Alert archive / Montana / Severe Thunderstorm Watches in 2000
Severe Thunderstorm Watch 637
The Storm Prediction Center issued this severe thunderstorm watch at Aug 1, 2000, 7:00 PM MDT for 13 counties in Montana. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 1, 2000, 7:00 PM MDT (01:00 UTC)
- Expired
- Aug 2, 2000, 1:00 AM MDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
Counties Carter County, MT, Custer County, MT, Daniels County, MT, Dawson County, MT, Fallon County, MT, McCone County, MT, Powder River County, MT, Prairie County, MT, Richland County, MT, Roosevelt County, MT, Rosebud County, MT, Sheridan County, MT, Wibaux County, MT
The radar
The Glasgow radar (KGGW), 194 km from the middle of the area, began a volume at 01:03 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
3 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 1, 7:21 PM MDT | Severe Thunderstorm Warning | BYZ | Custer, Powder River, Rosebud | 54 min |
| Aug 1, 8:13 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River, Rosebud | 92 min |
| Aug 1, 8:52 PM MDT | Severe Thunderstorm Warning | GGW | McCone | 53 min |
The nearest sounding before it
Glasgow Intl Airport, MT (KGGW), launched 00:00Z, 1.0 hours before the alert went out and 194 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
- 858 J/kg
- Mixed-layer CIN
- -96 J/kg
- Mixed-layer LCL
- 2553 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 37 m²/s²
- 0-3 km storm-relative helicity
- 122 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.2
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 |
|---|---|---|---|---|
| Aug 2, 1:15 PM MDT | Severe Thunderstorm Watch | SPC | Carter | 6 hr |
| Aug 2, 2:00 PM MDT | Severe Thunderstorm Watch | SPC | Sheridan | 6 hr |
Nearby
Severe Thunderstorm Watches in Montana, 2000Every severe thunderstorm watch in 2000
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.