Alert archive / Montana / Severe Thunderstorm Warnings in 2022

Severe Thunderstorm Warning 21, NWS Great Falls, MT

June 18, 2022Blaine County, Fergus County, Montana

NWS Great Falls, MT issued this severe thunderstorm warning at Jun 18, 2022, 7:32 PM MDT for Blaine County, Fergus County, Montana. It was in force for 28 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, 7:32 PM MDT (01:32 UTC)
Expired: Jun 18, 2022, 8:00 PM MDT
In force: 28 min
Issued by: NWS Great Falls, MT
Area: Storm-based polygon
Damage threat: Considerable
Hail: 2.0 in
Wind: 60.0 mph

Counties Blaine County, MT, Fergus County, MT

The radar

The Great Falls radar (KTFX), 177 km from the middle of the area, began a volume at 01:32 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, 1.5 hours before the alert went out and 121 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 341 J/kg
Mixed-layer CIN: -196 J/kg
Mixed-layer LCL: 1256 m above ground
0-6 km bulk shear: 75 kt
0-1 km storm-relative helicity: 153 m²/s²
0-3 km storm-relative helicity: 473 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

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, 5:45 PM MDT, 1 hour 47 minutes earlier.

Area forecast discussion, Jun 18, 5:45 PM MDT, 1 hour 47 minutes before

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In the hours before

Local storm report, Jun 18, 4:20 PM MDT, 3 hours 12 minutes before

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Special weather statement, Jun 18, 4:28 PM MDT, 3 hours 4 minutes before

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Local storm report, Jun 18, 4:39 PM MDT, 2 hours 53 minutes before

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Special weather statement, Jun 18, 4:42 PM MDT, 2 hours 50 minutes before

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Special weather statement, Jun 18, 4:59 PM MDT, 2 hours 33 minutes before

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Special weather statement, Jun 18, 5:18 PM MDT, 2 hours 14 minutes before

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The office that day

Everything else NWS Great Falls, MT issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 18, 6:13 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Blaine, Hill	17 min
Jun 18, 6:29 PM MDT	Special Weather Statement	TFX	Pondera	46 min
Jun 18, 6:33 PM MDT	Special Weather Statement	TFX	Fergus	27 min
Jun 18, 6:43 PM MDT	Special Weather Statement	TFX		32 min
Jun 18, 7:38 PM MDT	Special Weather Statement	TFX	Fergus	22 min
Jun 18, 7:51 PM MDT	Special Weather Statement	TFX	Blaine	24 min
Jun 18, 7:58 PM MDT	Severe Thunderstorm Warning	TFX	Blaine	32 min
Jun 18, 8:03 PM MDT	Special Weather Statement	TFX	Chouteau	27 min
Jun 18, 8:20 PM MDT	Special Weather Statement	TFX	Blaine	25 min
Jun 18, 8:35 PM MDT	Special Weather Statement	TFX	Fergus	25 min
Jun 18, 8:40 PM MDT	Special Weather Statement	TFX	Blaine	35 min
Jun 18, 8:48 PM MDT	Special Weather Statement	TFX	Fergus	27 min
Jun 18, 9:15 PM MDT	Special Weather Statement	TFX	Fergus	45 min
Jun 18, 9:19 PM MDT	Special Weather Statement	TFX		26 min
Jun 19, 12:31 AM MDT	Special Weather Statement	TFX	Fergus	29 min
Jun 19, 2:30 AM MDT	River Flood Watch	TFX		6 hr
Jun 19, 7:46 AM MDT	Special Weather Statement	TFX	Teton	44 min
Jun 19, 8:00 AM MDT	River Flood Advisory	TFX	Gallatin	43 hr
Jun 19, 2:37 PM MDT	Special Weather Statement	TFX	Beaverhead	38 min

Nearby

Severe Thunderstorm Warnings in Montana, 2022 Every 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.