Alert archive / Minnesota / Mesoscale Discussions in 2012

Mesoscale Discussion 1228

June 19, 201228 counties in Minnesota; Ashland County, Bayfield County, Douglas County, Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Jun 19, 2012, 11:37 PM CDT for 28 counties in Minnesota; Ashland County, Bayfield County, Douglas County, Wisconsin. It was in force for 83 min.

The area

The outline as issued.

The facts

Issued
Jun 19, 2012, 11:37 PM CDT (04:37 UTC)
Expired
Jun 20, 2012, 1:00 AM CDT
In force
83 min
Issued by
the Storm Prediction Center
All 31 counties

Aitkin County, MN, Benton County, MN, Big Stone County, MN, Carlton County, MN, Cass County, MN, Chippewa County, MN, Cook County, MN, Crow Wing County, MN, Douglas County, MN, Grant County, MN, Isanti County, MN, Kanabec County, MN, Kandiyohi County, MN, Lac qui Parle County, MN, Lake County, MN, Mille Lacs County, MN, Morrison County, MN, Otter Tail County, MN, Pine County, MN, Pope County, MN, Saint Louis County, MN, Sherburne County, MN, Stearns County, MN, Stevens County, MN, Swift County, MN, Todd County, MN, Traverse County, MN, Wadena County, MN, Ashland County, WI, Bayfield County, WI, Douglas County, WI

The radar

The Duluth radar (KDLH), 134 km from the middle of the area, began a volume at 04:41 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

Minneapolis, MN (KMPX), launched 00:00Z, 4.6 hours before the alert went out and 163 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-pSkew-T log-p diagram, Minneapolis, MN at 00:00Z on 2012-06-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3249 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 00:00Z on 2012-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 212 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
3249 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
1302 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
212 m²/s²
0-3 km storm-relative helicity
356 m²/s²
Significant tornado parameter
4.4
Supercell composite
29.2

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.

IssuedProductOfficeCountiesLasted
Jun 19, 7:01 PM CDTSevere Thunderstorm WatchSPCCottonwood, Jackson, Lincoln, Lyon, Murray, Nobles and 2 more7 hr
Jun 19, 9:12 PM CDTMesoscale DiscussionSPCAnoka, Benton, Big Stone, Chippewa, Chisago, Douglas and 22 more93 min
Jun 19, 9:17 PM CDTMesoscale DiscussionSPCAitkin, Becker, Cass, Clay, Crow Wing, Hubbard and 7 more88 min
Jun 19, 11:20 PM CDTSevere Thunderstorm WatchSPCBig Stone, Traverse5 hr
Jun 20, 4:00 AM CDTMesoscale DiscussionSPCLac qui Parle60 min
Jun 20, 5:27 AM CDTMesoscale DiscussionSPCAitkin, Carlton, Crow Wing, Mille Lacs, Morrison2 hr
Jun 20, 9:40 AM CDTMesoscale DiscussionSPCAnoka, Benton, Chisago, Isanti, Kanabec, Mille Lacs and 3 more95 min
Jun 20, 2:10 PM CDTMesoscale DiscussionSPCBlue Earth, Dakota, Dodge, Faribault, Fillmore, Freeborn and 11 more95 min

Nearby

Mesoscale Discussions in Minnesota, 2012Mesoscale Discussions in Wisconsin, 2012Every 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.