Alert archive / Montana / Severe Thunderstorm Warnings in 2022

Severe Thunderstorm Warning 7, NWS Great Falls, MT

June 18, 2022Glacier County, Montana

NWS Great Falls, MT issued this severe thunderstorm warning at Jun 18, 2022, 1:14 AM MDT for Glacier County, Montana. It was in force for 31 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, 1:14 AM MDT (07:14 UTC)
Expired: Jun 18, 2022, 1:45 AM MDT
In force: 31 min
Issued by: NWS Great Falls, MT
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

County Glacier County, MT

The radar

The Great Falls radar (KTFX), 183 km from the middle of the area, began a volume at 07:15 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, 7.2 hours before the alert went out and 225 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: 85 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 3956 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 53 m²/s²
0-3 km storm-relative helicity: 40 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 17, 11:50 PM MDT, 1 hour 24 minutes earlier.

Area forecast discussion, Jun 17, 11:50 PM MDT, 1 hour 24 minutes before

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In the hours before

Local storm report, Jun 17, 8:19 PM MDT, 4 hours 55 minutes before

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Local storm report, Jun 17, 8:22 PM MDT, 4 hours 52 minutes before

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Local storm report, Jun 17, 8:25 PM MDT, 4 hours 49 minutes before

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Local storm report, Jun 17, 8:52 PM MDT, 4 hours 22 minutes before

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Special weather statement, Jun 17, 9:17 PM MDT, 3 hours 57 minutes before

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Special weather statement, Jun 18, 1:03 AM MDT, 11 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 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, 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 Considerable damage threat	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 Considerable damage threat	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 Considerable damage threat	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 Considerable damage threat	TFX	Cascade, Chouteau, Pondera, Teton	47 min
Jun 18, 3:44 PM MDT	Special Weather Statement	TFX	Toole	31 min
Jun 18, 3:56 PM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Chouteau, Hill, Liberty	49 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, 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.