Alert archive / Montana / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 196, NWS Billings, MT

July 19, 2001Musselshell County, Montana

NWS Billings, MT issued this severe thunderstorm warning at Jul 19, 2001, 6:51 PM MDT for Musselshell County, Montana. It was in force for 54 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jul 19, 2001, 6:51 PM MDT (00:51 UTC)
Expired: Jul 19, 2001, 7:45 PM MDT
In force: 54 min
Issued by: NWS Billings, MT
Area: Whole counties

County Musselshell County, MT

The radar

The Billings radar (KBLX), 73 km from the middle of the area, began a volume at 00:54 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.

What was reported inside it

Time	Report	Where	Remark
Jul 19, 7:50 PM MDT	Hail 1.25	Roundup, MT

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The nearest sounding before it

Glasgow Intl Airport, MT (KGGW), launched 00:00Z, 0.9 hours before the alert went out and 235 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: 667 J/kg
Mixed-layer CIN: -57 J/kg
Mixed-layer LCL: 1843 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: -52 m²/s²
0-3 km storm-relative helicity: -3 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -2.2

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 Jul 19, 2:10 PM MDT, 4 hours 41 minutes earlier.

Area forecast discussion, Jul 19, 2:10 PM MDT, 4 hours 41 minutes before

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In the hours before

Local storm report, Jul 19, 3:30 PM MDT, 3 hours 21 minutes before

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<head>
  <meta charset="utf-8">
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  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</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.
      </p>
      <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.

Issued	Product	Office	Counties	Lasted
Jul 19, 6:15 PM MDT	Severe Thunderstorm Warning	BYZ	Carter	60 min
Jul 19, 6:40 PM MDT	Severe Thunderstorm Warning	BYZ	Stillwater, Yellowstone	35 min
Jul 19, 6:41 PM MDT	Severe Thunderstorm Warning	BYZ	Fallon	64 min
Jul 19, 7:14 PM MDT	Severe Thunderstorm Warning	BYZ	Wheatland	31 min
Jul 19, 7:15 PM MDT	Severe Thunderstorm Warning	BYZ	Yellowstone	60 min
Jul 19, 7:30 PM MDT	Tornado Warning	BYZ	Fallon	30 min
Jul 19, 7:42 PM MDT	Severe Thunderstorm Warning	BYZ	Musselshell, Yellowstone	63 min
Jul 19, 8:41 PM MDT	Severe Thunderstorm Warning	BYZ	Treasure	34 min
Jul 20, 4:23 PM MDT	Severe Thunderstorm Warning	BYZ	Powder River	67 min

Nearby

Severe Thunderstorm Warnings in Montana, 2001 Every severe thunderstorm warning in 2001

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.