Alert archive / Montana / Severe Thunderstorm Watches in 2007
Severe Thunderstorm Watch 218
The Storm Prediction Center issued this severe thunderstorm watch at May 3, 2007, 1:40 PM MDT for 15 counties in Montana. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- May 3, 2007, 1:40 PM MDT (19:40 UTC)
- Expired
- May 3, 2007, 7:25 PM MDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
Counties Big Horn County, MT, Custer County, MT, Daniels County, MT, Garfield County, MT, McCone County, MT, Musselshell County, MT, Petroleum County, MT, Phillips County, MT, Powder River County, MT, Prairie County, MT, Roosevelt County, MT, Rosebud County, MT, Treasure County, MT, Valley County, MT, Yellowstone County, MT
The radar
The Glasgow radar (KGGW), 89 km from the middle of the area, began a volume at 19:42 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
- 5%
- One or more EF2 to EF5 tornadoes
- 5%
- Ten or more severe wind reports
- 40%
- 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
- 70%
Warnings issued inside it
9 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 3, 1:43 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell, Yellowstone | 32 min |
| May 3, 2:05 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 25 min |
| May 3, 2:17 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 28 min |
| May 3, 2:47 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 58 min |
| May 3, 3:31 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone | 59 min |
| May 3, 3:43 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, Valley | 62 min |
| May 3, 4:04 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone, Valley | 56 min |
| May 3, 4:55 PM MDT | Severe Thunderstorm Warning | GGW | Garfield, McCone, Valley | 65 min |
| May 3, 6:18 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Valley | 30 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 3, 1:35 PM MDT | Mesoscale Discussion | SPC | Big Horn, Custer, Garfield, McCone, Petroleum, Phillips and 5 more | 25 min |
| May 3, 5:59 PM MDT | Mesoscale Discussion | SPC | Custer, Daniels, Dawson, McCone, Powder River, Prairie and 4 more | 61 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.