Alert archive / Virginia / Areal Flood Advisories in 2021

Areal Flood Advisory 4, NWS Blacksburg, VA

March 1, 2021Bath County, Virginia

NWS Blacksburg, VA issued this areal flood advisory at Mar 1, 2021, 12:49 PM EST for Bath County, Virginia. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued: Mar 1, 2021, 12:49 PM EST (17:49 UTC)
Expired: Mar 1, 2021, 5:15 PM EST
In force: 4 hr
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon

County Bath County, VA

The radar

The Roanoke radar (KFCX), 124 km from the middle of the area, began a volume at 17:51 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, 5.8 hours before the alert went out and 98 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: 808 m above ground
0-6 km bulk shear: 71 kt
0-1 km storm-relative helicity: -301 m²/s²
0-3 km storm-relative helicity: -240 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 1, 9:49 AM EST, 3 hours earlier.

Area forecast discussion, Mar 1, 9:49 AM EST, 3 hours before

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Hazardous weather outlook, Mar 1, 8:57 AM EST, 3 hours 52 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.
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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 Blacksburg, VA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Feb 28, 7:07 PM EST	Flash Flood Warning	RNK	Bath	6 hr
Feb 28, 8:41 PM EST	Dense Fog Advisory	RNK	Amherst, Appomattox, Bedford, Botetourt, Buckingham, Campbell and 14 more	7 hr
Feb 28, 9:18 PM EST	Special Weather Statement	RNK	Alleghany, Bath, Craig, City of Covington	27 min
Mar 1, 1:14 AM EST	Areal Flood Warning	RNK	Alleghany, Bath	12 hr
Mar 1, 7:20 AM EST	Flood Watch	RNK	Bland, Tazewell	2 min
Mar 1, 7:31 AM EST	River Flood Warning	RNK	Tazewell	11 hr
Mar 1, 7:43 AM EST	Areal Flood Warning	RNK	Tazewell	25 hr
Mar 1, 1:22 PM EST	Wind Advisory	RNK	Bath	12 hr
Mar 1, 4:13 PM EST	Areal Flood Advisory	RNK	Alleghany, Botetourt	9 hr
Feb 28, 8:27 PM EST	Special Weather Statement	RNK	Greenbrier, Mercer, Monroe, Summers	63 min
Mar 1, 1:55 AM EST	Areal Flood Warning	RNK	Greenbrier, Summers	31 hr
Mar 1, 5:11 AM EST	River Flood Warning	RNK	Greenbrier, Monroe, Summers	27 hr

Nearby

Areal Flood Advisories in 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.