Alert archive / Kansas / Mesoscale Discussions in 2011

Mesoscale Discussion 1870

August 5, 201110 counties in Kansas; Beaver County, Harper County, Texas County, Oklahoma; 7 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Aug 5, 2011, 7:34 PM CDT for 10 counties in Kansas; Beaver County, Harper County, Texas County, Oklahoma; 7 counties in Texas. It was in force for 116 min.

The area

The outline as issued.

The facts

Issued: Aug 5, 2011, 7:34 PM CDT (00:34 UTC)
Expired: Aug 5, 2011, 9:30 PM CDT
In force: 116 min
Issued by: the Storm Prediction Center

Counties Clark County, KS, Ford County, KS, Grant County, KS, Gray County, KS, Haskell County, KS, Meade County, KS, Morton County, KS, Seward County, KS, Stanton County, KS, Stevens County, KS, Beaver County, OK, Harper County, OK, Texas County, OK, Hansford County, TX, Hutchinson County, TX, Lipscomb County, TX, Moore County, TX, Ochiltree County, TX, Roberts County, TX, Sherman County, TX

The radar

The Dodge City radar (KDDC), 150 km from the middle of the area, began a volume at 00:38 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 00:00Z, 0.6 hours before the alert went out and 155 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: 1259 J/kg
Mixed-layer CIN: -108 J/kg
Mixed-layer LCL: 1899 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 100 m²/s²
0-3 km storm-relative helicity: 230 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.0

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
Aug 6, 2:57 PM CDT	Mesoscale Discussion	SPC	Beckham, Blaine, Custer, Dewey, Garfield, Greer and 8 more	63 min

Nearby

Mesoscale Discussions in Kansas, 2011 Mesoscale Discussions in Texas, 2011 Mesoscale Discussions in Oklahoma, 2011 Every 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.