Alert archive / Montana / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 18, NWS Billings, MT
NWS Billings, MT issued this severe thunderstorm warning at Jul 10, 2017, 5:41 PM MDT for Custer County, Montana. It was in force for 49 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jul 10, 2017, 5:41 PM MDT (23:41 UTC)
- Expired
- Jul 10, 2017, 6:30 PM MDT
- In force
- 49 min
- Issued by
- NWS Billings, MT
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 70.0 mph
County Custer County, MT
The radar
The Glasgow radar (KGGW), 231 km from the middle of the area, began a volume at 23:45 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.
The nearest sounding before it
Glasgow Intl Airport, MT (KGGW), launched 12:00Z, 11.7 hours before the alert went out and 232 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
- 82 J/kg
- Mixed-layer CIN
- -473 J/kg
- Mixed-layer LCL
- 2631 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 149 m²/s²
- 0-3 km storm-relative helicity
- 164 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The office that day
Everything else NWS Billings, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 10, 3:30 AM MDT | Red Flag Warning | BYZ | Big Horn, Golden Valley, Musselshell, Powder River, Rosebud, Treasure and 1 more | 17 hr |
| Jul 10, 12:46 PM MDT | Special Weather Statement | BYZ | Park | 44 min |
| Jul 10, 1:24 PM MDT | Special Weather Statement | BYZ | Wheatland | 51 min |
| Jul 10, 1:36 PM MDT | Special Weather Statement | BYZ | Park, Sweet Grass | 39 min |
| Jul 10, 2:11 PM MDT | Special Weather Statement | BYZ | Golden Valley | 49 min |
| Jul 10, 2:19 PM MDT | Special Weather Statement | BYZ | Stillwater | 41 min |
| Jul 10, 2:25 PM MDT | Special Weather Statement | BYZ | Park | 50 min |
| Jul 10, 2:59 PM MDT | Special Weather Statement | BYZ | Musselshell | 46 min |
| Jul 10, 3:31 PM MDT | Special Weather Statement | BYZ | Yellowstone | 44 min |
| Jul 10, 3:43 PM MDT | Special Weather Statement | BYZ | Musselshell, Treasure | 47 min |
| Jul 10, 3:44 PM MDT | Special Weather Statement | BYZ | Carter | 46 min |
| Jul 10, 3:45 PM MDT | Special Weather Statement | BYZ | Carter | 45 min |
| Jul 10, 4:07 PM MDT | Special Weather Statement | BYZ | Sweet Grass | 38 min |
| Jul 10, 4:15 PM MDT | Special Weather Statement | BYZ | Big Horn, Yellowstone | 45 min |
| Jul 10, 4:31 PM MDT | Special Weather Statement | BYZ | Rosebud, Treasure | 44 min |
| Jul 10, 4:45 PM MDT | Special Weather Statement | BYZ | Fallon | 30 min |
| Jul 10, 4:52 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Rosebud | 23 min |
| Jul 10, 5:14 PM MDT | Special Weather Statement | BYZ | Custer | 46 min |
| Jul 10, 5:26 PM MDT | Special Weather Statement | BYZ | Fallon | 49 min |
Nearby
Severe Thunderstorm Warnings in Montana, 2017Every severe thunderstorm warning in 2017
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.