Alert archive / North Dakota / Severe Thunderstorm Watches in 2004
Severe Thunderstorm Watch 717
The Storm Prediction Center issued this severe thunderstorm watch at Aug 7, 2004, 1:00 PM MDT for 23 counties in North Dakota; 5 counties in South Dakota. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 7, 2004, 1:00 PM MDT (19:00 UTC)
- Expired
- Aug 7, 2004, 8:00 PM MDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
All 28 counties
Adams County, ND, Billings County, ND, Bottineau County, ND, Bowman County, ND, Burke County, ND, Divide County, ND, Dunn County, ND, Golden Valley County, ND, Grant County, ND, Hettinger County, ND, McHenry County, ND, McKenzie County, ND, McLean County, ND, Mercer County, ND, Morton County, ND, Mountrail County, ND, Oliver County, ND, Renville County, ND, Sioux County, ND, Slope County, ND, Stark County, ND, Ward County, ND, Williams County, ND, Corson County, SD, Dewey County, SD, Harding County, SD, Perkins County, SD, Ziebach County, SD
The radar
The Bismarck radar (KBIS), 149 km from the middle of the area, began a volume at 19:04 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
16 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 1:13 PM MDT | Severe Thunderstorm Warning | UNR | Harding | 62 min |
| Aug 7, 1:45 PM MDT | Severe Thunderstorm Warning | BIS | Bowman | 60 min |
| Aug 7, 1:49 PM MDT | Severe Thunderstorm Warning | UNR | Harding | 56 min |
| Aug 7, 2:03 PM MDT | Severe Thunderstorm Warning | BIS | McKenzie, Williams | 57 min |
| Aug 7, 2:20 PM MDT | Severe Thunderstorm Warning | BIS | Slope | 55 min |
| Aug 7, 2:45 PM MDT | Severe Thunderstorm Warning | UNR | Harding | 60 min |
| Aug 7, 3:11 PM MDT | Severe Thunderstorm Warning | BIS | Hettinger | 64 min |
| Aug 7, 3:17 PM MDT | Severe Thunderstorm Warning | BIS | Williams | 63 min |
| Aug 7, 3:23 PM MDT | Severe Thunderstorm Warning | BIS | Dunn | 52 min |
| Aug 7, 4:16 PM MDT | Severe Thunderstorm Warning | BIS | Mercer | 59 min |
| Aug 7, 4:24 PM MDT | Severe Thunderstorm Warning | BIS | Divide, Williams | 61 min |
| Aug 7, 4:28 PM MDT | Severe Thunderstorm Warning | BIS | Divide, Williams | 57 min |
| Aug 7, 5:25 PM MDT | Severe Thunderstorm Warning | BIS | Divide, Williams | 35 min |
| Aug 7, 5:28 PM MDT | Severe Thunderstorm Warning | BIS | Morton | 62 min |
| Aug 7, 6:19 PM MDT | Severe Thunderstorm Warning | BIS | Mountrail | 56 min |
| Aug 7, 6:37 PM MDT | Severe Thunderstorm Warning | ABR | Campbell, Corson, Walworth | 38 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
Bismarck Municip, ND (KBIS), launched 12:00Z, 7.0 hours before the alert went out and 153 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
- 13 J/kg
- Mixed-layer CIN
- -483 J/kg
- Mixed-layer LCL
- 1580 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- -51 m²/s²
- 0-3 km storm-relative helicity
- -24 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 12:17 PM MDT | Mesoscale Discussion | SPC | Adams, Billings, Bowman, Burke, Divide, Dunn and 15 more | 88 min |
| Aug 7, 2:51 PM MDT | Mesoscale Discussion | SPC | Adams, Burke, Dunn, Hettinger, Mercer, Mountrail and 2 more | 54 min |
| Aug 7, 5:24 PM MDT | Mesoscale Discussion | SPC | Burleigh, Emmons, Grant, Morton, Oliver, Sioux | 66 min |
| Aug 7, 3:45 PM MDT | Severe Thunderstorm Watch | SPC | Bennett, Custer, Haakon, Jackson, Jones, Meade and 5 more | 4 hr |
Nearby
Severe Thunderstorm Watches in North Dakota, 2004Severe Thunderstorm Watches in South Dakota, 2004Every severe thunderstorm watch 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.