Alert archive / Montana / Severe Thunderstorm Watches in 2003
Severe Thunderstorm Watch 681
The Storm Prediction Center issued this severe thunderstorm watch at Jul 8, 2003, 12:00 PM MDT for 13 counties in Montana. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 8, 2003, 12:00 PM MDT (18:00 UTC)
- Expired
- Jul 8, 2003, 6:00 PM MDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
Counties Big Horn County, MT, Blaine County, MT, Carbon County, MT, Fergus County, MT, Garfield County, MT, Golden Valley County, MT, Musselshell County, MT, Petroleum County, MT, Phillips County, MT, Stillwater County, MT, Treasure County, MT, Valley County, MT, Yellowstone County, MT
The radar
The Billings radar (KBLX), 81 km from the middle of the area, began a volume at 18:00 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 8, 12:27 PM MDT | Severe Thunderstorm Warning | TFX | Blaine, Fergus | 48 min |
| Jul 8, 2:49 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 56 min |
| Jul 8, 5:02 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 58 min |
| Jul 8, 5:19 PM MDT | Tornado Warning | GGW | Garfield | 56 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, 6.0 hours before the alert went out and 187 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
- 1972 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 4 m²/s²
- 0-3 km storm-relative helicity
- -85 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 8, 10:53 AM MDT | Mesoscale Discussion | SPC | Custer, Fergus, Garfield, Golden Valley, Judith Basin, McCone and 10 more | 2 hr |
| Jul 8, 1:36 PM MDT | Mesoscale Discussion | SPC | Carter, Custer, Fallon, Powder River | 84 min |
| Jul 8, 2:05 PM MDT | Tornado Watch | SPC | Carter, Custer, Fallon, Powder River | 7 hr |
| Jul 8, 2:33 PM MDT | Mesoscale Discussion | SPC | Big Horn, Blaine, Carbon, Fergus, Garfield, Golden Valley and 7 more | 57 min |
| Jul 8, 4:38 PM MDT | Mesoscale Discussion | SPC | Carter, Custer, Fallon, Powder River | 67 min |
| Jul 8, 5:46 PM MDT | Mesoscale Discussion | SPC | Blaine, Daniels, Dawson, Garfield, McCone, Petroleum and 9 more | 59 min |
Nearby
Severe Thunderstorm Watches in Montana, 2003Every severe thunderstorm watch in 2003
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.