Alert archive / Pennsylvania / Winter Storm Warnings in 2009

Winter Storm Warning 6, NWS State College, PA

December 8, 20094 counties in Pennsylvania

NWS State College, PA issued this winter storm warning at Dec 8, 2009, 11:13 AM EST for 4 counties in Pennsylvania. It took effect at Dec 8, 2009, 7:00 PM EST. It was in force for 13 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Dec 8, 2009, 11:13 AM EST (16:13 UTC)
In effect from: Dec 8, 2009, 7:00 PM EST
Expired: Dec 9, 2009, 7:56 AM EST
In force: 13 hr
Issued by: NWS State College, PA

Counties Cambria County, PA, McKean County, PA, Potter County, PA, Somerset County, PA

The radar

The State College radar (KCCX), 47 km from the middle of the area, began a volume at 16:15 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

Pittsburgh, PA (KPIT), launched 12:00Z, 4.2 hours before the alert went out and 146 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: 741 m above ground
0-6 km bulk shear: 85 kt
0-1 km storm-relative helicity: -43 m²/s²
0-3 km storm-relative helicity: 84 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 storm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS State College, PA wrote its last area forecast discussion before this winter storm warning went out at Dec 8, 7:33 AM EST, 3 hours 40 minutes earlier.

Area forecast discussion, Dec 8, 7:33 AM EST, 3 hours 40 minutes before

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Hazardous weather outlook, Dec 8, 6:15 AM EST, 4 hours 58 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.
      </p>
      <p id="message2">
        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 State College, PA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 8, 6:12 AM EST	Winter Weather Advisory	CTP	Bedford, Blair, Cameron, Centre, Clearfield, Clinton and 19 more	26 hr
Dec 8, 1:57 PM EST	High Wind Watch	CTP	Cambria, Cameron, Clearfield, Elk, McKean, Potter and 2 more	14 hr

Nearby

Winter Storm Warnings in Pennsylvania, 2009 Every winter storm warning in 2009

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.