Alert archive / Montana / Flash Flood Warnings in 2013

Flash Flood Warning 37, NWS Billings, MT

August 12, 2013Carter County, Custer County, Powder River County, Montana

NWS Billings, MT issued this flash flood warning at Aug 12, 2013, 6:56 PM MDT for Carter County, Custer County, Powder River County, Montana. It was in force for 3 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, 6:56 PM MDT (00:56 UTC)
Expired: Aug 12, 2013, 9:45 PM MDT
In force: 3 hr
Issued by: NWS Billings, MT
Area: Storm-based polygon
Flood severity: None

Counties Carter County, MT, Custer County, MT, Powder River County, MT

The nearest sounding before it

Rapid City, SD (KRAP), launched 00:00Z, 0.9 hours before the alert went out and 262 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: 804 J/kg
Mixed-layer CIN: -159 J/kg
Mixed-layer LCL: 1592 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 20 m²/s²
0-3 km storm-relative helicity: 48 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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, 4 hours 3 minutes earlier.

Area forecast discussion, Aug 12, 2:53 PM MDT, 4 hours 3 minutes before

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Hazardous weather outlook, Aug 12, 3:10 PM MDT, 3 hours 46 minutes before

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In the hours before

Special weather statement, Aug 12, 1:29 PM MDT, 5 hours 27 minutes before

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

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Special weather statement, Aug 12, 5:34 PM MDT, 1 hour 22 minutes before

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Special weather statement, Aug 12, 5:37 PM MDT, 1 hour 19 minutes before

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        Please try again in a few minutes.
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Special weather statement, Aug 12, 6:06 PM MDT, 50 minutes before

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      <p id="message2">
        Please try again in a few minutes.
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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Special weather statement, Aug 12, 6:21 PM MDT, 35 minutes before

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      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
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      <p id="message2">
        Please try again in a few minutes.
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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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, 6:51 PM MDT	Flash Flood Warning	BYZ	Musselshell, Yellowstone	4 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.