Alert archive / Tennessee / Wind Advisories in 2009

Wind Advisory 19, NWS Morristown, TN

December 10, 20098 counties in Tennessee; 7 counties in Virginia

NWS Morristown, TN issued this wind advisory at Dec 10, 2009, 4:20 AM EST for 8 counties in Tennessee; 7 counties in Virginia. It took effect at Dec 10, 2009, 8:00 AM EST. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued: Dec 10, 2009, 4:20 AM EST (09:20 UTC)
In effect from: Dec 10, 2009, 8:00 AM EST
Expired: Dec 10, 2009, 2:53 PM EST
In force: 7 hr
Issued by: NWS Morristown, TN

Counties Carter County, TN, Greene County, TN, Hancock County, TN, Hawkins County, TN, Johnson County, TN, Sullivan County, TN, Unicoi County, TN, Washington County, TN, City of Bristol, VA, City of Norton, VA, Lee County, VA, Russell County, VA, Scott County, VA, Washington County, VA, Wise County, VA

The radar

The Knoxville radar (KMRX), 92 km from the middle of the area, began a volume at 09:20 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

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 9.3 hours before the alert went out and 239 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: 2246 m above ground
0-6 km bulk shear: 91 kt
0-1 km storm-relative helicity: 421 m²/s²
0-3 km storm-relative helicity: 182 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 advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Morristown, TN wrote its last area forecast discussion before this wind advisory went out at Dec 9, 6:33 PM EST, 9 hours 47 minutes earlier.

Area forecast discussion, Dec 9, 6:33 PM EST, 9 hours 47 minutes before

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Hazardous weather outlook, Dec 9, 5:45 AM EST, 22 hours 35 minutes before

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<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 Morristown, TN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 10, 5:40 AM EST	River Flood Warning	MRX	Hamilton	27 hr

Nearby

Wind Advisories in Tennessee, 2009 Wind Advisories in Virginia, 2009 Every wind advisory 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.