Alert archive / Nebraska / Winter Weather Advisories in 2012

Winter Weather Advisory 2, NWS North Platte, NE

February 2, 20129 counties in Nebraska

NWS North Platte, NE issued this winter weather advisory at Feb 2, 2012, 2:56 PM CST for 9 counties in Nebraska. It took effect at Feb 3, 2012, 6:00 AM CST. It was in force for 29 hr.

The area

The counties it named.

The facts

Issued: Feb 2, 2012, 2:56 PM CST (20:56 UTC)
In effect from: Feb 3, 2012, 6:00 AM CST
Expired: Feb 4, 2012, 11:05 AM CST
In force: 29 hr
Issued by: NWS North Platte, NE

Counties Brown County, NE, Chase County, NE, Cherry County, NE, Grant County, NE, Holt County, NE, Hooker County, NE, Perkins County, NE, Rock County, NE, Thomas County, NE

The radar

The North Platte radar (KLNX), 11 km from the middle of the area, began a volume at 20:54 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

N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 8.9 hours before the alert went out and 84 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: 2360 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: -11 m²/s²
0-3 km storm-relative helicity: 53 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 winter weather advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS North Platte, NE wrote its last area forecast discussion before this winter weather advisory went out at Feb 2, 11:54 AM CST, 3 hours 2 minutes earlier.

Area forecast discussion, Feb 2, 11:54 AM CST, 3 hours 2 minutes before

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Hazardous weather outlook, Feb 2, 10:19 AM CST, 4 hours 37 minutes before

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</head>
<body>
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      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
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        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 North Platte, NE issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 2, 3:46 AM CST	Blizzard Watch	LBF	Chase, Custer, Frontier, Hayes, Lincoln, Perkins	11 hr
Feb 2, 2:56 PM CST	Blizzard Warning	LBF	Chase, Deuel, Keith, Perkins	38 hr
Feb 2, 2:56 PM CST	Winter Storm Warning	LBF	Arthur, Blaine, Custer, Frontier, Garden, Garfield and 8 more	44 hr

Nearby

Winter Weather Advisories in Nebraska, 2012 Every winter weather advisory in 2012

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.