Alert archive / Michigan / Mesoscale Discussions in 2017

Mesoscale Discussion 898

May 28, 201717 counties in Michigan

The Storm Prediction Center issued this mesoscale discussion at May 28, 2017, 12:54 PM EDT for 17 counties in Michigan. It was in force for 66 min.

The area

The outline as issued.

The facts

Issued: May 28, 2017, 12:54 PM EDT (16:54 UTC)
Expired: May 28, 2017, 2:00 PM EDT
In force: 66 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

Counties Alpena County, MI, Antrim County, MI, Cheboygan County, MI, Clare County, MI, Crawford County, MI, Emmet County, MI, Gladwin County, MI, Grand Traverse County, MI, Kalkaska County, MI, Missaukee County, MI, Montmorency County, MI, Ogemaw County, MI, Osceola County, MI, Oscoda County, MI, Otsego County, MI, Roscommon County, MI, Wexford County, MI

The radar

The NCL Michigan radar (KAPX), 15 km from the middle of the area, began a volume at 16:57 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

Detroit, MI (KDTX), launched 12:00Z, 4.9 hours before the alert went out and 249 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: 1059 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 52 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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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 28, 1:16 PM EDT	Mesoscale Discussion	SPC	Barry, Berrien, Branch, Calhoun, Cass, Eaton and 9 more	119 min
May 28, 1:56 PM EDT	Severe Thunderstorm Watch	SPC	Barry, Branch, Calhoun, Cass, Eaton, Hillsdale and 11 more	6 hr
May 28, 4:09 PM EDT	Mesoscale Discussion	SPC	Branch, Calhoun, Hillsdale, Jackson, Lenawee, Livingston and 6 more	66 min
May 28, 5:46 PM EDT	Mesoscale Discussion	SPC	Lenawee, Macomb, Monroe, Oakland, Washtenaw, Wayne	59 min

Nearby

Mesoscale Discussions in Michigan, 2017 Every mesoscale discussion in 2017

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.