Alert archive / Montana / Special Weather Statements in 2011

Special Weather Statement, NWS Great Falls, MT

July 12, 2011Hill County, Montana

NWS Great Falls, MT issued this special weather statement at Jul 12, 2011, 7:39 PM MDT for Hill County, Montana. It was in force for 51 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 12, 2011, 7:39 PM MDT (01:39 UTC)
Expired: Jul 12, 2011, 8:30 PM MDT
In force: 51 min
Issued by: NWS Great Falls, MT

County Hill County, MT

The radar

The Great Falls radar (KTFX), 150 km from the middle of the area, began a volume at 01:43 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

Spokane, WA (KOTX), launched 00:00Z, 1.7 hours before the alert went out and 462 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: 2329 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 26 m²/s²
0-3 km storm-relative helicity: 167 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Jul 12, 5:22 PM MDT, 2 hours 17 minutes earlier.

Area forecast discussion, Jul 12, 5:22 PM MDT, 2 hours 17 minutes before

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Hazardous weather outlook, Jul 12, 3:53 PM MDT, 3 hours 46 minutes before

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In the hours before

Local storm report, Jul 12, 6:54 PM MDT, 45 minutes before

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Local storm report, Jul 12, 6:56 PM MDT, 43 minutes before

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Special weather statement, Jul 12, 7:15 PM MDT, 24 minutes before

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Local storm report, Jul 12, 7:18 PM MDT, 21 minutes before

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Local storm report, Jul 12, 7:37 PM MDT, 2 minutes before

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Special weather statement, Jul 12, 7:39 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 12, 6:48 PM MDT	Special Weather Statement	TFX	Blaine	57 min
Jul 12, 7:15 PM MDT	Special Weather Statement	TFX	Hill	45 min
Jul 12, 8:23 PM MDT	Special Weather Statement	TFX	Beaverhead	37 min
Jul 13, 12:26 AM MDT	Special Weather Statement	TFX	Fergus	49 min
Jul 13, 1:06 PM MDT	Special Weather Statement	TFX	Teton	39 min
Jul 13, 1:28 PM MDT	Severe Thunderstorm Warning	TFX	Lewis and Clark, Teton	62 min
Jul 13, 1:33 PM MDT	Flash Flood Watch	TFX		10 hr
Jul 13, 1:38 PM MDT	Severe Thunderstorm Warning	TFX	Lewis and Clark	35 min
Jul 13, 2:18 PM MDT	Special Weather Statement	TFX	Glacier	42 min
Jul 13, 2:25 PM MDT	Special Weather Statement	TFX	Teton	50 min
Jul 13, 2:27 PM MDT	Special Weather Statement	TFX	Lewis and Clark	48 min
Jul 13, 2:32 PM MDT	Severe Thunderstorm Warning	TFX	Lewis and Clark	18 min
Jul 13, 2:40 PM MDT	Special Weather Statement	TFX	Cascade	50 min
Jul 13, 2:42 PM MDT	Special Weather Statement	TFX		48 min
Jul 13, 2:51 PM MDT	Special Weather Statement	TFX	Glacier	39 min
Jul 13, 3:02 PM MDT	Severe Thunderstorm Warning	TFX	Glacier	43 min
Jul 13, 3:32 PM MDT	Special Weather Statement	TFX	Judith Basin	43 min
Jul 13, 3:32 PM MDT	Severe Thunderstorm Warning	TFX	Lewis and Clark	43 min
Jul 13, 3:47 PM MDT	Flash Flood Warning	TFX	Judith Basin	3 hr
Jul 13, 3:51 PM MDT	Special Weather Statement	TFX	Cascade	39 min
Jul 13, 3:56 PM MDT	Severe Thunderstorm Warning	TFX	Cascade	49 min
Jul 13, 4:06 PM MDT	Special Weather Statement	TFX	Toole	39 min
Jul 13, 4:08 PM MDT	Severe Thunderstorm Warning	TFX	Liberty, Toole	52 min
Jul 13, 4:11 PM MDT	Severe Thunderstorm Warning	TFX	Lewis and Clark	49 min
Jul 13, 4:36 PM MDT	Special Weather Statement	TFX	Judith Basin	39 min
Jul 13, 4:39 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Lewis and Clark, Meagher	66 min
Jul 13, 4:55 PM MDT	Special Weather Statement	TFX	Fergus	65 min
Jul 13, 5:00 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Chouteau, Judith Basin	45 min
Jul 13, 5:16 PM MDT	Severe Thunderstorm Warning	TFX	Fergus	44 min
Jul 13, 5:27 PM MDT	Areal Flood Advisory	TFX	Jefferson, Lewis and Clark	2 hr
Jul 13, 5:38 PM MDT	Severe Thunderstorm Warning	TFX	Cascade, Judith Basin, Meagher	52 min
Jul 13, 5:39 PM MDT	Special Weather Statement	TFX	Blaine	51 min

Nearby

Special Weather Statements in Montana, 2011 Every special weather statement in 2011

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.