Alert archive / Pennsylvania / Winter Weather Advisories in 2017

Winter Weather Advisory 4, NWS Cleveland, OH

February 12, 2017Crawford County, Erie County, Pennsylvania

NWS Cleveland, OH issued this winter weather advisory at Feb 12, 2017, 3:42 AM EST for Crawford County, Erie County, Pennsylvania. It took effect at Feb 12, 2017, 4:00 PM EST. It was in force for 17 hr.

The area

The counties it named.

The facts

Issued: Feb 12, 2017, 3:42 AM EST (08:42 UTC)
In effect from: Feb 12, 2017, 4:00 PM EST
Expired: Feb 13, 2017, 8:52 AM EST
In force: 17 hr
Issued by: NWS Cleveland, OH

Counties Crawford County, PA, Erie County, PA

The radar

The Pittsburgh radar (KPBZ), 153 km from the middle of the area, began a volume at 08:44 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 (KAGC), launched 00:00Z, 8.7 hours before the alert went out and 166 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: 1306 m above ground
0-6 km bulk shear: 70 kt
0-1 km storm-relative helicity: 207 m²/s²
0-3 km storm-relative helicity: 231 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 Cleveland, OH wrote its last area forecast discussion before this winter weather advisory went out at Feb 11, 11:30 PM EST, 4 hours 12 minutes earlier.

Area forecast discussion, Feb 11, 11:30 PM EST, 4 hours 12 minutes before

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Hazardous weather outlook, Feb 11, 5:35 AM EST, 22 hours 7 minutes before

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  <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 Cleveland, OH issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 12, 3:53 AM EST	Wind Advisory	CLE	Ashland, Ashtabula, Cuyahoga, Erie, Geauga, Holmes and 14 more	21 hr
Feb 12, 4:07 AM EST	Gale Warning	CLE		24 hr
Feb 12, 3:38 PM EST	Low Water Advisory	CLE		10 hr
Feb 12, 3:42 AM EST	Winter Storm Warning	CLE	Erie	29 hr

Nearby

Winter Weather Advisories in Pennsylvania, 2017 Every winter weather advisory in 2017

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.