Alert archive / Montana / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 39, NWS Glasgow, MT

June 6, 2018Dawson County, Prairie County, Wibaux County, Montana

NWS Glasgow, MT issued this severe thunderstorm warning at Jun 6, 2018, 11:04 PM MDT for Dawson County, Prairie County, Wibaux County, Montana. It was in force for 26 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, 11:04 PM MDT (05:04 UTC)
Expired: Jun 6, 2018, 11:30 PM MDT
In force: 26 min
Issued by: NWS Glasgow, MT
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Dawson County, MT, Prairie County, MT, Wibaux County, MT

The radar

The Glasgow radar (KGGW), 187 km from the middle of the area, began a volume at 05:05 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

Rapid City, SD (KRAP), launched 00:00Z, 5.1 hours before the alert went out and 363 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: 1030 J/kg
Mixed-layer CIN: -214 J/kg
Mixed-layer LCL: 1469 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 44 m²/s²
0-3 km storm-relative helicity: 175 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

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 Glasgow, MT wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 6, 6:33 PM MDT, 4 hours 31 minutes earlier.

Area forecast discussion, Jun 6, 6:33 PM MDT, 4 hours 31 minutes before

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In the hours before

Special weather statement, Jun 6, 8:42 PM MDT, 2 hours 22 minutes before

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Special weather statement, Jun 6, 10:31 PM MDT, 33 minutes before

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  <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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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 6, 8:42 PM MDT	Special Weather Statement	GGW	Phillips	63 min
Jun 6, 10:31 PM MDT	Special Weather Statement	GGW	Wibaux	44 min
Jun 7, 10:02 AM MDT	Special Weather Statement	GGW	Petroleum	58 min
Jun 7, 10:16 AM MDT	Severe Thunderstorm Warning	GGW	Petroleum	44 min
Jun 7, 12:08 PM MDT	Special Weather Statement	GGW	Phillips	37 min
Jun 7, 12:46 PM MDT	Special Weather Statement	GGW	Phillips	44 min
Jun 7, 1:28 PM MDT	Special Weather Statement	GGW	Phillips	62 min
Jun 7, 5:12 PM MDT	Special Weather Statement	GGW	Valley	48 min
Jun 7, 5:57 PM MDT	Special Weather Statement	GGW	Valley	48 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.