Alert archive / Kansas / Mesoscale Discussions in 2017
Mesoscale Discussion 855
The Storm Prediction Center issued this mesoscale discussion at May 27, 2017, 1:47 AM CDT for 16 counties in Kansas. It was in force for 88 min.
The area
The outline as issued.
The facts
- Issued
- May 27, 2017, 1:47 AM CDT (06:47 UTC)
- Expired
- May 27, 2017, 3:15 AM CDT
- In force
- 88 min
- Issued by
- the Storm Prediction Center
Counties Cheyenne County, KS, Decatur County, KS, Gove County, KS, Graham County, KS, Greeley County, KS, Lane County, KS, Logan County, KS, Norton County, KS, Rawlins County, KS, Scott County, KS, Sheridan County, KS, Sherman County, KS, Thomas County, KS, Trego County, KS, Wallace County, KS, Wichita County, KS
The radar
The Goodland radar (KGLD), 82 km from the middle of the area, began a volume at 06:48 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, 6.8 hours before the alert went out and 159 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
- 503 J/kg
- Mixed-layer CIN
- -170 J/kg
- Mixed-layer LCL
- 1857 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 29 m²/s²
- 0-3 km storm-relative helicity
- 151 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.7
The text
As transmitted.
598 ACUS11 KWNS 270647 SWOMCD SPC MCD 270647 KSZ000-270815- Mesoscale Discussion 0855 NWS Storm Prediction Center Norman OK 0147 AM CDT Sat May 27 2017 Areas affected...Northwest Kansas Concerning...Severe Thunderstorm Watch 271... Valid 270647Z - 270815Z The severe weather threat for Severe Thunderstorm Watch 271 continues. SUMMARY...Strong/locally severe storms -- developing in repeated bands -- continue moving rapidly east across northwest Kansas, through WW 271, where severe risk continues. DISCUSSION...Latest surface analysis depicts a low in eastern CO with a warm/stationary front extending eastward across the middle section of KS. Several bands of storms continue moving out of eastern CO into northwest KS, just north of the low/front, with repeated development occurring and continuing to track across some of the same areas. The most substantial area of storms from a radar perspective remains the well-organized/small-scale bow moving across Graham County KS, and adjacent parts of southern Norton and northern Trego Counties. Damaging winds remain a risk with this storm, along with potential for hail. Meanwhile, risk for locally damaging winds and large hail -- and possibly a brief tornado -- continues with a trailing cluster of storms crossing Gove County at this time, where a funnel cloud was recently reported. With a 45 kt southerly low-level jet indicated by area VWP data providing favorable low-level ascending inflow, and a front aligned roughly parallel to the mean flow/storm motion, it would appear that the environment is favorable for this convection to continue redeveloping and spreading east, along with continued severe risk. Initial storms -- including the lead/bowing band of convection -- will begin to move into newly issued WW 273 over the next hour. ..Goss.. 05/27/2017 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...GID...DDC...GLD... LAT...LON 38250199 39940203 39999967 39139950 38250020 38250199
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 26, 7:38 PM CDT | Severe Thunderstorm Watch | SPC | Cheyenne, Decatur, Finney, Gove, Graham, Greeley and 12 more | 7 hr |
| May 26, 10:03 PM CDT | Mesoscale Discussion | SPC | Cheyenne, Gove, Lane, Logan, Rawlins, Scott and 5 more | 117 min |
| May 26, 11:45 PM CDT | Mesoscale Discussion | SPC | Cheyenne, Decatur, Ellis, Gove, Graham, Logan and 12 more | 2 hr |
| May 27, 12:52 AM CDT | Severe Thunderstorm Watch | SPC | Barton, Ellis, Ellsworth, Jewell, Lincoln, Mitchell and 8 more | 5 hr |
| May 27, 3:35 AM CDT | Mesoscale Discussion | SPC | Barton, Clay, Cloud, Dickinson, Ellis, Ellsworth and 21 more | 115 min |
| May 27, 9:59 AM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Bourbon, Butler, Chase, Chautauqua and 20 more | 2 hr |
| May 27, 12:13 PM CDT | Tornado Watch | SPC | Bourbon, Cherokee, Crawford, Johnson, Linn, Miami | 7 hr |
| May 27, 1:12 PM CDT | Mesoscale Discussion | SPC | Bourbon, Cherokee, Crawford, Linn, Miami, Neosho | 93 min |
| May 27, 2:45 PM CDT | Mesoscale Discussion | SPC | Grant, Hamilton, Haskell, Kearny, Morton, Seward and 2 more | 2 hr |
| May 27, 2:46 PM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Bourbon, Coffey, Greenwood, Neosho and 1 more | 59 min |
| May 27, 5:27 PM CDT | Severe Thunderstorm Watch | SPC | Grant, Hamilton, Haskell, Kearny, Morton, Seward and 2 more | 6 hr |
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.