Alert archive / South Dakota / Mesoscale Discussions in 2003

Mesoscale Discussion 1599

July 4, 2003Traverse County, Minnesota; 9 counties in North Dakota; 14 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jul 4, 2003, 12:25 AM CDT for Traverse County, Minnesota; 9 counties in North Dakota; 14 counties in South Dakota. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jul 4, 2003, 12:25 AM CDT (05:25 UTC)
Expired
Jul 4, 2003, 2:30 AM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 24 counties

Traverse County, MN, Dickey County, ND, Emmons County, ND, LaMoure County, ND, Logan County, ND, McIntosh County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Sioux County, ND, Brown County, SD, Campbell County, SD, Corson County, SD, Day County, SD, Dewey County, SD, Edmunds County, SD, Faulk County, SD, Grant County, SD, Marshall County, SD, McPherson County, SD, Potter County, SD, Roberts County, SD, Spink County, SD, Walworth County, SD

The radar

The Aberdeen radar (KABR), 62 km from the middle of the area, began a volume at 05:25 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

Aberdeen, SD (KABR), launched 00:00Z, 5.4 hours before the alert went out and 114 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, Aberdeen, SD at 00:00Z on 2003-07-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1927 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, Aberdeen, SD at 00:00Z on 2003-07-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 33 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
1927 J/kg
Mixed-layer CIN
-22 J/kg
Mixed-layer LCL
1633 m above ground
0-6 km bulk shear
61 kt
0-1 km storm-relative helicity
33 m²/s²
0-3 km storm-relative helicity
201 m²/s²
Significant tornado parameter
0.3
Supercell composite
2.8

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, 8:11 PM CDTMesoscale DiscussionSPCJackson, Nobles, Rock94 min
Jul 3, 9:40 PM CDTSevere Thunderstorm WatchSPCBig Stone, Blue Earth, Brown, Chippewa, Cottonwood, Douglas and 23 more6 hr
Jul 3, 10:22 PM CDTMesoscale DiscussionSPCBecker, Clay, Douglas, Grant, Hubbard, Otter Tail and 3 more23 min
Jul 3, 10:40 PM CDTSevere Thunderstorm WatchSPCAitkin, Becker, Carlton, Cass, Clay, Crow Wing and 14 more5 hr
Jul 3, 11:23 PM CDTMesoscale DiscussionSPCAitkin, Anoka, Becker, Benton, Carlton, Carver and 44 more97 min
Jul 4, 12:42 AM CDTMesoscale DiscussionSPCAnoka, Benton, Blue Earth, Brown, Carver, Chippewa and 38 more63 min
Jul 4, 1:15 AM CDTSevere Thunderstorm WatchSPCAnoka, Blue Earth, Carver, Chisago, Dakota, Dodge and 23 more6 hr
Jul 4, 3:27 AM CDTMesoscale DiscussionSPCFillmore, Goodhue, Houston, Olmsted, Ramsey, Wabasha and 2 more93 min
Jul 3, 7:55 PM CDTSevere Thunderstorm WatchSPCBarnes, Burleigh, Dickey, Eddy, Emmons, Foster and 13 more4 hr
Jul 4, 2:51 PM CDTMesoscale DiscussionSPCBennett, Custer, Fall River, Jackson, Lawrence, Meade and 2 more114 min
Jul 4, 3:20 PM CDTSevere Thunderstorm WatchSPCBennett, Butte, Custer, Dewey, Fall River, Haakon and 14 more6 hr
Jul 4, 5:55 PM CDTMesoscale DiscussionSPCBeadle, Buffalo, Butte, Clark, Codington, Custer and 23 more95 min

Nearby

Mesoscale Discussions in South Dakota, 2003Mesoscale Discussions in North Dakota, 2003Mesoscale Discussions in Minnesota, 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.