Alert archive / Montana / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 3, NWS Glasgow, MT
NWS Glasgow, MT issued this severe thunderstorm warning at Jun 23, 1998, 1:00 PM MDT for Petroleum County, Montana. It was in force for 55 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 23, 1998, 1:00 PM MDT (19:00 UTC)
- Expired
- Jun 23, 1998, 1:55 PM MDT
- In force
- 55 min
- Issued by
- NWS Glasgow, MT
- Area
- Whole counties
County Petroleum County, MT
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 23, 1:22 PM MDT | Hail 1 | Winnett, 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 12:00Z, 7.0 hours before the alert went out and 174 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
- 123 J/kg
- Mixed-layer CIN
- -238 J/kg
- Mixed-layer LCL
- 1544 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 77 m²/s²
- 0-3 km storm-relative helicity
- 87 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Glasgow, MT wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 23, 9:19 AM MDT, 3 hours 41 minutes earlier.
Area forecast discussion, Jun 23, 9:19 AM MDT, 3 hours 41 minutes before
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</html>The office that day
Everything else NWS Glasgow, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 23, 1:52 PM MDT | Severe Thunderstorm Warning | GGW | Valley | 63 min |
| Jun 23, 2:02 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 63 min |
| Jun 23, 3:06 PM MDT | Severe Thunderstorm Warning | GGW | Garfield | 64 min |
Nearby
Severe Thunderstorm Warnings in Montana, 1998Every severe thunderstorm warning in 1998
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.