Alert archive / Kansas / Mesoscale Discussions in 2017
Mesoscale Discussion 1102
The Storm Prediction Center issued this mesoscale discussion at Jun 20, 2017, 3:40 PM CDT for 26 counties in Kansas. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 20, 2017, 3:40 PM CDT (20:40 UTC)
- Expired
- Jun 20, 2017, 5:45 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 26 counties
Barton County, KS, Edwards County, KS, Ellis County, KS, Ellsworth County, KS, Finney County, KS, Ford County, KS, Gove County, KS, Graham County, KS, Grant County, KS, Gray County, KS, Haskell County, KS, Hodgeman County, KS, Kearny County, KS, Lane County, KS, Lincoln County, KS, Logan County, KS, Ness County, KS, Osborne County, KS, Pawnee County, KS, Rooks County, KS, Rush County, KS, Russell County, KS, Scott County, KS, Sheridan County, KS, Trego County, KS, Wichita County, KS
The radar
The Dodge City radar (KDDC), 111 km from the middle of the area, began a volume at 20:44 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 12:00Z, 8.7 hours before the alert went out and 110 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
- 698 J/kg
- Mixed-layer CIN
- -190 J/kg
- Mixed-layer LCL
- 1238 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 171 m²/s²
- 0-3 km storm-relative helicity
- 158 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.7
The text
As transmitted.
848
ACUS11 KWNS 202041
SWOMCD
SPC MCD 202040
KSZ000-202245-
Mesoscale Discussion 1102
NWS Storm Prediction Center Norman OK
0340 PM CDT Tue Jun 20 2017
Areas affected...Parts of western and central Kansas
Concerning...Severe Thunderstorm Watch 357...
Valid 202040Z - 202245Z
The severe weather threat for Severe Thunderstorm Watch 357
continues.
SUMMARY...Thunderstorm development accompanied by increasing risk
for severe hail and wind expected across parts of western/central
Kansas through early evening.
DISCUSSION...Vigorous convective development is now well underway,
with storms beginning to increase in number near/west and southwest
of the Hill City area. In the presence of large CAPE (on the order
of 2000-3000 J/kg), strong vertical shear, and at least weak
lower/mid tropospheric warm advection, considerable further
intensification and upscale convective growth appears possible
through 22-00Z.
The risk for severe hail will persist in strongest cells, and
locally strong downbursts are expected to become an increasing
threat in the presence of the strongly heated (surface temps in the
mid/upper 90s F) and deeply mixed boundary layer. Eventually, cold
pool consolidation and strengthening may coincide with the evolution
of an organized mesoscale convective system by this evening, which
should tend to forward propagate eastward/southward, perhaps
accompanied by an increasing areal risk for strong, potentially
damaging wind gusts.
..Kerr.. 06/20/2017
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...ICT...GID...DDC...GLD...
LAT...LON 39790011 39599845 38809794 37529962 37260135 38180141
39100132 39790011SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 20, 12:59 PM CDT | Mesoscale Discussion | SPC | Barton, Decatur, Ellis, Ellsworth, Gove, Graham and 16 more | 2 hr |
| Jun 20, 1:52 PM CDT | Severe Thunderstorm Watch | SPC | Barton, Clay, Cloud, Dickinson, Edwards, Ellis and 37 more | 7 hr |
| Jun 20, 6:18 PM CDT | Mesoscale Discussion | SPC | Barton, Decatur, Ellis, Ellsworth, Finney, Gove and 26 more | 117 min |
Nearby
Mesoscale Discussions in Kansas, 2017Every mesoscale discussion in 2017
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.