Alert archive / Montana / Snow Squall Warnings in 2020
Snow Squall Warning 5, NWS Great Falls, MT
NWS Great Falls, MT issued this snow squall warning at Feb 23, 2020, 6:23 PM MST for Lewis and Clark County, Montana. It was in force for 67 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
- Feb 23, 2020, 6:23 PM MST (01:23 UTC)
- Expired
- Feb 23, 2020, 7:30 PM MST
- In force
- 67 min
- Issued by
- NWS Great Falls, MT
- Area
- Storm-based polygon
County Lewis and Clark County, MT
The radar
The Great Falls radar (KTFX), 85 km from the middle of the area, began a volume at 01:23 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, 1.4 hours before the alert went out and 140 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
- 1 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1966 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 25 m²/s²
- 0-3 km storm-relative helicity
- 39 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 |
|---|---|---|---|---|
| Feb 23, 6:07 PM MST | Special Weather Statement | TFX | Beaverhead | 23 min |
| Feb 23, 6:35 PM MST | Special Weather Statement | TFX | Beaverhead | 25 min |
| Feb 23, 6:45 PM MST | Snow Squall Warning | TFX | Broadwater, Jefferson, Meagher | 30 min |
| Feb 23, 7:10 PM MST | Special Weather Statement | TFX | Beaverhead, Broadwater, Cascade, Jefferson, Meagher | 50 min |
| Feb 23, 7:17 PM MST | Special Weather Statement | TFX | Broadwater | 28 min |
| Feb 23, 7:47 PM MST | Special Weather Statement | TFX | Broadwater, Cascade, Gallatin, Judith Basin, Madison, Meagher | 43 min |
| Feb 23, 8:35 PM MST | Special Weather Statement | TFX | Fergus, Gallatin, Judith Basin, Madison, Meagher | 40 min |
| Feb 24, 4:28 PM MST | Special Weather Statement | TFX | Cascade | 62 min |
Nearby
Snow Squall Warnings in Montana, 2020Every snow squall warning in 2020
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.