Alert archive / Nebraska / Mesoscale Discussions in 2015
Mesoscale Discussion 1509
The Storm Prediction Center issued this mesoscale discussion at Jul 23, 2015, 1:34 PM MDT for 4 states. It was in force for 56 min.
The area
The outline as issued.
The facts
- Issued
- Jul 23, 2015, 1:34 PM MDT (19:34 UTC)
- Expired
- Jul 23, 2015, 2:30 PM MDT
- In force
- 56 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 95%
All 38 counties
Logan County, CO, Phillips County, CO, Sedgwick County, CO, Yuma County, CO, Cheyenne County, KS, Rawlins County, KS, Sherman County, KS, Arthur County, NE, Blaine County, NE, Boyd County, NE, Brown County, NE, Chase County, NE, Custer County, NE, Dawson County, NE, Deuel County, NE, Dundy County, NE, Frontier County, NE, Garfield County, NE, Gosper County, NE, Grant County, NE, Hayes County, NE, Hitchcock County, NE, Holt County, NE, Hooker County, NE, Keith County, NE, Keya Paha County, NE, Lincoln County, NE, Logan County, NE, Loup County, NE, McPherson County, NE, Perkins County, NE, Red Willow County, NE, Rock County, NE, Thomas County, NE, Valley County, NE, Brule County, SD, Gregory County, SD, Tripp County, SD
The radar
The North Platte radar (KLNX), 67 km from the middle of the area, began a volume at 19:36 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, 7.6 hours before the alert went out and 54 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
- 631 J/kg
- Mixed-layer CIN
- -267 J/kg
- Mixed-layer LCL
- 1320 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 179 m²/s²
- 0-3 km storm-relative helicity
- 161 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 |
|---|---|---|---|---|
| Jul 23, 2:04 PM MDT | Severe Thunderstorm Watch | SPC | Cheyenne, Kit Carson, Yuma | 8 hr |
| Jul 22, 6:34 PM MDT | Mesoscale Discussion | SPC | Rawlins, Sheridan, Thomas | 26 min |
| Jul 23, 5:55 PM MDT | Mesoscale Discussion | SPC | Cheyenne, Decatur, Logan, Rawlins, Sheridan, Sherman and 2 more | 2 hr |
| Jul 23, 12:34 PM MDT | Mesoscale Discussion | SPC | Corson | 116 min |
| Jul 23, 5:21 PM MDT | Mesoscale Discussion | SPC | Campbell, Corson | 24 min |
Nearby
Mesoscale Discussions in Nebraska, 2015Mesoscale Discussions in Colorado, 2015Mesoscale Discussions in Kansas, 2015Every mesoscale discussion in 2015
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.