Alert archive / Wisconsin / Mesoscale Discussions in 2013

Mesoscale Discussion 718

May 19, 20134 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at May 19, 2013, 9:38 PM CDT for 4 counties in Wisconsin. It was in force for 67 min.

The area

The outline as issued.

The facts

Issued
May 19, 2013, 9:38 PM CDT (02:38 UTC)
Expired
May 19, 2013, 10:45 PM CDT
In force
67 min
Issued by
the Storm Prediction Center

Counties Chippewa County, WI, Iron County, WI, Price County, WI, Rusk County, WI

The radar

The Duluth radar (KDLH), 164 km from the middle of the area, began a volume at 02:38 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, 2.6 hours before the alert went out and 230 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 2013-05-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 174 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 2013-05-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 12 square meters per square second.19395878Sfc1 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
174 J/kg
Mixed-layer CIN
-39 J/kg
Mixed-layer LCL
751 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
12 m²/s²
0-3 km storm-relative helicity
58 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.

IssuedProductOfficeCountiesLasted
May 19, 7:46 PM CDTMesoscale DiscussionSPCAdams, Columbia, Crawford, Dane, Grant, Green and 13 more59 min
May 19, 8:10 PM CDTTornado WatchSPCAdams, Buffalo, Clark, Columbia, Crawford, Dane and 19 more6 hr
May 19, 8:21 PM CDTMesoscale DiscussionSPCPierce, Saint Croix54 min
May 19, 10:58 PM CDTMesoscale DiscussionSPCAdams, Clark, Columbia, Crawford, Dane, Dodge and 20 more62 min
May 20, 1:41 AM CDTMesoscale DiscussionSPCAdams, Columbia, Dane, Dodge, Fond du Lac, Green and 6 more79 min

Nearby

Mesoscale Discussions in Wisconsin, 2013Every mesoscale discussion in 2013

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.