Alert archive / Colorado / Mesoscale Discussions in 2018

Mesoscale Discussion 727

June 13, 20185 states

The Storm Prediction Center issued this mesoscale discussion at Jun 13, 2018, 5:31 PM MDT for 5 states. It was in force for 89 min.

The area

The outline as issued.

The facts

Issued: Jun 13, 2018, 5:31 PM MDT (23:31 UTC)
Expired: Jun 13, 2018, 7:00 PM MDT
In force: 89 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

Counties Baca County, CO, Bent County, CO, Cheyenne County, CO, Kiowa County, CO, Kit Carson County, CO, Phillips County, CO, Prowers County, CO, Yuma County, CO, Cheyenne County, KS, Greeley County, KS, Hamilton County, KS, Sherman County, KS, Wallace County, KS, Chase County, NE, Dundy County, NE, Harding County, NM, Union County, NM, Cimarron County, OK

The radar

The Pueblo radar (KPUX), 105 km from the middle of the area, began a volume at 23:34 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

Denver, CO (KDEN), launched 12:00Z, 11.5 hours before the alert went out and 206 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: 663 J/kg
Mixed-layer CIN: -395 J/kg
Mixed-layer LCL: 1740 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 50 m²/s²
0-3 km storm-relative helicity: 78 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

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
Jun 13, 1:25 AM MDT	Mesoscale Discussion	SPC	Cheyenne, Elbert, El Paso, Kit Carson, Lincoln	3 hr
Jun 13, 1:42 PM MDT	Mesoscale Discussion	SPC	Adams, Arapahoe, Crowley, Denver, Douglas, Elbert and 6 more	2 hr
Jun 12, 11:40 PM MDT	Mesoscale Discussion	SPC	Barber, Clark, Comanche, Grant, Haskell, Kiowa and 4 more	3 hr
Jun 13, 10:14 AM MDT	Mesoscale Discussion	SPC	Cherry	61 min
Jun 12, 9:07 PM MDT	Mesoscale Discussion	SPC	Beaver, Beckham, Cimarron, Custer, Dewey, Ellis and 10 more	53 min

Nearby

Mesoscale Discussions in Colorado, 2018 Mesoscale Discussions in Kansas, 2018 Mesoscale Discussions in Nebraska, 2018 Every mesoscale discussion in 2018

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.