Alert archive / Montana / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 53, NWS Great Falls, MT

July 8, 2013Fergus County, Montana

NWS Great Falls, MT issued this severe thunderstorm warning at Jul 8, 2013, 3:35 PM MDT for Fergus County, Montana. It was in force for 25 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 8, 2013, 3:35 PM MDT (21:35 UTC)
Expired: Jul 8, 2013, 4:00 PM MDT
In force: 25 min
Issued by: NWS Great Falls, MT
Area: Storm-based polygon

County Fergus County, MT

The radar

The Billings radar (KBLX), 164 km from the middle of the area, began a volume at 21:37 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
Jul 8, 1:04 PM MDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Great_falls, MT (KTFX), launched 12:00Z, 9.6 hours before the alert went out and 106 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: 110 J/kg
Mixed-layer CIN: -288 J/kg
Mixed-layer LCL: 1205 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 78 m²/s²
0-3 km storm-relative helicity: 115 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 8, 3:06 PM MDT, 29 minutes earlier.

Area forecast discussion, Jul 8, 3:06 PM MDT, 29 minutes before

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Hazardous weather outlook, Jul 8, 3:09 PM MDT, 26 minutes before

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In the hours before

Local storm report, Jul 8, 2:47 PM MDT, 48 minutes before

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Local storm report, Jul 8, 2:51 PM MDT, 44 minutes before

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Local storm report, Jul 8, 2:55 PM MDT, 40 minutes before

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Local storm report, Jul 8, 2:57 PM MDT, 38 minutes before

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Local storm report, Jul 8, 3:06 PM MDT, 29 minutes before

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Special weather statement, Jul 8, 3:35 PM MDT, 0 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 7, 6:23 PM MDT	Special Weather Statement	TFX	Fergus	37 min
Jul 7, 7:39 PM MDT	Special Weather Statement	TFX	Judith Basin	51 min
Jul 7, 8:38 PM MDT	Special Weather Statement	TFX	Judith Basin	52 min
Jul 8, 2:01 AM MDT	Special Weather Statement	TFX	Cascade	44 min
Jul 8, 2:21 AM MDT	Special Weather Statement	TFX	Liberty	39 min
Jul 8, 2:31 AM MDT	Special Weather Statement	TFX	Cascade	44 min
Jul 8, 2:43 AM MDT	Severe Thunderstorm Warning	TFX	Cascade	47 min
Jul 8, 3:05 AM MDT	Special Weather Statement	TFX	Cascade	40 min
Jul 8, 3:09 AM MDT	Special Weather Statement	TFX	Liberty	51 min
Jul 8, 3:14 AM MDT	Special Weather Statement	TFX	Cascade	46 min
Jul 8, 7:35 AM MDT	Special Weather Statement	TFX	Hill	25 min
Jul 8, 8:00 AM MDT	Special Weather Statement	TFX	Hill	30 min
Jul 8, 8:23 AM MDT	Special Weather Statement	TFX	Lewis and Clark, Teton	22 min
Jul 8, 8:35 AM MDT	Special Weather Statement	TFX	Hill	40 min
Jul 8, 9:04 AM MDT	Special Weather Statement	TFX	Cascade, Teton	41 min
Jul 8, 9:07 AM MDT	Special Weather Statement	TFX	Toole	38 min
Jul 8, 10:18 AM MDT	Special Weather Statement	TFX	Chouteau	42 min
Jul 8, 12:48 PM MDT	Special Weather Statement	TFX	Broadwater	42 min
Jul 8, 1:28 PM MDT	Severe Thunderstorm Warning	TFX	Broadwater, Meagher	47 min
Jul 8, 1:49 PM MDT	Severe Thunderstorm Warning	TFX	Gallatin, Madison	41 min
Jul 8, 2:03 PM MDT	Severe Thunderstorm Warning	TFX	Fergus, Judith Basin	42 min
Jul 8, 2:14 PM MDT	Severe Thunderstorm Warning	TFX	Judith Basin, Meagher	46 min
Jul 8, 2:15 PM MDT	Special Weather Statement	TFX	Jefferson	30 min
Jul 8, 2:26 PM MDT	Severe Thunderstorm Warning	TFX	Fergus, Judith Basin	34 min
Jul 8, 2:40 PM MDT	Tornado Warning	TFX	Fergus	35 min
Jul 8, 2:43 PM MDT	Severe Thunderstorm Warning	TFX	Broadwater, Gallatin, Meagher	32 min
Jul 8, 3:03 PM MDT	Severe Thunderstorm Warning	TFX	Gallatin, Madison	42 min
Jul 8, 3:11 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	49 min
Jul 8, 3:35 PM MDT	Special Weather Statement	TFX	Glacier	40 min
Jul 8, 3:39 PM MDT	Special Weather Statement	TFX	Meagher	36 min
Jul 8, 3:58 PM MDT	Special Weather Statement	TFX		47 min
Jul 8, 4:33 PM MDT	Severe Thunderstorm Warning	TFX	Beaverhead, Gallatin, Madison	42 min
Jul 8, 4:52 PM MDT	Special Weather Statement	TFX	Pondera	38 min
Jul 8, 4:56 PM MDT	Severe Thunderstorm Warning	TFX	Pondera, Teton, Toole	49 min
Jul 8, 5:14 PM MDT	Special Weather Statement	TFX	Lewis and Clark	46 min
Jul 8, 5:40 PM MDT	Special Weather Statement	TFX	Liberty, Teton, Toole	50 min
Jul 8, 5:50 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Chouteau, Liberty, Pondera, Teton	40 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.