Alert archive / Kansas / Mesoscale Discussions in 2012

Mesoscale Discussion 1236

June 20, 201211 counties in Kansas; Beaver County, Harper County, Texas County, Oklahoma; 4 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jun 20, 2012, 6:45 PM CDT for 11 counties in Kansas; Beaver County, Harper County, Texas County, Oklahoma; 4 counties in Texas. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued: Jun 20, 2012, 6:45 PM CDT (23:45 UTC)
Expired: Jun 20, 2012, 8:15 PM CDT
In force: 90 min
Issued by: the Storm Prediction Center
Chance of a watch: 40%

Counties Barber County, KS, Barton County, KS, Clark County, KS, Comanche County, KS, Edwards County, KS, Ford County, KS, Kiowa County, KS, Meade County, KS, Pawnee County, KS, Pratt County, KS, Stafford County, KS, Beaver County, OK, Harper County, OK, Texas County, OK, Hansford County, TX, Lipscomb County, TX, Ochiltree County, TX, Sherman County, TX

The radar

The Dodge City radar (KDDC), 29 km from the middle of the area, began a volume at 23:46 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

Dodge City, (KDDC), launched 12:00Z, 11.8 hours before the alert went out and 30 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1488 J/kg
Mixed-layer CIN: -401 J/kg
Mixed-layer LCL: 690 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 308 m²/s²
0-3 km storm-relative helicity: 400 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 20, 3:24 PM CDT	Mesoscale Discussion	SPC	Barton, Brown, Clay, Cloud, Dickinson, Edwards and 34 more	96 min

Nearby

Mesoscale Discussions in Kansas, 2012 Mesoscale Discussions in Texas, 2012 Mesoscale Discussions in Oklahoma, 2012 Every mesoscale discussion in 2012

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.