Alert archive / Colorado / Mesoscale Discussions in 2015
Mesoscale Discussion 1698
The Storm Prediction Center issued this mesoscale discussion at Aug 17, 2015, 1:59 PM MDT for 14 counties in Colorado; Laramie County, Wyoming. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 17, 2015, 1:59 PM MDT (19:59 UTC)
- Expired
- Aug 17, 2015, 4:00 PM MDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 80%
Counties Adams County, CO, Arapahoe County, CO, Broomfield County, CO, Cheyenne County, CO, Denver County, CO, Douglas County, CO, El Paso County, CO, Elbert County, CO, Kit Carson County, CO, Lincoln County, CO, Morgan County, CO, Washington County, CO, Weld County, CO, Yuma County, CO, Laramie County, WY
The radar
The Denver radar (KFTG), 61 km from the middle of the area, began a volume at 20:02 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, 8.0 hours before the alert went out and 52 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
- 318 J/kg
- Mixed-layer CIN
- -267 J/kg
- Mixed-layer LCL
- 1605 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- -36 m²/s²
- 0-3 km storm-relative helicity
- 5 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
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 |
|---|---|---|---|---|
| Aug 16, 9:04 PM MDT | Mesoscale Discussion | SPC | Prowers | 86 min |
| Aug 17, 1:06 PM MDT | Mesoscale Discussion | SPC | Costilla, Crowley, Huerfano, Las Animas, Otero, Pueblo | 2 hr |
| Aug 17, 2:32 PM MDT | Tornado Watch | SPC | Adams, Arapahoe, Baca, Bent, Boulder, Broomfield and 20 more | 7 hr |
| Aug 17, 4:41 PM MDT | Mesoscale Discussion | SPC | Adams, Arapahoe, Bent, Cheyenne, Crowley, Elbert and 11 more | 94 min |
| Aug 17, 1:10 PM MDT | Mesoscale Discussion | SPC | Big Horn, Campbell, Converse, Crook, Hot Springs, Johnson and 4 more | 3 hr |
| Aug 17, 2:47 PM MDT | Severe Thunderstorm Watch | SPC | Albany, Big Horn, Campbell, Converse, Crook, Goshen and 8 more | 7 hr |
Nearby
Mesoscale Discussions in Colorado, 2015Mesoscale Discussions in Wyoming, 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.