Alert archive / South Dakota / Severe Thunderstorm Watches in 2003
Severe Thunderstorm Watch 742
The Storm Prediction Center issued this severe thunderstorm watch at Jul 13, 2003, 8:20 PM CDT for 28 counties in South Dakota. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 13, 2003, 8:20 PM CDT (01:20 UTC)
- Expired
- Jul 14, 2003, 1:00 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 28 counties
Aurora County, SD, Beadle County, SD, Brown County, SD, Brule County, SD, Buffalo County, SD, Campbell County, SD, Clark County, SD, Davison County, SD, Day County, SD, Dewey County, SD, Edmunds County, SD, Faulk County, SD, Hand County, SD, Hanson County, SD, Hughes County, SD, Hyde County, SD, Jerauld County, SD, Jones County, SD, Lyman County, SD, Marshall County, SD, McPherson County, SD, Miner County, SD, Potter County, SD, Sanborn County, SD, Spink County, SD, Stanley County, SD, Sully County, SD, Walworth County, SD
The radar
The Aberdeen radar (KABR), 136 km from the middle of the area, began a volume at 01:21 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.
Warnings issued inside it
7 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 13, 8:39 PM CDT | Severe Thunderstorm Warning | ABR | Campbell | 36 min |
| Jul 13, 9:05 PM CDT | Severe Thunderstorm Warning | ABR | Walworth | 25 min |
| Jul 13, 9:24 PM CDT | Severe Thunderstorm Warning | ABR | Campbell, Edmunds, McPherson | 51 min |
| Jul 13, 9:43 PM CDT | Severe Thunderstorm Warning | ABR | Walworth | 17 min |
| Jul 13, 10:13 PM CDT | Severe Thunderstorm Warning | ABR | Edmunds, McPherson | 62 min |
| Jul 13, 10:33 PM CDT | Severe Thunderstorm Warning | ABR | Brown | 57 min |
| Jul 13, 10:45 PM CDT | Severe Thunderstorm Warning | ABR | Faulk | 45 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 1.3 hours before the alert went out and 100 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
- 2251 J/kg
- Mixed-layer CIN
- -228 J/kg
- Mixed-layer LCL
- 1843 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 136 m²/s²
- 0-3 km storm-relative helicity
- 183 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 13, 10:36 PM CDT | Mesoscale Discussion | SPC | Brown, Clark, Day, Edmunds, Faulk, Spink | 84 min |
| Jul 14, 12:39 AM CDT | Mesoscale Discussion | SPC | Brown, Clark, Codington, Day, Deuel, Grant and 4 more | 36 min |
| Jul 14, 3:48 AM CDT | Mesoscale Discussion | SPC | Brown, Campbell, Day, Edmunds, Faulk, McPherson and 3 more | 57 min |
| Jul 14, 1:52 PM CDT | Mesoscale Discussion | SPC | Clay, Lincoln, McCook, Minnehaha, Moody, Turner and 2 more | 113 min |
Nearby
Severe Thunderstorm Watches in South Dakota, 2003Every severe thunderstorm watch 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.