Alert archive / Montana / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 77, NWS Billings, MT
NWS Billings, MT issued this severe thunderstorm warning at Jul 15, 2002, 10:14 PM MDT for Big Horn 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 15, 2002, 10:14 PM MDT (04:14 UTC)
- Expired
- Jul 15, 2002, 11:15 PM MDT
- In force
- 61 min
- Issued by
- NWS Billings, MT
- Area
- Whole counties
County Big Horn County, MT
The radar
The Billings radar (KBLX), 99 km from the middle of the area, began a volume at 04:13 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.
The nearest sounding before it
Great_falls, MT (KTFX), launched 00:00Z, 4.2 hours before the alert went out and 329 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
- 2262 J/kg
- Mixed-layer CIN
- -6 J/kg
- Mixed-layer LCL
- 2251 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 85 m²/s²
- 0-3 km storm-relative helicity
- 138 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.1
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 Jul 15, 8:33 PM MDT, 1 hour 41 minutes earlier.
Area forecast discussion, Jul 15, 8:33 PM MDT, 1 hour 41 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 16, 4:27 PM MDT | Severe Thunderstorm Warning | BYZ | Yellowstone | 48 min |
| Jul 16, 5:06 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 54 min |
| Jul 16, 5:29 PM MDT | Severe Thunderstorm Warning | BYZ | Big Horn | 61 min |
| Jul 16, 5:36 PM MDT | Severe Thunderstorm Warning | BYZ | Yellowstone | 54 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.