Alert archive / Montana / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 34, NWS Billings, MT

June 19, 2015Custer County, Powder River County, Rosebud County, Montana

NWS Billings, MT issued this severe thunderstorm warning at Jun 19, 2015, 2:51 PM MDT for Custer County, Powder River County, Rosebud County, Montana. It was in force for 54 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: Jun 19, 2015, 2:51 PM MDT (20:51 UTC)
Expired: Jun 19, 2015, 3:45 PM MDT
In force: 54 min
Issued by: NWS Billings, MT
Area: Storm-based polygon
Tornado: Possible
Hail: 1.25 in
Wind: 60.0 mph

Counties Custer County, MT, Powder River County, MT, Rosebud County, MT

The radar

The Billings radar (KBLX), 204 km from the middle of the area, began a volume at 20:51 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 19, 2:51 PM MDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Glasgow Intl Airport, MT (KGGW), launched 12:00Z, 8.9 hours before the alert went out and 256 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: 181 J/kg
Mixed-layer CIN: -225 J/kg
Mixed-layer LCL: 1086 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 86 m²/s²
0-3 km storm-relative helicity: 85 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 severe thunderstorm 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 severe thunderstorm warning went out at Jun 19, 9:37 AM MDT, 5 hours 14 minutes earlier.

Area forecast discussion, Jun 19, 9:37 AM MDT, 5 hours 14 minutes before

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Hazardous weather outlook, Jun 19, 4:05 AM MDT, 10 hours 46 minutes before

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In the hours before

Local storm report, Jun 19, 9:52 AM MDT, 4 hours 59 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BILLINGS MT
952 AM MDT FRI JUN 19 2015

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1225 AM     TSTM WND DMG     BROADUS                 45.44N 105.41W
06/19/2015                   POWDER RIVER       MT   TRAINED SPOTTER

            TREE LIMBS DOWN ALL OVER TOWN WITH POWER OUTAGES. PEA
            SIZED HAIL ALSO REPORTED.

&&

TNF

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 18, 7:37 PM MDT	Special Weather Statement	BYZ	Stillwater	53 min
Jun 18, 8:23 PM MDT	Special Weather Statement	BYZ	Stillwater	52 min
Jun 18, 8:56 PM MDT	Special Weather Statement	BYZ	Yellowstone	64 min
Jun 18, 9:02 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Yellowstone	45 min
Jun 18, 9:33 PM MDT	Special Weather Statement	BYZ	Stillwater	42 min
Jun 18, 9:44 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn	61 min
Jun 18, 10:20 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Rosebud	55 min
Jun 18, 11:10 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Powder River, Rosebud	65 min
Jun 19, 12:10 AM MDT	Severe Thunderstorm Warning	BYZ	Carter, Powder River	65 min
Jun 19, 1:12 AM MDT	Severe Thunderstorm Warning	BYZ	Carter	29 min
Jun 19, 1:50 AM MDT	Special Weather Statement	BYZ	Powder River	40 min
Jun 19, 2:55 PM MDT	Special Weather Statement	BYZ	Prairie	65 min
Jun 19, 3:13 PM MDT	Severe Thunderstorm Warning	BYZ	Custer, Rosebud	62 min
Jun 19, 3:40 PM MDT	Severe Thunderstorm Warning	BYZ	Custer, Powder River	65 min
Jun 19, 3:49 PM MDT	Tornado Warning	BYZ	Custer, Powder River	26 min
Jun 19, 3:58 PM MDT	Severe Thunderstorm Warning	BYZ	Custer	62 min
Jun 19, 4:12 PM MDT	Tornado Warning	BYZ	Custer, Powder River	33 min
Jun 19, 4:18 PM MDT	Special Weather Statement	BYZ	Yellowstone	57 min
Jun 19, 4:20 PM MDT	Severe Thunderstorm Warning	BYZ	Fallon	55 min
Jun 19, 4:30 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Yellowstone	60 min
Jun 19, 4:33 PM MDT	Flash Flood Warning	BYZ	Yellowstone	6 hr
Jun 19, 4:41 PM MDT	Severe Thunderstorm Warning	BYZ	Carter, Powder River	64 min
Jun 19, 5:05 PM MDT	Severe Thunderstorm Warning	BYZ	Fallon	55 min
Jun 19, 5:19 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn	56 min
Jun 19, 5:36 PM MDT	Special Weather Statement	BYZ	Powder River	24 min
Jun 19, 5:39 PM MDT	Severe Thunderstorm Warning	BYZ	Carter	66 min
Jun 18, 10:10 PM MDT	Special Weather Statement	BYZ	Sheridan	65 min

Nearby

Severe Thunderstorm Warnings in Montana, 2015 Every severe thunderstorm warning in 2015

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.