Alert archive / Montana / Flash Flood Warnings in 2001

Flash Flood Warning 11, NWS Billings, MT

July 13, 2001Big Horn County, Montana

NWS Billings, MT issued this flash flood warning at Jul 13, 2001, 8:58 PM MDT for Big Horn County, Montana. It was in force for 62 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 13, 2001, 8:58 PM MDT (02:58 UTC)
Expired: Jul 13, 2001, 10:00 PM MDT
In force: 62 min
Issued by: NWS Billings, MT
Area: Whole counties

County Big Horn County, MT

The nearest sounding before it

Great_falls, MT (KTFX), launched 00:00Z, 3.0 hours before the alert went out and 329 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: 113 J/kg
Mixed-layer CIN: -40 J/kg
Mixed-layer LCL: 2628 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 21 m²/s²
0-3 km storm-relative helicity: 59 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 Jul 13, 7:00 PM MDT, 1 hour 58 minutes earlier.

Area forecast discussion, Jul 13, 7:00 PM MDT, 1 hour 58 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
Jul 13, 6:00 PM MDT	Severe Thunderstorm Warning	BYZ	Yellowstone	60 min
Jul 13, 6:17 PM MDT	Severe Thunderstorm Warning	BYZ	Stillwater	43 min
Jul 13, 6:30 PM MDT	Severe Thunderstorm Warning	BYZ	Golden Valley	60 min
Jul 13, 6:54 PM MDT	Severe Thunderstorm Warning	BYZ	Yellowstone	66 min
Jul 13, 7:33 PM MDT	Severe Thunderstorm Warning	BYZ	Musselshell	57 min
Jul 13, 7:35 PM MDT	Severe Thunderstorm Warning	BYZ	Stillwater	55 min
Jul 13, 8:00 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Yellowstone	60 min
Jul 13, 8:55 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Treasure	65 min
Jul 13, 9:25 PM MDT	Severe Thunderstorm Warning	BYZ	Yellowstone	65 min
Jul 13, 9:59 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn	61 min
Jul 13, 10:32 PM MDT	Severe Thunderstorm Warning	BYZ	Rosebud	58 min
Jul 14, 3:16 PM MDT	Severe Thunderstorm Warning	BYZ	Sweet Grass	59 min
Jul 14, 4:14 PM MDT	Severe Thunderstorm Warning	BYZ	Yellowstone	61 min
Jul 14, 4:29 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Powder River	61 min
Jul 14, 4:45 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn	60 min
Jul 14, 4:56 PM MDT	Severe Thunderstorm Warning	BYZ	Yellowstone	64 min
Jul 14, 5:14 PM MDT	Severe Thunderstorm Warning	BYZ	Wheatland	61 min
Jul 14, 5:47 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn	58 min
Jul 14, 5:56 PM MDT	Severe Thunderstorm Warning	BYZ	Yellowstone	34 min

Nearby

Flash Flood Warnings in Montana, 2001 Every flash flood warning in 2001

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.