Alert archive / Montana / Flash Flood Warnings in 2019

Flash Flood Warning 2, NWS Billings, MT

May 26, 2019Big Horn County, Yellowstone County, Montana

NWS Billings, MT issued this flash flood warning at May 26, 2019, 8:42 PM MDT for Big Horn County, Yellowstone County, Montana. It was in force for 6 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: May 26, 2019, 8:42 PM MDT (02:42 UTC)
Expired: May 27, 2019, 2:45 AM MDT
In force: 6 hr
Issued by: NWS Billings, MT
Area: Storm-based polygon
Flood severity: None

Counties Big Horn County, MT, Yellowstone County, MT

The nearest sounding before it

Riverton, WY (KRIW), launched 00:00Z, 2.7 hours before the alert went out and 293 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: 259 J/kg
Mixed-layer CIN: -31 J/kg
Mixed-layer LCL: 2520 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 74 m²/s²
0-3 km storm-relative helicity: 168 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.3

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 May 26, 3:09 PM MDT, 5 hours 33 minutes earlier.

Area forecast discussion, May 26, 3:09 PM MDT, 5 hours 33 minutes before

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Hazardous weather outlook, May 26, 5:28 AM MDT, 15 hours 14 minutes before

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In the hours before

Local storm report, May 26, 6:57 PM MDT, 1 hour 45 minutes before

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Special weather statement, May 26, 7:04 PM MDT, 1 hour 38 minutes before

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Special weather statement, May 26, 7:39 PM MDT, 1 hour 3 minutes before

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Special weather statement, May 26, 7:57 PM MDT, 45 minutes before

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Local storm report, May 26, 8:29 PM MDT, 13 minutes before

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Special weather statement, May 26, 8:37 PM MDT, 5 minutes before

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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
May 26, 6:02 PM MDT	Special Weather Statement	BYZ	Carter, Powder River	58 min
May 26, 6:10 PM MDT	Special Weather Statement	BYZ	Golden Valley	65 min
May 26, 6:10 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Powder River	50 min
May 26, 7:04 PM MDT	Special Weather Statement	BYZ	Carter, Powder River	56 min
May 26, 7:04 PM MDT	Severe Thunderstorm Warning	BYZ	Golden Valley, Musselshell, Stillwater, Yellowstone	56 min
May 26, 7:14 PM MDT	Areal Flood Warning	BYZ	Wheatland	11 hr
May 26, 7:39 PM MDT	Special Weather Statement	BYZ	Yellowstone	51 min
May 26, 7:41 PM MDT	Flash Flood Warning	BYZ	Golden Valley, Stillwater, Yellowstone	4 hr
May 26, 7:52 PM MDT	Severe Thunderstorm Warning	BYZ	Golden Valley, Musselshell, Yellowstone	53 min
May 26, 7:57 PM MDT	Special Weather Statement	BYZ	Custer	63 min
May 26, 8:37 PM MDT	Special Weather Statement	BYZ	Yellowstone	53 min
May 26, 9:02 PM MDT	Special Weather Statement	BYZ	Yellowstone	43 min
May 26, 9:15 PM MDT	Severe Thunderstorm Warning	BYZ	Yellowstone	30 min
May 26, 9:26 PM MDT	Severe Thunderstorm Warning	BYZ	Musselshell	34 min
May 26, 9:33 PM MDT	Special Weather Statement	BYZ	Yellowstone	57 min
May 26, 9:47 PM MDT	Special Weather Statement	BYZ	Yellowstone	43 min
May 27, 12:12 AM MDT	Special Weather Statement	BYZ	Treasure	48 min
May 27, 12:37 PM MDT	Areal Flood Warning	BYZ	Big Horn	11 hr
May 27, 3:22 AM MDT	Winter Weather Advisory	BYZ		32 hr

Nearby

Flash Flood Warnings in Montana, 2019 Every flash flood warning in 2019

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.