Alert archive / Indiana / Mesoscale Discussions in 2021
Mesoscale Discussion 1005
The Storm Prediction Center issued this mesoscale discussion at Jun 19, 2021, 1:02 AM EDT for 31 counties in Indiana. It was in force for 88 min.
The area
The outline as issued.
The facts
- Issued
- Jun 19, 2021, 1:02 AM EDT (05:02 UTC)
- Expired
- Jun 19, 2021, 2:30 AM EDT
- In force
- 88 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe thunderstorm watch 280
All 31 counties
Bartholomew County, IN, Boone County, IN, Brown County, IN, Clay County, IN, Clinton County, IN, Daviess County, IN, Decatur County, IN, Delaware County, IN, Fountain County, IN, Greene County, IN, Hamilton County, IN, Hancock County, IN, Hendricks County, IN, Henry County, IN, Jackson County, IN, Johnson County, IN, Lawrence County, IN, Madison County, IN, Marion County, IN, Martin County, IN, Monroe County, IN, Montgomery County, IN, Morgan County, IN, Owen County, IN, Parke County, IN, Putnam County, IN, Randolph County, IN, Rush County, IN, Shelby County, IN, Sullivan County, IN, Vigo County, IN
The radar
The Indianapolis radar (KIND), 30 km from the middle of the area, began a volume at 05:00 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, 5.0 hours before the alert went out and 208 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.
363
ACUS11 KWNS 190503
SWOMCD
SPC MCD 190502
INZ000-190630-
Mesoscale Discussion 1005
NWS Storm Prediction Center Norman OK
1202 AM CDT Sat Jun 19 2021
Areas affected...central IN
Concerning...Severe Thunderstorm Watch 280...
Valid 190502Z - 190630Z
The severe weather threat for Severe Thunderstorm Watch 280
continues.
SUMMARY...The severe weather threat continues for WW 280, and a
local watch extension may be needed to cover the short term
potential.
DISCUSSION...Latest mesoanalysis shows moderate buoyancy and ample
shear remaining in place across much of the watch area, with
strong/intermittently severe storms ongoing as of 0450z. Latest
high-res guidance suggests some severe threat will continue in the
short term, likely requiring a local watch extension beyond the 06z
scheduled expiration.
Upstream, severe thunderstorms are expected to evolve into a bowing
segment, possibly requiring a new ww for portions of
western/southern IN in the pre-dawn hours.
..Bunting.. 06/19/2021
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...ILN...IND...
LAT...LON 40288529 40148485 39608538 39208552 39008565 38848611
38768642 38698683 38588711 38988752 40058744 40348742
40288529SPC 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 | Bartholomew, Brown, Clark, Daviess, Dearborn, Decatur and 21 more | 67 min |
| Jun 18, 9:09 PM EDT | Severe Thunderstorm Watch | SPC | Clark, Dearborn, Franklin, Jefferson, Ohio, Ripley and 3 more | 6 hr |
| Jun 19, 3:10 AM EDT | Mesoscale Discussion | SPC | Bartholomew, Brown, Clay, Fountain, Greene, Hendricks and 15 more | 2 hr |
Nearby
Mesoscale Discussions in Indiana, 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.