Alert archive / Montana / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 61, NWS Glasgow, MT

July 4, 2000Petroleum County, Montana

NWS Glasgow, MT issued this severe thunderstorm warning at Jul 4, 2000, 1:37 PM MDT for Petroleum County, Montana. It was in force for 53 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 4, 2000, 1:37 PM MDT (19:37 UTC)
Expired
Jul 4, 2000, 2:30 PM MDT
In force
53 min
Issued by
NWS Glasgow, MT
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Petroleum County, MT

The radar

The Billings radar (KBLX), 143 km from the middle of the area, began a volume at 19:43 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

TimeReportWhereRemark
Jul 4, 2:15 PM MDTHail 1Cat Creek, 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 12:00Z, 7.6 hours before the alert went out and 174 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, Glasgow Intl Airport, MT at 12:00Z on 2000-07-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 19 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Glasgow Intl Airport, MT at 12:00Z on 2000-07-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -44 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
19 J/kg
Mixed-layer CIN
-287 J/kg
Mixed-layer LCL
780 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
-44 m²/s²
0-3 km storm-relative helicity
1 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 Glasgow, MT wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 4, 9:30 AM MDT, 4 hours 7 minutes earlier.

Area forecast discussion, Jul 4, 9:30 AM MDT, 4 hours 7 minutes before
<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <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.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 3, 6:18 PM MDTSevere Thunderstorm WarningGGWGarfield57 min
Jul 3, 6:37 PM MDTSevere Thunderstorm WarningGGWPhillips, Valley53 min
Jul 3, 7:11 PM MDTSevere Thunderstorm WarningGGWGarfield64 min
Jul 3, 7:16 PM MDTSevere Thunderstorm WarningGGWValley59 min
Jul 3, 7:25 PM MDTTornado WarningGGWValley65 min
Jul 3, 7:35 PM MDTSevere Thunderstorm WarningGGWMcCone55 min
Jul 3, 8:08 PM MDTSevere Thunderstorm WarningGGWRoosevelt67 min
Jul 3, 8:15 PM MDTSevere Thunderstorm WarningGGWGarfield60 min
Jul 3, 8:24 PM MDTSevere Thunderstorm WarningGGWDaniels66 min
Jul 3, 8:27 PM MDTSevere Thunderstorm WarningGGWMcCone63 min
Jul 3, 9:05 PM MDTTornado WarningGGWRoosevelt55 min
Jul 3, 9:26 PM MDTSevere Thunderstorm WarningGGWMcCone64 min
Jul 3, 9:47 PM MDTSevere Thunderstorm WarningGGWRichland58 min
Jul 3, 9:52 PM MDTSevere Thunderstorm WarningGGWRoosevelt53 min
Jul 3, 10:09 PM MDTSevere Thunderstorm WarningGGWDawson66 min
Jul 3, 10:41 PM MDTSevere Thunderstorm WarningGGWRichland64 min
Jul 3, 11:34 PM MDTSevere Thunderstorm WarningGGWDawson56 min
Jul 4, 12:35 AM MDTSevere Thunderstorm WarningGGWPrairie55 min
Jul 4, 2:27 PM MDTSevere Thunderstorm WarningGGWGarfield63 min
Jul 4, 3:25 PM MDTSevere Thunderstorm WarningGGWGarfield65 min
Jul 4, 4:11 PM MDTTornado WarningGGWGarfield49 min
Jul 4, 4:24 PM MDTTornado WarningGGWMcCone66 min
Jul 4, 5:26 PM MDTSevere Thunderstorm WarningGGWMcCone64 min
Jul 4, 5:55 PM MDTSevere Thunderstorm WarningGGWDawson65 min

Nearby

Severe Thunderstorm Warnings in Montana, 2000Every severe thunderstorm warning in 2000

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.