Alert archive / North Dakota / Severe Thunderstorm Watches in 2004
Severe Thunderstorm Watch 658
The Storm Prediction Center issued this severe thunderstorm watch at Jul 20, 2004, 2:55 PM MDT for 36 counties in North Dakota; 9 counties in South Dakota. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 20, 2004, 2:55 PM MDT (20:55 UTC)
- Expired
- Jul 20, 2004, 9:00 PM MDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 45 counties
Adams County, ND, Benson County, ND, Billings County, ND, Bottineau County, ND, Bowman County, ND, Burke County, ND, Burleigh County, ND, Cavalier County, ND, Dunn County, ND, Eddy County, ND, Emmons County, ND, Foster County, ND, Grant County, ND, Hettinger County, ND, Kidder County, ND, Logan County, ND, McHenry County, ND, McIntosh County, ND, McKenzie County, ND, McLean County, ND, Mercer County, ND, Morton County, ND, Mountrail County, ND, Oliver County, ND, Pierce County, ND, Ramsey County, ND, Renville County, ND, Rolette County, ND, Sheridan County, ND, Sioux County, ND, Slope County, ND, Stark County, ND, Stutsman County, ND, Towner County, ND, Ward County, ND, Wells County, ND, Campbell County, SD, Corson County, SD, Dewey County, SD, Harding County, SD, McPherson County, SD, Perkins County, SD, Potter County, SD, Walworth County, SD, Ziebach County, SD
The radar
The Bismarck radar (KBIS), 76 km from the middle of the area, began a volume at 20:55 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 |
|---|---|---|---|---|
| Jul 20, 4:09 PM MDT | Severe Thunderstorm Warning | BIS | Dunn | 51 min |
| Jul 20, 5:38 PM MDT | Severe Thunderstorm Warning | BIS | Mountrail | 52 min |
| Jul 20, 5:45 PM MDT | Severe Thunderstorm Warning | BIS | Wells | 60 min |
| Jul 20, 5:48 PM MDT | Severe Thunderstorm Warning | FGF | Benson | 42 min |
| Jul 20, 5:58 PM MDT | Severe Thunderstorm Warning | BIS | Kidder | 62 min |
| Jul 20, 6:07 PM MDT | Severe Thunderstorm Warning | BIS | Ward | 53 min |
| Jul 20, 6:36 PM MDT | Severe Thunderstorm Warning | FGF | Eddy | 39 min |
| Jul 20, 6:56 PM MDT | Severe Thunderstorm Warning | BIS | Stutsman | 64 min |
| Jul 20, 6:58 PM MDT | Severe Thunderstorm Warning | BIS | Ward | 62 min |
| Jul 20, 7:15 PM MDT | Severe Thunderstorm Warning | BIS | Logan, McIntosh | 60 min |
| Jul 20, 7:21 PM MDT | Tornado Warning | BIS | Logan, McIntosh | 24 min |
| Jul 20, 7:31 PM MDT | Severe Thunderstorm Warning | ABR | Dewey, Potter, Walworth | 44 min |
| Jul 20, 8:08 PM MDT | Severe Thunderstorm Warning | ABR | Campbell, McPherson | 67 min |
| Jul 20, 8:13 PM MDT | Severe Thunderstorm Warning | ABR | Walworth | 32 min |
| Jul 20, 8:18 PM MDT | Severe Thunderstorm Warning | BIS | McIntosh | 57 min |
| Jul 20, 8:44 PM MDT | Severe Thunderstorm Warning | ABR | Faulk, Potter | 46 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, 8.9 hours before the alert went out and 81 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
- 144 J/kg
- Mixed-layer CIN
- -216 J/kg
- Mixed-layer LCL
- 1089 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 96 m²/s²
- 0-3 km storm-relative helicity
- 145 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 2:28 PM MDT | Mesoscale Discussion | SPC | Adams, Billings, Bottineau, Bowman, Burke, Burleigh and 20 more | 2 hr |
| Jul 20, 1:16 PM MDT | Mesoscale Discussion | SPC | Aurora, Beadle, Bon Homme, Brule, Buffalo, Charles Mix and 19 more | 119 min |
| Jul 20, 1:40 PM MDT | Tornado Watch | SPC | Aurora, Beadle, Bon Homme, Brookings, Brule, Buffalo and 20 more | 6 hr |
| Jul 20, 5:30 PM MDT | Mesoscale Discussion | SPC | Aurora, Bon Homme, Brookings, Charles Mix, Clay, Davison and 14 more | 90 min |
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.