Alert archive / Pennsylvania / Winter Storm Warnings in 2018

Winter Storm Warning 1, NWS Pittsburgh, PA

January 11, 201811 counties in Pennsylvania; 11 counties in Ohio; Brooke County, Hancock County, Ohio County, West Virginia

NWS Pittsburgh, PA issued this winter storm warning at Jan 11, 2018, 3:06 PM EST for 11 counties in Pennsylvania; 11 counties in Ohio; Brooke County, Hancock County, Ohio County, West Virginia. It took effect at Jan 12, 2018, 4:00 PM EST. It was in force for 18 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: Jan 11, 2018, 3:06 PM EST (20:06 UTC)
In effect from: Jan 12, 2018, 4:00 PM EST
Expired: Jan 13, 2018, 10:00 AM EST
In force: 18 hr
Issued by: NWS Pittsburgh, PA

All 25 counties

Belmont County, OH, Carroll County, OH, Columbiana County, OH, Coshocton County, OH, Guernsey County, OH, Harrison County, OH, Jefferson County, OH, Monroe County, OH, Muskingum County, OH, Noble County, OH, Tuscarawas County, OH, Allegheny County, PA, Armstrong County, PA, Beaver County, PA, Butler County, PA, Clarion County, PA, Forest County, PA, Jefferson County, PA, Lawrence County, PA, Mercer County, PA, Venango County, PA, Washington County, PA, Brooke County, WV, Hancock County, WV, Ohio County, WV

The radar

The Pittsburgh radar (KPBZ), 28 km from the middle of the area, began a volume at 20:10 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 12:00Z, 8.1 hours before the alert went out and 41 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: 1209 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 260 m²/s²
0-3 km storm-relative helicity: 265 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 Pittsburgh, PA wrote its last area forecast discussion before this winter storm warning went out at Jan 11, 12:46 PM EST, 2 hours 20 minutes earlier.

Area forecast discussion, Jan 11, 12:46 PM EST, 2 hours 20 minutes before

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Hazardous weather outlook, Jan 11, 4:20 AM EST, 10 hours 46 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.
      </p>
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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 Pittsburgh, PA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jan 11, 3:07 AM EST	Winter Storm Watch	PBZ	Allegheny, Armstrong, Beaver, Butler, Clarion, Forest and 5 more	12 hr
Jan 11, 12:45 PM EST	Flood Watch	PBZ	Allegheny, Armstrong, Beaver, Butler, Clarion, Fayette and 8 more	32 hr
Jan 11, 3:06 PM EST	Winter Weather Advisory	PBZ	Fayette, Greene, Westmoreland	43 hr

Nearby

Winter Storm Warnings in Pennsylvania, 2018 Winter Storm Warnings in Ohio, 2018 Winter Storm Warnings in West Virginia, 2018 Every winter storm warning in 2018

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.