Alert archive / Michigan / Mesoscale Discussions in 2016

Mesoscale Discussion 1384

July 24, 20164 counties in Michigan

The Storm Prediction Center issued this mesoscale discussion at Jul 24, 2016, 11:08 AM EDT for 4 counties in Michigan. It was in force for 97 min.

The area

The outline as issued.

The facts

Issued
Jul 24, 2016, 11:08 AM EDT (15:08 UTC)
Expired
Jul 24, 2016, 12:45 PM EDT
In force
97 min
Issued by
the Storm Prediction Center
Chance of a watch
20%

Counties Lake County, MI, Mason County, MI, Newaygo County, MI, Oceana County, MI

The radar

The Grand Rapids radar (KGRR), 109 km from the middle of the area, began a volume at 15:09 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

Green Bay/Straub, WI (KGRB), launched 12:00Z, 3.1 hours before the alert went out and 174 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, Green Bay/Straub, WI at 12:00Z on 2016-07-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 645 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, Green Bay/Straub, WI at 12:00Z on 2016-07-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 256 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
645 J/kg
Mixed-layer CIN
-84 J/kg
Mixed-layer LCL
631 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
256 m²/s²
0-3 km storm-relative helicity
294 m²/s²
Significant tornado parameter
0.6
Supercell composite
10.2

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.

IssuedProductOfficeCountiesLasted
Jul 24, 3:25 PM EDTMesoscale DiscussionSPCAllegan, Berrien, Cass, Van Buren3 hr
Jul 24, 6:42 PM EDTMesoscale DiscussionSPCBerrien, Cass, Van Buren93 min

Nearby

Mesoscale Discussions in Michigan, 2016Every mesoscale discussion in 2016

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.