Alert archive / Montana / Special Weather Statements in 2012

Special Weather Statement, NWS Great Falls, MT

July 1, 2012Judith Basin County, Montana

NWS Great Falls, MT issued this special weather statement at Jul 1, 2012, 7:23 PM MDT for Judith Basin County, Montana. It was in force for 37 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 1, 2012, 7:23 PM MDT (01:23 UTC)
Expired: Jul 1, 2012, 8:00 PM MDT
In force: 37 min
Issued by: NWS Great Falls, MT

County Judith Basin County, MT

The radar

The Great Falls radar (KTFX), 130 km from the middle of the area, began a volume at 01:26 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

Glasgow Intl Airport, MT (KGGW), launched 00:00Z, 1.4 hours before the alert went out and 308 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: 1259 J/kg
Mixed-layer CIN: -132 J/kg
Mixed-layer LCL: 2823 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 144 m²/s²
0-3 km storm-relative helicity: 207 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 8.9

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 1, 7:15 PM MDT, 8 minutes earlier.

Area forecast discussion, Jul 1, 7:15 PM MDT, 8 minutes before

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Hazardous weather outlook, Jul 1, 6:17 PM MDT, 1 hour 6 minutes before

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In the hours before

Local storm report, Jul 1, 5:58 PM MDT, 1 hour 25 minutes before

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Local storm report, Jul 1, 6:03 PM MDT, 1 hour 20 minutes before

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Special weather statement, Jul 1, 6:12 PM MDT, 1 hour 11 minutes before

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Special weather statement, Jul 1, 6:43 PM MDT, 40 minutes before

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Special weather statement, Jul 1, 6:47 PM MDT, 36 minutes before

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Special weather statement, Jul 1, 7:23 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 1, 6:12 PM MDT	Special Weather Statement	TFX	Broadwater	48 min
Jul 1, 6:43 PM MDT	Special Weather Statement	TFX	Glacier	62 min
Jul 1, 6:47 PM MDT	Special Weather Statement	TFX	Meagher	58 min
Jul 1, 8:25 PM MDT	Special Weather Statement	TFX	Blaine, Fergus	95 min
Jul 2, 3:46 AM MDT	Fire Weather Watch	TFX	Broadwater, Gallatin, Jefferson, Lewis and Clark, Meagher	11 hr
Jul 2, 3:54 AM MDT	High Wind Watch	TFX		24 hr
Jul 2, 1:48 PM MDT	High Wind Warning	TFX		40 hr
Jul 2, 2:19 PM MDT	Red Flag Warning	TFX	Broadwater, Gallatin, Jefferson, Lewis and Clark, Meagher	30 hr

Nearby

Special Weather Statements in Montana, 2012 Every special weather statement in 2012

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.