Alert archive / Michigan / Mesoscale Discussions in 2018

Mesoscale Discussion 541

May 27, 201822 counties in Michigan

The Storm Prediction Center issued this mesoscale discussion at May 27, 2018, 3:12 PM EDT for 22 counties in Michigan. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued
May 27, 2018, 3:12 PM EDT (19:12 UTC)
Expired
May 27, 2018, 5:45 PM EDT
In force
3 hr
Issued by
the Storm Prediction Center
Chance of a watch
20%
All 22 counties

Alcona County, MI, Alpena County, MI, Arenac County, MI, Bay County, MI, Clare County, MI, Clinton County, MI, Genesee County, MI, Gladwin County, MI, Gratiot County, MI, Huron County, MI, Iosco County, MI, Isabella County, MI, Lapeer County, MI, Mecosta County, MI, Midland County, MI, Montcalm County, MI, Ogemaw County, MI, Oscoda County, MI, Roscommon County, MI, Saginaw County, MI, Shiawassee County, MI, Tuscola County, MI

The radar

The Detroit radar (KDTX), 128 km from the middle of the area, began a volume at 19:14 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, 7.2 hours before the alert went out and 126 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, Detroit, MI at 12:00Z on 2018-05-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 329 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, Detroit, MI at 12:00Z on 2018-05-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 39 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
329 J/kg
Mixed-layer CIN
-136 J/kg
Mixed-layer LCL
1359 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
39 m²/s²
0-3 km storm-relative helicity
90 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, 2018Every mesoscale discussion in 2018

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.