Alert archive / Montana / Flash Flood Warnings in 2013

Flash Flood Warning 36, NWS Billings, MT

August 12, 2013Musselshell County, Yellowstone County, Montana

NWS Billings, MT issued this flash flood warning at Aug 12, 2013, 6:51 PM MDT for Musselshell County, Yellowstone County, Montana. It was in force for 4 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 12, 2013, 6:51 PM MDT (00:51 UTC)
Expired: Aug 12, 2013, 11:09 PM MDT
In force: 4 hr
Issued by: NWS Billings, MT
Area: Storm-based polygon
Flood severity: None

Counties Musselshell County, MT, Yellowstone County, MT

The radar

The Billings radar (KBLX), 45 km from the middle of the area, began a volume at 00:51 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, 0.9 hours before the alert went out and 221 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: 390 J/kg
Mixed-layer CIN: -99 J/kg
Mixed-layer LCL: 2823 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 1 m²/s²
0-3 km storm-relative helicity: 65 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 flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Billings, MT wrote its last area forecast discussion before this flash flood warning went out at Aug 12, 2:53 PM MDT, 3 hours 58 minutes earlier.

Area forecast discussion, Aug 12, 2:53 PM MDT, 3 hours 58 minutes before

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Hazardous weather outlook, Aug 12, 3:10 PM MDT, 3 hours 41 minutes before

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In the hours before

Special weather statement, Aug 12, 1:29 PM MDT, 5 hours 22 minutes before

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Special weather statement, Aug 12, 2:58 PM MDT, 3 hours 53 minutes before

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Special weather statement, Aug 12, 5:34 PM MDT, 1 hour 17 minutes before

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Special weather statement, Aug 12, 5:37 PM MDT, 1 hour 14 minutes before

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Special weather statement, Aug 12, 6:06 PM MDT, 45 minutes before

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Special weather statement, Aug 12, 6:21 PM MDT, 30 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 12, 6:06 PM MDT	Special Weather Statement	BYZ	Musselshell	54 min
Aug 12, 6:21 PM MDT	Special Weather Statement	BYZ	Carter	39 min
Aug 12, 6:56 PM MDT	Flash Flood Warning	BYZ	Carter, Custer, Powder River	3 hr
Aug 12, 7:09 PM MDT	Special Weather Statement	BYZ	Carter	51 min
Aug 12, 7:10 PM MDT	Special Weather Statement	BYZ	Musselshell, Yellowstone	65 min
Aug 12, 7:39 PM MDT	Special Weather Statement	BYZ	Wheatland	51 min
Aug 12, 7:59 PM MDT	Special Weather Statement	BYZ	Powder River	46 min
Aug 12, 8:07 PM MDT	Special Weather Statement	BYZ	Musselshell	38 min
Aug 12, 8:27 PM MDT	Special Weather Statement	BYZ	Yellowstone	48 min
Aug 12, 8:50 PM MDT	Special Weather Statement	BYZ	Treasure	55 min
Aug 12, 9:06 PM MDT	Special Weather Statement	BYZ	Golden Valley, Musselshell	39 min
Aug 12, 9:44 PM MDT	Special Weather Statement	BYZ	Rosebud, Treasure	46 min
Aug 12, 10:22 PM MDT	Special Weather Statement	BYZ	Yellowstone	38 min
Aug 12, 10:32 PM MDT	Special Weather Statement	BYZ	Rosebud	58 min
Aug 12, 11:11 PM MDT	Special Weather Statement	BYZ	Yellowstone	49 min
Aug 12, 11:49 PM MDT	Special Weather Statement	BYZ	Custer	71 min
Aug 13, 12:01 AM MDT	Special Weather Statement	BYZ	Treasure	44 min
Aug 13, 12:52 AM MDT	Flash Flood Warning	BYZ	Big Horn, Rosebud	3 hr
Aug 13, 1:58 AM MDT	Special Weather Statement	BYZ	Custer	47 min
Aug 13, 2:38 AM MDT	Special Weather Statement	BYZ	Powder River	67 min
Aug 13, 3:30 AM MDT	Special Weather Statement	BYZ	Carter	45 min
Aug 13, 12:20 PM MDT	Special Weather Statement	BYZ	Carter	55 min
Aug 13, 12:55 PM MDT	Flash Flood Warning	BYZ	Carter	3 hr
Aug 13, 3:53 PM MDT	Special Weather Statement	BYZ	Carbon	52 min
Aug 13, 5:09 PM MDT	Special Weather Statement	BYZ	Sweet Grass	66 min
Aug 13, 5:30 PM MDT	Special Weather Statement	BYZ	Carbon	60 min
Aug 13, 5:46 PM MDT	Flash Flood Warning	BYZ	Big Horn, Carbon	3 hr

Nearby

Flash Flood Warnings in Montana, 2013 Every flash flood 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.