Alert archive / Minnesota / Mesoscale Discussions in 2004

Mesoscale Discussion 362

April 18, 200446 counties in Minnesota; 9 counties in South Dakota; 17 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Apr 18, 2004, 2:37 AM CDT for 46 counties in Minnesota; 9 counties in South Dakota; 17 counties in Wisconsin. It was in force for 53 min.

The area

The outline as issued.

The facts

Issued
Apr 18, 2004, 2:37 AM CDT (07:37 UTC)
Expired
Apr 18, 2004, 3:30 AM CDT
In force
53 min
Issued by
the Storm Prediction Center
All 72 counties

Aitkin County, MN, Anoka County, MN, Benton County, MN, Big Stone County, MN, Brown County, MN, Carlton County, MN, Carver County, MN, Chippewa County, MN, Chisago County, MN, Crow Wing County, MN, Dakota County, MN, Douglas County, MN, Goodhue County, MN, Grant County, MN, Hennepin County, MN, Isanti County, MN, Kanabec County, MN, Kandiyohi County, MN, Lac qui Parle County, MN, Le Sueur County, MN, Lincoln County, MN, Lyon County, MN, McLeod County, MN, Meeker County, MN, Mille Lacs County, MN, Morrison County, MN, Murray County, MN, Nicollet County, MN, Pine County, MN, Pipestone County, MN, Pope County, MN, Ramsey County, MN, Redwood County, MN, Renville County, MN, Rice County, MN, Scott County, MN, Sherburne County, MN, Sibley County, MN, Stearns County, MN, Stevens County, MN, Swift County, MN, Todd County, MN, Traverse County, MN, Washington County, MN, Wright County, MN, Yellow Medicine County, MN, Brookings County, SD, Codington County, SD, Deuel County, SD, Grant County, SD, Hamlin County, SD, Kingsbury County, SD, Lake County, SD, Miner County, SD, Moody County, SD, Barron County, WI, Buffalo County, WI, Burnett County, WI, Chippewa County, WI, Clark County, WI, Douglas County, WI, Dunn County, WI, Eau Claire 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, Washburn County, WI

The radar

The Minneapolis radar (KMPX), 38 km from the middle of the area, began a volume at 07:37 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, 7.6 hours before the alert went out and 39 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 2004-04-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2004-04-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 91 square meters per square second.1939587897117Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2026 m above ground
0-6 km bulk shear
65 kt
0-1 km storm-relative helicity
91 m²/s²
0-3 km storm-relative helicity
489 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

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
Apr 17, 7:45 PM CDTSevere Thunderstorm WatchSPCBlue Earth, Dodge, Faribault, Fillmore, Freeborn, Houston and 7 more5 hr
Apr 17, 9:31 PM CDTMesoscale DiscussionSPCBlue Earth, Dodge, Faribault, Fillmore, Freeborn, Houston and 7 more119 min
Apr 17, 10:05 PM CDTTornado WatchSPCBlue Earth, Dodge, Faribault, Fillmore, Freeborn, Houston and 7 more5 hr
Apr 17, 11:10 PM CDTMesoscale DiscussionSPCBig Stone, Chippewa, Cottonwood, Grant, Jackson, Kandiyohi and 14 more95 min
Apr 17, 11:35 PM CDTSevere Thunderstorm WatchSPCBig Stone, Brown, Chippewa, Cottonwood, Jackson, Kandiyohi and 16 more5 hr
Apr 17, 11:50 PM CDTMesoscale DiscussionSPCBlue Earth, Dodge, Faribault, Fillmore, Freeborn, Houston and 7 more85 min
Apr 18, 12:30 AM CDTSevere Thunderstorm WatchSPCAnoka, Carver, Chisago, Dakota, Goodhue, Hennepin and 11 more5 hr
Apr 18, 4:43 AM CDTMesoscale DiscussionSPCAitkin, Benton, Carlton, Cass, Chisago, Crow Wing and 15 more32 min
Apr 18, 8:04 AM CDTMesoscale DiscussionSPCAitkin, Benton, Carlton, Cass, Crow Wing, Douglas and 6 more86 min
Apr 18, 12:39 PM CDTMesoscale DiscussionSPCAitkin, Anoka, Benton, Big Stone, Carlton, Carver and 32 more2 hr
Apr 18, 1:40 PM CDTTornado WatchSPCAitkin, Anoka, Benton, Carlton, Carver, Chippewa and 32 more6 hr
Apr 18, 2:20 PM CDTSevere Thunderstorm WatchSPCLincoln, Lyon, Pipestone, Rock6 hr
Apr 18, 3:33 PM CDTMesoscale DiscussionSPCAitkin, Anoka, Benton, Carlton, Chisago, Crow Wing and 12 more117 min
Apr 18, 4:15 PM CDTMesoscale DiscussionSPCBlue Earth, Brown, Cottonwood, Dodge, Faribault, Fillmore and 15 more60 min
Apr 18, 4:40 PM CDTTornado WatchSPCBlue Earth, Cottonwood, Dodge, Faribault, Freeborn, Jackson and 6 more5 hr
Apr 18, 5:23 PM CDTMesoscale DiscussionSPCLincoln, Lyon, Pipestone, Rock2 hr
Apr 18, 6:35 PM CDTTornado WatchSPCBrown, Carver, Dakota, Goodhue, Hennepin, Le Sueur and 7 more5 hr
Apr 18, 1:42 PM CDTMesoscale DiscussionSPCAurora, Beadle, Bennett, Brule, Buffalo, Charles Mix and 20 more3 hr
Apr 18, 1:49 AM CDTMesoscale DiscussionSPCCalumet, Columbia, Dane, Dodge, Fond du Lac, Green and 11 more56 min

Nearby

Mesoscale Discussions in Minnesota, 2004Mesoscale Discussions in Wisconsin, 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.