Alert archive / South Dakota / Mesoscale Discussions in 2003

Mesoscale Discussion 1656

July 6, 200321 counties in Minnesota; 31 counties in South Dakota

The Storm Prediction Center issued this mesoscale discussion at Jul 6, 2003, 4:56 PM CDT for 21 counties in Minnesota; 31 counties in South Dakota. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jul 6, 2003, 4:56 PM CDT (21:56 UTC)
Expired
Jul 6, 2003, 7:00 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 52 counties

Benton County, MN, Big Stone County, MN, Chippewa County, MN, Kanabec County, MN, Kandiyohi County, MN, Lac qui Parle County, MN, Lincoln County, MN, Lyon County, MN, Meeker County, MN, Mille Lacs County, MN, Murray County, MN, Pipestone County, MN, Pope County, MN, Redwood County, MN, Renville County, MN, Rock County, MN, Sherburne County, MN, Stearns County, MN, Stevens County, MN, Swift County, MN, Yellow Medicine County, MN, Aurora County, SD, Beadle County, SD, Brookings County, SD, Brule County, SD, Buffalo County, SD, Charles Mix County, SD, Clark County, SD, Codington County, SD, Davison County, SD, Day County, SD, Deuel County, SD, Douglas County, SD, Faulk County, SD, Grant County, SD, Gregory County, SD, Hamlin County, SD, Hand County, SD, Hanson County, SD, Hutchinson County, SD, Jerauld County, SD, Kingsbury County, SD, Lake County, SD, Lincoln County, SD, McCook County, SD, Miner County, SD, Minnehaha County, SD, Moody County, SD, Roberts County, SD, Sanborn County, SD, Spink County, SD, Turner County, SD

The radar

The Aberdeen radar (KABR), 118 km from the middle of the area, began a volume at 21:58 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, 9.9 hours before the alert went out and 312 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 2003-07-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 735 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 2003-07-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -24 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
735 J/kg
Mixed-layer CIN
-63 J/kg
Mixed-layer LCL
1169 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
-24 m²/s²
0-3 km storm-relative helicity
-10 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 5, 8:04 PM CDTMesoscale DiscussionSPCBrown, Chippewa, Cottonwood, Jackson, Lac qui Parle, Lincoln and 9 more86 min
Jul 6, 4:08 AM CDTMesoscale DiscussionSPCBeltrami, Clearwater, Koochiching, Pennington, Polk, Red Lake2 hr
Jul 6, 5:17 AM CDTMesoscale DiscussionSPCDodge, Goodhue, Houston, Olmsted, Wabasha, Winona118 min
Jul 6, 12:56 PM CDTMesoscale DiscussionSPCAitkin, Carlton, Itasca, Koochiching, Lake of the Woods, Saint Louis109 min
Jul 6, 1:40 PM CDTMesoscale DiscussionSPCBecker, Beltrami, Clay, Clearwater, Mahnomen, Marshall and 4 more3 hr
Jul 6, 2:20 PM CDTTornado WatchSPCAitkin, Becker, Beltrami, Cass, Clay, Clearwater and 11 more8 hr
Jul 6, 5:29 PM CDTMesoscale DiscussionSPCAitkin, Becker, Beltrami, Cass, Clay, Clearwater and 11 more2 hr
Jul 6, 6:54 PM CDTMesoscale DiscussionSPCAnoka, Benton, Carlton, Chisago, Cook, Douglas and 14 more4 hr
Jul 5, 7:20 PM CDTTornado WatchSPCBon Homme, Charles Mix, Clay, Douglas, Gregory, Hutchinson and 7 more6 hr
Jul 5, 7:23 PM CDTMesoscale DiscussionSPCAurora, Beadle, Brown, Brule, Buffalo, Campbell and 19 more97 min

Nearby

Mesoscale Discussions in South 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.