Alert archive / Colorado / Mesoscale Discussions in 2011
Mesoscale Discussion 1606
The Storm Prediction Center issued this mesoscale discussion at Jul 13, 2011, 2:23 PM MDT for 15 counties in Colorado; 5 counties in Kansas; Laramie County, Wyoming. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 13, 2011, 2:23 PM MDT (20:23 UTC)
- Expired
- Jul 13, 2011, 4:30 PM MDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 21 counties
Adams County, CO, Arapahoe 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, Lincoln County, CO, Morgan County, CO, Washington County, CO, Weld County, CO, Greeley County, KS, Logan County, KS, Sherman County, KS, Thomas County, KS, Wallace County, KS, Laramie County, WY
The radar
The Denver radar (KFTG), 124 km from the middle of the area, began a volume at 20:25 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 (KDNR), launched 12:00Z, 8.4 hours before the alert went out and 17 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
- 217 J/kg
- Mixed-layer CIN
- -63 J/kg
- Mixed-layer LCL
- 616 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 26 m²/s²
- 0-3 km storm-relative helicity
- 73 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 |
|---|---|---|---|---|
| Jul 13, 1:47 PM MDT | Mesoscale Discussion | SPC | Mesa, Moffat, Rio Blanco | 88 min |
| Jul 13, 3:41 PM MDT | Tornado Watch | SPC | Cheyenne, Elbert, Kit Carson, Lincoln | 6 hr |
| Jul 13, 5:13 PM MDT | Severe Thunderstorm Watch | SPC | Adams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver and 7 more | 6 hr |
Nearby
Mesoscale Discussions in Colorado, 2011Mesoscale Discussions in Kansas, 2011Mesoscale Discussions in Wyoming, 2011Every mesoscale discussion in 2011
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.