Alert archive / Minnesota / Mesoscale Discussions in 2003

Mesoscale Discussion 1504

June 25, 200314 counties in Iowa; 21 counties in Minnesota

The Storm Prediction Center issued this mesoscale discussion at Jun 25, 2003, 11:38 AM CDT for 14 counties in Iowa; 21 counties in Minnesota. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jun 25, 2003, 11:38 AM CDT (16:38 UTC)
Expired
Jun 25, 2003, 1:45 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 35 counties

Buena Vista County, IA, Calhoun County, IA, Carroll County, IA, Clay County, IA, Emmet County, IA, Greene County, IA, Hancock County, IA, Humboldt County, IA, Kossuth County, IA, Palo Alto County, IA, Pocahontas County, IA, Sac County, IA, Webster County, IA, Winnebago County, IA, Anoka County, MN, Blue Earth County, MN, Carver County, MN, Dakota County, MN, Faribault County, MN, Freeborn County, MN, Hennepin County, MN, Isanti County, MN, Le Sueur County, MN, Martin County, MN, McLeod County, MN, Nicollet County, MN, Ramsey County, MN, Rice County, MN, Scott County, MN, Sibley County, MN, Steele County, MN, Waseca County, MN, Washington County, MN, Watonwan County, MN, Wright County, MN

The radar

The Minneapolis radar (KMPX), 113 km from the middle of the area, began a volume at 16:41 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

Omaha, NE (KOAX), launched 12:00Z, 4.6 hours before the alert went out and 344 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, Omaha, NE at 12:00Z on 2003-06-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2110 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, Omaha, NE at 12:00Z on 2003-06-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 212 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
2110 J/kg
Mixed-layer CIN
-19 J/kg
Mixed-layer LCL
753 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
212 m²/s²
0-3 km storm-relative helicity
187 m²/s²
Significant tornado parameter
1.4
Supercell composite
7.3

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
Jun 24, 8:35 PM CDTTornado WatchSPCLyon, Sioux5 hr
Jun 24, 10:27 PM CDTMesoscale DiscussionSPCDickinson, Lyon, O'Brien, Osceola, Plymouth, Sioux93 min
Jun 24, 10:55 PM CDTTornado WatchSPCBuena Vista, Cerro Gordo, Cherokee, Clay, Dickinson, Emmet and 11 more5 hr
Jun 25, 12:37 AM CDTMesoscale DiscussionSPCBoone, Butler, Calhoun, Carroll, Chickasaw, Crawford and 12 more113 min
Jun 25, 10:36 AM CDTMesoscale DiscussionSPCAdams, Appanoose, Benton, Cass, Clarke, Davis and 24 more114 min
Jun 25, 11:50 AM CDTMesoscale DiscussionSPCAppanoose, Cedar, Clinton, Davis, Delaware, Des Moines and 18 more115 min
Jun 25, 12:05 PM CDTSevere Thunderstorm WatchSPCAppanoose, Benton, Buchanan, Cedar, Clayton, Clinton and 26 more6 hr
Jun 25, 2:43 PM CDTMesoscale DiscussionSPCAppanoose, Cedar, Clinton, Davis, Decatur, Des Moines and 20 more2 hr
Jun 24, 7:09 PM CDTMesoscale DiscussionSPCAitkin, Anoka, Benton, Big Stone, Carlton, Carver and 31 more66 min
Jun 24, 7:15 PM CDTSevere Thunderstorm WatchSPCBig Stone, Clay, Traverse, Wilkin6 hr
Jun 24, 8:15 PM CDTTornado WatchSPCAnoka, Benton, Brown, Carver, Chippewa, Chisago and 35 more6 hr
Jun 24, 9:52 PM CDTMesoscale DiscussionSPCBig Stone, Clay, Traverse, Wilkin83 min

Nearby

Mesoscale Discussions in Minnesota, 2003Mesoscale Discussions in Iowa, 2003Every mesoscale discussion in 2003

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.