Alert archive / Montana / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 249, NWS Billings, MT

July 25, 2001Fallon County, Montana

NWS Billings, MT issued this severe thunderstorm warning at Jul 25, 2001, 3:28 AM MDT for Fallon County, Montana. It was in force for 47 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 25, 2001, 3:28 AM MDT (09:28 UTC)
Expired: Jul 25, 2001, 4:15 AM MDT
In force: 47 min
Issued by: NWS Billings, MT
Area: Whole counties

County Fallon County, MT

What was reported inside it

Time	Report	Where	Remark
Jul 25, 3:58 AM MDT	Hail 0.75	Baker, 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 25, 12:45 AM MDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Glasgow Intl Airport, MT (KGGW), launched 00:00Z, 9.5 hours before the alert went out and 267 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: 873 J/kg
Mixed-layer CIN: -24 J/kg
Mixed-layer LCL: 1463 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 210 m²/s²
0-3 km storm-relative helicity: 329 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 7.7

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 25, 2:21 AM MDT, 1 hour 7 minutes earlier.

Area forecast discussion, Jul 25, 2:21 AM MDT, 1 hour 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>

In the hours before

Special weather statement, Jul 25, 3:27 AM MDT, 1 minute 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 Billings, MT issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 24, 10:42 PM MDT	Severe Thunderstorm Warning	BYZ	Yellowstone	63 min
Jul 24, 11:48 PM MDT	Severe Thunderstorm Warning	BYZ	Big Horn, Yellowstone	57 min
Jul 25, 12:43 AM MDT	Severe Thunderstorm Warning	BYZ	Big Horn	62 min
Jul 25, 12:44 AM MDT	Severe Thunderstorm Warning	BYZ	Rosebud	61 min
Jul 25, 1:31 AM MDT	Flash Flood Warning	BYZ	Treasure	119 min
Jul 25, 1:33 AM MDT	Severe Thunderstorm Warning	BYZ	Custer	57 min
Jul 25, 1:43 AM MDT	Flash Flood Warning	BYZ	Custer, Rosebud	3 hr
Jul 25, 1:45 AM MDT	Severe Thunderstorm Warning	BYZ	Rosebud	60 min
Jul 25, 3:36 AM MDT	Severe Thunderstorm Warning	BYZ	Carter	69 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.