Alert archive / South Dakota / Mesoscale Discussions in 2009
Mesoscale Discussion 343
The Storm Prediction Center issued this mesoscale discussion at Mar 31, 2009, 1:22 AM CDT for 4 states. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 31, 2009, 1:22 AM CDT (06:22 UTC)
- Expired
- Mar 31, 2009, 5:15 AM CDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
All 46 counties
Becker County, MN, Big Stone County, MN, Douglas County, MN, Grant County, MN, Lac qui Parle County, MN, Otter Tail County, MN, Pope County, MN, Stevens County, MN, Swift County, MN, Todd County, MN, Traverse County, MN, Wadena County, MN, Wilkin County, MN, Richland County, ND, Sargent County, ND, Keya Paha County, NE, Aurora County, SD, Beadle County, SD, Brookings County, SD, Brown 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, Edmunds County, SD, Faulk County, SD, Grant County, SD, Gregory County, SD, Hamlin County, SD, Hand County, SD, Hughes County, SD, Hyde County, SD, Jerauld County, SD, Kingsbury County, SD, Lyman County, SD, Marshall County, SD, Miner County, SD, Roberts County, SD, Sanborn County, SD, Spink County, SD, Tripp County, SD
The radar
The Aberdeen radar (KABR), 93 km from the middle of the area, began a volume at 06:25 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, 6.4 hours before the alert went out and 48 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 710 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 385 m²/s²
- 0-3 km storm-relative helicity
- 548 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 |
|---|---|---|---|---|
| Mar 31, 7:02 AM CDT | Mesoscale Discussion | SPC | Becker, Benton, Big Stone, Chippewa, Douglas, Grant and 18 more | 4 hr |
| Mar 31, 1:26 PM CDT | Mesoscale Discussion | SPC | Aitkin, Big Stone, Brown, Carlton, Cass, Cottonwood and 19 more | 3 hr |
| Mar 30, 7:59 PM CDT | Mesoscale Discussion | SPC | Blaine, Boyd, Brown, Cherry, Keya Paha, Rock | 4 hr |
Nearby
Mesoscale Discussions in South Dakota, 2009Mesoscale Discussions in Minnesota, 2009Mesoscale Discussions in North Dakota, 2009Every mesoscale discussion in 2009
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.