Alert archive / Wisconsin / Mesoscale Discussions in 2018

Mesoscale Discussion 754

June 16, 201813 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Jun 16, 2018, 3:22 PM CDT for 13 counties in Wisconsin. It was in force for 53 min.

The area

The outline as issued.

The facts

Issued
Jun 16, 2018, 3:22 PM CDT (20:22 UTC)
Expired
Jun 16, 2018, 4:15 PM CDT
In force
53 min
Issued by
the Storm Prediction Center
Chance of a watch
20%

Counties Adams County, WI, Columbia County, WI, Dane County, WI, Green County, WI, Iowa County, WI, Juneau County, WI, Lafayette County, WI, Marquette County, WI, Portage County, WI, Richland County, WI, Sauk County, WI, Waushara County, WI, Wood County, WI

The radar

The La Crosse radar (KARX), 112 km from the middle of the area, began a volume at 20:24 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, 8.4 hours before the alert went out and 176 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, Green Bay/Straub, WI at 12:00Z on 2018-06-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 823 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, Green Bay/Straub, WI at 12:00Z on 2018-06-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 138 square meters per square second.1939Sfc1 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
823 J/kg
Mixed-layer CIN
-222 J/kg
Mixed-layer LCL
930 m above ground
0-6 km bulk shear
8 kt
0-1 km storm-relative helicity
138 m²/s²
0-3 km storm-relative helicity
160 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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Nearby

Mesoscale Discussions in Wisconsin, 2018Every mesoscale discussion in 2018

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.