Alert archive / Nebraska / Mesoscale Discussions in 2018
Mesoscale Discussion 1239
The Storm Prediction Center issued this mesoscale discussion at Aug 5, 2018, 6:05 PM MDT for Larimer County, Colorado; 5 counties in Nebraska; 5 counties in Wyoming. It was in force for 115 min.
The area
The outline as issued.
The facts
- Issued
- Aug 5, 2018, 6:05 PM MDT (00:05 UTC)
- Expired
- Aug 5, 2018, 8:00 PM MDT
- In force
- 115 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 5%
Counties Larimer County, CO, Banner County, NE, Cheyenne County, NE, Kimball County, NE, Scotts Bluff County, NE, Sioux County, NE, Albany County, WY, Carbon County, WY, Goshen County, WY, Laramie County, WY, Platte County, WY
The radar
The Cheyenne radar (KCYS), 86 km from the middle of the area, began a volume at 00:07 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
Denver, CO (KDEN), launched 00:00Z, 0.1 hours before the alert went out and 280 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
- 529 J/kg
- Mixed-layer CIN
- -112 J/kg
- Mixed-layer LCL
- 2350 m above ground
- 0-6 km bulk shear
- 63 kt
- 0-1 km storm-relative helicity
- 29 m²/s²
- 0-3 km storm-relative helicity
- 117 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.9
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 |
|---|---|---|---|---|
| Aug 6, 12:21 PM MDT | Mesoscale Discussion | SPC | Baca, Bent, Costilla, Crowley, Custer, El Paso and 7 more | 114 min |
| Aug 6, 12:59 PM MDT | Severe Thunderstorm Watch | SPC | Baca, Bent, Crowley, Custer, Douglas, Elbert and 10 more | 9 hr |
| Aug 6, 2:02 PM MDT | Mesoscale Discussion | SPC | Boulder, Larimer, Morgan, Weld | 88 min |
| Aug 6, 2:37 PM MDT | Severe Thunderstorm Watch | SPC | Adams, Arapahoe, Boulder, Broomfield, Denver, Jefferson and 5 more | 7 hr |
| Aug 6, 5:24 PM MDT | Mesoscale Discussion | SPC | Adams, Arapahoe, Bent, Boulder, Broomfield, Cheyenne and 24 more | 66 min |
| Aug 5, 7:16 PM MDT | Mesoscale Discussion | SPC | Harlan | 119 min |
| Aug 5, 8:32 PM MDT | Mesoscale Discussion | SPC | Adams, Burt, Butler, Cass, Clay, Colfax and 17 more | 2 hr |
| Aug 6, 1:31 PM MDT | Mesoscale Discussion | SPC | Boone, Buffalo, Burt, Butler, Cass, Colfax and 26 more | 89 min |
| Aug 6, 2:49 PM MDT | Mesoscale Discussion | SPC | Box Butte, Cherry, Dawes, Sheridan, Sioux | 86 min |
| Aug 6, 5:38 PM MDT | Mesoscale Discussion | SPC | Johnson, Nemaha, Otoe, Pawnee, Richardson | 2 hr |
Nearby
Mesoscale Discussions in Nebraska, 2018Mesoscale Discussions in Wyoming, 2018Mesoscale Discussions in Colorado, 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.