Alert archive / Nebraska / Mesoscale Discussions in 2011

Mesoscale Discussion 1295

June 19, 20117 counties in Colorado; 9 counties in Nebraska

The Storm Prediction Center issued this mesoscale discussion at Jun 19, 2011, 1:09 PM MDT for 7 counties in Colorado; 9 counties in Nebraska. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jun 19, 2011, 1:09 PM MDT (19:09 UTC)
Expired: Jun 19, 2011, 3:15 PM MDT
In force: 2 hr
Issued by: the Storm Prediction Center

Counties Adams County, CO, Logan County, CO, Morgan County, CO, Phillips County, CO, Sedgwick County, CO, Washington County, CO, Yuma County, CO, Arthur County, NE, Chase County, NE, Cheyenne County, NE, Deuel County, NE, Dundy County, NE, Garden County, NE, Keith County, NE, Kimball County, NE, Perkins County, NE

The radar

The Goodland radar (KGLD), 145 km from the middle of the area, began a volume at 19:11 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 513Jun 19, 2:05 PM MDT

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 7.2 hours before the alert went out and 99 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: 330 J/kg
Mixed-layer CIN: -236 J/kg
Mixed-layer LCL: 1573 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 100 m²/s²
0-3 km storm-relative helicity: 108 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

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 19, 2:04 PM MDT	Tornado Watch	SPC	Adams, Arapahoe, Denver, Douglas, Elbert, Kit Carson and 8 more	7 hr
Jun 18, 7:54 PM MDT	Mesoscale Discussion	SPC	Adams, Buffalo, Clay, Dawson, Fillmore, Franklin and 11 more	66 min
Jun 18, 8:25 PM MDT	Severe Thunderstorm Watch	SPC	Adams, Clay, Fillmore, Hall, Hamilton, Howard and 6 more	4 hr
Jun 19, 2:52 PM MDT	Mesoscale Discussion	SPC	Adams, Buffalo, Clay, Dawson, Fillmore, Franklin and 18 more	113 min
Jun 19, 4:49 PM MDT	Mesoscale Discussion	SPC	Boyd, Holt, Knox, Rock	56 min
Jun 19, 4:58 PM MDT	Mesoscale Discussion	SPC	Buffalo, Chase, Custer, Dawson, Dundy, Frontier and 7 more	92 min
Jun 19, 5:10 PM MDT	Tornado Watch	SPC	Antelope, Blaine, Boone, Boyd, Brown, Buffalo and 36 more	7 hr
Jun 19, 5:21 PM MDT	Mesoscale Discussion	SPC	Cass, Clay, Fillmore, Gage, Jefferson, Johnson and 9 more	84 min
Jun 19, 5:51 PM MDT	Tornado Watch	SPC	Cass, Gage, Jefferson, Johnson, Lancaster, Nemaha and 4 more	7 hr

Nearby

Mesoscale Discussions in Nebraska, 2011 Mesoscale Discussions in Colorado, 2011 Every mesoscale discussion in 2011

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.