Alert archive / Nebraska / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 140, NWS Cheyenne, WY

August 9, 1998Cheyenne County, Nebraska

NWS Cheyenne, WY issued this severe thunderstorm warning at Aug 9, 1998, 8:08 PM MDT for Cheyenne County, Nebraska. It was in force for 37 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: Aug 9, 1998, 8:08 PM MDT (02:08 UTC)
Expired: Aug 9, 1998, 8:45 PM MDT
In force: 37 min
Issued by: NWS Cheyenne, WY
Area: Whole counties

County Cheyenne County, NE

The nearest sounding before it

Denver, CO (KDNR), launched 00:00Z, 2.1 hours before the alert went out and 151 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: 325 J/kg
Mixed-layer CIN: -57 J/kg
Mixed-layer LCL: 2136 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 14 m²/s²
0-3 km storm-relative helicity: 73 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.2

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.

In the hours before

Special weather statement, Aug 9, 4:53 PM MDT, 3 hours 15 minutes before

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Special weather statement, Aug 9, 4:53 PM MDT, 3 hours 15 minutes before

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Special weather statement, Aug 9, 5:33 PM MDT, 2 hours 35 minutes before

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Special weather statement, Aug 9, 5:33 PM MDT, 2 hours 35 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.
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The office that day

Everything else NWS Cheyenne, WY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 9, 6:26 PM MDT	Severe Thunderstorm Warning	CYS	Cheyenne, Morrill	49 min
Aug 10, 2:11 PM MDT	Severe Thunderstorm Warning	CYS	Laramie	54 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 1998 Every severe thunderstorm warning in 1998

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.