Alert archive / Colorado / Mesoscale Discussions in 2009
Mesoscale Discussion 1850
The Storm Prediction Center issued this mesoscale discussion at Aug 10, 2009, 1:29 AM MDT for 12 counties in Colorado; 10 counties in Kansas; 11 counties in Nebraska. It was in force for 61 min.
The area
The outline as issued.
The facts
- Issued
- Aug 10, 2009, 1:29 AM MDT (07:29 UTC)
- Expired
- Aug 10, 2009, 2:30 AM MDT
- In force
- 61 min
- Issued by
- the Storm Prediction Center
All 33 counties
Adams County, CO, Arapahoe County, CO, Cheyenne County, CO, Elbert County, CO, Kit Carson County, CO, Lincoln County, CO, Logan County, CO, Morgan County, CO, Phillips County, CO, Sedgwick County, CO, Washington County, CO, Yuma County, CO, Cheyenne County, KS, Decatur County, KS, Gove County, KS, Logan County, KS, Norton County, KS, Rawlins County, KS, Sheridan County, KS, Sherman County, KS, Thomas County, KS, Wallace County, KS, Chase County, NE, Deuel County, NE, Dundy County, NE, Frontier County, NE, Furnas County, NE, Hayes County, NE, Hitchcock County, NE, Keith County, NE, Lincoln County, NE, Perkins County, NE, Red Willow County, NE
The radar
The Goodland radar (KGLD), 66 km from the middle of the area, began a volume at 07:29 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 00:00Z, 7.5 hours before the alert went out and 93 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
- 183 J/kg
- Mixed-layer CIN
- -9 J/kg
- Mixed-layer LCL
- 2871 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 58 m²/s²
- 0-3 km storm-relative helicity
- 136 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
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 10, 1:49 AM MDT | Severe Thunderstorm Watch | SPC | Adams, Arapahoe, Cheyenne, Elbert, El Paso, Kiowa and 8 more | 6 hr |
| Aug 10, 5:02 AM MDT | Mesoscale Discussion | SPC | Cheyenne, Kit Carson, Lincoln, Washington, Yuma | 118 min |
| Aug 10, 1:07 PM MDT | Mesoscale Discussion | SPC | Adams, Arapahoe, Broomfield, Denver, Larimer, Logan and 6 more | 83 min |
| Aug 10, 4:38 PM MDT | Mesoscale Discussion | SPC | Adams, Arapahoe, Cheyenne, Elbert, El Paso, Kit Carson and 7 more | 67 min |
| Aug 10, 4:43 PM MDT | Severe Thunderstorm Watch | SPC | Adams, Arapahoe, Bent, Broomfield, Cheyenne, Crowley and 18 more | 9 hr |
| Aug 10, 7:01 AM MDT | Mesoscale Discussion | SPC | Barton, Cloud, Decatur, Dickinson, Ellis, Ellsworth and 28 more | 89 min |
| Aug 10, 8:21 AM MDT | Severe Thunderstorm Watch | SPC | Anderson, Barton, Brown, Chase, Clay, Cloud and 30 more | 6 hr |
| Aug 10, 10:29 AM MDT | Mesoscale Discussion | SPC | Allen, Anderson, Chase, Clay, Coffey, Dickinson and 27 more | 91 min |
| Aug 10, 12:50 PM MDT | Severe Thunderstorm Watch | SPC | Bourbon, Crawford, Johnson, Linn, Miami | 3 hr |
| Aug 10, 1:58 PM MDT | Mesoscale Discussion | SPC | Barber, Butler, Chautauqua, Clark, Comanche, Cowley and 8 more | 92 min |
Nearby
Mesoscale Discussions in Colorado, 2009Mesoscale Discussions in Nebraska, 2009Mesoscale Discussions in Kansas, 2009Every mesoscale discussion in 2009
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.