Alert archive / Wisconsin / Mesoscale Discussions in 2016

Mesoscale Discussion 1344

July 21, 20168 counties in Michigan; 14 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Jul 21, 2016, 4:54 AM EDT for 8 counties in Michigan; 14 counties in Wisconsin. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jul 21, 2016, 4:54 AM EDT (08:54 UTC)
Expired
Jul 21, 2016, 7:00 AM EDT
In force
2 hr
Issued by
the Storm Prediction Center
Chance of a watch
60%
All 22 counties

Baraga County, MI, Dickinson County, MI, Gogebic County, MI, Houghton County, MI, Iron County, MI, Keweenaw County, MI, Marquette County, MI, Ontonagon County, MI, Ashland County, WI, Bayfield County, WI, Burnett County, WI, Douglas County, WI, Florence County, WI, Forest County, WI, Iron County, WI, Marinette County, WI, Oneida County, WI, Price County, WI, Rusk County, WI, Sawyer County, WI, Vilas County, WI, Washburn County, WI

The radar

The Duluth radar (KDLH), 155 km from the middle of the area, began a volume at 08:56 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 00:00Z, 8.9 hours before the alert went out and 275 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 00:00Z on 2016-07-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 788 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 00:00Z on 2016-07-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 44 square meters per square second.19395878Sfc1 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
788 J/kg
Mixed-layer CIN
-127 J/kg
Mixed-layer LCL
1402 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
44 m²/s²
0-3 km storm-relative helicity
50 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.6

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, 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, 12:19 PM EDTMesoscale DiscussionSPCAlcona, Alpena, Arenac, Bay, Cheboygan, Clare and 30 more116 min
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 Wisconsin, 2016Mesoscale 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.