Alert archive / Montana / Special Weather Statements in 2014

Special Weather Statement, NWS Missoula, MT

August 12, 2014

NWS Missoula, MT issued this special weather statement at Aug 12, 2014, 6:39 PM MDT. It was in force for 66 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 12, 2014, 6:39 PM MDT (00:39 UTC)
Expired: Aug 12, 2014, 7:45 PM MDT
In force: 66 min
Issued by: NWS Missoula, MT

The radar

The Missoula radar (KMSX), 68 km from the middle of the area, began a volume at 00:41 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 00:00Z, 0.7 hours before the alert went out and 177 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: 13 J/kg
Mixed-layer CIN: -70 J/kg
Mixed-layer LCL: 2677 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 12 m²/s²
0-3 km storm-relative helicity: 42 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 Missoula, MT wrote its last area forecast discussion before this special weather statement went out at Aug 12, 2:53 PM MDT, 3 hours 46 minutes earlier.

Area forecast discussion, Aug 12, 2:53 PM MDT, 3 hours 46 minutes before

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In the hours before

Special weather statement, Aug 12, 4:40 PM MDT, 1 hour 59 minutes before

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Special weather statement, Aug 12, 5:13 PM MDT, 1 hour 26 minutes before

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Local storm report, Aug 12, 5:40 PM MDT, 59 minutes before

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Local storm report, Aug 12, 6:14 PM MDT, 25 minutes before

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Local storm report, Aug 12, 6:18 PM MDT, 21 minutes before

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Special weather statement, Aug 12, 6:39 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 12, 6:51 PM MDT	Special Weather Statement	MSO	Ravalli	39 min
Aug 12, 7:31 PM MDT	Special Weather Statement	MSO	Sanders	44 min
Aug 12, 8:23 PM MDT	Special Weather Statement	MSO	Sanders	52 min
Aug 12, 8:55 PM MDT	Special Weather Statement	MSO	Deer Lodge, Silver Bow	65 min
Aug 12, 10:11 PM MDT	Areal Flood Advisory	MSO	Silver Bow	64 min
Aug 13, 12:03 PM MDT	Flash Flood Watch	MSO	Missoula	6 hr
Aug 13, 1:47 PM MDT	Special Weather Statement	MSO	Ravalli	43 min
Aug 13, 3:09 PM MDT	Special Weather Statement	MSO	Missoula	51 min
Aug 13, 3:56 PM MDT	Special Weather Statement	MSO	Missoula	64 min
Aug 13, 4:00 PM MDT	Special Weather Statement	MSO	Sanders	45 min
Aug 13, 4:40 PM MDT	Areal Flood Advisory	MSO	Granite	65 min
Aug 13, 4:45 PM MDT	Special Weather Statement	MSO	Flathead, Lake	90 min
Aug 12, 6:26 PM MDT	Flash Flood Warning	MSO	Lemhi	4 hr
Aug 13, 4:33 PM MDT	Flash Flood Warning	MSO	Lemhi	57 min

Nearby

Special Weather Statements in Montana, 2014 Every special weather statement in 2014

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.