Alert archive / Montana / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 42, NWS Glasgow, MT
NWS Glasgow, MT issued this severe thunderstorm warning at Aug 31, 2017, 7:01 PM MDT for Richland County, Roosevelt County, Sheridan County, Montana. It was in force for 59 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
- Aug 31, 2017, 7:01 PM MDT (01:01 UTC)
- Expired
- Aug 31, 2017, 8:00 PM MDT
- In force
- 59 min
- Issued by
- NWS Glasgow, MT
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Richland County, MT, Roosevelt County, MT, Sheridan County, MT
The radar
The Glasgow radar (KGGW), 143 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.
The nearest sounding before it
Glasgow Intl Airport, MT (KGGW), launched 00:00Z, 1.0 hours before the alert went out and 141 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
- 195 J/kg
- Mixed-layer CIN
- -201 J/kg
- Mixed-layer LCL
- 2647 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 50 m²/s²
- 0-3 km storm-relative helicity
- 79 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Aug 31, 5:46 PM MDT, 1 hour 15 minutes earlier.
Area forecast discussion, Aug 31, 5:46 PM MDT, 1 hour 15 minutes before
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</html>Hazardous weather outlook, Aug 31, 2:43 PM MDT, 4 hours 18 minutes before
Hazardous Weather Outlook National Weather Service Glasgow MT 243 PM MDT Thu Aug 31 2017 MTZ016>027-059>062-010800- Central and Southeast Phillips-Central and Southern Valley- Daniels-Sheridan-Western Roosevelt-Petroleum-Garfield-McCone- Richland-Dawson-Prairie-Wibaux-Northern Phillips- Southwest Phillips-Northern Valley-Eastern Roosevelt- 243 PM MDT Thu Aug 31 2017 This Hazardous Weather Outlook is for portions of northeast Montana. .DAY ONE...This Afternoon and Tonight A segmented Red Flag Warning remains in effect for Northeast Montana through this evening for dry thunderstorms, low relative humidity, and a gusty winds. .DAYS TWO THROUGH SEVEN...Friday through Wednesday No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to standard operating procedures.
In the hours before
Special weather statement, Aug 31, 3:45 PM MDT, 3 hours 16 minutes before
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</html>Special weather statement, Aug 31, 6:26 PM MDT, 35 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 |
|---|---|---|---|---|
| Aug 31, 6:26 PM MDT | Special Weather Statement | GGW | Sheridan | 49 min |
| Aug 31, 8:00 PM MDT | Special Weather Statement | GGW | Richland | 60 min |
| Sep 1, 3:09 PM MDT | Fire Weather Watch | GGW | Daniels, Dawson, Garfield, McCone, Petroleum, Phillips and 6 more | 24 hr |
Nearby
Severe Thunderstorm Warnings in Montana, 2017Every severe thunderstorm warning in 2017
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.