Alert archive / Tennessee / Mesoscale Discussions in 2004
Mesoscale Discussion 935
The Storm Prediction Center issued this mesoscale discussion at May 27, 2004, 3:28 AM EDT for 12 counties in North Carolina; 17 counties in Tennessee; 8 counties in Virginia. It was in force for 92 min.
The area
The outline as issued.
The facts
- Issued
- May 27, 2004, 3:28 AM EDT (07:28 UTC)
- Expired
- May 27, 2004, 5:00 AM EDT
- In force
- 92 min
- Issued by
- the Storm Prediction Center
All 37 counties
Alexander County, NC, Alleghany County, NC, Ashe County, NC, Avery County, NC, Burke County, NC, Caldwell County, NC, Haywood County, NC, Madison County, NC, Mitchell County, NC, Watauga County, NC, Wilkes County, NC, Yancey County, NC, Campbell County, TN, Carter County, TN, Claiborne County, TN, Cocke County, TN, Grainger County, TN, Greene County, TN, Hamblen County, TN, Hancock County, TN, Hawkins County, TN, Jefferson County, TN, Johnson County, TN, Knox County, TN, Sevier County, TN, Sullivan County, TN, Unicoi County, TN, Union County, TN, Washington County, TN, City of Bristol, VA, City of Norton, VA, Grayson County, VA, Lee County, VA, Russell County, VA, Scott County, VA, Smyth County, VA, Washington County, VA
The radar
The Knoxville radar (KMRX), 87 km from the middle of the area, began a volume at 07:29 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, 7.5 hours before the alert went out and 234 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.
- Mixed-layer CAPE
- 946 J/kg
- Mixed-layer CIN
- -32 J/kg
- Mixed-layer LCL
- 1550 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- 122 m²/s²
- 0-3 km storm-relative helicity
- 148 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 5.3
The text
As transmitted, in the capitals the NWS used until 2016.
134 ACUS11 KWNS 270728 SWOMCD SPC MCD 270728 NCZ000-VAZ000-TNZ000-KYZ000-270900- MESOSCALE DISCUSSION 0935 NWS STORM PREDICTION CENTER NORMAN OK 0228 AM CDT THU MAY 27 2004 AREAS AFFECTED...EXTREME SERN KY...EXTREME SWRN VA...EXTREME NWRN NC...PORTIONS NERN TN CONCERNING...SEVERE THUNDERSTORM POTENTIAL VALID 270728Z - 270900Z LINE OF TSTMS SHOULD MOVE ACROSS HIGHEST TERRAIN INVOF VA/KY BORDER BY 8Z WITH POTENTIAL FOR OCCASIONAL DAMAGING GUSTS -- ESPECIALLY ON NW-FACING SLOPES OF RIDGES. ACTIVITY IS EXPECTED TO WEAKEN THEREAFTER BUT MAINTAIN SOME STRONG -- POSSIBLY DAMAGING -- WIND POTENTIAL SSEWD INTO MOUNTAINS OF TN/NC BORDER REGION. WW NOT ANTICIPATED BECAUSE OF SMALL AREA AFFECTED AND FCST WEAKENING TREND. FORWARD-PROPAGATION AND FORCED ASCENT ALONG LEADING OUTFLOW SLOPE IS HELPING TO MAINTAIN THIS ACTIVITY DESPITE MARGINAL BUOYANCY -- ELEVATED MUCAPE LESS THAN 500 J/KG -- AND RELATIVELY STABLE LAYER OF 50S/LOW 60S SFC TEMPS. COMPLEX WILL CONTINUE TO MOVE INTO PROGRESSIVELY MORE STABLE AIR MASS AND SHOULD WEAKEN ACROSS MOUNTAINOUS AREA OF NERN TN/NWRN NC. ..EDWARDS.. 05/27/2004 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...RNK...RLX...GSP...MRX...JKL... 36668436 36758345 37048217 37098169 36848117 36258071 35918090 35778144 35558300 35828399
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 26, 9:15 PM EDT | Severe Thunderstorm Watch | SPC | Beaufort, Bertie, Camden, Chowan, Currituck, Edgecombe and 13 more | 5 hr |
| May 26, 9:40 PM EDT | Mesoscale Discussion | SPC | Anson, Haywood, Henderson, Jackson, Polk, Transylvania and 1 more | 65 min |
| May 26, 11:21 PM EDT | Mesoscale Discussion | SPC | Beaufort, Camden, Chowan, Currituck, Pasquotank, Perquimans and 2 more | 54 min |
| May 26, 8:57 PM EDT | Mesoscale Discussion | SPC | Macon, Montgomery, Robertson, Sumner | 63 min |
| May 26, 8:19 PM EDT | Mesoscale Discussion | SPC | Amelia, Arlington, Brunswick, Caroline, Charles City, Charlotte and 33 more | 116 min |
| May 27, 3:07 PM EDT | Mesoscale Discussion | SPC | Albemarle, Arlington, Augusta, Buckingham, Caroline, Clarke and 42 more | 113 min |
Nearby
Mesoscale Discussions in Tennessee, 2004Mesoscale Discussions in North Carolina, 2004Mesoscale Discussions in Virginia, 2004Every mesoscale discussion in 2004
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.