Alert archive / Virginia / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 169, NWS Blacksburg, VA

July 31, 20195 counties in Virginia

NWS Blacksburg, VA issued this severe thunderstorm warning at Jul 31, 2019, 4:52 PM EDT for 5 counties in Virginia. It was in force for 53 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 31, 2019, 4:52 PM EDT (20:52 UTC)
Expired: Jul 31, 2019, 5:45 PM EDT
In force: 53 min
Issued by: NWS Blacksburg, VA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Amherst County, VA, Bedford County, VA, Botetourt County, VA, City of Buena Vista, VA, Rockbridge County, VA

The radar

The Roanoke radar (KFCX), 97 km from the middle of the area, began a volume at 20:54 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, 8.9 hours before the alert went out and 45 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: 7 J/kg
Mixed-layer CIN: -188 J/kg
Mixed-layer LCL: 1412 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: -5 m²/s²
0-3 km storm-relative helicity: 9 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 severe thunderstorm warning 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 severe thunderstorm warning went out at Jul 31, 3:45 PM EDT, 1 hour 7 minutes earlier.

Area forecast discussion, Jul 31, 3:45 PM EDT, 1 hour 7 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <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.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

Hazardous weather outlook, Jul 31, 3:51 PM EDT, 1 hour 1 minute before

Hazardous Weather Outlook
National Weather Service Blacksburg VA
351 PM EDT Wed Jul 31 2019

NCZ001>006-018>020-VAZ007-009>020-022>024-032>035-043>047-058-059-
WVZ042>044-507-508-011100-
Ashe-Alleghany NC-Surry-Stokes-Rockingham-Caswell-Watauga-Wilkes-
Yadkin-Tazewell-Smyth-Bland-Giles-Wythe-Pulaski-Montgomery-Grayson-
Carroll-Floyd-Craig-Alleghany VA-Bath-Roanoke-Botetourt-Rockbridge-
Patrick-Franklin-Bedford-Amherst-Henry-Pittsylvania-Campbell-
Appomattox-Buckingham-Halifax-Charlotte-Mercer-Summers-Monroe-
Eastern Greenbrier-Western Greenbrier-
351 PM EDT Wed Jul 31 2019

This Hazardous Weather Outlook is for north central North Carolina,
northwest North Carolina, central Virginia, south central Virginia,
southwest Virginia, west central Virginia and southeast West
Virginia.

.DAY ONE...This afternoon and tonight.

Isolated to scattered strong to severe thunderstorms will be possible
this evening until around sunset. Damaging wind gusts and localized
flooding will be the main hazards. Marginally severe hail will also
be possible in the strongest storms.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Scattered to numerous showers and thunderstorms are expected each
day, decreasing slightly during the weekend and early next week. The
main concern will be locally heavy rainfall and repeated rainfall
from day-to-day resulting in localized flooding. A few storms could
also be severe at times.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed at times through the period
primarily to help identify wind damage and areas of flooding.

RAB

In the hours before

Special weather statement, Jul 31, 3:24 PM EDT, 1 hour 28 minutes before

Special Weather Statement
National Weather Service BLACKSBURG VA
324 PM EDT Wed Jul 31 2019

NCZ003-020-312000-
Yadkin-Surry-
324 PM EDT Wed Jul 31 2019

...A STRONG THUNDERSTORM WILL AFFECT YADKIN AND SURRY COUNTIES...

Until 400 PM EDT.

At 323 PM EDT, a strong thunderstorm was located near Boonville,
moving northeast at 15 mph.

Winds in excess of 40 mph are possible with this storm.

Locations impacted include...
Elkin...
Fairview...
Jonesville...
Boonville...
and East Bend.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 3624 8087 3626 8087 3644 8061 3627 8045
      3624 8045 3622 8043 3621 8045 3612 8078
TIME...MOT...LOC 1923Z 230DEG 15KT 3621 8075

VFJ

Special weather statement, Jul 31, 3:50 PM EDT, 1 hour 2 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <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.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

Local storm report, Jul 31, 3:52 PM EDT, 1 hour before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <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.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

Special weather statement, Jul 31, 4:05 PM EDT, 47 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <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.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

Special weather statement, Jul 31, 4:16 PM EDT, 36 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <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.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

Special weather statement, Jul 31, 4:48 PM EDT, 4 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <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.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

