Alert archive / Kansas / Mesoscale Discussions in 2021
Mesoscale Discussion 318
The Storm Prediction Center issued this mesoscale discussion at Apr 6, 2021, 9:11 PM CDT for 14 counties in Kansas. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 6, 2021, 9:11 PM CDT (02:11 UTC)
- Expired
- Apr 6, 2021, 11:15 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Concerning
- Severe thunderstorm watch 72
Counties Barton County, KS, Clay County, KS, Cloud County, KS, Dickinson County, KS, Ellsworth County, KS, Geary County, KS, Lincoln County, KS, McPherson County, KS, Mitchell County, KS, Ottawa County, KS, Reno County, KS, Rice County, KS, Saline County, KS, Stafford County, KS
The radar
The Wichita radar (KICT), 121 km from the middle of the area, began a volume at 02:10 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
Dodge City, (KDDC), launched 00:00Z, 2.2 hours before the alert went out and 194 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
- 71 J/kg
- Mixed-layer CIN
- -135 J/kg
- Mixed-layer LCL
- 3516 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 70 m²/s²
- 0-3 km storm-relative helicity
- 234 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
283 ACUS11 KWNS 070211 SWOMCD SPC MCD 070211 KSZ000-070415- Mesoscale Discussion 0318 NWS Storm Prediction Center Norman OK 0911 PM CDT Tue Apr 06 2021 Areas affected...Central/Northern Kansas Concerning...Severe Thunderstorm Watch 72... Valid 070211Z - 070415Z The severe weather threat for Severe Thunderstorm Watch 72 continues. SUMMARY...Greatest severe risk in the next few hours will spread across central/northern Kansas. DISCUSSION...Slow-moving thunderstorm cluster has evolved from Jewell-Lincoln-Stafford County KS. Leading edge of this activity is beginning to surge east into Ottawa County (ww73), well ahead of the actual cold front. While the surface front will eventually catch up to this developing squall line, strong LLJ focused across central KS will continue to provide favorable inflow for eastward propagation through the instability axis. Hail continues to be the primary concern, though gusty winds may also be noted with the bowing segment that is exiting the watch into Ottawa County. Southern-most portion of this squall line should begin to accelerate as the surface front will soon surge into this portion of the convective line. ..Darrow.. 04/07/2021 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...TOP...ICT...GID...DDC... LAT...LON 37889923 39699808 39709688 38949671 37829777 37889923
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 6, 7:10 PM CDT | Mesoscale Discussion | SPC | Barton, Edwards, Ellis, Ellsworth, Jewell, Kingman and 14 more | 2 hr |
| Apr 6, 9:06 PM CDT | Severe Thunderstorm Watch | SPC | Anderson, Chase, Clay, Cloud, Coffey, Dickinson and 22 more | 5 hr |
| Apr 6, 11:22 PM CDT | Mesoscale Discussion | SPC | Chase, Harvey, Kingman, Lyon, McPherson, Marion and 3 more | 113 min |
| Apr 7, 10:18 AM CDT | Mesoscale Discussion | SPC | Johnson, Miami, Wyandotte | 117 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.