Alert archive / Montana / Severe Thunderstorm Watches in 2019
Severe Thunderstorm Watch 511
The Storm Prediction Center issued this severe thunderstorm watch at Jul 16, 2019, 1:28 PM MDT for 15 counties in Montana; 4 counties in Wyoming. It was in force for 8 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 16, 2019, 1:28 PM MDT (19:28 UTC)
- Expired
- Jul 16, 2019, 9:00 PM MDT
- In force
- 8 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2.5 in
- Strongest gust expected
- 60 kt
Counties Big Horn County, MT, Carbon County, MT, Carter County, MT, Custer County, MT, Fallon County, MT, Golden Valley County, MT, Musselshell County, MT, Park County, MT, Powder River County, MT, Rosebud County, MT, Stillwater County, MT, Sweet Grass County, MT, Treasure County, MT, Wheatland County, MT, Yellowstone County, MT, Big Horn County, WY, Johnson County, WY, Park County, WY, Sheridan County, WY
The radar
The Billings radar (KBLX), 80 km from the middle of the area, began a volume at 19:29 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
- 20%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 60%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 60%
- One or more hailstones of 2 inches or more
- 40%
- Six or more combined severe hail and wind reports
- 95%
Warnings issued inside it
8 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 16, 3:36 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 54 min |
| Jul 16, 4:30 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Rosebud | 60 min |
| Jul 16, 5:25 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 65 min |
| Jul 16, 5:28 PM MDT | Severe Thunderstorm Warning | RIW | Big Horn | 35 min |
| Jul 16, 6:26 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 34 min |
| Jul 16, 7:48 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 42 min |
| Jul 16, 8:26 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 22 min |
| Jul 16, 8:46 PM MDT | Severe Thunderstorm Warning | BYZ | Sheridan | 26 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 |
|---|---|---|---|---|
| Jul 16, 12:56 PM MDT | Mesoscale Discussion | SPC | Big Horn, Carbon, Carter, Custer, Fallon, Golden Valley and 10 more | 94 min |
| Jul 16, 1:26 PM MDT | Mesoscale Discussion | SPC | Carter | 94 min |
| Jul 16, 4:55 PM MDT | Mesoscale Discussion | SPC | Dawson, McCone, Richland, Roosevelt, Wibaux | 2 hr |
| Jul 16, 2:50 PM MDT | Severe Thunderstorm Watch | SPC | Campbell, Converse, Crook, Goshen, Niobrara, Platte and 1 more | 9 hr |
Nearby
Severe Thunderstorm Watches in Montana, 2019Severe Thunderstorm Watches in Wyoming, 2019Every severe thunderstorm watch in 2019
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.