Alert archive / Kansas / Mesoscale Discussions in 2021
Mesoscale Discussion 1441
The Storm Prediction Center issued this mesoscale discussion at Aug 7, 2021, 11:42 PM CDT for 8 counties in Kansas. It was in force for 93 min.
The area
The outline as issued.
The facts
- Issued
- Aug 7, 2021, 11:42 PM CDT (04:42 UTC)
- Expired
- Aug 8, 2021, 1:15 AM CDT
- In force
- 93 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe thunderstorm watch 414
Counties Butler County, KS, Chase County, KS, Greenwood County, KS, Harper County, KS, Harvey County, KS, Lyon County, KS, Sedgwick County, KS, Sumner County, KS
The radar
The Wichita radar (KICT), 35 km from the middle of the area, began a volume at 04:43 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
Topeka, KS (KTOP), launched 00:00Z, 4.7 hours before the alert went out and 191 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
- 1803 J/kg
- Mixed-layer CIN
- -63 J/kg
- Mixed-layer LCL
- 1923 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 60 m²/s²
- 0-3 km storm-relative helicity
- 157 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 7.5
The text
As transmitted.
958
ACUS11 KWNS 080443
SWOMCD
SPC MCD 080442
KSZ000-OKZ000-080615-
Mesoscale Discussion 1441
NWS Storm Prediction Center Norman OK
1142 PM CDT Sat Aug 07 2021
Areas affected...Parts of south central and southeastern Kansas
Concerning...Severe Thunderstorm Watch 414...
Valid 080442Z - 080615Z
The severe weather threat for Severe Thunderstorm Watch 414
continues.
SUMMARY...A strong downburst or two may still be possible near and
north through east of the Wichita area between now and 1-2 AM,
before waning.
DISCUSSION...Forcing for ascent near outflow boundary intersection
has been sufficient to maintain vigorous thunderstorm development in
a small cluster which appears likely to progress across areas
near/north through east of the Wichita area during the next couple
of hours. Some further organization and intensification may still
be possible, along the with potential to produce a strong downburst
or two. However, northeast and east of the Wichita area, latest
observational data and objective analysis suggest that inflow into
convection may become increasing less unstable, and this risk may
wane near or shortly after 07Z..
..Kerr.. 08/08/2021
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...TOP...ICT...OUN...
LAT...LON 36959818 37299825 38009764 38249675 38499627 38569587
37999580 37689622 37369699 37119743 36959818SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 8:20 PM CDT | Mesoscale Discussion | SPC | Barber, Clark, Comanche, Harper, Kiowa, Meade and 1 more | 55 min |
| Aug 7, 9:35 PM CDT | Mesoscale Discussion | SPC | Atchison, Brown, Doniphan, Geary, Jackson, Jefferson and 7 more | 85 min |
| Aug 7, 11:19 PM CDT | Mesoscale Discussion | SPC | Doniphan | 86 min |
Nearby
Mesoscale Discussions in Kansas, 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.