Alert archive / Montana / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 101, NWS Glasgow, MT
NWS Glasgow, MT issued this severe thunderstorm warning at Jul 21, 2018, 1:28 PM MDT for Daniels County, Montana. It was in force for 62 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 21, 2018, 1:28 PM MDT (19:28 UTC)
- Expired
- Jul 21, 2018, 2:30 PM MDT
- In force
- 62 min
- Issued by
- NWS Glasgow, MT
- Area
- Storm-based polygon
- Hail
- 1.75 in
- Wind
- 60.0 mph
County Daniels County, MT
The radar
The Glasgow radar (KGGW), 102 km from the middle of the area, began a volume at 19:30 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 12:00Z, 7.5 hours before the alert went out and 100 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
- 637 J/kg
- Mixed-layer CIN
- -421 J/kg
- Mixed-layer LCL
- 1463 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 294 m²/s²
- 0-3 km storm-relative helicity
- 287 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
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 Jul 20, 3:07 PM MDT, 22 hours 21 minutes earlier.
Area forecast discussion, Jul 20, 3:07 PM MDT, 22 hours 21 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 |
|---|---|---|---|---|
| Jul 20, 7:25 PM MDT | Special Weather Statement | GGW | Valley | 65 min |
| Jul 21, 11:43 AM MDT | Special Weather Statement | GGW | Valley | 47 min |
| Jul 21, 12:04 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Valley | 56 min |
| Jul 21, 12:54 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Valley | 66 min |
| Jul 21, 1:19 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Roosevelt, Sheridan | 56 min |
| Jul 21, 2:17 PM MDT | Severe Thunderstorm Warning | GGW | Daniels, Roosevelt, Sheridan | 58 min |
| Jul 21, 3:00 PM MDT | Lake Wind Advisory | GGW | Garfield, McCone, Petroleum, Phillips, Valley | 29 hr |
| Jul 21, 3:11 PM MDT | Severe Thunderstorm Warning | GGW | Roosevelt, Sheridan | 79 min |
| Jul 21, 4:20 PM MDT | Severe Thunderstorm Warning | GGW | Richland, Roosevelt | 40 min |
| Jul 21, 4:53 PM MDT | Severe Thunderstorm Warning | GGW | Richland, Roosevelt | 67 min |
Nearby
Severe Thunderstorm Warnings in Montana, 2018Every severe thunderstorm warning in 2018
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.