Alert archive / West Virginia / Mesoscale Discussions in 2003
Mesoscale Discussion 929
The Storm Prediction Center issued this mesoscale discussion at May 10, 2003, 9:28 PM EDT for 7 counties in Kentucky; 12 counties in West Virginia. It was in force for 62 min.
The area
The outline as issued.
The facts
- Issued
- May 10, 2003, 9:28 PM EDT (01:28 UTC)
- Expired
- May 10, 2003, 10:30 PM EDT
- In force
- 62 min
- Issued by
- the Storm Prediction Center
Counties Breathitt County, KY, Floyd County, KY, Johnson County, KY, Knott County, KY, Magoffin County, KY, Martin County, KY, Pike County, KY, Boone County, WV, Clay County, WV, Fayette County, WV, Kanawha County, WV, Lincoln County, WV, Logan County, WV, Mingo County, WV, Nicholas County, WV, Raleigh County, WV, Summers County, WV, Wayne County, WV, Wyoming County, WV
The radar
The Charleston,WV radar (KRLX), 75 km from the middle of the area, began a volume at 01:29 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
Cncnati-Daytn, OH (KILN), launched 00:00Z, 1.5 hours before the alert went out and 230 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
- 1265 J/kg
- Mixed-layer CIN
- -64 J/kg
- Mixed-layer LCL
- 897 m above ground
- 0-6 km bulk shear
- 71 kt
- 0-1 km storm-relative helicity
- 411 m²/s²
- 0-3 km storm-relative helicity
- 392 m²/s²
- Significant tornado parameter
- 3.2
- Supercell composite
- 17.0
The text
As transmitted, in the capitals the NWS used until 2016.
543 ACUS11 KWNS 110128 SWOMCD SPC MCD 110128 WVZ000-VAZ000-KYZ000-110230- MESOSCALE DISCUSSION 0929 NWS STORM PREDICTION CENTER NORMAN OK 0828 PM CDT SAT MAY 10 2003 AREAS AFFECTED...NERN KY...AND SRN/SWRN WV CONCERNING...TORNADO WATCH 343... VALID 110128Z - 110230Z CONVECTIVE INTENSITY ACROSS WW 343 CONTINUES TO DECREASE OWING TO BOUNDARY LAYER STABILIZATION LATE THIS EVENING. DECOUPLING APPEARS TO HAVE WEAKENED SWLY FEED OF MOIST/UNSTABLE AIR WHICH HAD SUSTAINED STORMS AT SEVERE INTENSITY EARLIER IN THE EVENING ACROSS SWRN WV AND NERN KY. A MARGINAL HAIL/WIND THREAT EXISTS AT 0125Z WITH ISOLATED STORM 25 SSW OF RLX...WHICH CONTINUES TO TRACK EWD. HOWEVER...TORNADO WATCH 343 MAY BE CANCELLED EARLY IF PRESENT DOWNWARD TREND IN CONVECTIVE INTENSITY CONTINUES ACROSS THE WATCH AREA. ..BANACOS.. 05/11/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...RNK...RLX...JKL... 37298323 37528344 38398228 38668055 37458065
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 10, 8:06 PM EDT | Mesoscale Discussion | SPC | Ballard, Calloway, Carlisle, Crittenden, Fulton, Graves and 5 more | 54 min |
| May 10, 9:45 PM EDT | Tornado Watch | SPC | Ballard, Carlisle, Fulton, Graves, Hickman, Livingston and 2 more | 5 hr |
| May 10, 10:10 PM EDT | Tornado Watch | SPC | Oldham | 5 hr |
| May 10, 11:04 PM EDT | Mesoscale Discussion | SPC | Allen, Barren, Breckinridge, Butler, Caldwell, Calloway and 23 more | 116 min |
| May 11, 12:20 AM EDT | Tornado Watch | SPC | Adair, Allen, Anderson, Barren, Bourbon, Boyle and 38 more | 6 hr |
| May 11, 12:28 AM EDT | Mesoscale Discussion | SPC | Boone, Bracken, Campbell, Carroll, Gallatin, Grant and 2 more | 2 hr |
| May 11, 2:46 AM EDT | Mesoscale Discussion | SPC | Allen, Anderson, Barren, Bourbon, Boyle, Breckinridge and 46 more | 89 min |
| May 11, 5:16 AM EDT | Mesoscale Discussion | SPC | Adair, Anderson, Barren, Bath, Bell, Bourbon and 68 more | 59 min |
| May 11, 6:05 AM EDT | Severe Thunderstorm Watch | SPC | Bath, Bell, Bourbon, Boyle, Breathitt, Casey and 38 more | 4 hr |
| May 11, 6:55 AM EDT | Severe Thunderstorm Watch | SPC | Bell, Harlan | 5 hr |
| May 11, 10:30 AM EDT | Mesoscale Discussion | SPC | Brooke, Doddridge, Hancock, Harrison, Marion, Marshall and 9 more | 2 hr |
| May 11, 11:45 AM EDT | Tornado Watch | SPC | Brooke, Hancock, Marshall, Monongalia, Ohio, Wetzel | 5 hr |
| May 11, 2:52 PM EDT | Mesoscale Discussion | SPC | Brooke, Hancock, Marshall, Monongalia, Ohio, Wetzel | 113 min |
| May 11, 3:18 PM EDT | Mesoscale Discussion | SPC | Berkeley, Jefferson, Morgan | 117 min |
Nearby
Mesoscale Discussions in West Virginia, 2003Mesoscale Discussions in Kentucky, 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.