Alert archive / Minnesota / Mesoscale Discussions in 2012

Mesoscale Discussion 1547

July 22, 201217 counties in Minnesota; Richland County, Traill County, North Dakota

The Storm Prediction Center issued this mesoscale discussion at Jul 22, 2012, 6:55 PM CDT for 17 counties in Minnesota; Richland County, Traill County, North Dakota. It was in force for 95 min.

The area

The outline as issued.

The facts

Issued: Jul 22, 2012, 6:55 PM CDT (23:55 UTC)
Expired: Jul 22, 2012, 8:30 PM CDT
In force: 95 min
Issued by: the Storm Prediction Center

Counties Becker County, MN, Beltrami County, MN, Cass County, MN, Clay County, MN, Clearwater County, MN, Hubbard County, MN, Itasca County, MN, Koochiching County, MN, Lake County, MN, Mahnomen County, MN, Norman County, MN, Otter Tail County, MN, Polk County, MN, Red Lake County, MN, Saint Louis County, MN, Wadena County, MN, Wilkin County, MN, Richland County, ND, Traill County, ND

The radar

The Duluth radar (KDLH), 199 km from the middle of the area, began a volume at 23:56 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

International Fa, MN (KINL), launched 12:00Z, 11.9 hours before the alert went out and 152 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: 1489 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 76 m²/s²
0-3 km storm-relative helicity: 93 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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
Jul 21, 10:51 PM CDT	Mesoscale Discussion	SPC	Lincoln, Lyon, Murray, Nobles, Pipestone, Redwood and 2 more	54 min
Jul 22, 1:40 PM CDT	Mesoscale Discussion	SPC	Becker, Beltrami, Clay, Clearwater, Hubbard, Koochiching and 7 more	95 min
Jul 22, 2:32 PM CDT	Mesoscale Discussion	SPC	Blue Earth, Dodge, Faribault, Fillmore, Freeborn, Houston and 8 more	88 min
Jul 22, 3:25 PM CDT	Severe Thunderstorm Watch	SPC	Aitkin, Becker, Beltrami, Carlton, Cass, Clay and 18 more	6 hr
Jul 22, 5:45 PM CDT	Severe Thunderstorm Watch	SPC	Big Stone, Traverse	4 hr
Jul 21, 9:27 PM CDT	Mesoscale Discussion	SPC	Adams, Billings, Bowman, Burke, Divide, Dunn and 14 more	63 min

Nearby

Mesoscale Discussions in Minnesota, 2012 Mesoscale Discussions in North Dakota, 2012 Every mesoscale discussion in 2012

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.