Alert archive / North Carolina / Mesoscale Discussions in 2003

Mesoscale Discussion 1768

July 10, 2003Fannin County, Murray County, Towns County, Georgia; 18 counties in North Carolina; 11 counties in Tennessee

The Storm Prediction Center issued this mesoscale discussion at Jul 10, 2003, 7:53 PM EDT for Fannin County, Murray County, Towns County, Georgia; 18 counties in North Carolina; 11 counties in Tennessee. It was in force for 97 min.

The area

The outline as issued.

The facts

Issued: Jul 10, 2003, 7:53 PM EDT (23:53 UTC)
Expired: Jul 10, 2003, 9:30 PM EDT
In force: 97 min
Issued by: the Storm Prediction Center

All 32 counties

Fannin County, GA, Murray County, GA, Towns County, GA, Alleghany County, NC, Ashe County, NC, Avery County, NC, Buncombe County, NC, Cherokee County, NC, Clay County, NC, Graham County, NC, Haywood County, NC, Henderson County, NC, Jackson County, NC, Macon County, NC, Madison County, NC, McDowell County, NC, Mitchell County, NC, Swain County, NC, Transylvania County, NC, Watauga County, NC, Yancey County, NC, Carter County, TN, Cocke County, TN, Greene County, TN, Hamblen County, TN, Hawkins County, TN, Jefferson County, TN, Johnson County, TN, Sevier County, TN, Sullivan County, TN, Unicoi County, TN, Washington County, TN

The radar

The Knoxville radar (KMRX), 41 km from the middle of the area, began a volume at 23:53 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 12:00Z, 11.9 hours before the alert went out and 286 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: 117 J/kg
Mixed-layer CIN: -102 J/kg
Mixed-layer LCL: 1108 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 55 m²/s²
0-3 km storm-relative helicity: 88 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
Jul 10, 10:20 AM EDT	Mesoscale Discussion	SPC	Banks, Barrow, Catoosa, Cherokee, Clarke, Dawson and 26 more	85 min
Jul 10, 11:20 AM EDT	Severe Thunderstorm Watch	SPC	Baldwin, Banks, Barrow, Bartow, Burke, Butts and 58 more	7 hr
Jul 10, 12:55 PM EDT	Severe Thunderstorm Watch	SPC	Carroll, Catoosa, Chattooga, Dade, Floyd, Haralson and 4 more	5 hr
Jul 10, 2:33 PM EDT	Mesoscale Discussion	SPC	Baldwin, Banks, Barrow, Bartow, Burke, Butts and 66 more	117 min
Jul 10, 5:38 PM EDT	Mesoscale Discussion	SPC	Banks, Bartow, Catoosa, Chattooga, Cherokee, Cobb and 27 more	37 min
Jul 9, 9:23 PM EDT	Mesoscale Discussion	SPC	Beaufort, Bertie, Camden, Chowan, Cumberland, Currituck and 15 more	97 min
Jul 10, 5:50 PM EDT	Severe Thunderstorm Watch	SPC	Alleghany, Ashe, Avery, Buncombe, Cherokee, Clay and 11 more	4 hr
Jul 10, 11:23 AM EDT	Mesoscale Discussion	SPC	Bedford, Cannon, Cheatham, Clay, Coffee, Davidson and 33 more	97 min

Nearby

Mesoscale Discussions in North Carolina, 2003 Mesoscale Discussions in Tennessee, 2003 Mesoscale Discussions in Georgia, 2003 Every mesoscale discussion in 2003

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.