Alert archive / Wyoming / Mesoscale Discussions in 2014

Mesoscale Discussion 505

May 6, 2014Banner County, Scotts Bluff County, Nebraska; 5 counties in Wyoming

The Storm Prediction Center issued this mesoscale discussion at May 6, 2014, 6:06 PM MDT for Banner County, Scotts Bluff County, Nebraska; 5 counties in Wyoming. It was in force for 54 min.

The area

The outline as issued.

The facts

Issued: May 6, 2014, 6:06 PM MDT (00:06 UTC)
Expired: May 6, 2014, 7:00 PM MDT
In force: 54 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

Counties Banner County, NE, Scotts Bluff County, NE, Converse County, WY, Goshen County, WY, Laramie County, WY, Niobrara County, WY, Platte County, WY

The radar

The Cheyenne radar (KCYS), 92 km from the middle of the area, began a volume at 00:06 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 00:00Z, 0.1 hours before the alert went out and 264 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: 134 J/kg
Mixed-layer CIN: -53 J/kg
Mixed-layer LCL: 3362 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 229 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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
May 6, 11:52 PM MDT	Mesoscale Discussion	SPC	Arthur, Cheyenne, Deuel, Garden, Keith, Kimball and 1 more	2 hr
May 7, 11:59 AM MDT	Mesoscale Discussion	SPC	Arthur, Banner, Chase, Cheyenne, Deuel, Dundy and 6 more	2 hr
May 7, 12:37 PM MDT	Severe Thunderstorm Watch	SPC	Arthur, Banner, Chase, Cheyenne, Deuel, Dundy and 16 more	7 hr
May 7, 4:05 PM MDT	Mesoscale Discussion	SPC	Arthur, Banner, Chase, Cheyenne, Deuel, Dundy and 8 more	85 min
May 7, 5:54 PM MDT	Mesoscale Discussion	SPC	Adams, Antelope, Boone, Buffalo, Custer, Dawson and 15 more	66 min

Nearby

Mesoscale Discussions in Wyoming, 2014 Mesoscale Discussions in Nebraska, 2014 Every mesoscale discussion in 2014

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.