Alert archive / Wisconsin / Mesoscale Discussions in 2007

Mesoscale Discussion 1370

July 3, 200718 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Jul 3, 2007, 4:32 PM CDT for 18 counties in Wisconsin. It was in force for 58 min.

The area

The outline as issued.

The facts

Issued: Jul 3, 2007, 4:32 PM CDT (21:32 UTC)
Expired: Jul 3, 2007, 5:30 PM CDT
In force: 58 min
Issued by: the Storm Prediction Center

Counties Adams County, WI, Calumet County, WI, Columbia County, WI, Dodge County, WI, Fond du Lac County, WI, Green Lake County, WI, Juneau County, WI, Marathon County, WI, Marquette County, WI, Outagamie County, WI, Portage County, WI, Sauk County, WI, Shawano County, WI, Washington County, WI, Waupaca County, WI, Waushara County, WI, Winnebago County, WI, Wood County, WI

The radar

The Green Bay radar (KGRB), 65 km from the middle of the area, began a volume at 21:32 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 9.5 hours before the alert went out and 64 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1146 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 163 m²/s²
0-3 km storm-relative helicity: 194 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.

Issued	Product	Office	Counties	Lasted
Jul 3, 11:34 AM CDT	Mesoscale Discussion	SPC	Barron, Buffalo, Chippewa, Dunn, Eau Claire, Pepin and 4 more	86 min
Jul 3, 12:10 PM CDT	Tornado Watch	SPC	Adams, Ashland, Barron, Bayfield, Buffalo, Burnett and 21 more	8 hr
Jul 3, 4:56 PM CDT	Severe Thunderstorm Watch	SPC	Brown, Calumet, Columbia, Dane, Dodge, Fond du Lac and 19 more	4 hr
Jul 3, 5:50 PM CDT	Mesoscale Discussion	SPC	Adams, Ashland, Barron, Bayfield, Buffalo, Burnett and 21 more	55 min
Jul 3, 6:08 PM CDT	Tornado Watch	SPC	Adams, Buffalo, Clark, Columbia, Crawford, Dane and 16 more	6 hr

Nearby

Mesoscale Discussions in Wisconsin, 2007 Every mesoscale discussion in 2007

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.