Alert archive / Montana / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 166, NWS Billings, MT

August 2, 2018Park County, Montana

NWS Billings, MT issued this severe thunderstorm warning at Aug 2, 2018, 5:58 PM MDT for Park County, Montana. It was in force for 50 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: Aug 2, 2018, 5:58 PM MDT (23:58 UTC)
Expired: Aug 2, 2018, 6:48 PM MDT
In force: 50 min
Issued by: NWS Billings, MT
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Park County, MT

The radar

The Billings radar (KBLX), 155 km from the middle of the area, began a volume at 00:00 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

Riverton, WY (KRIW), launched 12:00Z, 12.0 hours before the alert went out and 318 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: 9 J/kg
Mixed-layer CIN: -355 J/kg
Mixed-layer LCL: 2881 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 104 m²/s²
0-3 km storm-relative helicity: 84 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 Aug 2, 3:29 PM MDT, 2 hours 29 minutes earlier.

Area forecast discussion, Aug 2, 3:29 PM MDT, 2 hours 29 minutes before

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Hazardous weather outlook, Aug 2, 3:36 PM MDT, 2 hours 22 minutes before

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In the hours before

Special weather statement, Aug 2, 4:06 PM MDT, 1 hour 52 minutes before

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Special weather statement, Aug 2, 4:28 PM MDT, 1 hour 30 minutes before

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Special weather statement, Aug 2, 5:02 PM MDT, 56 minutes before

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Special weather statement, Aug 2, 5:31 PM MDT, 27 minutes before

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Local storm report, Aug 2, 5:46 PM MDT, 12 minutes before

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Special weather statement, Aug 2, 5:58 PM MDT, 0 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 1, 8:46 PM MDT	Special Weather Statement	BYZ	Wheatland	29 min
Aug 2, 1:27 PM MDT	Special Weather Statement	BYZ	Sweet Grass	33 min
Aug 2, 1:57 PM MDT	Special Weather Statement	BYZ	Stillwater	63 min
Aug 2, 2:32 PM MDT	Severe Thunderstorm Warning	BYZ	Carbon, Stillwater, Yellowstone	28 min
Aug 2, 2:46 PM MDT	Special Weather Statement	BYZ	Carbon	44 min
Aug 2, 2:57 PM MDT	Severe Thunderstorm Warning	BYZ	Carbon, Stillwater, Yellowstone	48 min
Aug 2, 3:35 PM MDT	Special Weather Statement	BYZ	Carbon	40 min
Aug 2, 3:42 PM MDT	Special Weather Statement	BYZ	Yellowstone	48 min
Aug 2, 4:06 PM MDT	Special Weather Statement	BYZ	Big Horn	24 min
Aug 2, 4:28 PM MDT	Special Weather Statement	BYZ	Big Horn	47 min
Aug 2, 5:31 PM MDT	Special Weather Statement	BYZ	Park	59 min
Aug 2, 5:02 PM MDT	Special Weather Statement	BYZ	Sheridan	43 min
Aug 2, 5:58 PM MDT	Special Weather Statement	BYZ	Sheridan	32 min

Nearby

Severe Thunderstorm Warnings in Montana, 2018 Every severe thunderstorm warning in 2018

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.