Alert archive / Wisconsin / Mesoscale Discussions in 2005

Mesoscale Discussion 2312

October 4, 20054 states

The Storm Prediction Center issued this mesoscale discussion at Oct 4, 2005, 3:28 PM CDT for 4 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Oct 4, 2005, 3:28 PM CDT (20:28 UTC)
Expired
Oct 4, 2005, 5:30 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 41 counties

Allamakee County, IA, Howard County, IA, Winneshiek County, IA, Delta County, MI, Dickinson County, MI, Iron County, MI, Menominee County, MI, Fillmore County, MN, Houston County, MN, Olmsted County, MN, Wabasha County, MN, Winona County, MN, Adams County, WI, Buffalo County, WI, Chippewa County, WI, Clark County, WI, Door County, WI, Eau Claire County, WI, Florence County, WI, Forest County, WI, Jackson County, WI, Juneau County, WI, La Crosse County, WI, Langlade County, WI, Lincoln County, WI, Marathon County, WI, Marinette County, WI, Menominee County, WI, Monroe County, WI, Oconto County, WI, Oneida County, WI, Pepin County, WI, Portage County, WI, Shawano County, WI, Taylor County, WI, Trempealeau County, WI, Vernon County, WI, Vilas County, WI, Waupaca County, WI, Waushara County, WI, Wood County, WI

The radar

The Green Bay radar (KGRB), 125 km from the middle of the area, began a volume at 20:28 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

Minneapolis, MN (KMPX), launched 12:00Z, 8.5 hours before the alert went out and 327 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, Minneapolis, MN at 12:00Z on 2005-10-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1230 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, Minneapolis, MN at 12:00Z on 2005-10-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 189 square meters per square second.193958Sfc1 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
1230 J/kg
Mixed-layer CIN
-49 J/kg
Mixed-layer LCL
492 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
189 m²/s²
0-3 km storm-relative helicity
185 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.3

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.

IssuedProductOfficeCountiesLasted
Oct 4, 4:02 PM CDTMesoscale DiscussionSPCBuena Vista, Calhoun, Carroll, Cherokee, Clay, Crawford and 14 more118 min
Oct 4, 4:05 PM CDTSevere Thunderstorm WatchSPCBuena Vista, Cherokee, Clay, Dickinson, Emmet, Ida and 11 more7 hr
Oct 4, 5:28 PM CDTMesoscale DiscussionSPCBuena Vista, Cherokee, Clay, Dickinson, Emmet, Ida and 11 more3 hr
Oct 3, 9:30 PM CDTMesoscale DiscussionSPCAitkin, Carlton, Crow Wing, Kanabec, Mille Lacs, Morrison and 1 more2 hr
Oct 4, 6:43 PM CDTMesoscale DiscussionSPCBlue Earth, Brown, Cottonwood, Dakota, Dodge, Faribault and 17 more2 hr

Nearby

Mesoscale Discussions in Wisconsin, 2005Mesoscale Discussions in Minnesota, 2005Mesoscale Discussions in Michigan, 2005Every mesoscale discussion in 2005

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.