Alert archive / Nebraska / Mesoscale Discussions in 2014

Mesoscale Discussion 761

May 30, 20145 counties in Colorado; 7 counties in Nebraska; 5 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at May 30, 2014, 2:12 PM MDT for 5 counties in Colorado; 7 counties in Nebraska; 5 counties in South Dakota. It was in force for 93 min.

The area

The outline as issued.

The facts

Issued: May 30, 2014, 2:12 PM MDT (20:12 UTC)
Expired: May 30, 2014, 3:45 PM MDT
In force: 93 min
Issued by: the Storm Prediction Center
Chance of a watch: 40%

Counties Logan County, CO, Phillips County, CO, Sedgwick County, CO, Washington County, CO, Yuma County, CO, Arthur County, NE, Cherry County, NE, Cheyenne County, NE, Deuel County, NE, Garden County, NE, Grant County, NE, Sheridan County, NE, Bennett County, SD, Lyman County, SD, Mellette County, SD, Todd County, SD, Tripp County, SD

The radar

The North Platte radar (KLNX), 121 km from the middle of the area, began a volume at 20:12 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

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 8.2 hours before the alert went out and 132 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: 91 J/kg
Mixed-layer CIN: -218 J/kg
Mixed-layer LCL: 1605 m above ground
0-6 km bulk shear: 3 kt
0-1 km storm-relative helicity: -59 m²/s²
0-3 km storm-relative helicity: 107 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

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 29, 7:47 PM MDT	Mesoscale Discussion	SPC	Butte, Harding, Lawrence, Meade, Pennington, Perkins	58 min
May 30, 1:56 PM MDT	Mesoscale Discussion	SPC	Brown, Campbell, Dewey, Edmunds, Faulk, Hughes and 6 more	94 min

Nearby

Mesoscale Discussions in Nebraska, 2014 Mesoscale Discussions in Colorado, 2014 Mesoscale Discussions in South Dakota, 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.