Alert archive / Pennsylvania / Wind Chill Advisories in 2015

Wind Chill Advisory 8, NWS Pittsburgh, PA

February 18, 201514 counties in Pennsylvania; 11 counties in Ohio; 6 counties in West Virginia

NWS Pittsburgh, PA issued this wind chill advisory at Feb 18, 2015, 4:08 AM EST for 14 counties in Pennsylvania; 11 counties in Ohio; 6 counties in West Virginia. It took effect at Feb 19, 2015, 1:00 AM EST. It was in force for 35 hr.

The area

The counties it named.

The facts

Issued: Feb 18, 2015, 4:08 AM EST (09:08 UTC)
In effect from: Feb 19, 2015, 1:00 AM EST
Expired: Feb 20, 2015, 12:00 PM EST
In force: 35 hr
Issued by: NWS Pittsburgh, PA

All 31 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, Fayette County, PA, Forest County, PA, Greene County, PA, Jefferson County, PA, Lawrence County, PA, Mercer County, PA, Venango County, PA, Washington County, PA, Westmoreland County, PA, Brooke County, WV, Hancock County, WV, Marion County, WV, Marshall County, WV, Ohio County, WV, Wetzel County, WV

The radar

The Pittsburgh radar (KPBZ), 25 km from the middle of the area, began a volume at 09:07 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, 9.1 hours before the alert went out and 32 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: 1846 m above ground
0-6 km bulk shear: 94 kt
0-1 km storm-relative helicity: 8 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 wind chill advisory 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 wind chill advisory went out at Feb 18, 1:11 AM EST, 2 hours 57 minutes earlier.

Area forecast discussion, Feb 18, 1:11 AM EST, 2 hours 57 minutes before

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Hazardous weather outlook, Feb 17, 9:12 PM EST, 6 hours 56 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>
      <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 Pittsburgh, PA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 17, 8:59 PM EST	Winter Weather Advisory	PBZ	Fayette, Westmoreland	25 hr
Feb 18, 10:14 AM EST	Special Weather Statement	PBZ	Allegheny, Armstrong, Butler	61 min
Feb 18, 12:03 PM EST	Special Weather Statement	PBZ	Beaver, Butler, Lawrence	57 min
Feb 18, 1:05 PM EST	Special Weather Statement	PBZ	Allegheny, Butler, Washington	55 min
Feb 18, 2:07 PM EST	Special Weather Statement	PBZ	Armstrong, Fayette, Greene, Indiana, Westmoreland	83 min

Nearby

Wind Chill Advisories in Pennsylvania, 2015 Wind Chill Advisories in Ohio, 2015 Wind Chill Advisories in West Virginia, 2015 Every wind chill advisory in 2015

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.