Alert archive / Kansas / Mesoscale Discussions in 2017

Mesoscale Discussion 1492

August 13, 20174 states

The Storm Prediction Center issued this mesoscale discussion at Aug 13, 2017, 8:13 PM MDT for 4 states. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued: Aug 13, 2017, 8:13 PM MDT (02:13 UTC)
Expired: Aug 13, 2017, 9:45 PM MDT
In force: 92 min
Issued by: the Storm Prediction Center

Counties Baca County, CO, Bent County, CO, Kiowa County, CO, Prowers County, CO, Grant County, KS, Greeley County, KS, Hamilton County, KS, Haskell County, KS, Kearny County, KS, Morton County, KS, Seward County, KS, Stanton County, KS, Stevens County, KS, Cimarron County, OK, Texas County, OK, Dallam County, TX, Hansford County, TX, Moore County, TX, Ochiltree County, TX, Sherman County, TX

The radar

The Dodge City radar (KDDC), 188 km from the middle of the area, began a volume at 02:13 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

Amarillo Airport, TX (KAMA), launched 00:00Z, 2.2 hours before the alert went out and 242 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: 2289 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 1216 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 53 m²/s²
0-3 km storm-relative helicity: 130 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 8.3

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 13, 6:38 PM MDT	Mesoscale Discussion	SPC	Cheyenne, Kit Carson, Yuma	97 min
Aug 14, 2:32 PM MDT	Mesoscale Discussion	SPC	Baca	2 hr
Aug 13, 10:10 PM MDT	Mesoscale Discussion	SPC	Graham, Norton, Phillips, Rooks, Smith	95 min
Aug 13, 10:24 PM MDT	Mesoscale Discussion	SPC	Cotton, Jefferson, Tillman	96 min
Aug 13, 7:53 PM MDT	Mesoscale Discussion	SPC	Briscoe, Castro, Childress, Cottle, Floyd, Hall and 2 more	97 min

Nearby

Mesoscale Discussions in Kansas, 2017 Mesoscale Discussions in Texas, 2017 Mesoscale Discussions in Colorado, 2017 Every mesoscale discussion in 2017

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.