Alert archive / North Carolina / Mesoscale Discussions in 2008
Mesoscale Discussion 849
The Storm Prediction Center issued this mesoscale discussion at May 9, 2008, 11:37 PM EDT for 28 counties in North Carolina; 6 counties in South Carolina; 5 counties in Tennessee. It was in force for 53 min.
The area
The outline as issued.
The facts
- Issued
- May 9, 2008, 11:37 PM EDT (03:37 UTC)
- Expired
- May 10, 2008, 12:30 AM EDT
- In force
- 53 min
- Issued by
- the Storm Prediction Center
All 39 counties
Alexander County, NC, Buncombe County, NC, Burke County, NC, Cabarrus County, NC, Caldwell County, NC, Catawba County, NC, Cherokee County, NC, Clay County, NC, Cleveland County, NC, Davie County, NC, Gaston County, NC, Graham County, NC, Haywood County, NC, Henderson County, NC, Iredell County, NC, Jackson County, NC, Lincoln County, NC, Macon County, NC, Madison County, NC, McDowell County, NC, Mecklenburg County, NC, Mitchell County, NC, Polk County, NC, Rowan County, NC, Rutherford County, NC, Swain County, NC, Transylvania County, NC, Yancey County, NC, Cherokee County, SC, Greenville County, SC, Lancaster County, SC, Pickens County, SC, Spartanburg County, SC, York County, SC, Blount County, TN, Cocke County, TN, Jefferson County, TN, Monroe County, TN, Sevier County, TN
The radar
The Greer radar (KGSP), 89 km from the middle of the area, began a volume at 03:37 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 nearest sounding before it
Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 3.6 hours before the alert went out and 266 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
- 189 J/kg
- Mixed-layer CIN
- -195 J/kg
- Mixed-layer LCL
- 1560 m above ground
- 0-6 km bulk shear
- 67 kt
- 0-1 km storm-relative helicity
- 171 m²/s²
- 0-3 km storm-relative helicity
- 218 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 ACUS11 KWNS 100337 SWOMCD SPC MCD 100337 NCZ000-SCZ000-TNZ000-GAZ000-100430- MESOSCALE DISCUSSION 0849 NWS STORM PREDICTION CENTER NORMAN OK 1037 PM CDT FRI MAY 09 2008 AREAS AFFECTED...FAR ERN TN...WRN NC CONCERNING...SEVERE THUNDERSTORM WATCH 290... VALID 100337Z - 100430Z THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 290 CONTINUES. OVERALL WEAKENING TREND CONTINUES AS MAIN CONVECTION SPREADS ACROSS THE MOUNTAINS...WITH SVR THREAT APPARENTLY ENDING OVER ERN TN. HOWEVER...ENVIRONMENT EAST OF THE HIGHER TERRAIN MAY SUPPORT RENEWED DEVELOPMENT/INTENSIFICATION AS THUNDERSTORMS SPREAD INTO THE WRN NC AND FAR NWRN SC. CONTINUE VALID PORTIONS OF WW. MUCAPE AROUND 500 J/KG IS CURRENTLY IN PLACE ACROSS WW WITH EFFECTIVE SHEAR AROUND 40 KT. SURFACE PARCELS APPEAR TO BE CAPPED LATE THIS EVENING...ALTHOUGH EVENING SOUNDINGS INDICATE REGION REMAINS UNDER VERY STEEP ELEVATED MIXED-LAYER WITH H7-H5 LAPSE RATES IN EXCESS OF 7.5-8 C/KM. IN ADDITION REGION IS LIKELY BEING IMPACTED BY SHORTWAVE TROUGH MOVING ACROSS THE CENTRAL APPALACHIANS ATTM. POTENTIAL WILL REMAIN FOR STRONGER CORES TO REINTENSIFY OR NEW DEVELOPMENT TO OCCUR AS TAIL END OF DEEPER ASCENT OVERSPREADS EAST OF THE HIGHER TERRAIN WITH PRIMARY THREAT OF LARGE HAIL. ..EVANS.. 05/10/2008 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...RAH...RNK...CAE...GSP...MRX...FFC... 35008447 35628429 36168353 35978043 34658058
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 9, 8:55 PM EDT | Severe Thunderstorm Watch | SPC | Alexander, Avery, Buncombe, Burke, Cabarrus, Caldwell and 24 more | 4 hr |
| May 9, 10:41 PM EDT | Mesoscale Discussion | SPC | Anson, Bladen, Carteret, Chatham, Craven, Cumberland and 23 more | 64 min |
| May 9, 11:08 PM EDT | Severe Thunderstorm Watch | SPC | Alamance, Anson, Beaufort, Carteret, Chatham, Craven and 40 more | 4 hr |
| May 10, 2:02 AM EDT | Mesoscale Discussion | SPC | Alamance, Beaufort, Carteret, Chatham, Craven, Cumberland and 21 more | 88 min |
| May 10, 5:25 AM EDT | Mesoscale Discussion | SPC | Aiken, Allendale, Bamberg, Barnwell, Calhoun, Colleton and 8 more | 95 min |
| May 10, 12:28 PM EDT | Mesoscale Discussion | SPC | Allendale, Bamberg, Barnwell, Beaufort, Hampton, Jasper | 3 hr |
| May 10, 2:10 PM EDT | Tornado Watch | SPC | Aiken, Allendale, Bamberg, Barnwell, Beaufort, Berkeley and 8 more | 7 hr |
| May 10, 4:26 PM EDT | Mesoscale Discussion | SPC | Aiken, Allendale, Bamberg, Barnwell, Beaufort, Berkeley and 7 more | 2 hr |
| May 10, 5:05 AM EDT | Mesoscale Discussion | SPC | Bedford, Benton, Cannon, Carroll, Cheatham, Chester and 40 more | 115 min |
| May 10, 5:27 PM EDT | Tornado Watch | SPC | Chester, Crockett, Decatur, Dyer, Fayette, Gibson and 9 more | 10 hr |
| May 10, 7:22 PM EDT | Mesoscale Discussion | SPC | Fayette, Hardeman, Haywood, Lauderdale, McNairy, Madison and 2 more | 83 min |
Nearby
Mesoscale Discussions in North Carolina, 2008Mesoscale Discussions in South Carolina, 2008Mesoscale Discussions in Tennessee, 2008Every mesoscale discussion in 2008
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.