Alert archive / Montana / Severe Thunderstorm Warnings in 2022

Severe Thunderstorm Warning 134, NWS Great Falls, MT

July 18, 2022Glacier County, Pondera County, Toole County, Montana

NWS Great Falls, MT issued this severe thunderstorm warning at Jul 18, 2022, 11:31 AM MDT for Glacier County, Pondera County, Toole County, Montana. It was in force for 44 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: Jul 18, 2022, 11:31 AM MDT (17:31 UTC)
Expired: Jul 18, 2022, 12:15 PM MDT
In force: 44 min
Issued by: NWS Great Falls, MT
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Glacier County, MT, Pondera County, MT, Toole County, MT

The nearest sounding before it

Great_falls, MT (KTFX), launched 12:00Z, 5.5 hours before the alert went out and 174 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: 4 J/kg
Mixed-layer CIN: -404 J/kg
Mixed-layer LCL: 2137 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 122 m²/s²
0-3 km storm-relative helicity: 210 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 Jul 17, 5:45 PM MDT, 17 hours 46 minutes earlier.

Area forecast discussion, Jul 17, 5:45 PM MDT, 17 hours 46 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
Jul 17, 6:16 PM MDT	Special Weather Statement	TFX	Lewis and Clark	29 min
Jul 17, 6:22 PM MDT	Special Weather Statement	TFX	Fergus	23 min
Jul 17, 8:02 PM MDT	Special Weather Statement	TFX	Blaine	43 min
Jul 17, 10:27 PM MDT	Special Weather Statement	TFX	Madison	63 min
Jul 17, 10:31 PM MDT	Special Weather Statement	TFX	Beaverhead	59 min
Jul 17, 10:51 PM MDT	Special Weather Statement	TFX		24 min
Jul 17, 11:14 PM MDT	Special Weather Statement	TFX	Chouteau	61 min
Jul 17, 11:41 PM MDT	Special Weather Statement	TFX	Teton	64 min
Jul 18, 12:22 AM MDT	Special Weather Statement	TFX	Teton	23 min
Jul 18, 12:43 AM MDT	Special Weather Statement	TFX	Teton	32 min
Jul 18, 2:11 AM MDT	Special Weather Statement	TFX	Glacier	34 min
Jul 18, 2:16 AM MDT	Special Weather Statement	TFX	Hill	29 min
Jul 18, 2:25 AM MDT	Severe Thunderstorm Warning	TFX	Glacier	50 min
Jul 18, 3:05 AM MDT	Severe Thunderstorm Warning Considerable damage threat	TFX	Glacier, Toole	25 min
Jul 18, 3:25 AM MDT	Severe Thunderstorm Warning Destructive damage threat	TFX	Glacier, Hill, Liberty, Toole	50 min
Jul 18, 4:11 AM MDT	Severe Thunderstorm Warning	TFX	Hill, Liberty, Toole	49 min
Jul 18, 4:45 AM MDT	Special Weather Statement	TFX	Glacier	30 min
Jul 18, 5:14 AM MDT	Special Weather Statement	TFX	Glacier	31 min
Jul 18, 6:40 AM MDT	Special Weather Statement	TFX		35 min
Jul 18, 11:24 AM MDT	Special Weather Statement	TFX	Glacier	36 min
Jul 18, 12:07 PM MDT	Severe Thunderstorm Warning	TFX	Liberty, Pondera, Toole	38 min
Jul 18, 12:41 PM MDT	Severe Thunderstorm Warning	TFX	Glacier, Liberty, Pondera, Toole	49 min
Jul 18, 12:48 PM MDT	Special Weather Statement	TFX	Blaine	27 min
Jul 18, 12:55 PM MDT	Special Weather Statement	TFX	Fergus	20 min
Jul 18, 1:10 PM MDT	Special Weather Statement	TFX	Toole	35 min
Jul 18, 1:27 PM MDT	Special Weather Statement	TFX		33 min
Jul 18, 1:35 PM MDT	Special Weather Statement	TFX	Liberty, Toole	40 min
Jul 18, 1:36 PM MDT	Special Weather Statement	TFX	Blaine	24 min
Jul 18, 1:54 PM MDT	Special Weather Statement	TFX		36 min
Jul 18, 2:09 PM MDT	Special Weather Statement	TFX	Blaine	36 min
Jul 18, 2:27 PM MDT	Special Weather Statement	TFX	Hill	18 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.