Alert archive / Wisconsin / Mesoscale Discussions in 2011

Mesoscale Discussion 1109

June 6, 201117 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Jun 6, 2011, 10:12 AM CDT for 17 counties in Wisconsin. It was in force for 93 min.

The area

The outline as issued.

The facts

Issued: Jun 6, 2011, 10:12 AM CDT (15:12 UTC)
Expired: Jun 6, 2011, 11:45 AM CDT
In force: 93 min
Issued by: the Storm Prediction Center

Counties Brown County, WI, Calumet County, WI, Dodge County, WI, Fond du Lac County, WI, Green Lake County, WI, Marathon County, WI, Menominee County, WI, Milwaukee County, WI, Outagamie County, WI, Ozaukee County, WI, Portage County, WI, Shawano County, WI, Sheboygan County, WI, Washington County, WI, Waupaca County, WI, Waushara County, WI, Winnebago County, WI

The radar

The Green Bay radar (KGRB), 79 km from the middle of the area, began a volume at 15:13 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, 3.2 hours before the alert went out and 77 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1658 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 123 m²/s²
0-3 km storm-relative helicity: 150 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 6, 1:08 AM CDT	Mesoscale Discussion	SPC	Buffalo, Crawford, Grant, Iowa, La Crosse, Lafayette and 2 more	2 hr
Jun 6, 2:09 AM CDT	Severe Thunderstorm Watch	SPC	Adams, Buffalo, Chippewa, Clark, Columbia, Crawford and 17 more	8 hr
Jun 6, 6:15 AM CDT	Mesoscale Discussion	SPC	Adams, Columbia, Dane, Dodge, Green, Jefferson and 8 more	90 min
Jun 6, 7:00 AM CDT	Severe Thunderstorm Watch	SPC	Brown, Calumet, Columbia, Dane, Dodge, Fond du Lac and 21 more	5 hr
Jun 6, 2:02 PM CDT	Mesoscale Discussion	SPC	Door, Florence, Forest, Marinette, Oneida, Vilas	118 min

Nearby

Mesoscale Discussions in Wisconsin, 2011 Every mesoscale discussion in 2011

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.