Alert archive / Montana / Severe Thunderstorm Warnings in 2022
Severe Thunderstorm Warning 18, NWS Great Falls, MT
NWS Great Falls, MT issued this severe thunderstorm warning at Jun 18, 2022, 3:56 PM MDT for Chouteau County, Hill County, Liberty County, Montana. It was in force for 49 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
- Jun 18, 2022, 3:56 PM MDT (21:56 UTC)
- Expired
- Jun 18, 2022, 4:45 PM MDT
- In force
- 49 min
- Issued by
- NWS Great Falls, MT
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Hail
- 1.5 in
- Wind
- 70.0 mph
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 21:56 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 18, 12:37 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Great_falls, MT (KTFX), launched 12:00Z, 9.9 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
- 1 J/kg
- Mixed-layer CIN
- -651 J/kg
- Mixed-layer LCL
- 1196 m above ground
- 0-6 km bulk shear
- 51 kt
- 0-1 km storm-relative helicity
- 32 m²/s²
- 0-3 km storm-relative helicity
- 334 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 Great Falls, MT wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 18, 2:00 PM MDT, 1 hour 56 minutes earlier.
Area forecast discussion, Jun 18, 2:00 PM MDT, 1 hour 56 minutes before
Area Forecast Discussion National Weather Service Great Falls MT 200 PM MDT Sat Jun 18 2022 .SYNOPSIS... Showers and thunderstorms will move through North Central MT this evening, while a steady rain is forecast to develop on Sunday evening and then continue on Monday over much of Central MT. Afternoon temperatures will be cool on Monday, but expect near normal temperatures by mid week. && .DISCUSSION... Tonight through Monday night...With a strong upper level disturbance moving northeastward through Central MT this evening, expect thunderstorms, some severe, to accompany this disturbance. Thus a severe thunderstorm watch is in effect until early this evening over a good portion of North Central MT. Scattered showers/thunderstorms continue through Sunday, with the precipitation becoming more stratiform by Sunday evening. A widespread rainfall continues to be likely over much of Central MT from Sunday evening through Monday. The airmass will be cold enough that snow will be likely in the mountains of Southwest MT. At this time, most of the snow accumulations will be above 8000 feet, thus no winter highlights are planned for this area at this time. Afternoon temperatures will be well below normal on Monday. Tuesday through Saturday...Expect drier and warmer conditions to develop, as weak upper level ridging develops over Monday. The chances for precipitation will be decreasing on Tuesday as the drier/warmer air moves in. At this point, afternoon temperatures are forecast to be about 5 degrees above normal for a few days late this week, but it should not be as hot as this past Friday. Brusda && .AVIATION... 1055 AM MDT Sat Jun 18 2022 (18/18Z TAF period) VFR conditions are expected, however an area of showers/thunderstorms will affect much of North Central MT this afternoon/evening. Some storms will be severe, with the main threat being gusty winds and large hail. The storms diminish overnight, but scattered showers will continue through Sunday morning. Brusda Refer to weather.gov/zlc for more detailed regional aviation weather and hazard information. && .HYDROLOGY... The main concern with any thunderstorm tonight could produce isolated areas of heavy rainfall. For Sunday/Monday...the forecast models continue to prog over 1 inch of rainfall over much of Central MT. At this time, there is about a 60 percent chance of the rainfall being this heavy over the Plains, so some adjustments to the amounts/locations are likely over the next day. There is a small potential the Battle Creek and Gallatin River near Logan could go above flood stage by Tuesday, thus a flood highlight might be needed in the next day or two. Brusda && .PRELIMINARY POINT TEMPS/POPS... GTF 51 68 47 58 / 60 70 60 70 CTB 49 66 47 60 / 60 50 50 80 HLN 56 67 49 58 / 50 80 70 70 BZN 51 70 45 58 / 30 80 80 80 WYS 41 63 36 51 / 30 50 60 80 DLN 47 63 41 54 / 30 80 80 70 HVR 56 73 52 63 / 50 60 60 80 LWT 53 68 46 59 / 60 80 80 80 && .TFX WATCHES/WARNINGS/ADVISORIES... None. && http://www.weather.gov/greatfalls
