Alert archive / Nebraska / Flash Flood Warnings in 1992

Flash Flood Warning 18, NWS Omaha, NE

July 30, 1992Nemaha County, Otoe County, Richardson County, Nebraska

NWS Omaha, NE issued this flash flood warning at Jul 30, 1992, 5:00 AM CDT for Nemaha County, Otoe County, Richardson County, Nebraska. It was in force for 19 hr.

The area

The counties it named.

The facts

Issued
Jul 30, 1992, 5:00 AM CDT (10:00 UTC)
Expired
Jul 31, 1992, 12:00 AM CDT
In force
19 hr
Issued by
NWS Omaha, NE
Area
Whole counties

Counties Nemaha County, NE, Otoe County, NE, Richardson County, NE

The nearest sounding before it

Omaha, NE (KOVN), launched 00:00Z, 10.0 hours before the alert went out and 111 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, Omaha, NE at 00:00Z on 1992-07-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2191 joules per kilogram.LCLEL10008507005003002001001 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, Omaha, NE at 00:00Z on 1992-07-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 46 square meters per square second.19395878Sfc1 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
2191 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
729 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
46 m²/s²
0-3 km storm-relative helicity
204 m²/s²
Significant tornado parameter
1.8
Supercell composite
9.8

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 flash flood 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 29, 11:36 PM CDT, 5 hours 24 minutes before
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Special weather statement, Jul 29, 11:36 PM CDT, 5 hours 24 minutes before
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Special weather statement, Jul 30, 12:20 AM CDT, 4 hours 40 minutes before
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Special weather statement, Jul 30, 12:27 AM CDT, 4 hours 33 minutes before
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  <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 Omaha, NE issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 29, 10:20 PM CDTFlash Flood WarningOAXRichardson5 hr
Jul 29, 11:01 PM CDTSevere Thunderstorm WarningOAXNemaha29 min
Jul 30, 12:42 AM CDTFlash Flood WarningOAXJohnson, Pawnee4 hr
Jul 30, 12:49 AM CDTFlash Flood WarningOAXNemaha4 hr
Jul 30, 2:58 AM CDTFlash Flood WarningOAXOtoe3 hr
Jul 30, 2:58 AM CDTFlash Flood WarningOAXRichardson3 hr
Jul 29, 10:53 PM CDTSevere Thunderstorm WarningOAXMontgomery37 min

Nearby

Flash Flood Warnings in Nebraska, 1992Every flash flood warning in 1992

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.