Alert archive / Nebraska / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 334, NWS Omaha, NE

October 4, 1998Washington County, Nebraska; Harrison County, Iowa

NWS Omaha, NE issued this severe thunderstorm warning at Oct 4, 1998, 12:45 PM CDT for Washington County, Nebraska; Harrison County, Iowa. It was in force for 35 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
Oct 4, 1998, 12:45 PM CDT (17:45 UTC)
Expired
Oct 4, 1998, 1:20 PM CDT
In force
35 min
Issued by
NWS Omaha, NE
Area
Whole counties

Counties Harrison County, IA, Washington County, NE

The radar

The Omaha radar (KOAX), 43 km from the middle of the area, began a volume at 17:47 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

Omaha, NE (KOAX), launched 12:00Z, 5.8 hours before the alert went out and 43 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 12:00Z on 1998-10-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 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 12:00Z on 1998-10-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 65 square meters per square second.193958Sfc1 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
1 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
557 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
65 m²/s²
0-3 km storm-relative helicity
114 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, Oct 4, 11:10 AM CDT, 1 hour 35 minutes before
NEZ011-012-015>018-030>034-042>045-050>053-065>068-078-088>093-
IAZ043-055-056-069-079-080-090-091-051200-

SEVERE WEATHER OUTLOOK
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
1110 AM CDT SUN OCT 4 1998

...SEVERE WEATHER OUTLOOK FOR EASTERN NEBRASKA AND SOUTHWEST IOWA...

SPOTTER ACTION...
STORM SPOTTERS ACTIVATION MAY BE REQUIRED OVER EASTERN NEBRASKA
AND SOUTHWEST IOWA THIS AFTERNOON AND TONIGHT.

DISCUSSION...
A STRONG STORM CIRCULATION OVER THE CENTRAL AND SOUTHERN PLAINS WILL
RECEIVE EVEN STRONGER SUPPORT ALOFT THIS AFTERNOON AND TONIGHT.  THE
GREATEST THREAT FOR SEVERE WEATHER IS TO THE SOUTH IN EASTERN KANSAS AND
OKLAHOMA BUT THERE IS A GOOD CHANCE OF THE SEVERE WEATHER AFFECTING
EASTERN NEBRASKA AND SOUTHWEST IOWA ALSO.

IN ADDITION TO THE THREAT OF SEVERE WEATHER...THE THUNDERSTORMS COULD
CAUSE SOME LOCAL FLOODING FROM HEAVY RAINS...ESPECIALLY IN SOUTHEAST
NEBRASKA WHERE HEAVIER RAINS HAVE OCCURRED PERIODICALLY OVER THE LAST6
COUPLE OF WEEKS.

POWERS
Special weather statement, Oct 4, 11:10 AM CDT, 1 hour 35 minutes before
NEZ011-012-015>018-030>034-042>045-050>053-065>068-078-088>093-
IAZ043-055-056-069-079-080-090-091-051200-

SEVERE WEATHER OUTLOOK
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
1110 AM CDT SUN OCT 4 1998

...SEVERE WEATHER OUTLOOK FOR EASTERN NEBRASKA AND SOUTHWEST IOWA...

SPOTTER ACTION...
STORM SPOTTERS ACTIVATION MAY BE REQUIRED OVER EASTERN NEBRASKA
AND SOUTHWEST IOWA THIS AFTERNOON AND TONIGHT.

DISCUSSION...
A STRONG STORM CIRCULATION OVER THE CENTRAL AND SOUTHERN PLAINS WILL
RECEIVE EVEN STRONGER SUPPORT ALOFT THIS AFTERNOON AND TONIGHT.  THE
GREATEST THREAT FOR SEVERE WEATHER IS TO THE SOUTH IN EASTERN KANSAS AND
OKLAHOMA BUT THERE IS A GOOD CHANCE OF THE SEVERE WEATHER AFFECTING
EASTERN NEBRASKA AND SOUTHWEST IOWA ALSO.

IN ADDITION TO THE THREAT OF SEVERE WEATHER...THE THUNDERSTORMS COULD
CAUSE SOME LOCAL FLOODING FROM HEAVY RAINS...ESPECIALLY IN SOUTHEAST
NEBRASKA WHERE HEAVIER RAINS HAVE OCCURRED PERIODICALLY OVER THE LAST6
COUPLE OF WEEKS.

POWERS
Special weather statement, Oct 4, 11:58 AM CDT, 47 minutes before
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Special weather statement, Oct 4, 11:58 AM CDT, 47 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 Omaha, NE issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Oct 4, 7:48 AM CDTSevere Thunderstorm WarningOAXMadison, Platte47 min
Oct 4, 8:07 AM CDTSevere Thunderstorm WarningOAXPierce, Wayne33 min
Oct 4, 10:50 AM CDTSevere Thunderstorm WarningOAXCass, Otoe35 min
Oct 4, 10:58 AM CDTSevere Thunderstorm WarningOAXBurt, Dodge32 min
Oct 4, 11:20 AM CDTSevere Thunderstorm WarningOAXDouglas, Washington35 min
Oct 4, 11:34 AM CDTSevere Thunderstorm WarningOAXBurt36 min
Oct 4, 11:46 AM CDTSevere Thunderstorm WarningOAXDouglas, Sarpy34 min
Oct 4, 11:46 AM CDTSevere Thunderstorm WarningOAXCass34 min
Oct 4, 12:21 PM CDTSevere Thunderstorm WarningOAXOtoe34 min
Oct 4, 12:30 PM CDTSevere Thunderstorm WarningOAXCass, Sarpy30 min
Oct 4, 12:45 PM CDTSevere Thunderstorm WarningOAXDouglas35 min
Oct 4, 2:50 PM CDTSevere Thunderstorm WarningOAXSeward35 min
Oct 4, 2:57 PM CDTSevere Thunderstorm WarningOAXBoone33 min
Oct 4, 3:06 PM CDTSevere Thunderstorm WarningOAXButler34 min
Oct 4, 4:30 PM CDTTornado WarningOAXJefferson, Saline50 min
Oct 4, 5:23 PM CDTSevere Thunderstorm WarningOAXGage, Lancaster, Saline47 min
Oct 4, 6:50 PM CDTSevere Thunderstorm WarningOAXCass, Otoe35 min

Nearby

Severe Thunderstorm Warnings in Nebraska, 1998Severe Thunderstorm Warnings in Iowa, 1998Every 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; radar from the NEXRAD Level II archive.