Alert archive / Montana / Special Weather Statements in 2012

Special Weather Statement, NWS Great Falls, MT

July 10, 2012Hill County, Liberty County, Toole County, Montana

NWS Great Falls, MT issued this special weather statement at Jul 10, 2012, 7:52 PM MDT for Hill County, Liberty County, Toole County, Montana. It was in force for 38 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 10, 2012, 7:52 PM MDT (01:52 UTC)
Expired: Jul 10, 2012, 8:30 PM MDT
In force: 38 min
Issued by: NWS Great Falls, MT

Counties Hill County, MT, Liberty County, MT, Toole County, MT

The radar

The Great Falls radar (KTFX), 140 km from the middle of the area, began a volume at 01:53 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, 1.9 hours before the alert went out and 328 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: 324 J/kg
Mixed-layer CIN: -145 J/kg
Mixed-layer LCL: 3125 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 65 m²/s²
0-3 km storm-relative helicity: 160 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

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 10, 6:35 PM MDT, 1 hour 17 minutes earlier.

Area forecast discussion, Jul 10, 6:35 PM MDT, 1 hour 17 minutes before

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Hazardous weather outlook, Jul 10, 4:48 AM MDT, 15 hours 4 minutes before

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In the hours before

Local storm report, Jul 10, 5:57 PM MDT, 1 hour 55 minutes before

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Local storm report, Jul 10, 6:03 PM MDT, 1 hour 49 minutes before

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Local storm report, Jul 10, 6:04 PM MDT, 1 hour 48 minutes before

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Local storm report, Jul 10, 6:08 PM MDT, 1 hour 44 minutes before

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Local storm report, Jul 10, 7:48 PM MDT, 4 minutes before

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Special weather statement, Jul 10, 7:52 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 11, 2:52 PM MDT	Special Weather Statement	TFX	Jefferson	23 min
Jul 11, 3:16 PM MDT	Special Weather Statement	TFX	Gallatin	44 min
Jul 11, 3:44 PM MDT	Special Weather Statement	TFX	Broadwater	46 min

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.