Alert archive / Montana / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 119, NWS Great Falls, MT

September 5, 2013Hill County, Liberty County, Montana

NWS Great Falls, MT issued this severe thunderstorm warning at Sep 5, 2013, 7:15 PM MDT for Hill County, Liberty County, Montana. It was in force for 30 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: Sep 5, 2013, 7:15 PM MDT (01:15 UTC)
Expired: Sep 5, 2013, 7:45 PM MDT
In force: 30 min
Issued by: NWS Great Falls, MT
Area: Storm-based polygon

Counties Hill County, MT, Liberty County, MT

The radar

The Great Falls radar (KTFX), 140 km from the middle of the area, began a volume at 01:17 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, 1.3 hours before the alert went out and 126 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1752 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 65 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 Sep 5, 4:30 PM MDT, 2 hours 45 minutes earlier.

Area forecast discussion, Sep 5, 4:30 PM MDT, 2 hours 45 minutes before

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Hazardous weather outlook, Sep 5, 4:21 PM MDT, 2 hours 54 minutes before

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In the hours before

Special weather statement, Sep 5, 4:43 PM MDT, 2 hours 32 minutes before

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Special weather statement, Sep 5, 5:09 PM MDT, 2 hours 6 minutes before

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Local storm report, Sep 5, 5:11 PM MDT, 2 hours 4 minutes before

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Special weather statement, Sep 5, 5:31 PM MDT, 1 hour 44 minutes before

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Local storm report, Sep 5, 5:50 PM MDT, 1 hour 25 minutes before

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Special weather statement, Sep 5, 5:54 PM MDT, 1 hour 21 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
Sep 5, 6:03 PM MDT	Special Weather Statement	TFX	Liberty	42 min
Sep 5, 6:05 PM MDT	Special Weather Statement	TFX		40 min
Sep 5, 6:08 PM MDT	Severe Thunderstorm Warning	TFX	Beaverhead, Madison	52 min
Sep 5, 6:13 PM MDT	Severe Thunderstorm Warning	TFX	Beaverhead	47 min
Sep 5, 6:40 PM MDT	Special Weather Statement	TFX	Blaine	50 min
Sep 5, 6:41 PM MDT	Special Weather Statement	TFX	Hill	49 min
Sep 5, 7:18 PM MDT	Special Weather Statement	TFX	Jefferson	42 min
Sep 5, 7:37 PM MDT	Severe Thunderstorm Warning	TFX	Broadwater, Jefferson	38 min
Sep 5, 7:56 PM MDT	Special Weather Statement	TFX	Gallatin	64 min
Sep 5, 8:00 PM MDT	Special Weather Statement	TFX	Blaine	60 min
Sep 5, 8:17 PM MDT	Special Weather Statement	TFX	Broadwater	43 min
Sep 5, 8:37 PM MDT	Special Weather Statement	TFX	Beaverhead	53 min
Sep 5, 10:38 PM MDT	Special Weather Statement	TFX	Gallatin	52 min
Sep 5, 11:35 PM MDT	Special Weather Statement	TFX	Fergus	55 min
Sep 6, 12:09 AM MDT	Special Weather Statement	TFX	Broadwater, Meagher	51 min
Sep 6, 12:29 AM MDT	Special Weather Statement	TFX	Petroleum	46 min
Sep 6, 2:17 PM MDT	Special Weather Statement	TFX	Lewis and Clark	43 min
Sep 6, 2:27 PM MDT	Special Weather Statement	TFX	Judith Basin	48 min
Sep 6, 3:03 PM MDT	Special Weather Statement	TFX	Lewis and Clark	42 min
Sep 6, 3:10 PM MDT	Special Weather Statement	TFX	Glacier	50 min
Sep 6, 3:25 PM MDT	Special Weather Statement	TFX	Glacier	50 min
Sep 6, 3:26 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Lewis and Clark	49 min
Sep 6, 3:29 PM MDT	Special Weather Statement	TFX	Glacier	46 min
Sep 6, 3:40 PM MDT	Special Weather Statement	TFX	Teton	50 min
Sep 6, 3:41 PM MDT	Special Weather Statement	TFX	Judith Basin	49 min
Sep 6, 3:48 PM MDT	Special Weather Statement	TFX	Cascade	42 min
Sep 6, 3:55 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Lewis and Clark	50 min
Sep 6, 4:04 PM MDT	Special Weather Statement	TFX	Glacier	41 min
Sep 6, 4:09 PM MDT	Severe Thunderstorm Warning	TFX	Cascade	66 min
Sep 6, 4:15 PM MDT	Special Weather Statement	TFX	Glacier	45 min
Sep 6, 4:27 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	63 min
Sep 6, 4:34 PM MDT	Severe Thunderstorm Warning	TFX	Cascade	41 min
Sep 6, 4:35 PM MDT	Special Weather Statement	TFX		40 min
Sep 6, 4:37 PM MDT	Special Weather Statement	TFX	Teton	38 min
Sep 6, 5:05 PM MDT	Special Weather Statement	TFX	Glacier	40 min
Sep 6, 5:09 PM MDT	Special Weather Statement	TFX	Teton	51 min
Sep 6, 5:11 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Chouteau, Judith Basin	49 min
Sep 6, 5:20 PM MDT	Special Weather Statement	TFX	Lewis and Clark	40 min
Sep 6, 5:23 PM MDT	Special Weather Statement	TFX	Teton	52 min
Sep 6, 5:55 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau, Judith Basin	65 min

Nearby

Severe Thunderstorm Warnings in Montana, 2013 Every severe thunderstorm warning in 2013

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.