Alert archive / Wisconsin / Mesoscale Discussions in 2006

Mesoscale Discussion 885

May 17, 20064 states

The Storm Prediction Center issued this mesoscale discussion at May 17, 2006, 12:00 PM CDT for 4 states. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued: May 17, 2006, 12:00 PM CDT (17:00 UTC)
Expired: May 17, 2006, 1:30 PM CDT
In force: 90 min
Issued by: the Storm Prediction Center

All 61 counties

Boone County, IL, Bureau County, IL, Carroll County, IL, Cook County, IL, DeKalb County, IL, DuPage County, IL, Grundy County, IL, Jo Daviess County, IL, Kane County, IL, Kankakee County, IL, Kendall County, IL, Lake County, IL, LaSalle County, IL, Lee County, IL, McHenry County, IL, Ogle County, IL, Putnam County, IL, Stephenson County, IL, Whiteside County, IL, Will County, IL, Winnebago County, IL, Lake County, IN, LaPorte County, IN, Marshall County, IN, Newton County, IN, Porter County, IN, Saint Joseph County, IN, Starke County, IN, Berrien County, MI, Adams County, WI, Brown County, WI, Calumet County, WI, Columbia County, WI, Dane County, WI, Dodge County, WI, Fond du Lac County, WI, Green County, WI, Green Lake County, WI, Iowa County, WI, Jefferson County, WI, Juneau County, WI, Kenosha County, WI, Lafayette County, WI, Manitowoc County, WI, Marquette County, WI, Milwaukee County, WI, Outagamie County, WI, Ozaukee County, WI, Portage County, WI, Racine County, WI, Richland County, WI, Rock County, WI, Sauk County, WI, Sheboygan County, WI, Walworth County, WI, Washington County, WI, Waukesha County, WI, Waupaca County, WI, Waushara County, WI, Winnebago County, WI, Wood County, WI

The radar

The Milwaukee radar (KMKX), 45 km from the middle of the area, began a volume at 17:00 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 12:00Z, 5.0 hours before the alert went out and 206 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: 33 J/kg
Mixed-layer CIN: -90 J/kg
Mixed-layer LCL: 1253 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 44 m²/s²
0-3 km storm-relative helicity: 62 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
May 17, 12:36 PM CDT	Severe Thunderstorm Watch	SPC	Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 15 more	6 hr
May 17, 1:56 PM CDT	Mesoscale Discussion	SPC	Iroquois, Vermilion	94 min
May 17, 2:46 PM CDT	Severe Thunderstorm Watch	SPC	Champaign, Christian, Coles, DeWitt, Douglas, Edgar and 19 more	6 hr
May 17, 5:39 PM CDT	Mesoscale Discussion	SPC	Boone, Bureau, Carroll, Champaign, Christian, Clark and 43 more	96 min

Nearby

Mesoscale Discussions in Wisconsin, 2006 Mesoscale Discussions in Illinois, 2006 Mesoscale Discussions in Indiana, 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.