Alert archive / Kansas / Mesoscale Discussions in 2025
Mesoscale Discussion 521
The Storm Prediction Center issued this mesoscale discussion at Apr 22, 2025, 8:20 PM CDT for 18 counties in Kansas; 12 counties in Missouri. It was in force for 115 min.
The area
The outline as issued.
The facts
- Issued
- Apr 22, 2025, 8:20 PM CDT (01:20 UTC)
- Expired
- Apr 22, 2025, 10:15 PM CDT
- In force
- 115 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe potential...watch possible
- Chance of a watch
- 40%
All 30 counties
Atchison County, KS, Brown County, KS, Chase County, KS, Dickinson County, KS, Doniphan County, KS, Douglas County, KS, Geary County, KS, Jackson County, KS, Jefferson County, KS, Leavenworth County, KS, Lyon County, KS, Morris County, KS, Osage County, KS, Pottawatomie County, KS, Riley County, KS, Shawnee County, KS, Wabaunsee County, KS, Wyandotte County, KS, Andrew County, MO, Buchanan County, MO, Caldwell County, MO, Clay County, MO, Clinton County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Holt County, MO, Platte County, MO
The radar
The Topeka radar (KTWX), 79 km from the middle of the area, began a volume at 01:19 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, 1.3 hours before the alert went out and 53 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
- 484 J/kg
- Mixed-layer CIN
- -74 J/kg
- Mixed-layer LCL
- 2150 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 43 m²/s²
- 0-3 km storm-relative helicity
- 115 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.9
The text
As transmitted.
801 ACUS11 KWNS 230120 SWOMCD SPC MCD 230120 MOZ000-KSZ000-NEZ000-230315- Mesoscale Discussion 0521 NWS Storm Prediction Center Norman OK 0820 PM CDT Tue Apr 22 2025 Areas affected...Northeast Kansas into northwest Missouri Concerning...Severe potential...Watch possible Valid 230120Z - 230315Z Probability of Watch Issuance...40 percent SUMMARY...A few strong/severe thunderstorms are possible this evening. Hail is the primary risk. DISCUSSION...Water-vapor imagery suggests a weak, low amplitude short-wave trough is located over the central Plains. This feature is translating east and may provide some encouragement for isolated convective development along/near a frontal zone that currently extends from south of CNK-north of STJ. 00z sounding from TOP exhibited very steep lapse rates, but notable capping was evident near 2km, and surface-based convection may struggle to develop as nocturnal cooling increases. However, large-scale ascent ahead of the short wave may cool/moist mid levels such that an elevated parcel is more likely to freely convect over the next few hours. This activity could briefly attain severe levels, but longevity/coverage may not warrant a severe thunderstorm watch. ..Darrow/Mosier.. 04/23/2025 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...EAX...OAX...TOP...ICT... LAT...LON 39129752 40389460 40389345 39709364 38139657 39129752 MOST PROBABLE PEAK WIND GUST...55-70 MPH MOST PROBABLE PEAK HAIL SIZE...1.50-2.50 IN
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 22, 7:44 PM CDT | Mesoscale Discussion | SPC | Barber, Barton, Comanche, Edwards, Harper, Kingman and 7 more | 91 min |
| Apr 23, 11:54 AM CDT | Mesoscale Discussion | SPC | Atchison, Chase, Clay, Cloud, Dickinson, Douglas and 15 more | 3 hr |
| Apr 23, 2:39 PM CDT | Mesoscale Discussion | SPC | Finney, Gove, Greeley, Hamilton, Kearny, Lane and 6 more | 3 hr |
| Apr 23, 3:52 PM CDT | Severe Thunderstorm Watch | SPC | Cheyenne, Decatur, Finney, Ford, Gove, Graham and 24 more | 7 hr |
| Apr 23, 5:02 PM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Atchison, Coffey, Doniphan, Douglas and 12 more | 88 min |
| Apr 23, 5:30 PM CDT | Mesoscale Discussion | SPC | Finney, Gove, Grant, Gray, Greeley, Hamilton and 16 more | 90 min |
| Apr 23, 4:43 PM CDT | Mesoscale Discussion | SPC | Atchison, Worth | 92 min |
Nearby
Mesoscale Discussions in Kansas, 2025Mesoscale Discussions in Missouri, 2025Every mesoscale discussion in 2025
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.