Alert archive / Wisconsin / Mesoscale Discussions in 2014

Mesoscale Discussion 1475

July 26, 20149 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Jul 26, 2014, 8:58 PM CDT for 9 counties in Wisconsin. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued
Jul 26, 2014, 8:58 PM CDT (01:58 UTC)
Expired
Jul 26, 2014, 10:30 PM CDT
In force
92 min
Issued by
the Storm Prediction Center
Chance of a watch
20%

Counties Barron County, WI, Chippewa County, WI, Lincoln County, WI, Oneida County, WI, Price County, WI, Rusk County, WI, Sawyer County, WI, Taylor County, WI, Washburn County, WI

The radar

The Duluth radar (KDLH), 172 km from the middle of the area, began a volume at 01:57 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, 2.0 hours before the alert went out and 220 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 2014-07-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1707 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 00:00Z on 2014-07-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 73 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
1707 J/kg
Mixed-layer CIN
-8 J/kg
Mixed-layer LCL
1223 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
73 m²/s²
0-3 km storm-relative helicity
94 m²/s²
Significant tornado parameter
0.7
Supercell composite
5.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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Nearby

Mesoscale Discussions in Wisconsin, 2014Every mesoscale discussion in 2014

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.