Alert archive / Kansas / Mesoscale Discussions in 2011
Mesoscale Discussion 1957
The Storm Prediction Center issued this mesoscale discussion at Aug 12, 2011, 2:28 PM CDT for 19 counties in Kansas; 7 counties in Oklahoma. It was in force for 62 min.
The area
The outline as issued.
The facts
- Issued
- Aug 12, 2011, 2:28 PM CDT (19:28 UTC)
- Expired
- Aug 12, 2011, 3:30 PM CDT
- In force
- 62 min
- Issued by
- the Storm Prediction Center
All 26 counties
Barber County, KS, Clark County, KS, Comanche County, KS, Edwards County, KS, Finney County, KS, Ford County, KS, Gray County, KS, Harper County, KS, Hodgeman County, KS, Kingman County, KS, Kiowa County, KS, Lane County, KS, Ness County, KS, Pawnee County, KS, Pratt County, KS, Reno County, KS, Rush County, KS, Stafford County, KS, Sumner County, KS, Alfalfa County, OK, Garfield County, OK, Grant County, OK, Harper County, OK, Major County, OK, Woods County, OK, Woodward County, OK
The radar
The Dodge City radar (KDDC), 54 km from the middle of the area, began a volume at 19:27 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, 7.5 hours before the alert went out and 48 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
- 2073 J/kg
- Mixed-layer CIN
- -201 J/kg
- Mixed-layer LCL
- 1158 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 164 m²/s²
- 0-3 km storm-relative helicity
- 227 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 6.5
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 |
|---|---|---|---|---|
| Aug 12, 1:45 AM CDT | Mesoscale Discussion | SPC | Atchison, Brown, Doniphan, Jackson, Jefferson, Leavenworth and 6 more | 2 hr |
| Aug 12, 2:50 PM CDT | Severe Thunderstorm Watch | SPC | Barber, Barton, Butler, Chautauqua, Clark, Comanche and 31 more | 7 hr |
| Aug 12, 2:54 PM CDT | Mesoscale Discussion | SPC | Canadian, Carter, Cleveland, Garvin, Grady, Jefferson and 7 more | 96 min |
| Aug 12, 3:16 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Alfalfa, Atoka, Blaine, Bryan, Caddo and 57 more | 7 hr |
Nearby
Mesoscale Discussions in Kansas, 2011Mesoscale Discussions in Oklahoma, 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.