Alert archive / Minnesota / Mesoscale Discussions in 2007

Mesoscale Discussion 1371

July 3, 200741 counties in Minnesota; 27 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Jul 3, 2007, 5:50 PM CDT for 41 counties in Minnesota; 27 counties in Wisconsin. It was in force for 55 min.

The area

The outline as issued.

The facts

Issued
Jul 3, 2007, 5:50 PM CDT (22:50 UTC)
Expired
Jul 3, 2007, 6:45 PM CDT
In force
55 min
Issued by
the Storm Prediction Center
All 68 counties

Aitkin County, MN, Anoka County, MN, Benton County, MN, Blue Earth County, MN, Brown County, MN, Carlton County, MN, Carver County, MN, Chisago County, MN, Crow Wing County, MN, Dakota County, MN, Dodge County, MN, Faribault County, MN, Fillmore County, MN, Freeborn County, MN, Goodhue County, MN, Hennepin County, MN, Houston County, MN, Isanti County, MN, Kanabec County, MN, Le Sueur County, MN, Martin County, MN, McLeod County, MN, Meeker County, MN, Mille Lacs County, MN, Morrison County, MN, Mower County, MN, Nicollet County, MN, Olmsted County, MN, Pine County, MN, Ramsey County, MN, Rice County, MN, Scott County, MN, Sherburne County, MN, Sibley County, MN, Steele County, MN, Wabasha County, MN, Waseca County, MN, Washington County, MN, Watonwan County, MN, Winona County, MN, Wright County, MN, Adams County, WI, Ashland County, WI, Barron County, WI, Bayfield County, WI, Buffalo County, WI, Burnett County, WI, Chippewa County, WI, Clark County, WI, Douglas County, WI, Dunn County, WI, Eau Claire County, WI, Iron County, WI, Jackson County, WI, Juneau County, WI, La Crosse County, WI, Monroe County, WI, Pepin County, WI, Pierce County, WI, Polk County, WI, Price County, WI, Rusk County, WI, Saint Croix County, WI, Sawyer County, WI, Taylor County, WI, Trempealeau County, WI, Vernon County, WI, Washburn County, WI

The radar

The Minneapolis radar (KMPX), 76 km from the middle of the area, began a volume at 22:50 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

Minneapolis, MN (KMPX), launched 12:00Z, 10.8 hours before the alert went out and 79 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 12:00Z on 2007-07-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1198 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 12:00Z on 2007-07-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 45 square meters per square second.193958Sfc1 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
1198 J/kg
Mixed-layer CIN
-50 J/kg
Mixed-layer LCL
975 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
45 m²/s²
0-3 km storm-relative helicity
89 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

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
Jul 3, 6:39 AM CDTMesoscale DiscussionSPCBig Stone, Grant, Lac qui Parle, Stevens, Swift, Traverse and 1 more2 hr
Jul 3, 11:34 AM CDTMesoscale DiscussionSPCAnoka, Blue Earth, Brown, Carver, Chisago, Dakota and 23 more86 min
Jul 3, 12:10 PM CDTTornado WatchSPCAitkin, Anoka, Benton, Blue Earth, Brown, Carlton and 35 more8 hr
Jul 3, 2:00 PM CDTMesoscale DiscussionSPCAitkin, Becker, Beltrami, Cass, Clay, Clearwater and 12 more90 min
Jul 3, 3:36 PM CDTMesoscale DiscussionSPCJackson, Martin, Nobles, Rock84 min
Jul 3, 3:59 PM CDTTornado WatchSPCJackson, Nobles8 hr
Jul 3, 6:08 PM CDTTornado WatchSPCDodge, Fillmore, Houston, Mower, Olmsted, Wabasha and 1 more6 hr
Jul 3, 6:55 PM CDTMesoscale DiscussionSPCFaribault, Freeborn, Jackson, Martin, Nobles95 min
Jul 3, 4:32 PM CDTMesoscale DiscussionSPCAdams, Calumet, Columbia, Dodge, Fond du Lac, Green Lake and 12 more58 min
Jul 3, 4:56 PM CDTSevere Thunderstorm WatchSPCBrown, Calumet, Columbia, Dane, Dodge, Fond du Lac and 19 more4 hr

Nearby

Mesoscale Discussions in Minnesota, 2007Mesoscale Discussions in Wisconsin, 2007Every 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.