Alert archive / Michigan / Mesoscale Discussions in 2016

Mesoscale Discussion 1347

July 21, 201636 counties in Michigan; Milwaukee County, Racine County, Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Jul 21, 2016, 12:19 PM EDT for 36 counties in Michigan; Milwaukee County, Racine County, Wisconsin. It was in force for 116 min.

The area

The outline as issued.

The facts

Issued
Jul 21, 2016, 12:19 PM EDT (16:19 UTC)
Expired
Jul 21, 2016, 2:15 PM EDT
In force
116 min
Issued by
the Storm Prediction Center
All 38 counties

Alcona County, MI, Alpena County, MI, Arenac County, MI, Bay County, MI, Cheboygan County, MI, Clare County, MI, Clinton County, MI, Crawford County, MI, Genesee County, MI, Gladwin County, MI, Gratiot County, MI, Huron County, MI, Ionia County, MI, Iosco County, MI, Isabella County, MI, Kalkaska County, MI, Kent County, MI, Lake County, MI, Mecosta County, MI, Midland County, MI, Missaukee County, MI, Montcalm County, MI, Montmorency County, MI, Muskegon County, MI, Newaygo County, MI, Oceana County, MI, Ogemaw County, MI, Osceola County, MI, Oscoda County, MI, Otsego County, MI, Ottawa County, MI, Presque Isle County, MI, Roscommon County, MI, Saginaw County, MI, Shiawassee County, MI, Tuscola County, MI, Milwaukee County, WI, Racine County, WI

The radar

The NCL Michigan radar (KAPX), 91 km from the middle of the area, began a volume at 16:22 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, 4.3 hours before the alert went out and 188 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 2016-07-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 690 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 2016-07-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 10 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
690 J/kg
Mixed-layer CIN
-74 J/kg
Mixed-layer LCL
1014 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
10 m²/s²
0-3 km storm-relative helicity
26 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.

IssuedProductOfficeCountiesLasted
Jul 21, 4:54 AM EDTMesoscale DiscussionSPCBaraga, Dickinson, Gogebic, Houghton, Iron, Keweenaw and 2 more2 hr
Jul 21, 5:31 AM EDTSevere Thunderstorm WatchSPCAlger, Baraga, Delta, Dickinson, Gogebic, Houghton and 7 more6 hr
Jul 21, 7:39 AM EDTMesoscale DiscussionSPCAlger, Baraga, Delta, Dickinson, Houghton, Iron and 3 more2 hr
Jul 21, 9:28 AM EDTMesoscale DiscussionSPCAlcona, Alpena, Antrim, Arenac, Bay, Benzie and 42 more2 hr
Jul 21, 9:45 AM EDTSevere Thunderstorm WatchSPCAlcona, Alpena, Antrim, Arenac, Bay, Benzie and 43 more7 hr
Jul 21, 2:23 PM EDTMesoscale DiscussionSPCBranch, Calhoun, Cass, Hillsdale, Jackson, Lenawee and 5 more2 hr
Jul 21, 1:32 AM EDTSevere Thunderstorm WatchSPCAshland, Barron, Bayfield, Burnett, Chippewa, Douglas and 8 more6 hr
Jul 21, 3:30 AM EDTMesoscale DiscussionSPCBayfield, Burnett, Douglas, Washburn2 hr
Jul 21, 4:20 PM EDTMesoscale DiscussionSPCAdams, Buffalo, Columbia, Eau Claire, Iowa, Jackson and 9 more115 min
Jul 21, 5:26 PM EDTSevere Thunderstorm WatchSPCColumbia, Dane, Dodge, Fond du Lac, Green, Green Lake and 13 more5 hr
Jul 21, 6:42 PM EDTMesoscale DiscussionSPCColumbia, Dane, Dodge, Fond du Lac, Green, Green Lake and 12 more93 min

Nearby

Mesoscale Discussions in Michigan, 2016Mesoscale Discussions in Wisconsin, 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.