Alert archive / Montana / Severe Thunderstorm Warnings in 2013
Severe Thunderstorm Warning 110, NWS Great Falls, MT
NWS Great Falls, MT issued this severe thunderstorm warning at Aug 12, 2013, 8:57 PM MDT for Chouteau County, Hill County, Liberty County, Montana. It was in force for 48 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 12, 2013, 8:57 PM MDT (02:57 UTC)
- Expired
- Aug 12, 2013, 9:45 PM MDT
- In force
- 48 min
- Issued by
- NWS Great Falls, MT
- Area
- Storm-based polygon
Counties Chouteau County, MT, Hill County, MT, Liberty County, MT
The radar
The Great Falls radar (KTFX), 119 km from the middle of the area, began a volume at 02:58 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, 3.0 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
- 390 J/kg
- Mixed-layer CIN
- -99 J/kg
- Mixed-layer LCL
- 2823 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 1 m²/s²
- 0-3 km storm-relative helicity
- 65 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The office that day
Everything else NWS Great Falls, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 6:10 PM MDT | Special Weather Statement | TFX | Cascade | 50 min |
| Aug 12, 6:18 PM MDT | Special Weather Statement | TFX | Fergus | 42 min |
| Aug 12, 6:48 PM MDT | Special Weather Statement | TFX | Hill | 42 min |
| Aug 12, 6:56 PM MDT | Severe Thunderstorm Warning | TFX | Hill | 49 min |
| Aug 12, 7:36 PM MDT | Special Weather Statement | TFX | Chouteau | 39 min |
| Aug 12, 7:45 PM MDT | Special Weather Statement | TFX | Hill | 45 min |
| Aug 12, 8:10 PM MDT | Severe Thunderstorm Warning | TFX | Hill | 50 min |
| Aug 12, 8:26 PM MDT | Severe Thunderstorm Warning | TFX | Hill | 49 min |
| Aug 12, 9:15 PM MDT | Special Weather Statement | TFX | Hill | 45 min |
| Aug 12, 9:24 PM MDT | Special Weather Statement | TFX | Hill | 51 min |
| Aug 12, 9:29 PM MDT | Special Weather Statement | TFX | Chouteau | 46 min |
| Aug 12, 9:48 PM MDT | Special Weather Statement | TFX | Blaine | 42 min |
| Aug 12, 10:51 PM MDT | Special Weather Statement | TFX | Liberty | 39 min |
| Aug 13, 5:09 PM MDT | Special Weather Statement | TFX | Judith Basin | 51 min |
| Aug 13, 5:50 PM MDT | Special Weather Statement | TFX | Pondera | 40 min |
| Aug 13, 5:59 PM MDT | Special Weather Statement | TFX | Judith Basin | 46 min |
Nearby
Severe Thunderstorm Warnings in Montana, 2013Every severe thunderstorm warning in 2013
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.