Alert archive / Montana / Red Flag Warnings in 2013

Red Flag Warning 6, NWS Great Falls, MT

August 30, 20135 counties in Montana

NWS Great Falls, MT issued this red flag warning at Aug 30, 2013, 4:17 AM MDT for 5 counties in Montana. It took effect at Aug 30, 2013, 12:00 PM MDT. It was in force for 9 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 30, 2013, 4:17 AM MDT (10:17 UTC)
In effect from: Aug 30, 2013, 12:00 PM MDT
Expired: Aug 30, 2013, 9:00 PM MDT
In force: 9 hr
Issued by: NWS Great Falls, MT

Counties Broadwater County, MT, Gallatin County, MT, Jefferson County, MT, Lewis and Clark County, MT, Meagher County, MT

The radar

The Great Falls radar (KTFX), 125 km from the middle of the area, began a volume at 10:20 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

Great_falls, MT (KTFX), launched 00:00Z, 10.3 hours before the alert went out and 145 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: 15 J/kg
Mixed-layer CIN: -46 J/kg
Mixed-layer LCL: 3450 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: -16 m²/s²
0-3 km storm-relative helicity: 64 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 red flag 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 red flag warning went out at Aug 30, 4:03 AM MDT, 14 minutes earlier.

Area forecast discussion, Aug 30, 4:03 AM MDT, 14 minutes before

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Hazardous weather outlook, Aug 30, 4:08 AM MDT, 9 minutes before

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In the hours before

Local storm report, Aug 29, 11:11 PM MDT, 5 hours 6 minutes before

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Local storm report, Aug 29, 11:14 PM MDT, 5 hours 3 minutes before

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Local storm report, Aug 29, 11:19 PM MDT, 4 hours 58 minutes before

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Local storm report, Aug 29, 11:21 PM MDT, 4 hours 56 minutes before

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Local storm report, Aug 29, 11:46 PM MDT, 4 hours 31 minutes before

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Local storm report, Aug 29, 11:49 PM MDT, 4 hours 28 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
Aug 29, 7:33 PM MDT	Special Weather Statement	TFX	Glacier, Liberty, Pondera, Teton, Toole	42 min
Aug 29, 7:38 PM MDT	Special Weather Statement	TFX	Cascade	52 min
Aug 29, 8:27 PM MDT	Special Weather Statement	TFX	Chouteau, Hill	48 min
Aug 29, 8:29 PM MDT	Special Weather Statement	TFX	Broadwater, Jefferson	46 min
Aug 29, 9:14 PM MDT	Special Weather Statement	TFX	Broadwater, Meagher	46 min
Aug 29, 9:16 PM MDT	Special Weather Statement	TFX	Blaine, Hill	74 min
Aug 29, 9:32 PM MDT	Severe Thunderstorm Warning	TFX	Chouteau, Hill	43 min
Aug 29, 9:50 PM MDT	Severe Thunderstorm Warning	TFX	Blaine, Chouteau, Hill	55 min
Aug 29, 10:06 PM MDT	Special Weather Statement	TFX	Judith Basin, Meagher	39 min
Aug 29, 11:28 PM MDT	Severe Thunderstorm Warning	TFX	Blaine	47 min
Aug 30, 3:15 PM MDT	Special Weather Statement	TFX	Fergus	30 min

Nearby

Red Flag Warnings in Montana, 2013 Every red flag 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.