Alert archive / Kansas / Mesoscale Discussions in 2007
Mesoscale Discussion 1817
The Storm Prediction Center issued this mesoscale discussion at Aug 20, 2007, 2:03 PM CDT for 27 counties in Kansas. It was in force for 117 min.
The area
The outline as issued.
The facts
- Issued
- Aug 20, 2007, 2:03 PM CDT (19:03 UTC)
- Expired
- Aug 20, 2007, 4:00 PM CDT
- In force
- 117 min
- Issued by
- the Storm Prediction Center
All 27 counties
Barton County, KS, Cloud County, KS, Edwards County, KS, Ellis County, KS, Ellsworth County, KS, Finney County, KS, Ford County, KS, Graham County, KS, Gray County, KS, Haskell County, KS, Hodgeman County, KS, Jewell County, KS, Lane County, KS, Lincoln County, KS, Mitchell County, KS, Ness County, KS, Osborne County, KS, Ottawa County, KS, Pawnee County, KS, Phillips County, KS, Rooks County, KS, Rush County, KS, Russell County, KS, Saline County, KS, Smith County, KS, Stafford County, KS, Trego County, KS
The radar
The Dodge City radar (KDDC), 143 km from the middle of the area, began a volume at 19:06 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
Dodge City, (KDDC), launched 12:00Z, 7.1 hours before the alert went out and 139 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
- 3207 J/kg
- Mixed-layer CIN
- -106 J/kg
- Mixed-layer LCL
- 1415 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 51 m²/s²
- 0-3 km storm-relative helicity
- 73 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.7
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 20, 3:29 PM CDT | Severe Thunderstorm Watch | SPC | Barton, Cloud, Edwards, Ellis, Ellsworth, Finney and 33 more | 7 hr |
| Aug 20, 5:52 PM CDT | Severe Thunderstorm Watch | SPC | Clark, Meade, Morton, Seward, Stevens | 6 hr |
| Aug 20, 6:27 PM CDT | Mesoscale Discussion | SPC | Atchison, Brown, Dickinson, Doniphan, Douglas, Franklin and 14 more | 2 hr |
| Aug 20, 6:50 PM CDT | Severe Thunderstorm Watch | SPC | Atchison, Brown, Clay, Dickinson, Doniphan, Douglas and 18 more | 6 hr |
Nearby
Mesoscale Discussions in Kansas, 2007Every mesoscale discussion in 2007
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.