Alert archive / Nebraska / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 102, NWS Cheyenne, WY

August 21, 1990Garden County, Nebraska

NWS Cheyenne, WY issued this severe thunderstorm warning at Aug 21, 1990, 6:54 PM MDT for Garden County, Nebraska. It was in force for 44 min.

The area

The counties it named.

The facts

Issued: Aug 21, 1990, 6:54 PM MDT (00:54 UTC)
Expired: Aug 21, 1990, 7:38 PM MDT
In force: 44 min
Issued by: NWS Cheyenne, WY
Area: Whole counties

County Garden County, NE

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 0.9 hours before the alert went out and 155 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: 2919 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 1135 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 89 m²/s²
0-3 km storm-relative helicity: 156 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 6.9

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 21, 2:21 PM MDT, 4 hours 33 minutes before

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Special weather statement, Aug 21, 3:15 PM MDT, 3 hours 39 minutes before

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Special weather statement, Aug 21, 4:27 PM MDT, 2 hours 27 minutes before

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Special weather statement, Aug 21, 5:33 PM MDT, 1 hour 21 minutes before

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<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.
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      <p id="message2">
        Please try again in a few minutes.
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        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 22, 1:11 PM MDT	Severe Thunderstorm Warning	CYS	Dawes	64 min
Aug 22, 1:31 PM MDT	Tornado Warning	CYS	Box Butte	29 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 1990 Every severe thunderstorm warning in 1990

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.