Alert archive / Wisconsin / Mesoscale Discussions in 2006

Mesoscale Discussion 241

March 11, 20068 counties in Illinois; 10 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Mar 11, 2006, 5:46 PM CST for 8 counties in Illinois; 10 counties in Wisconsin. It was in force for 89 min.

The area

The outline as issued.

The facts

Issued: Mar 11, 2006, 5:46 PM CST (23:46 UTC)
Expired: Mar 11, 2006, 7:15 PM CST
In force: 89 min
Issued by: the Storm Prediction Center

Counties Boone County, IL, Carroll County, IL, DeKalb County, IL, Kane County, IL, McHenry County, IL, Ogle County, IL, Stephenson County, IL, Winnebago County, IL, Columbia County, WI, Dane County, WI, Dodge County, WI, Fond du Lac County, WI, Green County, WI, Green Lake County, WI, Jefferson County, WI, Rock County, WI, Walworth County, WI, Waukesha County, WI

The radar

The Milwaukee radar (KMKX), 32 km from the middle of the area, began a volume at 23:48 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, 11.8 hours before the alert went out and 179 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: 1472 m above ground
0-6 km bulk shear: 60 kt
0-1 km storm-relative helicity: 189 m²/s²
0-3 km storm-relative helicity: 294 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
Mar 11, 1:29 AM CST	Mesoscale Discussion	SPC	Alexander, Bond, Clay, Clinton, Edwards, Franklin and 21 more	2 hr
Mar 11, 1:51 AM CST	Severe Thunderstorm Watch	SPC	Alexander, Clinton, Edwards, Franklin, Gallatin, Hamilton and 19 more	6 hr
Mar 11, 3:34 AM CST	Mesoscale Discussion	SPC	Adams, Bond, Brown, Calhoun, Cass, Champaign and 38 more	86 min
Mar 11, 5:53 AM CST	Mesoscale Discussion	SPC	Alexander, Clinton, Edwards, Franklin, Gallatin, Hamilton and 21 more	97 min
Mar 11, 9:36 AM CST	Mesoscale Discussion	SPC	Alexander, Bond, Calhoun, Clay, Clinton, Fayette and 17 more	54 min
Mar 11, 1:25 PM CST	Mesoscale Discussion	SPC	Adams, Brown, Bureau, Calhoun, Cass, Christian and 37 more	95 min
Mar 11, 2:22 PM CST	Tornado Watch	SPC	Adams, Bond, Brown, Bureau, Calhoun, Cass and 53 more	8 hr
Mar 11, 3:52 PM CST	Mesoscale Discussion	SPC	Adams, Bond, Brown, Bureau, Calhoun, Cass and 41 more	83 min

Nearby

Mesoscale Discussions in Wisconsin, 2006 Mesoscale Discussions in Illinois, 2006 Every mesoscale discussion in 2006

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.