Alert archive / Montana / Special Weather Statements in 2012

Special Weather Statement, NWS Great Falls, MT

July 1, 2012Glacier County, Montana

NWS Great Falls, MT issued this special weather statement at Jul 1, 2012, 5:53 PM MDT for Glacier County, Montana. It was in force for 52 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, 5:53 PM MDT (23:53 UTC)
Expired: Jul 1, 2012, 6:45 PM MDT
In force: 52 min
Issued by: NWS Great Falls, MT

County Glacier County, MT

The radar

The Missoula radar (KMSX), 191 km from the middle of the area, began a volume at 23:56 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 12:00Z, 11.9 hours before the alert went out and 234 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: 82 J/kg
Mixed-layer CIN: -49 J/kg
Mixed-layer LCL: 661 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: -2 m²/s²
0-3 km storm-relative helicity: 33 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 1, 2:55 PM MDT, 2 hours 58 minutes earlier.

Area forecast discussion, Jul 1, 2:55 PM MDT, 2 hours 58 minutes before

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Hazardous weather outlook, Jul 1, 4:13 AM MDT, 13 hours 40 minutes before

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In the hours before

Special weather statement, Jul 1, 4:53 PM MDT, 1 hour before

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Special weather statement, Jul 1, 5:04 PM MDT, 49 minutes before

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Local storm report, Jul 1, 5:11 PM MDT, 42 minutes before

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Special weather statement, Jul 1, 5:42 PM MDT, 11 minutes before

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Special weather statement, Jul 1, 5:45 PM MDT, 8 minutes before

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Special weather statement, Jul 1, 5:53 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, 4:08 AM MDT	Red Flag Warning	TFX	Broadwater, Gallatin, Jefferson, Lewis and Clark, Meagher	17 hr
Jul 1, 3:43 PM MDT	Special Weather Statement	TFX	Ravalli	47 min
Jul 1, 4:17 PM MDT	Special Weather Statement	TFX	Beaverhead	43 min
Jul 1, 4:53 PM MDT	Special Weather Statement	TFX	Jefferson, Madison	67 min
Jul 1, 5:04 PM MDT	Special Weather Statement	TFX		56 min
Jul 1, 5:42 PM MDT	Special Weather Statement	TFX	Broadwater	48 min
Jul 1, 5:45 PM MDT	Special Weather Statement	TFX	Beaverhead	45 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.