Alert archive / Montana / Tornado Watches in 2010
Tornado Watch 224
The Storm Prediction Center issued this tornado watch at May 26, 2010, 5:03 PM MDT for 9 counties in Montana; 7 counties in South Dakota; 4 counties in Wyoming. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- May 26, 2010, 5:03 PM MDT (23:03 UTC)
- Expired
- May 27, 2010, 12:00 AM MDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
Counties Big Horn County, MT, Carter County, MT, Custer County, MT, Fallon County, MT, Musselshell County, MT, Powder River County, MT, Rosebud County, MT, Treasure County, MT, Yellowstone County, MT, Butte County, SD, Custer County, SD, Fall River County, SD, Harding County, SD, Lawrence County, SD, Meade County, SD, Pennington County, SD, Campbell County, WY, Crook County, WY, Sheridan County, WY, Weston County, WY
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 40%
- One or more EF2 to EF5 tornadoes
- 20%
- 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
- 30%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
13 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 26, 5:06 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Rosebud | 51 min |
| May 26, 6:04 PM MDT | Severe Thunderstorm Warning | UNR | Campbell, Crook, Weston | 56 min |
| May 26, 6:10 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River, Rosebud | 65 min |
| May 26, 6:57 PM MDT | Severe Thunderstorm Warning | UNR | Campbell | 63 min |
| May 26, 7:19 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River, Rosebud | 56 min |
| May 26, 7:34 PM MDT | Flash Flood Warning | BYZ | Custer, Powder River, Rosebud | 2 hr |
| May 26, 7:56 PM MDT | Tornado Warning | BYZ | Custer, Powder River | 19 min |
| May 26, 8:19 PM MDT | Severe Thunderstorm Warning | UNR | Campbell | 56 min |
| May 26, 8:30 PM MDT | Tornado Warning | UNR | Crook | 30 min |
| May 26, 8:57 PM MDT | Tornado Warning | BYZ | Carter | 48 min |
| May 26, 8:59 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 16 min |
| May 26, 10:25 PM MDT | Severe Thunderstorm Warning | UNR | Crook | 35 min |
| May 26, 10:48 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 57 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 26, 3:41 PM MDT | Mesoscale Discussion | SPC | Big Horn, Carter, Custer, Powder River, Rosebud, Treasure and 1 more | 94 min |
| May 26, 1:26 PM MDT | Mesoscale Discussion | SPC | Goshen, Laramie, Platte | 64 min |
| May 26, 1:49 PM MDT | Tornado Watch | SPC | Albany, Campbell, Converse, Crook, Goshen, Johnson and 5 more | 7 hr |
Nearby
Tornado Watches in Montana, 2010Tornado Watches in South Dakota, 2010Tornado Watches in Wyoming, 2010Every tornado watch in 2010
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.