Alert archive / North Carolina / Mesoscale Discussions in 2005

Mesoscale Discussion 1690

July 7, 200521 counties in North Carolina; Cherokee County, Spartanburg County, South Carolina; 4 counties in Virginia

The Storm Prediction Center issued this mesoscale discussion at Jul 7, 2005, 12:33 PM EDT for 21 counties in North Carolina; Cherokee County, Spartanburg County, South Carolina; 4 counties in Virginia. It was in force for 117 min.

The area

The outline as issued.

The facts

Issued
Jul 7, 2005, 12:33 PM EDT (16:33 UTC)
Expired
Jul 7, 2005, 2:30 PM EDT
In force
117 min
Issued by
the Storm Prediction Center
All 27 counties

Alexander County, NC, Burke County, NC, Caldwell County, NC, Caswell County, NC, Catawba County, NC, Cleveland County, NC, Davidson County, NC, Davie County, NC, Forsyth County, NC, Gaston County, NC, Guilford County, NC, Iredell County, NC, Lincoln County, NC, Polk County, NC, Rockingham County, NC, Rowan County, NC, Rutherford County, NC, Stokes County, NC, Surry County, NC, Wilkes County, NC, Yadkin County, NC, Cherokee County, SC, Spartanburg County, SC, City of Danville, VA, City of Martinsville, VA, Henry County, VA, Patrick County, VA

The radar

The Roanoke radar (KFCX), 114 km from the middle of the area, began a volume at 16:37 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 4.6 hours before the alert went out and 80 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 2005-07-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 309 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, Greensboro/Hi Pt, NC at 12:00Z on 2005-07-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 74 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
309 J/kg
Mixed-layer CIN
-68 J/kg
Mixed-layer LCL
1315 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
74 m²/s²
0-3 km storm-relative helicity
170 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

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
Jul 7, 1:47 AM EDTMesoscale DiscussionSPCCherokee, Clay, Macon, Polk, Transylvania28 min
Jul 7, 3:10 AM EDTTornado WatchSPCCabarrus, Catawba, Cleveland, Davie, Gaston, Henderson and 8 more6 hr
Jul 7, 5:44 AM EDTMesoscale DiscussionSPCAlexander, Burke, Cabarrus, Catawba, Cleveland, Davie and 10 more91 min
Jul 7, 8:43 AM EDTMesoscale DiscussionSPCAlamance, Alexander, Anson, Burke, Cabarrus, Caldwell and 33 more32 min
Jul 7, 9:00 AM EDTTornado WatchSPCAlamance, Alexander, Burke, Cabarrus, Caldwell, Caswell and 27 more7 hr
Jul 7, 1:17 PM EDTMesoscale DiscussionSPCBertie, Chowan, Dare, Edgecombe, Halifax, Hertford and 8 more88 min
Jul 7, 2:05 PM EDTTornado WatchSPCBertie, Camden, Chowan, Currituck, Dare, Edgecombe and 14 more8 hr
Jul 7, 3:45 PM EDTTornado WatchSPCAlamance, Cabarrus, Caswell, Chatham, Davidson, Davie and 17 more6 hr
Jul 7, 4:47 PM EDTMesoscale DiscussionSPCHalifax, Northampton118 min
Jul 7, 6:01 PM EDTMesoscale DiscussionSPCBertie, Camden, Chatham, Chowan, Currituck, Dare and 20 more59 min

Nearby

Mesoscale Discussions in North Carolina, 2005Mesoscale Discussions in Virginia, 2005Mesoscale Discussions in South Carolina, 2005Every mesoscale discussion in 2005

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.