Alert archive / Colorado / Mesoscale Discussions in 2011
Mesoscale Discussion 1553
The Storm Prediction Center issued this mesoscale discussion at Jul 9, 2011, 4:56 PM MDT for 21 counties in Colorado; 7 counties in Kansas; 9 counties in Nebraska. It was in force for 94 min.
The area
The outline as issued.
The facts
- Issued
- Jul 9, 2011, 4:56 PM MDT (22:56 UTC)
- Expired
- Jul 9, 2011, 6:30 PM MDT
- In force
- 94 min
- Issued by
- the Storm Prediction Center
All 37 counties
Adams County, CO, Arapahoe County, CO, Bent 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, Logan County, CO, Morgan County, CO, Otero County, CO, Phillips County, CO, Pueblo County, CO, Sedgwick County, CO, Washington County, CO, Weld County, CO, Yuma County, CO, Cheyenne County, KS, Decatur County, KS, Greeley County, KS, Rawlins County, KS, Sherman County, KS, Thomas County, KS, Wallace County, KS, Chase County, NE, Dawson County, NE, Dundy County, NE, Frontier County, NE, Hayes County, NE, Hitchcock County, NE, Lincoln County, NE, Perkins County, NE, Red Willow County, NE
The radar
The Goodland radar (KGLD), 80 km from the middle of the area, began a volume at 22:58 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 (KDNR), launched 12:00Z, 10.9 hours before the alert went out and 66 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
- 108 J/kg
- Mixed-layer CIN
- -217 J/kg
- Mixed-layer LCL
- 1913 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 106 m²/s²
- 0-3 km storm-relative helicity
- 113 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
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 8, 7:57 PM MDT | Mesoscale Discussion | SPC | Cheyenne, Kit Carson, Lincoln, Phillips, Sedgwick, Washington and 1 more | 63 min |
| Jul 9, 1:52 PM MDT | Mesoscale Discussion | SPC | Baca, Bent, Cheyenne, Crowley, Elbert, Kiowa and 6 more | 53 min |
| Jul 9, 2:13 PM MDT | Severe Thunderstorm Watch | SPC | Adams, Arapahoe, Bent, Cheyenne, Crowley, Denver and 16 more | 8 hr |
| Jul 9, 4:25 PM MDT | Severe Thunderstorm Watch | SPC | Finney, Grant, Hamilton, Haskell, Kearny, Morton and 4 more | 6 hr |
Nearby
Mesoscale Discussions in Colorado, 2011Mesoscale Discussions in Nebraska, 2011Mesoscale Discussions in Kansas, 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.