Alert archive / Minnesota / Mesoscale Discussions in 2004

Mesoscale Discussion 2367

October 29, 200416 counties in Minnesota; 9 counties in North Dakota; 4 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Oct 29, 2004, 2:57 PM CDT for 16 counties in Minnesota; 9 counties in North Dakota; 4 counties in South Dakota. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued
Oct 29, 2004, 2:57 PM CDT (19:57 UTC)
Expired
Oct 29, 2004, 5:30 PM CDT
In force
3 hr
Issued by
the Storm Prediction Center
All 29 counties

Aitkin County, MN, Becker County, MN, Carlton County, MN, Cass County, MN, Clay County, MN, Crow Wing County, MN, Douglas County, MN, Grant County, MN, Hubbard County, MN, Itasca County, MN, Mahnomen County, MN, Otter Tail County, MN, Todd County, MN, Traverse County, MN, Wadena County, MN, Wilkin County, MN, Barnes County, ND, Cass County, ND, Dickey County, ND, LaMoure County, ND, Logan County, ND, McIntosh County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Brown County, SD, Marshall County, SD, McPherson County, SD, Roberts County, SD

The radar

The Fargo/Grand Forks radar (KMVX), 174 km from the middle of the area, began a volume at 19:59 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, 8.0 hours before the alert went out and 240 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 2004-10-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1021 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 2004-10-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 89 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
1021 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
508 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
89 m²/s²
0-3 km storm-relative helicity
136 m²/s²
Significant tornado parameter
0.5
Supercell composite
2.3

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
Oct 29, 10:08 AM CDTMesoscale DiscussionSPCBig Stone, Grant, Lac qui Parle, Pope, Stevens, Swift and 1 more3 hr
Oct 29, 2:12 PM CDTMesoscale DiscussionSPCFaribault, Jackson, Martin3 hr
Oct 29, 3:19 PM CDTMesoscale DiscussionSPCAnoka, Benton, Blue Earth, Carver, Chisago, Dakota and 23 more116 min
Oct 29, 3:35 PM CDTTornado WatchSPCAnoka, Benton, Blue Earth, Brown, Carver, Chisago and 34 more5 hr
Oct 29, 5:46 PM CDTMesoscale DiscussionSPCHouston, Winona89 min
Oct 29, 6:10 PM CDTMesoscale DiscussionSPCAnoka, Benton, Chisago, Dakota, Dodge, Fillmore and 18 more95 min
Oct 29, 6:30 PM CDTTornado WatchSPCFillmore, Houston, Winona6 hr

Nearby

Mesoscale Discussions in Minnesota, 2004Mesoscale Discussions in North Dakota, 2004Mesoscale Discussions in South Dakota, 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.