Alert archive / Montana / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 65, NWS Billings, MT

June 6, 2018Big Horn County, Powder River County, Rosebud County, Montana; Sheridan County, Wyoming

NWS Billings, MT issued this severe thunderstorm warning at Jun 6, 2018, 6:57 PM MDT for Big Horn County, Powder River County, Rosebud County, Montana; Sheridan County, Wyoming. It was in force for 63 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 6, 2018, 6:57 PM MDT (00:57 UTC)
Expired
Jun 6, 2018, 8:00 PM MDT
In force
63 min
Issued by
NWS Billings, MT
Area
Storm-based polygon
Hail
1.5 in
Wind
60.0 mph

Counties Big Horn County, MT, Powder River County, MT, Rosebud County, MT, Sheridan County, WY

The radar

The Billings radar (KBLX), 156 km from the middle of the area, began a volume at 01:00 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 00:00Z, 1.0 hours before the alert went out and 299 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-pSkew-T log-p diagram, Riverton, WY at 00:00Z on 2018-06-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1035 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Riverton, WY at 00:00Z on 2018-06-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 37 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
1035 J/kg
Mixed-layer CIN
-57 J/kg
Mixed-layer LCL
2673 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
37 m²/s²
0-3 km storm-relative helicity
93 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 6, 3:13 PM MDT, 3 hours 44 minutes earlier.

Area forecast discussion, Jun 6, 3:13 PM MDT, 3 hours 44 minutes before
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Hazardous weather outlook, Jun 6, 2:55 PM MDT, 4 hours 2 minutes before
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In the hours before

Local storm report, Jun 6, 1:26 PM MDT, 5 hours 31 minutes before
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    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
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Special weather statement, Jun 6, 6:27 PM MDT, 30 minutes before
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<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
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      <p id="message2">
        Please try again in a few minutes.
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      <p class="small" id="detail">
        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, Jun 6, 6:46 PM MDT, 11 minutes before
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</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
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      <p class="small" id="detail">
        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.

IssuedProductOfficeCountiesLasted
Jun 6, 6:27 PM MDTSpecial Weather StatementBYZPark48 min
Jun 6, 7:52 PM MDTSpecial Weather StatementBYZPowder River38 min
Jun 6, 8:04 PM MDTSevere Thunderstorm WarningBYZPowder River56 min
Jun 6, 8:55 PM MDTSpecial Weather StatementBYZCuster50 min
Jun 6, 9:40 PM MDTSpecial Weather StatementBYZCuster50 min
Jun 7, 7:07 AM MDTSpecial Weather StatementBYZPark38 min
Jun 7, 9:22 AM MDTSpecial Weather StatementBYZGolden Valley38 min
Jun 7, 10:01 AM MDTSpecial Weather StatementBYZMusselshell44 min
Jun 7, 10:41 AM MDTSpecial Weather StatementBYZMusselshell34 min
Jun 7, 1:30 PM MDTSpecial Weather StatementBYZPark30 min
Jun 7, 2:16 PM MDTSpecial Weather StatementBYZStillwater59 min
Jun 7, 2:41 PM MDTSpecial Weather StatementBYZCarbon49 min
Jun 7, 2:57 PM MDTSpecial Weather StatementBYZFallon48 min
Jun 7, 3:10 PM MDTSpecial Weather StatementBYZYellowstone65 min
Jun 7, 3:59 PM MDTSpecial Weather StatementBYZYellowstone61 min
Jun 7, 4:09 PM MDTSevere Thunderstorm WarningBYZBig Horn, Carbon51 min
Jun 7, 4:31 PM MDTSpecial Weather StatementBYZ44 min
Jun 7, 4:41 PM MDTSpecial Weather StatementBYZBig Horn64 min
Jun 7, 4:53 PM MDTSevere Thunderstorm WarningBYZBig Horn, Treasure52 min
Jun 7, 4:57 PM MDTSevere Thunderstorm WarningBYZBig Horn63 min
Jun 7, 5:07 PM MDTSevere Thunderstorm WarningBYZBig Horn23 min
Jun 7, 5:27 PM MDTSevere Thunderstorm WarningBYZBig Horn, Treasure, Yellowstone48 min
Jun 7, 5:28 PM MDTSevere Thunderstorm WarningBYZBig Horn, Rosebud47 min
Jun 7, 5:38 PM MDTSevere Thunderstorm WarningBYZBig Horn, Rosebud37 min
Jun 7, 5:54 PM MDTSevere Thunderstorm WarningBYZRosebud66 min
Jun 6, 6:46 PM MDTSpecial Weather StatementBYZSheridan59 min
Jun 6, 8:13 PM MDTSevere Thunderstorm WarningBYZSheridan28 min
Jun 7, 5:18 PM MDTSpecial Weather StatementBYZSheridan42 min

Nearby

Severe Thunderstorm Warnings in Montana, 2018Severe Thunderstorm Warnings in Wyoming, 2018Every 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.