Alert archive / Montana / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 35, NWS Billings, MT

June 23, 2011Big Horn County, Carbon County, Montana

NWS Billings, MT issued this severe thunderstorm warning at Jun 23, 2011, 4:57 PM MDT for Big Horn County, Carbon County, Montana. It was in force for 46 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 23, 2011, 4:57 PM MDT (22:57 UTC)
Expired
Jun 23, 2011, 5:43 PM MDT
In force
46 min
Issued by
NWS Billings, MT
Area
Storm-based polygon

Counties Big Horn County, MT, Carbon County, MT

The radar

The Billings radar (KBLX), 65 km from the middle of the area, began a volume at 22:59 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, 11.0 hours before the alert went out and 251 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 12:00Z on 2011-06-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 12:00Z on 2011-06-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 12 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2383 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
12 m²/s²
0-3 km storm-relative helicity
62 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 23, 3:31 PM MDT, 1 hour 26 minutes earlier.

Area forecast discussion, Jun 23, 3:31 PM MDT, 1 hour 26 minutes before
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Hazardous weather outlook, Jun 23, 3:58 PM MDT, 59 minutes before
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In the hours before

Special weather statement, Jun 23, 3:29 PM MDT, 1 hour 28 minutes before
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Special weather statement, Jun 23, 4:29 PM MDT, 28 minutes before
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<body>
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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>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
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        Please try again in a few minutes.
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The office that day

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

IssuedProductOfficeCountiesLasted
Jun 23, 1:30 PM MDTRiver Flood WarningBYZCarbon17 days
Jun 23, 1:50 PM MDTRiver Flood WarningBYZSweet Grass67 hr
Jun 23, 3:17 PM MDTRiver Flood WarningBYZStillwater, Yellowstone15 days
Jun 23, 3:17 PM MDTRiver Flood WarningBYZRosebud, Treasure19 days
Jun 23, 3:17 PM MDTRiver Flood WarningBYZCuster18 days
Jun 23, 3:29 PM MDTSpecial Weather StatementBYZCarbon61 min
Jun 23, 4:29 PM MDTSpecial Weather StatementBYZ61 min
Jun 23, 5:07 PM MDTSpecial Weather StatementBYZSweet Grass53 min
Jun 23, 5:34 PM MDTSpecial Weather StatementBYZYellowstone56 min
Jun 23, 1:30 PM MDTAreal Flood WarningBYZSheridan8 days
Jun 23, 5:48 PM MDTSpecial Weather StatementBYZSheridan57 min

Nearby

Severe Thunderstorm Warnings in Montana, 2011Every severe thunderstorm warning in 2011

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.