Alert archive / Montana / Severe Thunderstorm Watches in 2007
Severe Thunderstorm Watch 267
The Storm Prediction Center issued this severe thunderstorm watch at May 12, 2007, 2:11 PM MDT for 20 counties in Montana. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- May 12, 2007, 2:11 PM MDT (20:11 UTC)
- Expired
- May 12, 2007, 9:23 PM MDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
Counties Blaine County, MT, Broadwater County, MT, Cascade County, MT, Chouteau County, MT, Deer Lodge County, MT, Fergus County, MT, Gallatin County, MT, Golden Valley County, MT, Granite County, MT, Hill County, MT, Jefferson County, MT, Judith Basin County, MT, Lewis and Clark County, MT, Meagher County, MT, Park County, MT, Powell County, MT, Silver Bow County, MT, Sweet Grass County, MT, Teton County, MT, Wheatland County, MT
The radar
The Great Falls radar (KTFX), 87 km from the middle of the area, began a volume at 20:13 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.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 10%
- One or more EF2 to EF5 tornadoes
- 5%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 20%
- Six or more combined severe hail and wind reports
- 80%
Warnings issued inside it
1 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 12, 5:04 PM MDT | Severe Thunderstorm Warning | TFX | Judith Basin | 41 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 12, 1:19 PM MDT | Mesoscale Discussion | SPC | Blaine, Broadwater, Cascade, Chouteau, Fergus, Golden Valley and 10 more | 116 min |
| May 12, 5:07 PM MDT | Mesoscale Discussion | SPC | Blaine, Broadwater, Cascade, Chouteau, Fergus, Hill and 8 more | 83 min |
Nearby
Severe Thunderstorm Watches in Montana, 2007Every severe thunderstorm watch in 2007
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.