Alert archive / Montana / Severe Thunderstorm Watches in 1997
Severe Thunderstorm Watch 475
The Storm Prediction Center issued this severe thunderstorm watch at Jun 18, 1997, 4:45 PM MDT for 11 counties in Montana; Big Horn County, Park County, Sheridan County, Wyoming. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 18, 1997, 4:45 PM MDT (22:45 UTC)
- Expired
- Jun 18, 1997, 10:00 PM MDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
Counties Big Horn County, MT, Carbon County, MT, Carter County, MT, Custer County, MT, Fallon County, MT, Powder River County, MT, Prairie County, MT, Rosebud County, MT, Treasure County, MT, Wibaux County, MT, Yellowstone County, MT, Big Horn County, WY, Park County, WY, Sheridan County, WY
The radar
The Billings radar (KBLX), 92 km from the middle of the area, began a volume at 22:47 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.
Warnings issued inside it
11 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 18, 4:59 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 61 min |
| Jun 18, 5:02 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 63 min |
| Jun 18, 5:39 PM MDT | Severe Thunderstorm Warning | BYZ | Carbon | 61 min |
| Jun 18, 5:40 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 65 min |
| Jun 18, 5:43 PM MDT | Severe Thunderstorm Warning | GGW | Prairie | 62 min |
| Jun 18, 6:01 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Rosebud | 59 min |
| Jun 18, 6:16 PM MDT | Severe Thunderstorm Warning | BYZ | Fallon | 64 min |
| Jun 18, 7:05 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Powder River, Rosebud | 60 min |
| Jun 18, 7:21 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 59 min |
| Jun 18, 8:51 PM MDT | Severe Thunderstorm Warning | BYZ | Yellowstone | 64 min |
| Jun 18, 9:34 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 61 min |
The nearest sounding before it
Riverton, WY (KRIW), launched 12:00Z, 10.8 hours before the alert went out and 256 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1885 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- -83 m²/s²
- 0-3 km storm-relative helicity
- 51 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 18, 3:15 PM MDT | Tornado Watch | SPC | Goshen, Laramie | 6 hr |
Nearby
Severe Thunderstorm Watches in Montana, 1997Severe Thunderstorm Watches in Wyoming, 1997Every severe thunderstorm watch in 1997
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.