Alert archive / Colorado / Mesoscale Discussions in 2019

Mesoscale Discussion 652

May 17, 20196 counties in Colorado; 5 counties in Nebraska; Goshen County, Laramie County, Platte County, Wyoming

The Storm Prediction Center issued this mesoscale discussion at May 17, 2019, 4:07 PM MDT for 6 counties in Colorado; 5 counties in Nebraska; Goshen County, Laramie County, Platte County, Wyoming. It was in force for 113 min.

The area

The outline as issued.

The facts

Issued: May 17, 2019, 4:07 PM MDT (22:07 UTC)
Expired: May 17, 2019, 6:00 PM MDT
In force: 113 min
Issued by: the Storm Prediction Center

Counties Logan County, CO, Morgan County, CO, Phillips County, CO, Sedgwick County, CO, Washington County, CO, Weld County, CO, Banner County, NE, Cheyenne County, NE, Kimball County, NE, Morrill County, NE, Scotts Bluff County, NE, Goshen County, WY, Laramie County, WY, Platte County, WY

The radar

The Cheyenne radar (KCYS), 79 km from the middle of the area, began a volume at 22:08 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, 10.1 hours before the alert went out and 135 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2638 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 26 m²/s²
0-3 km storm-relative helicity: 135 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
May 17, 12:14 PM MDT	Mesoscale Discussion	SPC	Logan, Weld	2 hr
May 17, 12:54 PM MDT	Severe Thunderstorm Watch	SPC	Logan, Morgan, Phillips, Sedgwick, Washington, Weld	6 hr
May 17, 1:59 PM MDT	Tornado Watch	SPC	Yuma	9 hr
May 17, 4:45 PM MDT	Mesoscale Discussion	SPC	Yuma	2 hr
May 16, 6:57 PM MDT	Severe Thunderstorm Watch	SPC	Burt, Cuming, Dodge, Washington	6 hr
May 16, 7:06 PM MDT	Mesoscale Discussion	SPC	Antelope, Arthur, Blaine, Boone, Brown, Buffalo and 28 more	114 min
May 16, 10:12 PM MDT	Mesoscale Discussion	SPC	Burt, Cuming, Dodge, Washington	2 hr
May 17, 12:55 PM MDT	Mesoscale Discussion	SPC	Arthur, Blaine, Chase, Custer, Dawson, Dundy and 13 more	2 hr
May 17, 3:38 PM MDT	Severe Thunderstorm Watch	SPC	Boyd, Brown, Cherry, Keya Paha, Sheridan	7 hr

Nearby

Mesoscale Discussions in Colorado, 2019 Mesoscale Discussions in Nebraska, 2019 Mesoscale Discussions in Wyoming, 2019 Every mesoscale discussion in 2019

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.