In the hours before
Special weather statement, Jun 18, 3:18 PM MDT, 38 minutes before
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</html>Local storm report, Jun 18, 3:21 PM MDT, 35 minutes before
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</html>Local storm report, Jun 18, 3:22 PM MDT, 34 minutes before
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</html>Local storm report, Jun 18, 3:24 PM MDT, 32 minutes before
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</html>Local storm report, Jun 18, 3:41 PM MDT, 15 minutes before
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</html>Special weather statement, Jun 18, 3:44 PM MDT, 12 minutes before
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</html>The office that day
Everything else NWS Great Falls, MT issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 17, 6:18 PM MDT | Special Weather Statement | TFX | Glacier | 27 min |
| Jun 17, 6:34 PM MDT | Severe Thunderstorm Warning | TFX | Glacier, Pondera | 45 min |
| Jun 17, 7:02 PM MDT | Severe Thunderstorm Warning | TFX | Glacier, Pondera, Toole | 43 min |
| Jun 17, 7:46 PM MDT | Special Weather Statement | TFX | Toole | 29 min |
| Jun 17, 9:17 PM MDT | Special Weather Statement | TFX | Cascade | 28 min |
| Jun 18, 1:03 AM MDT | Special Weather Statement | TFX | Glacier | 27 min |
| Jun 18, 1:14 AM MDT | Severe Thunderstorm Warning | TFX | Glacier | 31 min |
| Jun 18, 4:17 AM MDT | Special Weather Statement | TFX | Glacier | 28 min |
| Jun 18, 4:41 AM MDT | Special Weather Statement | TFX | Glacier | 34 min |
| Jun 18, 12:57 PM MDT | Special Weather Statement | TFX | Teton | 33 min |
| Jun 18, 1:15 PM MDT | Special Weather Statement | TFX | Glacier | 30 min |
| Jun 18, 1:27 PM MDT | Severe Thunderstorm Warning | TFX | Lewis and Clark | 48 min |
| Jun 18, 1:28 PM MDT | Severe Thunderstorm Warning | TFX | Lewis and Clark | 47 min |
| Jun 18, 1:39 PM MDT | Severe Thunderstorm Warning | TFX | Lewis and Clark | 36 min |
| Jun 18, 1:54 PM MDT | Severe Thunderstorm Warning | TFX | Lewis and Clark, Teton | 8 min |
| Jun 18, 2:03 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Lewis and Clark, Teton | 42 min |
| Jun 18, 2:15 PM MDT | Special Weather Statement | TFX | Glacier | 30 min |
| Jun 18, 2:21 PM MDT | Special Weather Statement | TFX | Teton | 24 min |
| Jun 18, 2:24 PM MDT | Severe Thunderstorm Warning | TFX | Glacier | 36 min |
| Jun 18, 2:30 PM MDT | Special Weather Statement | TFX | Pondera | 30 min |
| Jun 18, 2:31 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Lewis and Clark, Teton | 44 min |
| Jun 18, 2:36 PM MDT | Severe Thunderstorm Warning | TFX | Pondera, Teton | 39 min |
| Jun 18, 2:59 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau, Teton | 46 min |
| Jun 18, 3:15 PM MDT | Special Weather Statement | TFX | Pondera | 30 min |
| Jun 18, 3:18 PM MDT | Special Weather Statement | TFX | Cascade | 42 min |
| Jun 18, 3:28 PM MDT | Severe Thunderstorm Warning | TFX | Cascade, Chouteau, Pondera, Teton | 47 min |
| Jun 18, 3:44 PM MDT | Special Weather Statement | TFX | Toole | 31 min |
| Jun 18, 4:01 PM MDT | Special Weather Statement | TFX | Toole | 59 min |
| Jun 18, 4:28 PM MDT | Special Weather Statement | TFX | Liberty | 32 min |
| Jun 18, 4:42 PM MDT | Special Weather Statement | TFX | Hill | 33 min |
| Jun 18, 4:59 PM MDT | Special Weather Statement | TFX | Hill, Liberty | 31 min |
| Jun 18, 5:18 PM MDT | Special Weather Statement | TFX | Hill | 27 min |
| Jun 18, 5:38 PM MDT | Severe Thunderstorm Warning | TFX | Blaine, Hill | 37 min |
Nearby
Severe Thunderstorm Warnings in Montana, 2022Every severe thunderstorm warning in 2022
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.