Alert archive / Montana / Severe Thunderstorm Watches in 2001
Severe Thunderstorm Watch 630
The Storm Prediction Center issued this severe thunderstorm watch at Jul 26, 2001, 3:00 PM MDT for 9 counties in Montana. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 26, 2001, 3:00 PM MDT (21:00 UTC)
- Expired
- Jul 26, 2001, 9:00 PM MDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
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
The radar
The Billings radar (KBLX), 140 km from the middle of the area, began a volume at 21:03 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
14 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 26, 3:12 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell | 63 min |
| Jul 26, 3:27 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 93 min |
| Jul 26, 3:30 PM MDT | Severe Thunderstorm Warning | BYZ | Treasure | 60 min |
| Jul 26, 3:34 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 56 min |
| Jul 26, 3:37 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 53 min |
| Jul 26, 4:15 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 60 min |
| Jul 26, 5:15 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 60 min |
| Jul 26, 5:18 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 57 min |
| Jul 26, 5:52 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 58 min |
| Jul 26, 6:18 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 42 min |
| Jul 26, 6:51 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 69 min |
| Jul 26, 7:05 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River, Rosebud | 55 min |
| Jul 26, 7:45 PM MDT | Severe Thunderstorm Warning | BYZ | Carter, Fallon | 75 min |
| Jul 26, 9:00 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 60 min |
The nearest sounding before it
Glasgow Intl Airport, MT (KGGW), launched 12:00Z, 9.0 hours before the alert went out and 251 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
- 59 J/kg
- Mixed-layer CIN
- -213 J/kg
- Mixed-layer LCL
- 1424 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- -38 m²/s²
- 0-3 km storm-relative helicity
- 49 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.7
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 |
|---|---|---|---|---|
| Jul 25, 8:30 PM MDT | Severe Thunderstorm Watch | SPC | Carter, Powder River | 6 hr |
| Jul 26, 3:00 PM MDT | Severe Thunderstorm Watch | SPC | Dawson, Garfield, McCone, Prairie, Richland, Roosevelt and 2 more | 6 hr |
Nearby
Severe Thunderstorm Watches in Montana, 2001Every severe thunderstorm watch in 2001
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.