Alert archive / Colorado / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 170, NWS Denver/Boulder, CO

July 24, 1996Arapahoe County, Douglas County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jul 24, 1996, 9:48 PM MDT for Arapahoe County, Douglas County, Colorado. It was in force for 42 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 24, 1996, 9:48 PM MDT (03:48 UTC)
Expired: Jul 24, 1996, 10:30 PM MDT
In force: 42 min
Issued by: NWS Denver/Boulder, CO
Area: Whole counties

Counties Arapahoe County, CO, Douglas County, CO

The radar

The Denver radar (KFTG), 34 km from the middle of the area, began a volume at 03:52 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

Denver, CO (KDNR), launched 00:00Z, 3.8 hours before the alert went out and 127 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: 1208 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 1690 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 5 m²/s²
0-3 km storm-relative helicity: 164 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 6.5

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.

In the hours before

Special weather statement, Jul 24, 4:57 PM MDT, 4 hours 51 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>

Special weather statement, Jul 24, 8:18 PM MDT, 1 hour 30 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 Denver/Boulder, CO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 24, 11:12 PM MDT	Severe Thunderstorm Warning	BOU	Arapahoe, Elbert	33 min
Jul 24, 11:46 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Arapahoe	44 min
Jul 25, 4:17 PM MDT	Severe Thunderstorm Warning	BOU	Washington	73 min
Jul 25, 4:19 PM MDT	Severe Thunderstorm Warning	BOU	Elbert	71 min
Jul 25, 4:26 PM MDT	Severe Thunderstorm Warning	BOU	Larimer	64 min
Jul 25, 4:31 PM MDT	Severe Thunderstorm Warning	BOU	Larimer	59 min
Jul 25, 4:50 PM MDT	Severe Thunderstorm Warning	BOU	Lincoln, Washington	40 min
Jul 25, 5:30 PM MDT	Severe Thunderstorm Warning	BOU	Washington	45 min
Jul 25, 5:37 PM MDT	Severe Thunderstorm Warning	BOU	Sedgwick	38 min
Jul 25, 5:54 PM MDT	Severe Thunderstorm Warning	BOU	Logan, Sedgwick	21 min

Nearby

Severe Thunderstorm Warnings in Colorado, 1996 Every severe thunderstorm warning in 1996

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.