Alert archive / Nebraska / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 256, NWS Omaha, NE

June 30, 2014Antelope County, Knox County, Pierce County, Nebraska

NWS Omaha, NE issued this severe thunderstorm warning at Jun 30, 2014, 3:51 AM CDT for Antelope County, Knox County, Pierce County, Nebraska. It was in force for 39 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
Jun 30, 2014, 3:51 AM CDT (08:51 UTC)
Expired
Jun 30, 2014, 4:30 AM CDT
In force
39 min
Issued by
NWS Omaha, NE
Area
Storm-based polygon
Hail
1.5 in
Wind
60.0 mph

Counties Antelope County, NE, Knox County, NE, Pierce County, NE

The radar

The Sioux Falls radar (KFSD), 164 km from the middle of the area, began a volume at 08:51 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jun 30, 1:02 AM CDTSevere Thunderstorm WatchSPC10 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 8.9 hours before the alert went out and 169 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 2014-06-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2027 joules per kilogram.LCLLFCEL10008507005003002001001 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 2014-06-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 146 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
2027 J/kg
Mixed-layer CIN
-17 J/kg
Mixed-layer LCL
1288 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
146 m²/s²
0-3 km storm-relative helicity
271 m²/s²
Significant tornado parameter
2.3
Supercell composite
24.3

Open this sounding in Storm Lab

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.

NWS Omaha, NE wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 30, 2:45 AM CDT, 1 hour 6 minutes earlier.

Area forecast discussion, Jun 30, 2:45 AM CDT, 1 hour 6 minutes before
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Hazardous weather outlook, Jun 30, 3:28 AM CDT, 23 minutes before
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</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.
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        Please try again in a few minutes.
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The office that day

Everything else NWS Omaha, NE issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 29, 7:00 PM CDTSevere Thunderstorm WarningOAXBurt30 min
Jun 30, 2:56 AM CDTFlash Flood WatchOAXBurt, Colfax, Cuming, Dodge, Douglas, Madison and 8 more10 hr
Jun 30, 3:33 AM CDTSevere Thunderstorm WarningOAXAntelope, Knox, Pierce27 min
Jun 30, 4:01 AM CDTSevere Thunderstorm WarningOAXCedar, Pierce29 min
Jun 30, 4:29 AM CDTSevere Thunderstorm WarningOAXCedar, Pierce31 min
Jun 30, 6:26 AM CDTSevere Thunderstorm WarningOAXCedar, Pierce34 min
Jun 30, 7:12 AM CDTSevere Thunderstorm WarningOAXBurt, Dodge, Washington33 min
Jun 30, 7:20 AM CDTSevere Thunderstorm WarningOAXAntelope, Knox29 min
Jun 30, 7:29 AM CDTSevere Thunderstorm WarningOAXCedar, Pierce, Wayne46 min
Jun 30, 7:59 AM CDTTornado WarningOAXPierce, Wayne31 min
Jun 30, 8:16 AM CDTSevere Thunderstorm WarningOAXBurt, Washington44 min
Jun 30, 8:24 AM CDTTornado WarningOAXCuming, Stanton, Thurston, Wayne36 min
Jun 30, 8:51 AM CDTSevere Thunderstorm WarningOAXAntelope, Boone39 min
Jun 30, 8:59 AM CDTSevere Thunderstorm WarningOAXBurt, Cuming, Thurston31 min
Jun 30, 9:18 AM CDTSevere Thunderstorm WarningOAXBurt, Thurston42 min
Jun 30, 9:27 AM CDTSpecial Weather StatementOAXMadison, Pierce, Wayne48 min
Jun 30, 9:57 AM CDTSevere Thunderstorm WarningOAXColfax, Cuming, Madison, Platte, Stanton, Wayne48 min
Jun 30, 10:02 AM CDTSevere Thunderstorm WarningOAXAntelope, Madison, Pierce28 min
Jun 30, 10:16 AM CDTSevere Thunderstorm WarningOAXBurt, Cuming, Thurston, Wayne44 min
Jun 30, 10:37 AM CDTFlash Flood WarningOAXBurt, Cuming, Stanton, Thurston, Wayne3 hr
Jun 30, 10:37 AM CDTSevere Thunderstorm WarningOAXBurt, Cuming, Thurston53 min
Jun 30, 10:41 AM CDTSpecial Weather StatementOAXPierce, Wayne49 min
Jun 30, 10:51 AM CDTSevere Thunderstorm WarningOAXPierce, Wayne39 min
Jun 30, 11:04 AM CDTFlash Flood WarningOAXBurt, Thurston3 hr
Jun 30, 11:10 AM CDTSevere Thunderstorm WarningOAXBurt65 min
Jun 30, 11:24 AM CDTSevere Thunderstorm WarningOAXThurston, Wayne51 min
Jun 29, 7:41 PM CDTSpecial Weather StatementOAXHarrison19 min
Jun 29, 8:09 PM CDTTornado WarningOAXShelby20 min
Jun 30, 7:27 AM CDTSpecial Weather StatementOAXHarrison48 min
Jun 30, 7:43 AM CDTSevere Thunderstorm WarningOAXHarrison, Pottawattamie32 min
Jun 30, 7:45 AM CDTSevere Thunderstorm WarningOAXHarrison30 min
Jun 30, 8:14 AM CDTSevere Thunderstorm WarningOAXPottawattamie46 min
Jun 30, 8:45 AM CDTSevere Thunderstorm WarningOAXHarrison, Shelby45 min
Jun 30, 8:57 AM CDTSevere Thunderstorm WarningOAXPottawattamie, Shelby33 min
Jun 30, 9:28 AM CDTSevere Thunderstorm WarningOAXShelby34 min
Jun 30, 9:39 AM CDTSevere Thunderstorm WarningOAXShelby23 min
Jun 30, 9:58 AM CDTSevere Thunderstorm WarningOAXMonona32 min
Jun 30, 11:36 AM CDTSevere Thunderstorm WarningOAXShelby39 min
Jun 30, 11:50 AM CDTSevere Thunderstorm WarningOAXPottawattamie25 min
Jun 30, 11:56 AM CDTFlash Flood WarningOAXHarrison, Pottawattamie, Shelby3 hr
Jun 30, 3:03 PM CDTAreal Flood AdvisoryOAXShelby3 hr

Nearby

Severe Thunderstorm Warnings in Nebraska, 2014Every severe thunderstorm warning in 2014

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.