Alert archive / Colorado / Mesoscale Discussions in 2015

Mesoscale Discussion 896

June 5, 201520 counties in Colorado; Banner County, Kimball County, Scotts Bluff County, Nebraska; 6 counties in Wyoming

The Storm Prediction Center issued this mesoscale discussion at Jun 5, 2015, 12:49 PM MDT for 20 counties in Colorado; Banner County, Kimball County, Scotts Bluff County, Nebraska; 6 counties in Wyoming. It was in force for 86 min.

The area

The outline as issued.

The facts

Issued: Jun 5, 2015, 12:49 PM MDT (18:49 UTC)
Expired: Jun 5, 2015, 2:15 PM MDT
In force: 86 min
Issued by: the Storm Prediction Center
Chance of a watch: 80%

All 29 counties

Adams County, CO, Arapahoe County, CO, Bent County, CO, Broomfield County, CO, Crowley County, CO, Denver County, CO, Douglas County, CO, El Paso County, CO, Elbert County, CO, Huerfano County, CO, Jefferson County, CO, Las Animas County, CO, Lincoln County, CO, Logan County, CO, Morgan County, CO, Otero County, CO, Pueblo County, CO, Teller County, CO, Washington County, CO, Weld County, CO, Banner County, NE, Kimball County, NE, Scotts Bluff County, NE, Albany County, WY, Converse County, WY, Goshen County, WY, Laramie County, WY, Natrona County, WY, Platte County, WY

The radar

The Cheyenne radar (KCYS), 40 km from the middle of the area, began a volume at 18:48 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

Tornado Watch 258Jun 5, 1:10 PM MDT

The nearest sounding before it

Denver, CO (KDEN), launched 12:00Z, 6.8 hours before the alert went out and 194 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: 356 J/kg
Mixed-layer CIN: -70 J/kg
Mixed-layer LCL: 888 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: -12 m²/s²
0-3 km storm-relative helicity: 68 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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
Jun 4, 6:06 PM MDT	Tornado Watch	SPC	Kit Carson, Yuma	5 hr
Jun 4, 7:20 PM MDT	Mesoscale Discussion	SPC	Bent, Crowley, El Paso, Otero, Prowers, Pueblo	2 hr
Jun 4, 8:20 PM MDT	Mesoscale Discussion	SPC	Adams, Arapahoe, Broomfield, Denver, Douglas, Elbert and 2 more	115 min
Jun 5, 1:09 PM MDT	Tornado Watch	SPC	Adams, Arapahoe, Baca, Bent, Boulder, Broomfield and 18 more	6 hr
Jun 5, 4:22 PM MDT	Mesoscale Discussion	SPC	Cheyenne, Kit Carson, Phillips, Yuma	53 min
Jun 5, 4:44 PM MDT	Tornado Watch	SPC	Cheyenne, Kit Carson, Phillips, Sedgwick, Yuma	7 hr
Jun 5, 5:59 PM MDT	Mesoscale Discussion	SPC	Kit Carson	61 min
Jun 4, 7:10 PM MDT	Mesoscale Discussion	SPC	Adams, Butler, Clay, Fillmore, Hall, Hamilton and 7 more	65 min
Jun 4, 10:29 PM MDT	Mesoscale Discussion	SPC	Franklin, Frontier, Furnas, Gosper, Harlan, Kearney and 2 more	61 min
Jun 5, 4:08 PM MDT	Mesoscale Discussion	SPC	Big Horn, Campbell, Converse, Crook, Hot Springs, Johnson and 5 more	3 hr

Nearby

Mesoscale Discussions in Colorado, 2015 Mesoscale Discussions in Wyoming, 2015 Mesoscale Discussions in Nebraska, 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.