Alert archive / Montana / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 42, NWS Great Falls, MT

July 4, 2008Glacier County, Montana

NWS Great Falls, MT issued this severe thunderstorm warning at Jul 4, 2008, 1:03 PM MDT for Glacier County, Montana. It was in force for 27 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
Jul 4, 2008, 1:03 PM MDT (19:03 UTC)
Expired
Jul 4, 2008, 1:30 PM MDT
In force
27 min
Issued by
NWS Great Falls, MT
Area
Storm-based polygon

County Glacier County, MT

The nearest sounding before it

Great_falls, MT (KTFX), launched 12:00Z, 7.1 hours before the alert went out and 225 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, Great_falls, MT at 12:00Z on 2008-07-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 32 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, Great_falls, MT at 12:00Z on 2008-07-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 132 square meters per square second.193958Sfc1 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
32 J/kg
Mixed-layer CIN
-527 J/kg
Mixed-layer LCL
2745 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
132 m²/s²
0-3 km storm-relative helicity
109 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 Great Falls, MT wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 4, 11:40 AM MDT, 1 hour 23 minutes earlier.

Area forecast discussion, Jul 4, 11:40 AM MDT, 1 hour 23 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>
Hazardous weather outlook, Jul 4, 6:24 AM MDT, 6 hours 39 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 Great Falls, MT issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 4, 3:50 PM MDTSevere Thunderstorm WarningTFXPondera40 min
Jul 4, 3:56 PM MDTSevere Thunderstorm WarningTFXLewis and Clark49 min
Jul 4, 4:10 PM MDTSevere Thunderstorm WarningTFXChouteau, Fergus, Judith Basin50 min
Jul 4, 4:10 PM MDTSevere Thunderstorm WarningTFXJudith Basin, Meagher25 min
Jul 4, 4:38 PM MDTSevere Thunderstorm WarningTFXJudith Basin67 min
Jul 4, 4:41 PM MDTTornado WarningTFXLewis and Clark34 min
Jul 4, 4:48 PM MDTSevere Thunderstorm WarningTFXPondera, Teton42 min
Jul 4, 4:57 PM MDTSevere Thunderstorm WarningTFXGlacier48 min
Jul 4, 5:06 PM MDTSevere Thunderstorm WarningTFXCascade, Meagher39 min
Jul 4, 5:08 PM MDTSevere Thunderstorm WarningTFXCascade, Lewis and Clark52 min
Jul 4, 5:13 PM MDTSevere Thunderstorm WarningTFXGlacier, Pondera47 min
Jul 4, 5:18 PM MDTSevere Thunderstorm WarningTFXFergus40 min
Jul 4, 5:23 PM MDTSevere Thunderstorm WarningTFXFergus, Judith Basin34 min
Jul 4, 5:26 PM MDTSevere Thunderstorm WarningTFXPondera, Toole49 min
Jul 4, 5:38 PM MDTSevere Thunderstorm WarningTFXCascade, Lewis and Clark, Teton52 min
Jul 4, 5:45 PM MDTSevere Thunderstorm WarningTFXCascade, Meagher45 min
Jul 4, 5:52 PM MDTSevere Thunderstorm WarningTFXGlacier38 min
Jul 4, 5:57 PM MDTSevere Thunderstorm WarningTFXLewis and Clark, Teton63 min

Nearby

Severe Thunderstorm Warnings in Montana, 2008Every severe thunderstorm warning in 2008

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.