Alert archive / Minnesota / Mesoscale Discussions in 2015

Mesoscale Discussion 672

May 16, 201518 counties in Minnesota; 4 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at May 16, 2015, 7:11 PM CDT for 18 counties in Minnesota; 4 counties in South Dakota. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued
May 16, 2015, 7:11 PM CDT (00:11 UTC)
Expired
May 16, 2015, 8:45 PM CDT
In force
94 min
Issued by
the Storm Prediction Center
All 22 counties

Big Stone County, MN, Chippewa County, MN, Douglas County, MN, Grant County, MN, Kandiyohi County, MN, Lac qui Parle County, MN, Lincoln County, MN, Lyon County, MN, Meeker County, MN, Pope County, MN, Redwood County, MN, Renville County, MN, Stearns County, MN, Stevens County, MN, Swift County, MN, Todd County, MN, Traverse County, MN, Yellow Medicine County, MN, Codington County, SD, Deuel County, SD, Grant County, SD, Hamlin County, SD

The nearest sounding before it

Minneapolis, MN (KMPX), launched 00:00Z, 0.2 hours before the alert went out and 133 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 2015-05-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 440 joules per kilogram.LCLLFCEL10008507005003002001001 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 2015-05-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 234 square meters per square second.193958Sfc1 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
440 J/kg
Mixed-layer CIN
-31 J/kg
Mixed-layer LCL
1055 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
234 m²/s²
0-3 km storm-relative helicity
286 m²/s²
Significant tornado parameter
0.6
Supercell composite
11.3

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
May 17, 12:51 PM CDTMesoscale DiscussionSPCBenton, Blue Earth, Brown, Carver, Chippewa, Cottonwood and 28 more114 min

Nearby

Mesoscale Discussions in Minnesota, 2015Mesoscale Discussions in South Dakota, 2015Every mesoscale discussion in 2015

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.