Alert archive / Virginia / Areal Flood Advisories in 2021

Areal Flood Advisory 9, NWS Blacksburg, VA

March 28, 2021Tazewell County, Virginia; Mercer County, West Virginia

NWS Blacksburg, VA issued this areal flood advisory at Mar 28, 2021, 10:05 AM EDT for Tazewell County, Virginia; Mercer County, West Virginia. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued: Mar 28, 2021, 10:05 AM EDT (14:05 UTC)
Expired: Mar 28, 2021, 1:45 PM EDT
In force: 4 hr
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon

Counties Tazewell County, VA, Mercer County, WV

The radar

The Roanoke radar (KFCX), 98 km from the middle of the area, began a volume at 14:05 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

Roanoke, VA (KRNK), launched 12:00Z, 2.1 hours before the alert went out and 163 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: 708 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 274 m²/s²
0-3 km storm-relative helicity: 285 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 areal flood advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Blacksburg, VA wrote its last area forecast discussion before this areal flood advisory went out at Mar 28, 6:58 AM EDT, 3 hours 7 minutes earlier.

Area forecast discussion, Mar 28, 6:58 AM EDT, 3 hours 7 minutes before

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Hazardous weather outlook, Mar 28, 4:03 AM EDT, 6 hours 2 minutes before

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  <meta name="viewport" content="width=device-width, initial-scale=1">
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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 Blacksburg, VA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 28, 12:05 AM EDT	Special Weather Statement	RNK	City of Danville	25 min
Mar 28, 2:35 AM EDT	Special Weather Statement	RNK	Bland, Smyth, Wythe	25 min
Mar 28, 2:43 AM EDT	Areal Flood Advisory	RNK	Bland, Grayson, Smyth, Tazewell, Wythe	3 hr
Mar 28, 2:47 AM EDT	Special Weather Statement	RNK	Smyth	28 min
Mar 28, 3:12 AM EDT	Special Weather Statement	RNK	Bland, Wythe	33 min
Mar 28, 3:58 AM EDT	Wind Advisory	RNK	Alleghany, Amherst, Bath, Bedford, Bland, Botetourt and 21 more	22 hr
Mar 28, 7:52 AM EDT	Areal Flood Advisory	RNK	Smyth, Tazewell	4 hr
Mar 28, 2:12 PM EDT	Special Weather Statement	RNK	Alleghany, Bath, Bland, Giles, Grayson, Smyth and 3 more	63 min
Mar 28, 3:28 PM EDT	Special Weather Statement	RNK	Alleghany, Bath, Botetourt, Craig, Rockbridge, City of Buena Vista and 2 more	62 min
Mar 28, 3:33 PM EDT	Special Weather Statement	RNK	Bedford, Carroll, Floyd, Franklin, Montgomery, Pulaski and 6 more	57 min
Mar 28, 3:54 PM EDT	Special Weather Statement	RNK	Grayson	66 min
Mar 28, 4:33 PM EDT	Special Weather Statement	RNK	Amherst, Bedford, Botetourt, Campbell, Rockbridge, City of Buena Vista and 2 more	72 min
Mar 28, 4:38 PM EDT	Special Weather Statement	RNK	Carroll, Floyd, Franklin, Patrick, City of Galax	82 min
Mar 28, 5:40 PM EDT	Special Weather Statement	RNK	Appomattox, Buckingham, Campbell, City of Lynchburg	80 min
Mar 28, 6:07 PM EDT	Special Weather Statement	RNK	Pittsylvania	53 min
Mar 28, 7:06 PM EDT	Special Weather Statement	RNK	Halifax, Pittsylvania, City of Danville	54 min
Mar 28, 7:59 PM EDT	Special Weather Statement	RNK	Halifax	46 min
Mar 27, 10:12 PM EDT	Special Weather Statement	RNK	Alleghany, Ashe	33 min
Mar 27, 11:07 PM EDT	Special Weather Statement	RNK	Stokes, Surry	23 min
Mar 27, 11:29 PM EDT	Special Weather Statement	RNK	Rockingham, Stokes	31 min
Mar 28, 6:03 PM EDT	Special Weather Statement	RNK	Stokes, Surry, Yadkin	57 min

Nearby

Areal Flood Advisories in Virginia, 2021 Areal Flood Advisories in West Virginia, 2021 Every areal flood advisory in 2021

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.