Alert archive / Colorado / Mesoscale Discussions in 2018
Mesoscale Discussion 1253
The Storm Prediction Center issued this mesoscale discussion at Aug 6, 2018, 8:06 PM MDT for 26 counties in Colorado; 5 counties in Nebraska; Laramie County, Wyoming. It was in force for 54 min.
The area
The outline as issued.
The facts
- Issued
- Aug 6, 2018, 8:06 PM MDT (02:06 UTC)
- Expired
- Aug 6, 2018, 9:00 PM MDT
- In force
- 54 min
- Issued by
- the Storm Prediction Center
All 32 counties
Adams County, CO, Arapahoe County, CO, Bent County, CO, Boulder County, CO, Broomfield County, CO, Crowley County, CO, Custer County, CO, Denver County, CO, Douglas County, CO, El Paso County, CO, Elbert County, CO, Fremont County, CO, Gilpin County, CO, Huerfano County, CO, Jefferson County, CO, Kiowa County, CO, Larimer County, CO, Las Animas County, CO, Lincoln County, CO, Logan County, CO, Morgan County, CO, Otero County, CO, Pueblo County, CO, Teller County, CO, Washington County, CO, Weld County, CO, Banner County, NE, Cheyenne County, NE, Kimball County, NE, Morrill County, NE, Scotts Bluff County, NE, Laramie County, WY
The radar
The Denver radar (KFTG), 18 km from the middle of the area, began a volume at 02:09 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, 2.1 hours before the alert went out and 109 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
- 1181 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 1882 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 37 m²/s²
- 0-3 km storm-relative helicity
- 146 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 4.5
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 7, 12:59 PM MDT | Mesoscale Discussion | SPC | Adams, Arapahoe, Bent, Broomfield, Crowley, Denver and 10 more | 2 hr |
| Aug 7, 1:45 PM MDT | Severe Thunderstorm Watch | SPC | Bent, Crowley, Custer, Douglas, Elbert, El Paso and 7 more | 7 hr |
| Aug 7, 4:44 PM MDT | Mesoscale Discussion | SPC | Bent, Costilla, Crowley, Custer, Douglas, Elbert and 8 more | 2 hr |
Nearby
Mesoscale Discussions in Colorado, 2018Mesoscale Discussions in Nebraska, 2018Mesoscale Discussions in Wyoming, 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.