Alert archive / Nebraska / Wind Advisories in 2010

Wind Advisory 7, NWS Omaha, NE

April 29, 201021 counties in Nebraska; 8 counties in Iowa

NWS Omaha, NE issued this wind advisory at Apr 29, 2010, 4:00 AM CDT for 21 counties in Nebraska; 8 counties in Iowa. It took effect at Apr 29, 2010, 9:00 AM CDT. It was in force for 10 hr.

The area

The counties it named.

The facts

Issued: Apr 29, 2010, 4:00 AM CDT (09:00 UTC)
In effect from: Apr 29, 2010, 9:00 AM CDT
Expired: Apr 29, 2010, 7:00 PM CDT
In force: 10 hr
Issued by: NWS Omaha, NE

All 29 counties

Fremont County, IA, Harrison County, IA, Mills County, IA, Monona County, IA, Montgomery County, IA, Page County, IA, Pottawattamie County, IA, Shelby County, IA, Burt County, NE, Butler County, NE, Cass County, NE, Colfax County, NE, Cuming County, NE, Dodge County, NE, Douglas County, NE, Gage County, NE, Jefferson County, NE, Johnson County, NE, Lancaster County, NE, Nemaha County, NE, Otoe County, NE, Pawnee County, NE, Richardson County, NE, Saline County, NE, Sarpy County, NE, Saunders County, NE, Seward County, NE, Thurston County, NE, Washington County, NE

The radar

The Omaha radar (KOAX), 30 km from the middle of the area, began a volume at 09:01 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 00:00Z, 9.0 hours before the alert went out and 30 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1888 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 165 m²/s²
0-3 km storm-relative helicity: 460 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this wind advisory 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 wind advisory went out at Apr 29, 3:34 AM CDT, 26 minutes earlier.

Area forecast discussion, Apr 29, 3:34 AM CDT, 26 minutes before

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Hazardous weather outlook, Apr 28, 5:27 PM CDT, 10 hours 33 minutes before

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</head>
<body>
  <main class="wrap">
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      <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>
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        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 Omaha, NE issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 29, 6:41 PM CDT	Severe Thunderstorm Warning	OAX	Jefferson, Saline	34 min

Nearby

Wind Advisories in Nebraska, 2010 Wind Advisories in Iowa, 2010 Every wind advisory in 2010

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.