Alert archive / South Dakota / Mesoscale Discussions in 2004
Mesoscale Discussion 1850
The Storm Prediction Center issued this mesoscale discussion at Aug 3, 2004, 5:04 AM CDT for 8 counties in South Dakota. It was in force for 116 min.
The area
The outline as issued.
The facts
- Issued
- Aug 3, 2004, 5:04 AM CDT (10:04 UTC)
- Expired
- Aug 3, 2004, 7:00 AM CDT
- In force
- 116 min
- Issued by
- the Storm Prediction Center
Counties Buffalo County, SD, Haakon County, SD, Hughes County, SD, Hyde County, SD, Jones County, SD, Lyman County, SD, Stanley County, SD, Sully County, SD
The radar
The Rapid City radar (KUDX), 167 km from the middle of the area, began a volume at 10:05 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
Rapid City, SD (KUNR), launched 00:00Z, 10.1 hours before the alert went out and 172 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
- 603 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 2685 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 22 m²/s²
- 0-3 km storm-relative helicity
- 160 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.6
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 2, 7:47 PM CDT | Mesoscale Discussion | SPC | Aurora, Bennett, Bon Homme, Brule, Buffalo, Charles Mix and 19 more | 58 min |
| Aug 2, 9:07 PM CDT | Mesoscale Discussion | SPC | Butte, Harding, Lawrence, Meade | 53 min |
| Aug 3, 2:02 AM CDT | Mesoscale Discussion | SPC | Aurora, Beadle, Bon Homme, Brule, Buffalo, Charles Mix and 17 more | 118 min |
| Aug 3, 2:30 AM CDT | Mesoscale Discussion | SPC | Haakon, Hughes, Jones, Meade, Stanley, Ziebach | 2 hr |
| Aug 3, 3:00 AM CDT | Severe Thunderstorm Watch | SPC | Buffalo, Haakon, Hughes, Hyde, Jones, Lyman and 4 more | 5 hr |
| Aug 3, 7:21 AM CDT | Mesoscale Discussion | SPC | Aurora, Beadle, Brule, Buffalo, Davison, Douglas and 17 more | 54 min |
| Aug 3, 8:00 AM CDT | Severe Thunderstorm Watch | SPC | Aurora, Beadle, Brule, Buffalo, Davison, Douglas and 14 more | 5 hr |
| Aug 3, 10:48 AM CDT | Mesoscale Discussion | SPC | Lincoln, Minnehaha, Moody, Turner | 87 min |
| Aug 3, 2:53 PM CDT | Mesoscale Discussion | SPC | Butte, Custer, Harding, Lawrence, Meade, Pennington and 1 more | 2 hr |
Nearby
Mesoscale Discussions in South Dakota, 2004Every mesoscale discussion in 2004
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.