Alert archive / Montana / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 80, NWS Billings, MT
NWS Billings, MT issued this severe thunderstorm warning at Jun 30, 1997, 11:21 PM MDT for Custer County, Powder River County, Montana. It was in force for 64 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
- Jun 30, 1997, 11:21 PM MDT (05:21 UTC)
- Expired
- Jul 1, 1997, 12:25 AM MDT
- In force
- 64 min
- Issued by
- NWS Billings, MT
- Area
- Whole counties
Counties Custer County, MT, Powder River County, MT
The nearest sounding before it
Rapid City, SD (KUNR), launched 00:00Z, 5.4 hours before the alert went out and 290 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
- 1716 J/kg
- Mixed-layer CIN
- -123 J/kg
- Mixed-layer LCL
- 1107 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 61 m²/s²
- 0-3 km storm-relative helicity
- 95 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 1.4
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 Jun 30, 2:00 PM MDT, 9 hours 21 minutes earlier.
Area forecast discussion, Jun 30, 2:00 PM MDT, 9 hours 21 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 1, 12:08 AM MDT | Severe Thunderstorm Warning | BYZ | Rosebud | 62 min |
| Jul 1, 12:17 AM MDT | Severe Thunderstorm Warning | BYZ | Custer, Powder River | 63 min |
| Jul 1, 1:22 AM MDT | Severe Thunderstorm Warning | BYZ | Custer | 63 min |
| Jul 1, 11:25 AM MDT | Severe Thunderstorm Warning | BYZ | Carter | 55 min |
Nearby
Severe Thunderstorm Warnings in Montana, 1997Every severe thunderstorm warning 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.