Alert archive / Wisconsin / Mesoscale Discussions in 2012

Mesoscale Discussion 1218

June 19, 201218 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Jun 19, 2012, 6:22 AM CDT for 18 counties in Wisconsin. It was in force for 83 min.

The area

The outline as issued.

The facts

Issued: Jun 19, 2012, 6:22 AM CDT (11:22 UTC)
Expired: Jun 19, 2012, 7:45 AM CDT
In force: 83 min
Issued by: the Storm Prediction Center

Counties Brown County, WI, Clark County, WI, Door County, WI, Jackson County, WI, Kewaunee County, WI, Langlade County, WI, Lincoln County, WI, Marathon County, WI, Marinette County, WI, Menominee County, WI, Oconto County, WI, Outagamie County, WI, Portage County, WI, Shawano County, WI, Taylor County, WI, Trempealeau County, WI, Waupaca County, WI, Wood County, WI

The radar

The Green Bay radar (KGRB), 122 km from the middle of the area, began a volume at 11:26 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 00:00Z, 11.4 hours before the alert went out and 124 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: 1546 J/kg
Mixed-layer CIN: -52 J/kg
Mixed-layer LCL: 638 m above ground
0-6 km bulk shear: 66 kt
0-1 km storm-relative helicity: 122 m²/s²
0-3 km storm-relative helicity: 158 m²/s²
Significant tornado parameter: 1.7
Supercell composite: 8.5

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 19, 2:39 AM CDT	Mesoscale Discussion	SPC	Barron, Buffalo, Burnett, Chippewa, Clark, Dunn and 13 more	66 min
Jun 19, 3:25 AM CDT	Severe Thunderstorm Watch	SPC	Barron, Buffalo, Chippewa, Clark, Dunn, Eau Claire and 8 more	5 hr
Jun 19, 4:16 AM CDT	Mesoscale Discussion	SPC	Barron, Buffalo, Chippewa, Clark, Dunn, Eau Claire and 8 more	89 min
Jun 19, 5:11 AM CDT	Mesoscale Discussion	SPC	Brown, Door, Kewaunee, Langlade, Lincoln, Marathon and 8 more	34 min
Jun 19, 5:41 AM CDT	Severe Thunderstorm Watch	SPC	Brown, Door, Kewaunee, Langlade, Lincoln, Marathon and 8 more	4 hr
Jun 19, 7:52 AM CDT	Mesoscale Discussion	SPC	Brown, Door, Kewaunee, Langlade, Marinette, Menominee and 6 more	53 min
Jun 19, 6:08 PM CDT	Tornado Watch	SPC	Barron, Burnett, Douglas, Polk, Washburn	7 hr

Nearby

Mesoscale Discussions in Wisconsin, 2012 Every mesoscale discussion in 2012

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.