Alert archive / Nebraska / Mesoscale Discussions in 2013
Mesoscale Discussion 657
The Storm Prediction Center issued this mesoscale discussion at May 16, 2013, 11:59 AM MDT for Phillips County, Sedgwick County, Colorado; Cheyenne County, Rawlins County, Kansas; 9 counties in Nebraska. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- May 16, 2013, 11:59 AM MDT (17:59 UTC)
- Expired
- May 16, 2013, 2:00 PM MDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 20%
Counties Phillips County, CO, Sedgwick County, CO, Cheyenne County, KS, Rawlins County, KS, Chase County, NE, Cheyenne County, NE, Deuel County, NE, Dundy County, NE, Frontier County, NE, Hayes County, NE, Hitchcock County, NE, Keith County, NE, Perkins County, NE
The radar
The Goodland radar (KGLD), 162 km from the middle of the area, began a volume at 18:01 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, 6.0 hours before the alert went out and 118 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
- 31 J/kg
- Mixed-layer CIN
- -294 J/kg
- Mixed-layer LCL
- 1883 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 50 m²/s²
- 0-3 km storm-relative helicity
- 72 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 16, 12:51 PM MDT | Severe Thunderstorm Watch | SPC | Kit Carson, Yuma | 6 hr |
| May 16, 2:12 PM MDT | Mesoscale Discussion | SPC | Logan, Morgan, Weld | 93 min |
| May 16, 2:48 PM MDT | Mesoscale Discussion | SPC | Baca, Kiowa, Prowers | 87 min |
| May 16, 2:35 PM MDT | Mesoscale Discussion | SPC | Cheyenne, Decatur, Graham, Norton, Rawlins, Sheridan and 2 more | 85 min |
| May 16, 5:30 PM MDT | Mesoscale Discussion | SPC | Decatur, Gove, Graham, Norton, Phillips, Sheridan and 2 more | 90 min |
| May 16, 12:25 PM MDT | Mesoscale Discussion | SPC | Antelope, Boone, Cedar, Colfax, Cuming, Dixon and 9 more | 95 min |
Nearby
Mesoscale Discussions in Nebraska, 2013Mesoscale Discussions in Colorado, 2013Mesoscale Discussions in Kansas, 2013Every mesoscale discussion in 2013
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.