Alert archive / Colorado / Mesoscale Discussions in 2018
Mesoscale Discussion 791
The Storm Prediction Center issued this mesoscale discussion at Jun 19, 2018, 11:48 AM MDT for 25 counties in Colorado. It was in force for 117 min.
The area
The outline as issued.
The facts
- Issued
- Jun 19, 2018, 11:48 AM MDT (17:48 UTC)
- Expired
- Jun 19, 2018, 1:45 PM MDT
- In force
- 117 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 80%
All 25 counties
Adams County, CO, Arapahoe County, CO, Baca County, CO, Bent County, CO, Broomfield County, CO, Cheyenne County, CO, Crowley County, CO, Denver County, CO, Douglas County, CO, El Paso County, CO, Elbert County, CO, Kiowa County, CO, Kit Carson County, CO, Las Animas County, CO, Lincoln County, CO, Logan County, CO, Morgan County, CO, Otero County, CO, Phillips County, CO, Prowers County, CO, Pueblo County, CO, Sedgwick County, CO, Washington County, CO, Weld County, CO, Yuma County, CO
The radar
The Denver radar (KFTG), 75 km from the middle of the area, began a volume at 17:52 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
Denver, CO (KDEN), launched 12:00Z, 5.8 hours before the alert went out and 94 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
- 30 J/kg
- Mixed-layer CIN
- -220 J/kg
- Mixed-layer LCL
- 836 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 70 m²/s²
- 0-3 km storm-relative helicity
- 73 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
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 |
|---|---|---|---|---|
| Jun 18, 6:37 PM MDT | Severe Thunderstorm Watch | SPC | Adams, Arapahoe, Denver, Logan, Morgan, Washington and 1 more | 6 hr |
| Jun 18, 8:31 PM MDT | Mesoscale Discussion | SPC | Adams, Arapahoe, Broomfield, Denver, Logan, Morgan and 2 more | 119 min |
| Jun 18, 10:11 PM MDT | Mesoscale Discussion | SPC | Logan, Morgan, Weld | 2 hr |
| Jun 18, 10:42 PM MDT | Severe Thunderstorm Watch | SPC | Yuma | 3 hr |
| Jun 19, 12:25 PM MDT | Tornado Watch | SPC | Adams, Arapahoe, Baca, Bent, Boulder, Broomfield and 24 more | 7 hr |
| Jun 19, 1:54 PM MDT | Mesoscale Discussion | SPC | Adams, Arapahoe, Baca, Bent, Boulder, Broomfield and 24 more | 2 hr |
| Jun 19, 4:28 PM MDT | Mesoscale Discussion | SPC | Sedgwick | 2 hr |
Nearby
Mesoscale 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.