Alert archive / South Dakota / Mesoscale Discussions in 2003
Mesoscale Discussion 1475
The Storm Prediction Center issued this mesoscale discussion at Jun 23, 2003, 6:24 PM CDT for Lyon County, Osceola County, Sioux County, Iowa; 16 counties in Minnesota; 20 counties in South Dakota. It was in force for 66 min.
The area
The outline as issued.
The facts
- Issued
- Jun 23, 2003, 6:24 PM CDT (23:24 UTC)
- Expired
- Jun 23, 2003, 7:30 PM CDT
- In force
- 66 min
- Issued by
- the Storm Prediction Center
All 39 counties
Lyon County, IA, Osceola County, IA, Sioux County, IA, Big Stone County, MN, Chippewa County, MN, Cottonwood County, MN, Kandiyohi County, MN, Lac qui Parle County, MN, Lincoln County, MN, Lyon County, MN, Meeker County, MN, Murray County, MN, Nobles County, MN, Pipestone County, MN, Redwood County, MN, Renville County, MN, Rock County, MN, Swift County, MN, Yellow Medicine County, MN, Aurora County, SD, Brookings County, SD, Charles Mix County, SD, Codington County, SD, Davison County, SD, Deuel County, SD, Douglas County, SD, Grant County, SD, Hamlin County, SD, Hanson County, SD, Hutchinson County, SD, Kingsbury County, SD, Lake County, SD, Lincoln County, SD, McCook County, SD, Miner County, SD, Minnehaha County, SD, Moody County, SD, Sanborn County, SD, Turner County, SD
The radar
The Sioux Falls radar (KFSD), 53 km from the middle of the area, began a volume at 23:26 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
Aberdeen, SD (KABR), launched 12:00Z, 11.4 hours before the alert went out and 145 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.
- Mixed-layer CAPE
- 2802 J/kg
- Mixed-layer CIN
- -26 J/kg
- Mixed-layer LCL
- 685 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 132 m²/s²
- 0-3 km storm-relative helicity
- 173 m²/s²
- Significant tornado parameter
- 2.1
- Supercell composite
- 10.9
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 22, 11:20 PM CDT | Severe Thunderstorm Watch | SPC | Cass, Fremont, Mills, Montgomery, Page, Pottawattamie | 6 hr |
| Jun 23, 6:45 PM CDT | Tornado Watch | SPC | Dickinson, Lyon, O'Brien, Osceola, Sioux | 4 hr |
| Jun 22, 8:05 PM CDT | Mesoscale Discussion | SPC | Big Stone, Chippewa, Douglas, Grant, Lac qui Parle, Otter Tail and 4 more | 55 min |
| Jun 23, 10:16 AM CDT | Mesoscale Discussion | SPC | Big Stone, Cass, Chippewa, Crow Wing, Douglas, Grant and 11 more | 119 min |
| Jun 23, 1:05 PM CDT | Severe Thunderstorm Watch | SPC | Aitkin, Benton, Carlton, Carver, Cass, Chippewa and 21 more | 6 hr |
| Jun 23, 2:43 PM CDT | Mesoscale Discussion | SPC | Anoka, Benton, Isanti, Kandiyohi, McLeod, Meeker and 6 more | 2 hr |
| Jun 23, 1:04 AM CDT | Mesoscale Discussion | SPC | Aurora, Beadle, Bon Homme, Brule, Buffalo, Charles Mix and 21 more | 116 min |
| Jun 23, 5:35 PM CDT | Tornado Watch | SPC | Bon Homme, Charles Mix, Clay, Hutchinson, Lincoln, Turner and 2 more | 5 hr |
Nearby
Mesoscale Discussions in South Dakota, 2003Mesoscale 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.