Alert archive / Kansas / Mesoscale Discussions in 2015

Mesoscale Discussion 1703

August 17, 20156 counties in Kansas; Cimarron County, Texas County, Oklahoma; 4 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Aug 17, 2015, 10:39 PM CDT for 6 counties in Kansas; Cimarron County, Texas County, Oklahoma; 4 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Aug 17, 2015, 10:39 PM CDT (03:39 UTC)
Expired: Aug 18, 2015, 12:45 AM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

Counties Grant County, KS, Hamilton County, KS, Kearny County, KS, Morton County, KS, Stanton County, KS, Stevens County, KS, Cimarron County, OK, Texas County, OK, Dallam County, TX, Hansford County, TX, Hartley County, TX, Sherman County, TX

The radar

The Amarillo radar (KAMA), 156 km from the middle of the area, began a volume at 03:40 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, 3.7 hours before the alert went out and 156 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: 297 J/kg
Mixed-layer CIN: -27 J/kg
Mixed-layer LCL: 2022 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: -16 m²/s²
0-3 km storm-relative helicity: 88 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

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 17, 7:52 PM CDT	Severe Thunderstorm Watch	SPC	Grant, Greeley, Hamilton, Kearny, Morton, Stanton and 3 more	5 hr
Aug 18, 2:11 PM CDT	Mesoscale Discussion	SPC	Allen, Anderson, Atchison, Bourbon, Butler, Chase and 34 more	3 hr
Aug 18, 3:06 PM CDT	Severe Thunderstorm Watch	SPC	Allen, Anderson, Atchison, Bourbon, Butler, Chase and 37 more	7 hr
Aug 18, 5:15 PM CDT	Mesoscale Discussion	SPC	Allen, Anderson, Atchison, Bourbon, Butler, Chase and 26 more	90 min
Aug 18, 3:15 PM CDT	Mesoscale Discussion	SPC	Beckham, Greer, Harmon, Roger Mills	3 hr

Nearby

Mesoscale Discussions in Kansas, 2015 Mesoscale Discussions in Texas, 2015 Mesoscale Discussions in Oklahoma, 2015 Every mesoscale discussion in 2015

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.