Alert archive / Montana / Special Weather Statements in 2021

Special Weather Statement, NWS Missoula, MT

August 5, 2021Deer Lodge County, Silver Bow County, Montana

NWS Missoula, MT issued this special weather statement at Aug 5, 2021, 4:12 PM MDT for Deer Lodge County, Silver Bow County, Montana. It was in force for 48 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: Aug 5, 2021, 4:12 PM MDT (22:12 UTC)
Expired: Aug 5, 2021, 5:00 PM MDT
In force: 48 min
Issued by: NWS Missoula, MT
Hail: 0.00 in
Wind: 50

Counties Deer Lodge County, MT, Silver Bow County, MT

The radar

The Missoula radar (KMSX), 141 km from the middle of the area, began a volume at 22:13 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 12:00Z, 10.2 hours before the alert went out and 215 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: 1584 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 23 m²/s²
0-3 km storm-relative helicity: 142 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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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 Missoula, MT wrote its last area forecast discussion before this special weather statement went out at Aug 5, 2:36 PM MDT, 1 hour 36 minutes earlier.

Area forecast discussion, Aug 5, 2:36 PM MDT, 1 hour 36 minutes before

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In the hours before

Special weather statement, Aug 5, 2:27 PM MDT, 1 hour 45 minutes before

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Special weather statement, Aug 5, 3:20 PM MDT, 52 minutes before

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Special weather statement, Aug 5, 4:12 PM MDT, 0 minutes before

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The office that day

Everything else NWS Missoula, MT issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 4, 6:21 PM MDT	Special Weather Statement	MSO	Flathead	24 min
Aug 4, 6:31 PM MDT	Special Weather Statement	MSO	Lake	14 min
Aug 4, 7:57 PM MDT	Special Weather Statement	MSO	Lake	18 min
Aug 4, 8:03 PM MDT	Severe Thunderstorm Warning	MSO	Lake	27 min
Aug 4, 8:26 PM MDT	Severe Thunderstorm Warning Considerable damage threat	MSO	Lake	34 min
Aug 5, 2:27 PM MDT	Special Weather Statement	MSO	Mineral, Ravalli	33 min
Aug 5, 3:20 PM MDT	Special Weather Statement	MSO	Granite, Ravalli	55 min
Aug 5, 4:19 PM MDT	Special Weather Statement	MSO	Ravalli	56 min
Aug 5, 5:03 PM MDT	Severe Thunderstorm Warning	MSO	Powell	42 min

Nearby

Special Weather Statements in Montana, 2021 Every special weather statement in 2021

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.