Alert archive / Montana / Severe Thunderstorm Watches in 2004
Severe Thunderstorm Watch 651
The Storm Prediction Center issued this severe thunderstorm watch at Jul 16, 2004, 5:40 PM MDT for 17 counties in Montana; 17 counties in North Dakota. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 16, 2004, 5:40 PM MDT (23:40 UTC)
- Expired
- Jul 16, 2004, 11:00 PM MDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 34 counties
Big Horn County, MT, Carbon County, MT, Custer County, MT, Dawson County, MT, Fallon County, MT, Fergus County, MT, Garfield County, MT, Golden Valley County, MT, McCone County, MT, Musselshell County, MT, Petroleum County, MT, Prairie County, MT, Richland County, MT, Rosebud County, MT, Treasure County, MT, Wibaux County, MT, Yellowstone County, MT, Adams County, ND, Billings County, ND, Bowman County, ND, Dunn County, ND, Golden Valley County, ND, Grant County, ND, Hettinger County, ND, McKenzie County, ND, McLean County, ND, Mercer County, ND, Morton County, ND, Mountrail County, ND, Oliver County, ND, Slope County, ND, Stark County, ND, Ward County, ND, Williams County, ND
The radar
The Glasgow radar (KGGW), 135 km from the middle of the area, began a volume at 23:43 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
4 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 16, 5:58 PM MDT | Severe Thunderstorm Warning | BYZ | Yellowstone | 62 min |
| Jul 16, 6:13 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 62 min |
| Jul 16, 6:55 PM MDT | Severe Thunderstorm Warning | GGW | Prairie | 65 min |
| Jul 16, 7:12 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 63 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
Great_falls, MT (KTFX), launched 12:00Z, 11.7 hours before the alert went out and 341 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
- 10 J/kg
- Mixed-layer CIN
- -444 J/kg
- Mixed-layer LCL
- 2307 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 127 m²/s²
- 0-3 km storm-relative helicity
- 123 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 |
|---|---|---|---|---|
| Jul 15, 8:16 PM MDT | Mesoscale Discussion | SPC | Barnes, Ransom, Richland, Sargent | 89 min |
| Jul 16, 4:29 PM MDT | Mesoscale Discussion | SPC | Adams, Burke, Burleigh, Divide, Dunn, Emmons and 13 more | 91 min |
Nearby
Severe Thunderstorm Watches in Montana, 2004Severe Thunderstorm Watches in North 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.