Alert archive / Kansas / Mesoscale Discussions in 2020
Mesoscale Discussion 1021
The Storm Prediction Center issued this mesoscale discussion at Jun 27, 2020, 3:22 AM CDT for 20 counties in Kansas; 4 counties in Missouri. It was in force for 53 min.
The area
The outline as issued.
The facts
- Issued
- Jun 27, 2020, 3:22 AM CDT (08:22 UTC)
- Expired
- Jun 27, 2020, 4:15 AM CDT
- In force
- 53 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe thunderstorm watch 308
All 24 counties
Chase County, KS, Dickinson County, KS, Douglas County, KS, Ellsworth County, KS, Franklin County, KS, Geary County, KS, Johnson County, KS, Leavenworth County, KS, Lyon County, KS, Marion County, KS, McPherson County, KS, Miami County, KS, Morris County, KS, Osage County, KS, Ottawa County, KS, Rice County, KS, Saline County, KS, Shawnee County, KS, Wabaunsee County, KS, Wyandotte County, KS, Cass County, MO, Clay County, MO, Jackson County, MO, Johnson County, MO
The radar
The Topeka radar (KTWX), 27 km from the middle of the area, began a volume at 08:26 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, 8.4 hours before the alert went out and 49 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
- 1238 J/kg
- Mixed-layer CIN
- -138 J/kg
- Mixed-layer LCL
- 1988 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 63 m²/s²
- 0-3 km storm-relative helicity
- 150 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.7
The text
As transmitted.
185
ACUS11 KWNS 270823
SWOMCD
SPC MCD 270822
MOZ000-KSZ000-270915-
Mesoscale Discussion 1021
NWS Storm Prediction Center Norman OK
0322 AM CDT Sat Jun 27 2020
Areas affected...Portions of central/eastern KS and far west-central
MO
Concerning...Severe Thunderstorm Watch 308...
Valid 270822Z - 270915Z
The severe weather threat for Severe Thunderstorm Watch 308
continues.
SUMMARY...An isolated strong to severe wind threat continues in the
short term, but the overall severe risk should gradually diminish
early this morning.
DISCUSSION...Consolidation of multiple clusters has occurred over
the past couple of hours across KS and into the Kansas City metro.
Overall radar presentation has recently become less organized as
convective inhibition continues to increase along/south of ongoing
storms. Even so, the more organized/strongest segment of the cluster
is now moving across the Kansas City metro, with mainly an isolated
strong to damaging wind threat. As the 35-45 kt southwesterly
low-level jet over KS gradually weakens through the remainder of the
early morning, the expectation is for a slow weakening trend to
ongoing storms within Severe Thunderstorm Watch 308. Accordingly, a
downstream/replacement watch for east-central KS into far
west-central MO is not anticipated at this time.
..Gleason.. 06/27/2020
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...EAX...TOP...ICT...
LAT...LON 38879841 39339736 39219544 39409419 38789352 38479399
38329504 38229642 38199841 38879841SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 26, 7:50 PM CDT | Severe Thunderstorm Watch | SPC | Atchison, Barton, Brown, Cheyenne, Clay, Cloud and 53 more | 8 hr |
| Jun 26, 8:13 PM CDT | Mesoscale Discussion | SPC | Cheyenne, Greeley, Rawlins, Sherman, Thomas, Wallace | 2 hr |
| Jun 26, 10:41 PM CDT | Mesoscale Discussion | SPC | Atchison, Brown, Clay, Cloud, Decatur, Doniphan and 28 more | 2 hr |
| Jun 27, 1:28 AM CDT | Mesoscale Discussion | SPC | Atchison, Barton, Brown, Clay, Cloud, Dickinson and 50 more | 2 hr |
| Jun 27, 6:01 PM CDT | Mesoscale Discussion | SPC | Cheyenne, Decatur, Finney, Ford, Gove, Graham and 21 more | 119 min |
Nearby
Mesoscale Discussions in Kansas, 2020Mesoscale Discussions in Missouri, 2020Every mesoscale discussion in 2020
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.