Alert archive / Montana / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 210, NWS Billings, MT
NWS Billings, MT issued this severe thunderstorm warning at Jul 21, 2001, 10:14 PM MDT for Rosebud County, Montana. It was in force for 61 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 21, 2001, 10:14 PM MDT (04:14 UTC)
- Expired
- Jul 21, 2001, 11:15 PM MDT
- In force
- 61 min
- Issued by
- NWS Billings, MT
- Area
- Whole counties
County Rosebud County, MT
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 21, 6:30 PM MDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Glasgow Intl Airport, MT (KGGW), launched 00:00Z, 4.2 hours before the alert went out and 221 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
- 649 J/kg
- Mixed-layer CIN
- -90 J/kg
- Mixed-layer LCL
- 2545 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 2 m²/s²
- 0-3 km storm-relative helicity
- 100 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.
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Billings, MT wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 21, 8:43 PM MDT, 1 hour 31 minutes earlier.
Area forecast discussion, Jul 21, 8:43 PM MDT, 1 hour 31 minutes before
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</html>The office that day
Everything else NWS Billings, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 6:31 PM MDT | Severe Thunderstorm Warning | BYZ | Wheatland | 59 min |
| Jul 21, 6:48 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 57 min |
| Jul 21, 7:31 PM MDT | Severe Thunderstorm Warning | BYZ | Wheatland | 59 min |
| Jul 21, 7:50 PM MDT | Severe Thunderstorm Warning | BYZ | Golden Valley | 25 min |
| Jul 21, 7:56 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 64 min |
| Jul 21, 8:18 PM MDT | Severe Thunderstorm Warning | BYZ | Musselshell | 57 min |
| Jul 21, 9:17 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 58 min |
| Jul 21, 10:32 PM MDT | Severe Thunderstorm Warning | BYZ | Yellowstone | 58 min |
| Jul 21, 11:06 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Rosebud | 54 min |
| Jul 21, 11:25 PM MDT | Flash Flood Warning | BYZ | Yellowstone | 2 hr |
| Jul 21, 11:32 PM MDT | Severe Thunderstorm Warning | BYZ | Yellowstone | 58 min |
| Jul 22, 12:07 AM MDT | Severe Thunderstorm Warning | BYZ | Yellowstone | 53 min |
| Jul 22, 12:26 AM MDT | Severe Thunderstorm Warning | BYZ | Custer | 59 min |
| Jul 22, 1:20 AM MDT | Severe Thunderstorm Warning | BYZ | Fallon | 55 min |
| Jul 22, 2:03 AM MDT | Severe Thunderstorm Warning | BYZ | Custer | 57 min |
| Jul 22, 2:56 AM MDT | Severe Thunderstorm Warning | BYZ | Custer | 64 min |
| Jul 22, 2:30 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 60 min |
| Jul 22, 3:20 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 55 min |
| Jul 22, 3:22 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Treasure | 53 min |
| Jul 22, 4:04 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 86 min |
| Jul 22, 4:11 PM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 64 min |
| Jul 22, 4:31 PM MDT | Severe Thunderstorm Warning | BYZ | Custer | 89 min |
| Jul 22, 5:29 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 91 min |
| Jul 22, 5:56 PM MDT | Severe Thunderstorm Warning | BYZ | Fallon | 64 min |
Nearby
Severe Thunderstorm Warnings in Montana, 2001Every severe thunderstorm warning 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.