Alert archive / Michigan / Mesoscale Discussions in 2019

Mesoscale Discussion 97

February 12, 20196 counties in Indiana; 30 counties in Michigan; 5 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at Feb 12, 2019, 2:40 AM EST for 6 counties in Indiana; 30 counties in Michigan; 5 counties in Ohio. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Feb 12, 2019, 2:40 AM EST (07:40 UTC)
Expired: Feb 12, 2019, 8:45 AM EST
In force: 6 hr
Issued by: the Storm Prediction Center

All 41 counties

DeKalb County, IN, Elkhart County, IN, LaGrange County, IN, Noble County, IN, Saint Joseph County, IN, Steuben County, IN, Allegan County, MI, Barry County, MI, Berrien County, MI, Branch County, MI, Calhoun County, MI, Cass County, MI, Clinton County, MI, Eaton County, MI, Genesee County, MI, Gratiot County, MI, Hillsdale County, MI, Ingham County, MI, Ionia County, MI, Jackson County, MI, Kalamazoo County, MI, Kent County, MI, Lapeer County, MI, Lenawee County, MI, Livingston County, MI, Macomb County, MI, Monroe County, MI, Montcalm County, MI, Oakland County, MI, Ottawa County, MI, Saint Clair County, MI, Saint Joseph County, MI, Shiawassee County, MI, Van Buren County, MI, Washtenaw County, MI, Wayne County, MI, Defiance County, OH, Fulton County, OH, Henry County, OH, Lucas County, OH, Williams County, OH

The radar

The Grand Rapids radar (KGRR), 80 km from the middle of the area, began a volume at 07:42 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

Cncnati-Daytn, OH (KILN), launched 00:00Z, 7.7 hours before the alert went out and 337 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: 492 m above ground
0-6 km bulk shear: 64 kt
0-1 km storm-relative helicity: 109 m²/s²
0-3 km storm-relative helicity: 343 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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Nearby

Mesoscale Discussions in Michigan, 2019 Mesoscale Discussions in Indiana, 2019 Mesoscale Discussions in Ohio, 2019 Every mesoscale discussion in 2019

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.