Alert archive / Kansas / Mesoscale Discussions in 2021
Mesoscale Discussion 1024
The Storm Prediction Center issued this mesoscale discussion at Jun 19, 2021, 9:00 PM CDT for 13 counties in Kansas; 12 counties in Nebraska. It was in force for 60 min.
The area
The outline as issued.
The facts
- Issued
- Jun 19, 2021, 9:00 PM CDT (02:00 UTC)
- Expired
- Jun 19, 2021, 10:00 PM CDT
- In force
- 60 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe thunderstorm watch 288
All 25 counties
Cloud County, KS, Decatur County, KS, Graham County, KS, Jewell County, KS, Mitchell County, KS, Norton County, KS, Osborne County, KS, Phillips County, KS, Republic County, KS, Rooks County, KS, Sheridan County, KS, Smith County, KS, Trego County, KS, Adams County, NE, Franklin County, NE, Frontier County, NE, Furnas County, NE, Gosper County, NE, Harlan County, NE, Kearney County, NE, Nuckolls County, NE, Phelps County, NE, Red Willow County, NE, Thayer County, NE, Webster County, NE
The radar
The Grand Island radar (KUEX), 95 km from the middle of the area, began a volume at 02:00 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 2.0 hours before the alert went out and 176 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2727 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 113 m²/s²
- 0-3 km storm-relative helicity
- 207 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
931
ACUS11 KWNS 200201
SWOMCD
SPC MCD 200200
KSZ000-NEZ000-200300-
Mesoscale Discussion 1024
NWS Storm Prediction Center Norman OK
0900 PM CDT Sat Jun 19 2021
Areas affected...northwest/north-central KS...south-central NE
Concerning...Severe Thunderstorm Watch 288...
Valid 200200Z - 200300Z
The severe weather threat for Severe Thunderstorm Watch 288
continues.
SUMMARY...The threat for significant severe winds will continue over
eastern portions of the watch area, and a downstream watch will be
needed prior to 0245z.
DISCUSSION...Latest reflectivity/velocity data from KGLD shows an
intense bowing line of severe thunderstorms moving east at 50 mph
across northwest KS and southwest NE. Several reports of severe
wind gusts have been received, including a measured gust to 84 mph
in Thomas County, KS. The downstream environment remains supportive
of a continued severe risk with strong instability (MUCAPE in excess
of 2500 J/kg), and around 35 kts of westerly effective shear.
Extrapolation of the current system movement would place the line at
the eastern edge of ww 288 by 03z/10 pm CDT, and thus a new Severe
Thunderstorm Watch will be needed prior to that time.
..Bunting.. 06/20/2021
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...TOP...ICT...GID...LBF...DDC...GLD...
LAT...LON 38830002 39120083 39800094 40160095 40740092 40820022
40849923 40599820 40249762 39699737 39329753 39099806
38830002SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 19, 7:22 PM CDT | Mesoscale Discussion | SPC | Cheyenne, Decatur, Logan, Rawlins, Sherman, Thomas and 1 more | 113 min |
| Jun 19, 9:43 PM CDT | Severe Thunderstorm Watch | SPC | Barton, Clay, Cloud, Ellsworth, Jewell, Lincoln and 10 more | 4 hr |
| Jun 19, 11:09 PM CDT | Mesoscale Discussion | SPC | Brown, Clay, Cloud, Jewell, Marshall, Mitchell and 7 more | 96 min |
| Jun 19, 11:59 PM CDT | Severe Thunderstorm Watch | SPC | Brown, Doniphan, Marshall, Nemaha | 4 hr |
| Jun 20, 2:02 PM CDT | Mesoscale Discussion | SPC | Atchison, Brown, Doniphan, Douglas, Jackson, Jefferson and 3 more | 118 min |
| Jun 20, 4:01 PM CDT | Severe Thunderstorm Watch | SPC | Atchison, Doniphan, Johnson, Leavenworth, Wyandotte | 7 hr |
| Jun 20, 6:56 PM CDT | Mesoscale Discussion | SPC | Atchison, Leavenworth, Wyandotte | 2 hr |
Nearby
Mesoscale Discussions in Kansas, 2021Mesoscale Discussions in Nebraska, 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.