Alert archive / Minnesota / Mesoscale Discussions in 2014

Mesoscale Discussion 1077

June 18, 201428 counties in Minnesota; 4 counties in North Dakota

The Storm Prediction Center issued this mesoscale discussion at Jun 18, 2014, 9:42 PM CDT for 28 counties in Minnesota; 4 counties in North Dakota. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued: Jun 18, 2014, 9:42 PM CDT (02:42 UTC)
Expired: Jun 19, 2014, 12:15 AM CDT
In force: 3 hr
Issued by: the Storm Prediction Center
Chance of a watch: 40%

All 32 counties

Blue Earth County, MN, Brown County, MN, Chippewa County, MN, Clay County, MN, Cottonwood County, MN, Douglas County, MN, Grant County, MN, Jackson County, MN, Kandiyohi County, MN, Lac qui Parle County, MN, Lyon County, MN, Martin County, MN, Meeker County, MN, Murray County, MN, Nicollet County, MN, Nobles County, MN, Norman County, MN, Otter Tail County, MN, Pope County, MN, Redwood County, MN, Renville County, MN, Sibley County, MN, Stevens County, MN, Swift County, MN, Traverse County, MN, Watonwan County, MN, Wilkin County, MN, Yellow Medicine County, MN, Barnes County, ND, Cass County, ND, Steele County, ND, Traill County, ND

The radar

The Aberdeen radar (KABR), 189 km from the middle of the area, began a volume at 02:44 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.

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 2.7 hours before the alert went out and 203 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: 1475 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 1398 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 147 m²/s²
0-3 km storm-relative helicity: 228 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 7.6

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 18, 8:47 PM CDT	Mesoscale Discussion	SPC	Big Stone, Chippewa, Grant, Jackson, Lac qui Parle, Lincoln and 10 more	88 min
Jun 18, 10:09 PM CDT	Tornado Watch	SPC	Big Stone, Blue Earth, Brown, Chippewa, Cottonwood, Faribault and 20 more	5 hr
Jun 19, 1:15 AM CDT	Mesoscale Discussion	SPC	Rock	90 min
Jun 19, 1:31 AM CDT	Severe Thunderstorm Watch	SPC	Cottonwood, Jackson, Lincoln, Lyon, Murray, Nobles and 2 more	3 hr
Jun 19, 1:32 AM CDT	Mesoscale Discussion	SPC	Blue Earth, Brown, Carver, Chippewa, Faribault, Freeborn and 16 more	58 min
Jun 19, 3:15 AM CDT	Mesoscale Discussion	SPC	Murray, Nobles, Pipestone, Rock	90 min
Jun 19, 2:02 PM CDT	Mesoscale Discussion	SPC	Blue Earth, Brown, Faribault, Freeborn, Le Sueur, Martin and 6 more	88 min
Jun 18, 7:37 PM CDT	Tornado Watch	SPC	Dickey, LaMoure, Ransom, Richland, Sargent	6 hr

Nearby

Mesoscale Discussions in Minnesota, 2014 Mesoscale Discussions in North 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.