Alert archive / Kansas / Mesoscale Discussions in 2018
Mesoscale Discussion 455
The Storm Prediction Center issued this mesoscale discussion at May 18, 2018, 6:27 PM CDT for 9 counties in Kansas; Dundy County, Hitchcock County, Red Willow County, Nebraska. It was in force for 63 min.
The area
The outline as issued.
The facts
- Issued
- May 18, 2018, 6:27 PM CDT (23:27 UTC)
- Expired
- May 18, 2018, 7:30 PM CDT
- In force
- 63 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 40%
Counties Cheyenne County, KS, Decatur County, KS, Gove County, KS, Graham County, KS, Norton County, KS, Rawlins County, KS, Sheridan County, KS, Sherman County, KS, Thomas County, KS, Dundy County, NE, Hitchcock County, NE, Red Willow County, NE
The radar
The Goodland radar (KGLD), 76 km from the middle of the area, began a volume at 23:27 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 12:00Z, 11.5 hours before the alert went out and 167 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
- 941 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- -493 m²/s²
- 0-3 km storm-relative helicity
- -214 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 18, 2:43 PM CDT | Mesoscale Discussion | SPC | Clark, Comanche, Edwards, Ellis, Finney, Ford and 22 more | 2 hr |
| May 18, 4:02 PM CDT | Severe Thunderstorm Watch | SPC | Barber, Cheyenne, Clark, Comanche, Decatur, Edwards and 34 more | 7 hr |
| May 17, 7:47 PM CDT | Mesoscale Discussion | SPC | Arthur, Banner, Box Butte, Cheyenne, Dawes, Deuel and 9 more | 58 min |
| May 17, 10:03 PM CDT | Mesoscale Discussion | SPC | Arthur, Blaine, Brown, Cherry, Cheyenne, Deuel and 11 more | 117 min |
| May 18, 2:50 PM CDT | Mesoscale Discussion | SPC | Scotts Bluff, Sioux | 115 min |
| May 18, 6:04 PM CDT | Mesoscale Discussion | SPC | Banner, Box Butte, Dawes, Morrill, Scotts Bluff, Sioux | 86 min |
Nearby
Mesoscale Discussions in Kansas, 2018Mesoscale Discussions in Nebraska, 2018Every mesoscale discussion in 2018
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.