The office that day

Everything else NWS Blacksburg, VA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 31, 12:33 PM EDT	Special Weather Statement	RNK	Grayson	57 min
Jul 31, 1:25 PM EDT	Severe Thunderstorm Warning	RNK	Grayson, Smyth	25 min
Jul 31, 1:57 PM EDT	Special Weather Statement	RNK	Bath	63 min
Jul 31, 2:25 PM EDT	Special Weather Statement	RNK	Giles, City of Radford	50 min
Jul 31, 2:36 PM EDT	Special Weather Statement	RNK	Craig	39 min
Jul 31, 2:41 PM EDT	Severe Thunderstorm Warning	RNK	Bath, Rockbridge	22 min
Jul 31, 2:49 PM EDT	Special Weather Statement	RNK	Grayson	41 min
Jul 31, 3:00 PM EDT	Severe Thunderstorm Warning	RNK	Giles, Pulaski	45 min
Jul 31, 3:16 PM EDT	Severe Thunderstorm Warning	RNK	Grayson	59 min
Jul 31, 3:34 PM EDT	Severe Thunderstorm Warning	RNK	Rockbridge	26 min
Jul 31, 3:38 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Bath, Botetourt, Rockbridge, City of Lexington	67 min
Jul 31, 4:05 PM EDT	Special Weather Statement	RNK	Floyd	25 min
Jul 31, 4:21 PM EDT	Severe Thunderstorm Warning	RNK	Bedford, Botetourt, Rockbridge	39 min
Jul 31, 4:48 PM EDT	Special Weather Statement	RNK	Floyd	57 min
Jul 31, 4:58 PM EDT	Special Weather Statement	RNK	Floyd	47 min
Jul 31, 5:01 PM EDT	Severe Thunderstorm Warning	RNK	Bedford, Botetourt, Roanoke	59 min
Jul 31, 5:05 PM EDT	Special Weather Statement	RNK	Alleghany	25 min
Jul 31, 5:17 PM EDT	Special Weather Statement	RNK	Smyth, Tazewell	58 min
Jul 31, 5:39 PM EDT	Special Weather Statement	RNK	Alleghany, City of Covington	66 min
Jul 31, 5:46 PM EDT	Special Weather Statement	RNK	Pulaski, City of Radford	44 min
Jul 31, 5:50 PM EDT	Special Weather Statement	RNK	City of Martinsville	25 min
Jul 31, 5:57 PM EDT	Special Weather Statement	RNK	Amherst	33 min
Jul 31, 6:02 PM EDT	Severe Thunderstorm Warning	RNK	Alleghany, Botetourt	33 min
Jul 31, 6:07 PM EDT	Special Weather Statement	RNK	Buckingham	53 min
Jul 31, 6:25 PM EDT	Special Weather Statement	RNK	Pittsylvania	35 min
Jul 31, 6:30 PM EDT	Severe Thunderstorm Warning	RNK	Halifax, Pittsylvania	60 min
Jul 31, 7:33 PM EDT	Flash Flood Warning	RNK	Halifax, Pittsylvania	4 hr
Jul 31, 7:42 PM EDT	Special Weather Statement	RNK	Halifax	33 min
Jul 31, 1:50 PM EDT	Areal Flood Advisory	RNK	Watauga	26 min
Jul 31, 2:17 PM EDT	Special Weather Statement	RNK	Ashe	28 min
Jul 31, 2:20 PM EDT	Severe Thunderstorm Warning	RNK	Ashe, Watauga, Wilkes	55 min
Jul 31, 3:24 PM EDT	Special Weather Statement	RNK	Yadkin	36 min
Jul 31, 3:50 PM EDT	Special Weather Statement	RNK	Caswell	25 min
Jul 31, 3:56 PM EDT	Severe Thunderstorm Warning	RNK	Surry, Wilkes	49 min
Jul 31, 6:19 PM EDT	Special Weather Statement	RNK	Caswell	26 min
Jul 31, 6:56 PM EDT	Special Weather Statement	RNK	Caswell	34 min
Jul 31, 4:16 PM EDT	Special Weather Statement	RNK	Monroe, Summers	59 min
Jul 31, 6:33 PM EDT	Severe Thunderstorm Warning	RNK	Mercer	24 min

Nearby

Severe Thunderstorm Warnings in Virginia, 2019 Every severe thunderstorm warning in 2019

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.