Alert archive / South Dakota / Mesoscale Discussions in 2007
Mesoscale Discussion 1638
The Storm Prediction Center issued this mesoscale discussion at Aug 3, 2007, 8:02 PM CDT for 14 counties in Nebraska; 20 counties in South Dakota. It was in force for 118 min.
The area
The outline as issued.
The facts
- Issued
- Aug 3, 2007, 8:02 PM CDT (01:02 UTC)
- Expired
- Aug 3, 2007, 10:00 PM CDT
- In force
- 118 min
- Issued by
- the Storm Prediction Center
All 34 counties
Antelope County, NE, Blaine County, NE, Boyd County, NE, Brown County, NE, Cherry County, NE, Garfield County, NE, Holt County, NE, Hooker County, NE, Keya Paha County, NE, Knox County, NE, Loup County, NE, Rock County, NE, Thomas County, NE, Wheeler County, NE, Aurora County, SD, Bon Homme County, SD, Brule County, SD, Buffalo County, SD, Charles Mix County, SD, Davison County, SD, Douglas County, SD, Gregory County, SD, Hanson County, SD, Hughes County, SD, Hutchinson County, SD, Hyde County, SD, Jerauld County, SD, Jones County, SD, Lyman County, SD, Mellette County, SD, Sanborn County, SD, Stanley County, SD, Todd County, SD, Tripp County, SD
The radar
The North Platte radar (KLNX), 154 km from the middle of the area, began a volume at 01:02 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, 1.0 hours before the alert went out and 219 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
- 1787 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- -42 m²/s²
- 0-3 km storm-relative helicity
- -15 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 |
|---|---|---|---|---|
| Aug 4, 1:49 AM CDT | Mesoscale Discussion | SPC | Burt, Cedar, Cuming, Dakota, Dixon, Knox and 2 more | 86 min |
| Aug 4, 2:51 PM CDT | Mesoscale Discussion | SPC | Antelope, Boone, Burt, Cedar, Cuming, Dakota and 13 more | 114 min |
| Aug 4, 3:55 PM CDT | Severe Thunderstorm Watch | SPC | Antelope, Boone, Burt, Butler, Cass, Cedar and 18 more | 6 hr |
| Aug 4, 5:06 PM CDT | Mesoscale Discussion | SPC | Chase, Custer, Dawson, Dundy, Frontier, Garfield and 12 more | 114 min |
| Aug 4, 5:46 PM CDT | Severe Thunderstorm Watch | SPC | Blaine, Buffalo, Custer, Dawson, Frontier, Garfield and 12 more | 4 hr |
| Aug 4, 6:09 PM CDT | Mesoscale Discussion | SPC | Burt, Cass, Cedar, Colfax, Cuming, Dakota and 13 more | 66 min |
Nearby
Mesoscale Discussions in South Dakota, 2007Mesoscale Discussions in Nebraska, 2007Every mesoscale discussion in 2007
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.