Alert archive / Wisconsin / Mesoscale Discussions in 2019

Mesoscale Discussion 57

January 27, 2019Allamakee County, Winneshiek County, Iowa; 14 counties in Minnesota; 44 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Jan 27, 2019, 7:04 PM CST for Allamakee County, Winneshiek County, Iowa; 14 counties in Minnesota; 44 counties in Wisconsin. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Jan 27, 2019, 7:04 PM CST (01:04 UTC)
Expired
Jan 28, 2019, 1:00 AM CST
In force
6 hr
Issued by
the Storm Prediction Center
All 60 counties

Allamakee County, IA, Winneshiek County, IA, Anoka County, MN, Dakota County, MN, Dodge County, MN, Fillmore County, MN, Goodhue County, MN, Hennepin County, MN, Houston County, MN, Olmsted County, MN, Ramsey County, MN, Rice County, MN, Scott County, MN, Wabasha County, MN, Washington County, MN, Winona County, MN, Adams County, WI, Buffalo County, WI, Calumet County, WI, Chippewa County, WI, Clark County, WI, Columbia County, WI, Crawford County, WI, Dane County, WI, Dodge County, WI, Dunn County, WI, Eau Claire County, WI, Fond du Lac County, WI, Grant County, WI, Green County, WI, Green Lake County, WI, Iowa County, WI, Jackson County, WI, Jefferson County, WI, Juneau County, WI, Kenosha County, WI, La Crosse County, WI, Lafayette County, WI, Marathon County, WI, Marquette County, WI, Milwaukee County, WI, Monroe County, WI, Outagamie County, WI, Ozaukee County, WI, Pepin County, WI, Pierce County, WI, Portage County, WI, Richland County, WI, Rock County, WI, Saint Croix County, WI, Sauk County, WI, Trempealeau County, WI, Vernon 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 La Crosse radar (KARX), 29 km from the middle of the area, began a volume at 01:07 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 00:00Z, 1.1 hours before the alert went out and 246 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 00:00Z on 2019-01-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 00:00Z on 2019-01-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 267 square meters per square second.1939587897Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1136 m above ground
0-6 km bulk shear
68 kt
0-1 km storm-relative helicity
267 m²/s²
0-3 km storm-relative helicity
623 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jan 28, 2:42 AM CSTMesoscale DiscussionSPCColumbia, Dane, Dodge, Fond du Lac, Green, Jefferson and 9 more4 hr

Nearby

Mesoscale Discussions in Wisconsin, 2019Mesoscale Discussions in Minnesota, 2019Mesoscale Discussions in Iowa, 2019Every mesoscale discussion in 2019

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.