
Apr 15, 2007, 5:00 AM EDT
In force
87 min
Issued by
the Storm Prediction Center
All 36 counties

Alamance County, NC, Anson County, NC, Cabarrus County, NC, Chatham County, NC, Cumberland County, NC, Davidson County, NC, Durham County, NC, Franklin County, NC, Granville County, NC, Guilford County, NC, Harnett 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, Robeson County, NC, Rockingham County, NC, Rowan County, NC, Scotland County, NC, Stanly County, NC, Union County, NC, Vance County, NC, Wake County, NC, Chesterfield County, SC, Darlington County, SC, Fairfield County, SC, Kershaw County, SC, Lancaster County, SC, Lee County, SC, Lexington County, SC, Marlboro County, SC, Richland County, SC

The radar

The Columbia radar (KCAE), 142 km from the middle of the area, began a volume at 07:35 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 00:00Z, 7.6 hours before the alert went out and 126 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 00:00Z on 2007-04-15Temperature 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, Greensboro/Hi Pt, NC at 00:00Z on 2007-04-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 163 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
1440 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
163 m²/s²
0-3 km storm-relative helicity
561 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
Apr 14, 10:10 PM EDTMesoscale DiscussionSPCAnson, Union95 min
Apr 15, 2:01 AM EDTTornado WatchSPCBladen, Brunswick, Columbus, New Hanover, Pender, Robeson7 hr
Apr 15, 7:39 AM EDTMesoscale DiscussionSPCBeaufort, Bladen, Brunswick, Chatham, Columbus, Craven and 26 more66 min
Apr 15, 8:08 AM EDTTornado WatchSPCBeaufort, Bladen, Brunswick, Carteret, Columbus, Craven and 29 more7 hr
Apr 15, 11:15 AM EDTMesoscale DiscussionSPCBeaufort, Bertie, Bladen, Brunswick, Camden, Carteret and 37 more2 hr
Apr 15, 12:19 PM EDTMesoscale DiscussionSPCAlamance, Alexander, Anson, Cabarrus, Caswell, Catawba and 29 more86 min
Apr 15, 12:42 PM EDTTornado WatchSPCAlamance, Alexander, Anson, Bertie, Burke, Cabarrus and 44 more7 hr
Apr 15, 2:40 PM EDTMesoscale DiscussionSPCBeaufort, Bladen, Brunswick, Carteret, Columbus, Craven and 19 more65 min
Apr 15, 2:50 PM EDTTornado WatchSPCBeaufort, Carteret, Craven, Cumberland, Dare, Duplin and 14 more5 hr
Apr 15, 4:12 PM EDTMesoscale DiscussionSPCAlamance, Beaufort, Bertie, Camden, Carteret, Chatham and 41 more2 hr
Apr 15, 3:57 AM EDTMesoscale DiscussionSPCAiken, Allendale, Bamberg, Barnwell, Beaufort, Berkeley and 12 more93 min
Apr 15, 10:20 AM EDTMesoscale DiscussionSPCJasper55 min

Nearby

Mesoscale Discussions in North Carolina, 2007Mesoscale Discussions in South Carolina, 2007Every mesoscale discussion in 2007

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.