Alert archive / Montana / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 45, NWS Billings, MT
NWS Billings, MT issued this severe thunderstorm warning at Jun 21, 2002, 10:27 PM MDT for Rosebud County, Montana. It was in force for 33 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jun 21, 2002, 10:27 PM MDT (04:27 UTC)
- Expired
- Jun 21, 2002, 11:00 PM MDT
- In force
- 33 min
- Issued by
- NWS Billings, MT
- Area
- Counties, with a storm outline in the text
County Rosebud County, MT
The radar
The Billings radar (KBLX), 151 km from the middle of the area, began a volume at 04:27 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 21, 10:30 PM MDT | Hail 0.75 | Birney, MT |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Glasgow Intl Airport, MT (KGGW), launched 00:00Z, 4.5 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
- 1320 J/kg
- Mixed-layer CIN
- -25 J/kg
- Mixed-layer LCL
- 1902 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- -3 m²/s²
- 0-3 km storm-relative helicity
- 116 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.1
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 21, 8:33 PM MDT, 1 hour 54 minutes earlier.
Area forecast discussion, Jun 21, 8:33 PM MDT, 1 hour 54 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 |
|---|---|---|---|---|
| Jun 21, 8:27 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 63 min |
| Jun 21, 9:33 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn, Rosebud | 57 min |
| Jun 21, 11:03 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River, Rosebud | 57 min |
| Jun 22, 4:54 PM MDT | Severe Thunderstorm Warning | BYZ | Carter | 66 min |
| Jun 22, 5:11 PM MDT | Severe Thunderstorm Warning | BYZ | Powder River | 64 min |
Nearby
Severe Thunderstorm Warnings in Montana, 2002Every severe thunderstorm warning in 2002
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.