Alert archive / Minnesota / Mesoscale Discussions in 2004

Mesoscale Discussion 2167

September 5, 200425 counties in Minnesota; Burnett County, Polk County, Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Sep 5, 2004, 4:42 PM CDT for 25 counties in Minnesota; Burnett County, Polk County, Wisconsin. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Sep 5, 2004, 4:42 PM CDT (21:42 UTC)
Expired
Sep 5, 2004, 6:45 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 27 counties

Aitkin County, MN, Anoka County, MN, Becker County, MN, Benton County, MN, Carlton County, MN, Cass County, MN, Chisago County, MN, Crow Wing County, MN, Douglas County, MN, Grant County, MN, Hubbard County, MN, Isanti County, MN, Itasca County, MN, Kanabec County, MN, Mille Lacs County, MN, Morrison County, MN, Otter Tail County, MN, Pine County, MN, Pope County, MN, Sherburne County, MN, Stearns County, MN, Stevens County, MN, Swift County, MN, Todd County, MN, Wadena County, MN, Burnett County, WI, Polk County, WI

The radar

The Minneapolis radar (KMPX), 156 km from the middle of the area, began a volume at 21:44 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 12:00Z, 9.7 hours before the alert went out and 155 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 2004-09-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 246 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 2004-09-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 282 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
246 J/kg
Mixed-layer CIN
-36 J/kg
Mixed-layer LCL
698 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
282 m²/s²
0-3 km storm-relative helicity
329 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.2

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
Sep 5, 2:34 PM CDTMesoscale DiscussionSPCAnoka, Benton, Blue Earth, Brown, Carver, Cottonwood and 27 more56 min
Sep 5, 3:00 PM CDTTornado WatchSPCBlue Earth, Brown, Carver, Chippewa, Cottonwood, Dakota and 25 more6 hr
Sep 5, 5:39 PM CDTMesoscale DiscussionSPCBlue Earth, Brown, Carver, Cottonwood, Dakota, Faribault and 23 more96 min
Sep 5, 6:30 PM CDTMesoscale DiscussionSPCFillmore, Goodhue, Houston, Olmsted, Wabasha, Winona2 hr

Nearby

Mesoscale Discussions in Minnesota, 2004Mesoscale Discussions in Wisconsin, 2004Every mesoscale discussion in 2004

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.