Alert archive / Kentucky / Mesoscale Discussions in 2021
Mesoscale Discussion 1004
The Storm Prediction Center issued this mesoscale discussion at Jun 18, 2021, 11:09 PM EDT for 9 counties in Kentucky; Wayne County, West Virginia. It was in force for 96 min.
The area
The outline as issued.
The facts
- Issued
- Jun 18, 2021, 11:09 PM EDT (03:09 UTC)
- Expired
- Jun 19, 2021, 12:45 AM EDT
- In force
- 96 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe thunderstorm watch 281
Counties Bath County, KY, Boyd County, KY, Carter County, KY, Elliott County, KY, Fleming County, KY, Lawrence County, KY, Menifee County, KY, Morgan County, KY, Rowan County, KY, Wayne County, WV
The radar
The Jackson,KY radar (KJKL), 70 km from the middle of the area, began a volume at 03:10 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, 3.2 hours before the alert went out and 148 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
- 2257 J/kg
- Mixed-layer CIN
- -56 J/kg
- Mixed-layer LCL
- 1236 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 214 m²/s²
- 0-3 km storm-relative helicity
- 240 m²/s²
- Significant tornado parameter
- 1.9
- Supercell composite
- 17.6
The text
As transmitted.
973
ACUS11 KWNS 190309
SWOMCD
SPC MCD 190309
WVZ000-OHZ000-KYZ000-190445-
Mesoscale Discussion 1004
NWS Storm Prediction Center Norman OK
1009 PM CDT Fri Jun 18 2021
Areas affected...northeast KY...far western WV
Concerning...Severe Thunderstorm Watch 281...
Valid 190309Z - 190445Z
The severe weather threat for Severe Thunderstorm Watch 281
continues.
SUMMARY...A bowing segment will move south and may require a local
watch extension for damaging wind potential beyond the current valid
area of Severe Thunderstorm Watch 281.
DISCUSSION...A pronounced bowing segment with a history of severe
winds continues to move south at 45-50 mph across extreme northeast
KY. Although MUCAPE decreases with southward extent, current
indications are that the linear thunderstorm complex will likely
continue to pose a severe risk beyond the current area covered by WW
281, and a local areal extension may be needed.
..Bunting.. 06/19/2021
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...RLX...JKL...ILN...LMK...
LAT...LON 38078390 38268398 38488360 38468299 38418260 38388243
38298235 38078238 37858275 37898365 38078390SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 18, 8:53 PM EDT | Mesoscale Discussion | SPC | Boone, Boyd, Bracken, Campbell, Carroll, Carter and 18 more | 67 min |
| Jun 18, 9:09 PM EDT | Severe Thunderstorm Watch | SPC | Bath, Boone, Bourbon, Boyd, Bracken, Breathitt and 32 more | 6 hr |
| Jun 19, 7:07 PM EDT | Mesoscale Discussion | SPC | Brooke, Hancock | 83 min |
Nearby
Mesoscale Discussions in Kentucky, 2021Mesoscale Discussions in West Virginia, 2021Every mesoscale discussion in 2021
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.