Alert archive / North Dakota / Tornado Watches in 1999
Tornado Watch 423
The Storm Prediction Center issued this tornado watch at Jun 8, 1999, 2:30 PM MDT for 4 counties in Montana; 24 counties in North Dakota; Harding County, Perkins County, South Dakota. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 8, 1999, 2:30 PM MDT (20:30 UTC)
- Expired
- Jun 8, 1999, 9:00 PM MDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
All 30 counties
Carter County, MT, Fallon County, MT, Powder River County, MT, Wibaux County, MT, Adams County, ND, Billings County, ND, Bottineau County, ND, Bowman County, ND, Burke 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, Pierce County, ND, Renville County, ND, Rolette County, ND, Sheridan County, ND, Slope County, ND, Stark County, ND, Towner County, ND, Ward County, ND, Harding County, SD, Perkins County, SD
The radar
The Bismarck radar (KBIS), 195 km from the middle of the area, began a volume at 20:31 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
10 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 8, 3:00 PM MDT | Severe Thunderstorm Warning | BIS | Mountrail | 60 min |
| Jun 8, 3:18 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 47 min |
| Jun 8, 3:45 PM MDT | Severe Thunderstorm Warning | BIS | McKenzie | 60 min |
| Jun 8, 4:05 PM MDT | Severe Thunderstorm Warning | BIS | Burke, Ward | 40 min |
| Jun 8, 4:08 PM MDT | Severe Thunderstorm Warning | UNR | Harding | 62 min |
| Jun 8, 4:52 PM MDT | Tornado Warning | BIS | McKenzie, Mountrail | 53 min |
| Jun 8, 5:07 PM MDT | Severe Thunderstorm Warning | UNR | Harding | 63 min |
| Jun 8, 5:50 PM MDT | Tornado Warning | BIS | Mountrail | 40 min |
| Jun 8, 6:00 PM MDT | Severe Thunderstorm Warning | UNR | Perkins | 65 min |
| Jun 8, 6:18 PM MDT | Tornado Warning | BIS | Renville, Ward | 42 min |
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 12:00Z, 8.5 hours before the alert went out and 199 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
- 1557 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 90 m²/s²
- 0-3 km storm-relative helicity
- 202 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 7, 11:15 PM MDT | Severe Thunderstorm Watch | SPC | Emmons, Logan, McIntosh, Sioux | 5 hr |
| Jun 7, 8:15 PM MDT | Severe Thunderstorm Watch | SPC | Beadle, Bon Homme, Brookings, Clark, Codington, Davison and 17 more | 6 hr |
Nearby
Tornado Watches in North Dakota, 1999Tornado Watches in Montana, 1999Tornado Watches in South Dakota, 1999Every tornado watch in 1999
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.