Alert archive / Colorado / Mesoscale Discussions in 2016

Mesoscale Discussion 1441

July 29, 201619 counties in Colorado; 12 counties in Nebraska; 6 counties in Wyoming

The Storm Prediction Center issued this mesoscale discussion at Jul 29, 2016, 5:27 PM MDT for 19 counties in Colorado; 12 counties in Nebraska; 6 counties in Wyoming. It was in force for 108 min.

The area

The outline as issued.

The facts

Issued: Jul 29, 2016, 5:27 PM MDT (23:27 UTC)
Expired: Jul 29, 2016, 7:15 PM MDT
In force: 108 min
Issued by: the Storm Prediction Center

All 37 counties

Adams County, CO, Arapahoe County, CO, Boulder County, CO, Broomfield County, CO, Denver County, CO, Douglas County, CO, El Paso County, CO, Elbert County, CO, Gilpin County, CO, Jefferson County, CO, Larimer County, CO, Lincoln County, CO, Logan County, CO, Morgan County, CO, Phillips County, CO, Sedgwick County, CO, Teller County, CO, Washington County, CO, Weld County, CO, Banner County, NE, Box Butte County, NE, Cheyenne County, NE, Dawes County, NE, Deuel County, NE, Garden County, NE, Grant County, NE, Kimball County, NE, Morrill County, NE, Scotts Bluff County, NE, Sheridan County, NE, Sioux County, NE, Albany County, WY, Converse County, WY, Goshen County, WY, Laramie County, WY, Niobrara County, WY, Platte County, WY

The radar

The Cheyenne radar (KCYS), 112 km from the middle of the area, began a volume at 23:27 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: 816 J/kg
Mixed-layer CIN: -137 J/kg
Mixed-layer LCL: 866 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 33 m²/s²
0-3 km storm-relative helicity: 165 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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
Jul 28, 7:01 PM MDT	Mesoscale Discussion	SPC	Baca, Bent, Cheyenne, Crowley, El Paso, Kiowa and 5 more	59 min
Jul 28, 7:33 PM MDT	Severe Thunderstorm Watch	SPC	Baca, Bent, Cheyenne, Crowley, El Paso, Kiowa and 4 more	4 hr
Jul 28, 10:39 PM MDT	Mesoscale Discussion	SPC	Baca, Bent, Cheyenne, Crowley, Elbert, El Paso and 7 more	2 hr
Jul 29, 12:34 PM MDT	Mesoscale Discussion	SPC	Adams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver and 7 more	116 min
Jul 29, 1:08 PM MDT	Severe Thunderstorm Watch	SPC	Adams, Arapahoe, Boulder, Broomfield, Denver, Douglas and 11 more	9 hr
Jul 29, 2:42 PM MDT	Mesoscale Discussion	SPC	Huerfano, Las Animas, Otero, Pueblo	2 hr
Jul 29, 3:00 PM MDT	Mesoscale Discussion	SPC	Banner, Box Butte, Dawes, Morrill, Scotts Bluff, Sheridan and 1 more	90 min
Jul 29, 3:27 PM MDT	Severe Thunderstorm Watch	SPC	Banner, Box Butte, Cheyenne, Dawes, Deuel, Garden and 5 more	5 hr

Nearby

Mesoscale Discussions in Colorado, 2016 Mesoscale Discussions in Nebraska, 2016 Mesoscale Discussions in Wyoming, 2016 Every mesoscale discussion in 2016

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.