Alert archive / Tennessee / Mesoscale Discussions in 2003

Mesoscale Discussion 1764

July 10, 20037 states

The Storm Prediction Center issued this mesoscale discussion at Jul 10, 2003, 4:38 PM CDT for 7 states. It was in force for 37 min.

The area

The outline as issued.

The facts

Issued
Jul 10, 2003, 4:38 PM CDT (21:38 UTC)
Expired
Jul 10, 2003, 5:15 PM CDT
In force
37 min
Issued by
the Storm Prediction Center
All 99 counties

Cherokee County, AL, Cleburne County, AL, Banks County, GA, Bartow County, GA, Catoosa County, GA, Chattooga County, GA, Cherokee County, GA, Cobb County, GA, Dade County, GA, Dawson County, GA, DeKalb County, GA, Douglas County, GA, Fannin County, GA, Floyd County, GA, Forsyth County, GA, Franklin County, GA, Fulton County, GA, Gilmer County, GA, Gordon County, GA, Gwinnett County, GA, Habersham County, GA, Hall County, GA, Haralson County, GA, Lumpkin County, GA, Murray County, GA, Paulding County, GA, Pickens County, GA, Polk County, GA, Rabun County, GA, Stephens County, GA, Towns County, GA, Union County, GA, Walker County, GA, White County, GA, Whitfield County, GA, Bell County, KY, Ashe County, NC, Avery County, NC, Buncombe County, NC, Burke County, NC, Caldwell 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, Polk County, NC, Rutherford County, NC, Swain County, NC, Transylvania County, NC, Watauga County, NC, Yancey County, NC, Greenville County, SC, Oconee County, SC, Pickens County, SC, Anderson County, TN, Bledsoe County, TN, Blount County, TN, Bradley County, TN, Campbell County, TN, Carter County, TN, Claiborne County, TN, Cocke County, TN, Cumberland County, TN, Grainger County, TN, Greene County, TN, Grundy County, TN, Hamblen County, TN, Hamilton County, TN, Hancock County, TN, Hawkins County, TN, Jefferson County, TN, Johnson County, TN, Knox County, TN, Loudon County, TN, Marion County, TN, McMinn County, TN, Meigs County, TN, Monroe County, TN, Morgan County, TN, Polk County, TN, Rhea County, TN, Roane County, TN, Scott County, TN, Sequatchie County, TN, Sevier County, TN, Sullivan County, TN, Unicoi County, TN, Union County, TN, Van Buren County, TN, Washington County, TN, City of Bristol, VA, Lee County, VA, Scott County, VA

The radar

The Knoxville radar (KMRX), 71 km from the middle of the area, began a volume at 21:38 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

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 9.6 hours before the alert went out and 257 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, Peachtre/Fal Fld, GA at 12:00Z on 2003-07-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1832 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, Peachtre/Fal Fld, GA at 12:00Z on 2003-07-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 66 square meters per square second.1939Sfc1 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
1832 J/kg
Mixed-layer CIN
-18 J/kg
Mixed-layer LCL
694 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
66 m²/s²
0-3 km storm-relative helicity
76 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.5

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 10, 10:23 AM CDTMesoscale DiscussionSPCColbert, Franklin, Lauderdale, Lawrence, Limestone, Madison and 1 more97 min
Jul 10, 11:55 AM CDTSevere Thunderstorm WatchSPCBibb, Blount, Calhoun, Chambers, Cherokee, Clay and 22 more5 hr
Jul 10, 1:33 PM CDTMesoscale DiscussionSPCBibb, Blount, Calhoun, Cherokee, Clay, Cleburne and 21 more117 min
Jul 10, 9:20 AM CDTMesoscale DiscussionSPCBanks, Barrow, Catoosa, Cherokee, Clarke, Dawson and 26 more85 min
Jul 10, 10:20 AM CDTSevere Thunderstorm WatchSPCBaldwin, Banks, Barrow, Bartow, Burke, Butts and 58 more7 hr
Jul 10, 6:53 PM CDTMesoscale DiscussionSPCFannin, Murray, Towns97 min
Jul 9, 8:20 PM CDTSevere Thunderstorm WatchSPCOldham6 hr
Jul 10, 11:13 AM CDTMesoscale DiscussionSPCAnderson, Bath, Boone, Bourbon, Boyle, Bracken and 47 more2 hr
Jul 10, 11:30 AM CDTSevere Thunderstorm WatchSPCAdair, Allen, Anderson, Barren, Bath, Boone and 80 more6 hr
Jul 10, 1:23 PM CDTMesoscale DiscussionSPCAdair, Allen, Anderson, Barren, Bath, Bourbon and 74 more97 min
Jul 10, 2:45 PM CDTSevere Thunderstorm WatchSPCBell, Breathitt, Clay, Floyd, Harlan, Johnson and 10 more6 hr
Jul 9, 8:23 PM CDTMesoscale DiscussionSPCBeaufort, Bertie, Camden, Chowan, Cumberland, Currituck and 15 more97 min
Jul 10, 4:50 PM CDTSevere Thunderstorm WatchSPCAlleghany, Ashe, Avery, Buncombe, Cherokee, Clay and 11 more4 hr
Jul 10, 5:25 PM CDTMesoscale DiscussionSPCAlbemarle, Alleghany, Amelia, Amherst, Appomattox, Augusta and 51 more65 min
Jul 10, 5:50 PM CDTSevere Thunderstorm WatchSPCAlbemarle, Alleghany, Amherst, Appomattox, Augusta, Bath and 52 more6 hr
Jul 10, 5:57 PM CDTMesoscale DiscussionSPCBland, Buchanan, Dickenson, Highland, Lee, Russell and 7 more93 min

Nearby

Mesoscale Discussions in Tennessee, 2003Mesoscale Discussions in Georgia, 2003Mesoscale Discussions in North Carolina, 2003Every 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.